Download to read offline
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) {
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
67](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-67-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
68](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-68-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
69](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-69-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
70](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-70-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
71](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-71-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
82](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-82-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
83](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-83-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
84](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-84-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
85](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-85-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
86](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-86-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
90](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-90-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
91](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-91-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
92](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-92-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
93](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-93-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
94](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-94-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
95](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-95-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
96](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-96-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
97](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-97-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
98](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-98-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
99](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-99-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
100](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-100-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
101](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-101-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
102](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-102-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
103](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-103-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
104](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-104-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
105](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-105-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
107](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-107-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
108](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-108-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
109](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-109-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
110](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-110-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
111](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-111-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
112](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-112-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
114
package mai
n
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-114-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
115
package mai
n
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-115-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
116
package mai
n
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-116-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
117](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-117-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
118](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-118-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
119](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-119-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
120](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-120-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
121](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-121-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
122](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-122-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)...) // padding with NUL!!!!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
123](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-123-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
124](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-124-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
125](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-125-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
126](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-126-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
127](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-127-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
128](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-128-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
129](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-129-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
130](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-130-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
131](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-131-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
132](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-132-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
133](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-133-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte)
{
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
135](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-135-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte) {
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
136](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-136-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte) {
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
137](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-137-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
138](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-138-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
139](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-139-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
140](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-140-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
141](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-141-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
142](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-142-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
143](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-143-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
144](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-144-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
145](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-145-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
146](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-146-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
147](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-147-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
148](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-148-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
149](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-149-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
150](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-150-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
152](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-152-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
153](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-153-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
154](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-154-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
155](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-155-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
156](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-156-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
157](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-157-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
158](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-158-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
159](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-159-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
160](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-160-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
161](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-161-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
162](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-162-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
163](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-163-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
165](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-165-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey)
{
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
166](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-166-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Decrypt(key *rsa.PrivateKey, m, l []byte) ([]byte, error)
{
return rsa.DecryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
167](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-167-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey)
{
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
168](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-168-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
169](https://image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-169-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) {
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
67](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-67-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
68](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-68-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
69](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-69-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
70](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-70-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/tls
"
import . "fmt
"
func main()
{
Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn)
{
Fprintln(c, "hello world"
)
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
Rand: rand.Reader
,
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
71](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-71-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
82](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-82-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
83](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-83-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config
{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
84](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-84-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
85](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-85-2048.jpg)
![package mai
n
import "bufio
"
import "crypto/tls
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) {
if m, e := bufio.NewReader(c).ReadString('n'); e == nil
{
Printf(m
)
}
}
)
}
func ConfigTLS(c, k string) (r *tls.Config)
{
if cert, e := tls.LoadX509KeyPair(c, k); e == nil
{
r = &tls.Config{
Certificates: []tls.Certificate{ cert }
,
InsecureSkipVerify: true
,
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
86](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-86-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
90](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-90-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
91](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-91-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
92](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-92-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
93](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-93-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
94](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-94-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
95](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-95-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
96](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-96-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
97](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-97-2048.jpg)
![package mai
n
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello Worldn"
)
Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte)
{
c.WriteToUDP(HELLO_WORLD, a
)
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := conn.ReadFromUDP(b); e == nil
{
go f(conn, client, b[:n]
)
}
}
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
98](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-98-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
99](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-99-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
100](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-100-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
101](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-101-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
102](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-102-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
103](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-103-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024) {
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
104](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-104-2048.jpg)
![package mai
n
import "net
"
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.ListenUDP("udp", address); e == nil
{
ServeUDP(conn, func(c *net.UDPAddr, b []byte)
{
f(conn, c, b
)
})
}
}
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
for b := make([]byte, 1024); ; b = make([]byte, 1024)
{
if n, client, e := c.ReadFromUDP(b); e == nil
{
go f(client, b[:n]
)
}
}
}
go for the paranoid network programmer slideshare.net/feyeleanor
105](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-105-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
107](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-107-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
108](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-108-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn)
{
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
109](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-109-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
110](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-110-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
111](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-111-2048.jpg)
![package mai
n
import "bufio
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1024", func(conn net.Conn) {
if _, e := conn.Write([]byte("n")); e == nil
{
if m, e := bufio.NewReader(conn).ReadString('n'); e == nil
{
Printf("%v", m
)
}
}
}
)
}
func Dial(a string, f func(net.Conn))
{
if address, e := net.ResolveUDPAddr("udp", a); e == nil
{
if conn, e := net.DialUDP("udp", nil, address); e == nil
{
defer conn.Close(
)
f(conn
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
112](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-112-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
114
package mai
n
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-114-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
115
package mai
n
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-115-2048.jpg)
![go for the paranoid network programmer slideshare.net/feyeleanor
116
package mai
n
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
if m, e := Encrypt("Hello World", AES_KEY); e == nil
{
c.WriteToUDP(m, a
)
}
}
)
}
func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte))
{
// see udp serv
e
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte))
{
// see udp serv
e
}](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-116-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
117](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-117-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
118](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-118-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
119](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-119-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
120](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-120-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)…) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
121](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-121-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
122](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-122-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize - p
b = append(b, make([]byte, p)...) // padding with NUL!!!!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
123](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-123-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
124](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-124-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func Encrypt(m, k string) (o []byte, e error)
{
if o, e = PaddedBuffer([]byte(m)); e == nil
{
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil
{
o = CryptBlocks(o, b
)
}
}
retur
n
}
func PaddedBuffer(m []byte) (b []byte, e error)
{
b = append(b, m...
)
if p := len(b) % aes.BlockSize; p != 0
{
p = aes.BlockSize -
p
b = append(b, make([]byte, p)...) // padding with NUL!!!
!
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
125](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-125-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
126](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-126-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
127](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-127-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
128](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-128-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
129](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-129-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
130](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-130-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
131](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-131-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
132](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-132-2048.jpg)
![package mai
n
import "crypto/aes
"
import "crypto/cipher
"
func CryptBlocks(b []byte, c cipher.Block) (o []byte)
{
o = make([]byte, aes.BlockSize + len(b)
)
copy(o, IV()
)
enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize]
)
enc.CryptBlocks(o[aes.BlockSize:], b
)
retur
n
}
func IV() (b []byte)
{
b = make([]byte, aes.BlockSize
)
if _, e := rand.Read(b); e != nil
{
panic(e
)
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
133](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-133-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte)
{
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
135](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-135-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345
"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte) {
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
136](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-136-2048.jpg)
![package mai
n
import . "fmt
"
import "net
"
const AES_KEY = "0123456789012345"
func main()
{
Dial(":1025", func(conn net.Conn) {
RequestMessage(conn, func(m []byte) {
if m, e := Decrypt(m, AES_KEY); e == nil
{
Printf("%sn", m
)
}
}
)
}
)
}
func Dial(a string, f func(net.Conn))
{
// see udp reques
t
}
go for the paranoid network programmer slideshare.net/feyeleanor
137](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-137-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
138](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-138-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
139](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-139-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
140](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-140-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
141](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-141-2048.jpg)
![package mai
n
import "net
"
func RequestMessage(conn net.Conn, f func([]byte)) (e error)
{
if _, e = conn.Write([]byte("n")); e == nil
{
m := make([]byte, 1024
)
var n in
t
if n, e = conn.Read(m); e == nil
{
f(m[:n]
)
}
}
retur
n
}
go for the paranoid network programmer slideshare.net/feyeleanor
142](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-142-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
143](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-143-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
144](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-144-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
145](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-145-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
146](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-146-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
147](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-147-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
148](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-148-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
149](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-149-2048.jpg)
![package mai
n
import "crypto/cipher
"
import "crypto/aes
"
func Decrypt(m []byte, k string) (r []byte, e error)
{
var b cipher.Bloc
k
if b, e = aes.NewCipher([]byte(k)); e == nil
{
var iv []byt
e
iv, m = Unpack(m
)
c := cipher.NewCBCDecrypter(b, iv
)
r = make([]byte, len(m)
)
c.CryptBlocks(r, m
)
}
retur
n
}
func Unpack(m []byte) (iv, r []byte)
{
return m[:aes.BlockSize], m[aes.BlockSize:
]
}
go for the paranoid network programmer slideshare.net/feyeleanor
150](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-150-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
152](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-152-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKey
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
153](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-153-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
154](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-154-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
155](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-155-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
156](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-156-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
157](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-157-2048.jpg)
![package mai
n
import . "bytes
"
import "crypto/rsa
"
import "encoding/gob
"
import "net
"
func main()
{
HELLO_WORLD := []byte("Hello World"
)
RSA_LABEL := []byte("served"
)
Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) {
var key rsa.PublicKe
y
if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil
{
if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil
{
c.WriteToUDP(m, a
)
}
}
retur
n
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
158](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-158-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
159](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-159-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
160](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-160-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
161](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-161-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
162](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-162-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error)
{
return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
163](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-163-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
165](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-165-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey)
{
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
166](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-166-2048.jpg)
![package mai
n
import "crypto/rand
"
import "crypto/rsa
"
import "crypto/sha1
"
func Decrypt(key *rsa.PrivateKey, m, l []byte) ([]byte, error)
{
return rsa.DecryptOAEP(sha1.New(), rand.Reader, key, m, l
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
167](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-167-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey)
{
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
168](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-168-2048.jpg)
![package mai
n
import "crypto/rsa
"
import . "fmt
"
import "net
"
func main()
{
Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) {
if m, e := ReadStream(c); e == nil
{
if m, e := Decrypt(k, m, []byte("served")); e == nil
{
Println(string(m)
)
}
}
}
)
}
go for the paranoid network programmer slideshare.net/feyeleanor
169](https://crownmelresort.com/image.slidesharecdn.com/gofortheparanoidnetworkprogrammer3rdedition-210218223621/75/Go-for-the-paranoid-network-programmer-3rd-edition-169-2048.jpg)
Uploaded byEleanor McHugh
Go for the paranoid network programmer, 3rd edition
The document presents a series of examples for setting up HTTP servers in Go, demonstrating various configurations for handling requests with web sockets and encryption using TLS. It includes sample code for both plaintext and secured HTTP servers, illustrating concurrent server handling and response formatting. Key functions highlighted are for HTTP handling and server lifecycle management using goroutines and synchronization techniques.
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Go for the paranoid network programmer, 3rd edition
- 1. go for the paranoidnetwork programme r (now with WebSockets ) @feyeleanor 1 go for the paranoid network programmer slideshare.net/feyeleanor
- 2. twitter://@feyeleanor go for theparanoid network programmer slideshare.net/feyeleanor
- 3. high voltage networkin g concurrenc y cryptograph y go forthe paranoid network programmer slideshare.net/feyeleanor
- 4. http 4 go for theparanoid network programmer slideshare.net/feyeleanor
- 5. package mai n import ( . "fmt " "net/http" ) constMESSAGE = "hello world " const ADDRESS = ":1024 " func main() { http.HandleFunc("/hello", Hello ) if e := http.ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 5
- 6. package mai n import ( . "fmt " ."net/http" ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 6
- 7. package mai n import ( . "fmt " .”net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 7
- 8. package mai n import ( . "fmt " .”net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 8
- 9. package mai n import ( . "fmt " .”net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain") Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 9
- 10. package mai n import ( . "fmt " .”net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024" func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e ) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 10
- 11. package mai n import ( . "fmt " .”net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", Hello ) if e := ListenAndServe(ADDRESS, nil); e != nil { Println(e) } } func Hello(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } go for the paranoid network programmer slideshare.net/feyeleanor 11
- 12. package mai n import ( . "fmt " ."net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } ) ListenAndServe(ADDRESS, nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 12
- 13. package mai n import ( . "fmt " ."net/http " ) const MESSAGE = "hello world " const ADDRESS = ":1024 " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, MESSAGE ) } ) ListenAndServe(ADDRESS, nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 13
- 14. https 14 go for theparanoid network programmer slideshare.net/feyeleanor
- 15. package mai n import ( . "fmt " ."net/http " ) const ADDRESS = ":1025 " func main() { message := "hello world " HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, message ) } ) ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 15
- 16. package mai n import ( . "fmt " ."net/http " ) const ADDRESS = ":1025 " func main() { message := "hello world " HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, message ) }) ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 16
- 17. package mai n import ( . "fmt " ."net/http " ) const ADDRESS = ":1025 " func main() { message := "hello world" HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, message ) } ) ListenAndServeTLS(ADDRESS, "cert.pem", "key.pem", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 17
- 18. multiple http servers 18 gofor the paranoid network programmer slideshare.net/feyeleanor
- 19. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool ) go func() { ListenAndServe(":1024", nil ) done <- tru e }( ) ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- don e } go for the paranoid network programmer slideshare.net/feyeleanor 19
- 20. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool ) go func() { ListenAndServe(":1024", nil ) done <- tru e }( ) ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- don e } go for the paranoid network programmer slideshare.net/feyeleanor 20
- 21. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool ) go func() { ListenAndServe(":1024", nil ) done <- tru e }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- don e } go for the paranoid network programmer slideshare.net/feyeleanor 21
- 22. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool ) go func() { ListenAndServe(":1024", nil ) done <- tru e }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- don e } go for the paranoid network programmer slideshare.net/feyeleanor 22
- 23. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool) go func() { ListenAndServe(":1024", nil ) done <- tru e }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- done } go for the paranoid network programmer slideshare.net/feyeleanor 23
- 24. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool) go func() { ListenAndServe(":1024", nil ) done <- true }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- done } go for the paranoid network programmer slideshare.net/feyeleanor 24
- 25. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool) go func() { ListenAndServe(":1024", nil ) done <- true }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- done } go for the paranoid network programmer slideshare.net/feyeleanor 25
- 26. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) done := make(chan bool) go func() { ListenAndServe(":1024", nil ) done <- true }() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) <- done } go for the paranoid network programmer slideshare.net/feyeleanor 26
- 27. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) Spawn ( func() { ListenAndServe(":1024", nil) } , func() { ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) } , ) } go for the paranoid network programmer slideshare.net/feyeleanor 27
- 28. package mai n import ."fmt " import . "net/http " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) Spawn(func() { ListenAndServe(":1024", nil) } ) Spawn(func() { ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil) }) } go for the paranoid network programmer slideshare.net/feyeleanor 28
- 29. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for l := len(f); l > 0; l-- { <- don e } } go for the paranoid network programmer slideshare.net/feyeleanor 29
- 30. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for l := len(f); l > 0; l-- { <- don e } } go for the paranoid network programmer slideshare.net/feyeleanor 30
- 31. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for l := len(f); l > 0; l-- { <- done } } go for the paranoid network programmer slideshare.net/feyeleanor 31
- 32. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for _, _ = range f { <- done } } go for the paranoid network programmer slideshare.net/feyeleanor 32
- 33. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for range f { <- done } } go for the paranoid network programmer slideshare.net/feyeleanor 33
- 34. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) <- done } } go for the paranoid network programmer slideshare.net/feyeleanor 34
- 35. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- true }(s ) } for range f { <- done } } go for the paranoid network programmer slideshare.net/feyeleanor 35
- 36. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server() done <- true }(s) } for range f { <- don e } } go for the paranoid network programmer slideshare.net/feyeleanor 36
- 37. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server( ) done <- tru e }(s ) } for range f { <- don e } } go for the paranoid network programmer slideshare.net/feyeleanor 37
- 38. package mai n func Spawn(f...func()) { done := make(chan bool ) for _, s := range f { go func(server func()) { server() done <- true }(s) } for range f { <- don e } } go for the paranoid network programmer slideshare.net/feyeleanor 38
- 39. waitgroups 39 go for theparanoid network programmer slideshare.net/feyeleanor
- 40. package mai n import ."net/http " import "sync " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) {} ) var servers sync.WaitGrou p servers.Add(1 ) go func() { defer servers.Done( ) ListenAndServe(":1024", nil ) }( ) servers.Add(1 ) go func() { defer servers.Done( ) ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) }( ) servers.Wait( ) } go for the paranoid network programmer slideshare.net/feyeleanor 40
- 41. package mai n import ."net/http " import "sync " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) {} ) var servers sync.WaitGroup servers.Add(1 ) go func() { defer servers.Done( ) ListenAndServe(":1024", nil ) }( ) servers.Add(1 ) go func() { defer servers.Done( ) ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) }( ) servers.Wait( ) } go for the paranoid network programmer slideshare.net/feyeleanor 41
- 42. package mai n import ."net/http " import "sync " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) {} ) var servers sync.WaitGrou p servers.Add(1) go func() { defer servers.Done() ListenAndServe(":1024", nil ) }( ) servers.Add(1) go func() { defer servers.Done() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) }( ) servers.Wait() } go for the paranoid network programmer slideshare.net/feyeleanor 42
- 43. package mai n import ."net/http " import "sync " func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) {} ) var servers sync.WaitGroup servers.Add(1) go func() { defer servers.Done() ListenAndServe(":1024", nil ) }() servers.Add(1) go func() { defer servers.Done() ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) }() servers.Wait() } go for the paranoid network programmer slideshare.net/feyeleanor 43
- 44. package mai n import ( . "fmt " ."net/http " "sync " ) var servers sync.WaitGrou p func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) Spawn(func() { ListenAndServe(":1024", nil) } ) Spawn(func() { ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) } ) servers.Wait( ) } go for the paranoid network programmer slideshare.net/feyeleanor 44
- 45. package mai n import ( . "fmt " ."net/http " "sync " ) var servers sync.WaitGrou p func main() { HandleFunc("/hello", func(w ResponseWriter, r *Request) { w.Header().Set("Content-Type", "text/plain" ) Fprintf(w, "hello world" ) } ) Spawn(func() { ListenAndServe(":1024", nil) } ) Spawn(func() { ListenAndServeTLS(":1025", "cert.pem", "key.pem", nil ) } ) servers.Wait() } go for the paranoid network programmer slideshare.net/feyeleanor 45
- 46. package mai n func Spawn(f...func()) { for _, s := range f { servers.Add(1 ) go func(server func()) { defer servers.Done( ) server( ) }(s ) } } go for the paranoid network programmer slideshare.net/feyeleanor 46
- 47. package mai n func Spawn(f...func()) { for _, s := range f { servers.Add(1) go func(server func()) { defer servers.Done() server( ) }(s ) } } go for the paranoid network programmer slideshare.net/feyeleanor 47
- 48. tcp server 48 go forthe paranoid network programmer slideshare.net/feyeleanor
- 49. package mai n import ."fmt " import "net " func main() { if listener, e := net.Listen("tcp", ":1024"); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 49
- 50. package mai n import ."fmt " import "net " func main() { if listener, e := net.Listen("tcp", ":1024"); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 50
- 51. package mai n import ."fmt " import "net " func main() { if listener, e := net.Listen("tcp", ":1024"); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 51
- 52. package mai n import ."fmt " import "net " func main() { if listener, e := net.Listen("tcp", ":1024"); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 52
- 53. package mai n import ."fmt " import "net " func main() { Listen("tcp", ":1024", func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) } ) } func Listen(p, a string, f func(net.Conn)) (e error) { var listener net.Listene r if listener, e = net.Listen(p, a); e == nil { for { if connection, e := listener.Accept(); e == nil { go f(connection ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 53
- 54. package mai n import ."fmt " import "net " func main() { Listen("tcp", ":1024", func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) } ) } func Listen(p, a string, f func(net.Conn)) (e error) { var listener net.Listene r if listener, e = net.Listen(p, a); e == nil { for { if connection, e := listener.Accept(); e == nil { go f(connection ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 54
- 55. package mai n import ."fmt " import "net " func main() { Listen("tcp", ":1024", func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) } ) } func Listen(p, a string, f func(net.Conn)) (e error) { var listener net.Listener if listener, e = net.Listen(p, a); e == nil { for { if connection, e := listener.Accept(); e == nil { go f(connection ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 55
- 56. package mai n import ."fmt " import "net " func main() { Listen("tcp", ":1024", func(c net.Conn) { defer c.Close( ) Fprintln(c, "hello world" ) } ) } func Listen(p, a string, f func(net.Conn)) (e error) { var listener net.Listener if listener, e = net.Listen(p, a); e == nil { for { if connection, e := listener.Accept(); e == nil { go f(connection ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 56
- 57. tcp client 57 go forthe paranoid network programmer slideshare.net/feyeleanor
- 58. package mai n import "bufio " import. "fmt " import "net " func main() { if c, e := net.Dial("tcp", ":1024"); e == nil { defer c.Close( ) if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 58
- 59. package mai n import "bufio " import. "fmt " import "net " func main() { if c, e := net.Dial("tcp", ":1024"); e == nil { defer c.Close() if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 59
- 60. package mai n import "bufio " import. "fmt " import "net " func main() { if c, e := net.Dial("tcp", ":1024"); e == nil { defer c.Close( ) if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 60
- 61. package mai n import "bufio " import. "fmt " import "net " func main() { if c, e := net.Dial("tcp", ":1024"); e == nil { defer c.Close( ) if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 61
- 62. package mai n import "bufio " import. "fmt " import "net " func main() { if c, e := net.Dial("tcp", ":1024"); e == nil { defer c.Close( ) if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 62
- 63. package mai n import "bufio " import. "fmt " import "net " func main() { Dial("tcp", ":1024", func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func Dial(p, a string, f func(net.Conn)) (e error) { var c net.Con n if c, e = net.Dial(p, a); e == nil { defer c.Close( ) f(c ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 63
- 64. package mai n import "bufio " import. "fmt " import "net " func main() { Dial("tcp", ":1024", func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func Dial(p, a string, f func(net.Conn)) (e error) { var c net.Con n if c, e = net.Dial(p, a); e == nil { defer c.Close( ) f(c ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 64
- 65. package mai n import "bufio " import. "fmt " import "net " func main() { Dial("tcp", ":1024", func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func Dial(p, a string, f func(net.Conn)) (e error) { var c net.Con n if c, e = net.Dial(p, a); e == nil { defer c.Close() f(c ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 65
- 66. tcp/tls server 66 go forthe paranoid network programmer slideshare.net/feyeleanor
- 67. package mai n import "crypto/rand " import"crypto/tls " import . "fmt " func main() { Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) { Fprintln(c, "hello world" ) } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , Rand: rand.Reader , } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 67
- 68. package mai n import "crypto/rand " import"crypto/tls " import . "fmt " func main() { Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) { Fprintln(c, "hello world" ) } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , Rand: rand.Reader , } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 68
- 69. package mai n import "crypto/rand " import"crypto/tls " import . "fmt " func main() { Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) { Fprintln(c, "hello world" ) } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , Rand: rand.Reader , } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 69
- 70. package mai n import "crypto/rand " import"crypto/tls " import . "fmt " func main() { Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) { Fprintln(c, "hello world" ) } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config{ Certificates: []tls.Certificate{ cert } , Rand: rand.Reader , } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 70
- 71. package mai n import "crypto/rand " import"crypto/tls " import . "fmt " func main() { Listen(":1025", ConfigTLS("scert", "skey"), func(c *tls.Conn) { Fprintln(c, "hello world" ) } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config{ Certificates: []tls.Certificate{ cert } , Rand: rand.Reader , } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 71
- 72. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 72
- 73. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 73
- 74. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 74
- 75. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 75
- 76. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 76
- 77. package mai n import "crypto/tls " funcListen(a string, conf *tls.Config, f func(*tls.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c *tls.Conn) { defer c.Close( ) f(c ) }(connection.(*tls.Conn) ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 77
- 78. package mai n import "crypto/tls " import"net " func Listen(a string, conf *tls.Config, f func(net.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) f(c ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 78
- 79. package mai n import "crypto/tls " import"net " func Listen(a string, conf *tls.Config, f func(net.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if connection, e := listener.Accept(); e == nil { go func(c net.Conn) { defer c.Close( ) f(c ) }(connection ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 79
- 80. package mai n import "crypto/tls " import"net " func Listen(a string, conf *tls.Config, f func(net.Conn)) { if listener, e := tls.Listen("tcp", a, conf); e == nil { for { if c, e := listener.Accept(); e == nil { go Handle(c, f ) } } } } func Handle(c net.Conn, f func(net.Conn)) { defer c.Close( ) f(c ) } go for the paranoid network programmer slideshare.net/feyeleanor 80
- 81. tcp/tls client 81 go forthe paranoid network programmer slideshare.net/feyeleanor
- 82. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , InsecureSkipVerify: true , } } go for the paranoid network programmer slideshare.net/feyeleanor 82
- 83. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , InsecureSkipVerify: true , } } go for the paranoid network programmer slideshare.net/feyeleanor 83
- 84. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config { Certificates: []tls.Certificate{ cert } , InsecureSkipVerify: true , } } go for the paranoid network programmer slideshare.net/feyeleanor 84
- 85. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config{ Certificates: []tls.Certificate{ cert } , InsecureSkipVerify: true , } } go for the paranoid network programmer slideshare.net/feyeleanor 85
- 86. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func ConfigTLS(c, k string) (r *tls.Config) { if cert, e := tls.LoadX509KeyPair(c, k); e == nil { r = &tls.Config{ Certificates: []tls.Certificate{ cert } , InsecureSkipVerify: true , } } go for the paranoid network programmer slideshare.net/feyeleanor 86
- 87. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func Dial(a string, conf *tls.Config, f func(net.Conn)) { if c, e := tls.Dial("tcp", a, conf); e == nil { defer c.Close( ) f(c ) } } go for the paranoid network programmer slideshare.net/feyeleanor 87
- 88. package mai n import "bufio " import"crypto/tls " import . "fmt " import "net " func main() { Dial(":1025", ConfigTLS("ccert", "ckey"), func(c net.Conn) { if m, e := bufio.NewReader(c).ReadString('n'); e == nil { Printf(m ) } } ) } func Dial(a string, conf *tls.Config, f func(net.Conn)) { if c, e := tls.Dial("tcp", a, conf); e == nil { defer c.Close( ) f(c ) } } go for the paranoid network programmer slideshare.net/feyeleanor 88
- 89. udp serve 89 go forthe paranoid network programmer slideshare.net/feyeleanor
- 90. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 90
- 91. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 91
- 92. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 92
- 93. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 93
- 94. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 94
- 95. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 95
- 96. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 96
- 97. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 97
- 98. package mai n import "net " funcmain() { HELLO_WORLD := []byte("Hello Worldn" ) Listen(":1024", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { c.WriteToUDP(HELLO_WORLD, a ) } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := conn.ReadFromUDP(b); e == nil { go f(conn, client, b[:n] ) } } } } } go for the paranoid network programmer slideshare.net/feyeleanor 98
- 99. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 99
- 100. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 100
- 101. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 101
- 102. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 102
- 103. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 103
- 104. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 104
- 105. package mai n import "net " funcListen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.ListenUDP("udp", address); e == nil { ServeUDP(conn, func(c *net.UDPAddr, b []byte) { f(conn, c, b ) }) } } } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { for b := make([]byte, 1024); ; b = make([]byte, 1024) { if n, client, e := c.ReadFromUDP(b); e == nil { go f(client, b[:n] ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 105
- 106. udp request 106 go forthe paranoid network programmer slideshare.net/feyeleanor
- 107. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 107
- 108. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 108
- 109. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 109
- 110. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 110
- 111. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 111
- 112. package mai n import "bufio " import. "fmt " import "net " func main() { Dial(":1024", func(conn net.Conn) { if _, e := conn.Write([]byte("n")); e == nil { if m, e := bufio.NewReader(conn).ReadString('n'); e == nil { Printf("%v", m ) } } } ) } func Dial(a string, f func(net.Conn)) { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) f(conn ) } go for the paranoid network programmer slideshare.net/feyeleanor 112
- 113. aes encrypt 113 go forthe paranoid network programmer slideshare.net/feyeleanor
- 114. go for theparanoid network programmer slideshare.net/feyeleanor 114 package mai n import "net " const AES_KEY = "0123456789012345 " func main() { Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { if m, e := Encrypt("Hello World", AES_KEY); e == nil { c.WriteToUDP(m, a ) } } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { // see udp serv e } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { // see udp serv e }
- 115. go for theparanoid network programmer slideshare.net/feyeleanor 115 package mai n import "net " const AES_KEY = "0123456789012345" func main() { Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { if m, e := Encrypt("Hello World", AES_KEY); e == nil { c.WriteToUDP(m, a ) } } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { // see udp serv e } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { // see udp serv e }
- 116. go for theparanoid network programmer slideshare.net/feyeleanor 116 package mai n import "net " const AES_KEY = "0123456789012345" func main() { Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { if m, e := Encrypt("Hello World", AES_KEY); e == nil { c.WriteToUDP(m, a ) } } ) } func Listen(a string, f func(*net.UDPConn, *net.UDPAddr, []byte)) { // see udp serv e } func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) { // see udp serv e }
- 117. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)…) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 117
- 118. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)…) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 118
- 119. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)…) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 119
- 120. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)…) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 120
- 121. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)…) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 121
- 122. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)...) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 122
- 123. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)...) // padding with NUL!!!! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 123
- 124. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Block if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)...) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 124
- 125. package mai n import "crypto/aes " import"crypto/cipher " func Encrypt(m, k string) (o []byte, e error) { if o, e = PaddedBuffer([]byte(m)); e == nil { var b cipher.Block if b, e = aes.NewCipher([]byte(k)); e == nil { o = CryptBlocks(o, b ) } } retur n } func PaddedBuffer(m []byte) (b []byte, e error) { b = append(b, m... ) if p := len(b) % aes.BlockSize; p != 0 { p = aes.BlockSize - p b = append(b, make([]byte, p)...) // padding with NUL!!! ! } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 125
- 126. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 126
- 127. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 127
- 128. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 128
- 129. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 129
- 130. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 130
- 131. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 131
- 132. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 132
- 133. package mai n import "crypto/aes " import"crypto/cipher " func CryptBlocks(b []byte, c cipher.Block) (o []byte) { o = make([]byte, aes.BlockSize + len(b) ) copy(o, IV() ) enc := cipher.NewCBCEncrypter(c, o[:aes.BlockSize] ) enc.CryptBlocks(o[aes.BlockSize:], b ) retur n } func IV() (b []byte) { b = make([]byte, aes.BlockSize ) if _, e := rand.Read(b); e != nil { panic(e ) } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 133
- 134. aes decrypt 134 go forthe paranoid network programmer slideshare.net/feyeleanor
- 135. package mai n import ."fmt " import "net " const AES_KEY = "0123456789012345 " func main() { Dial(":1025", func(conn net.Conn) { RequestMessage(conn, func(m []byte) { if m, e := Decrypt(m, AES_KEY); e == nil { Printf("%sn", m ) } } ) } ) } func Dial(a string, f func(net.Conn)) { // see udp reques t } go for the paranoid network programmer slideshare.net/feyeleanor 135
- 136. package mai n import ."fmt " import "net " const AES_KEY = "0123456789012345 " func main() { Dial(":1025", func(conn net.Conn) { RequestMessage(conn, func(m []byte) { if m, e := Decrypt(m, AES_KEY); e == nil { Printf("%sn", m ) } } ) } ) } func Dial(a string, f func(net.Conn)) { // see udp reques t } go for the paranoid network programmer slideshare.net/feyeleanor 136
- 137. package mai n import ."fmt " import "net " const AES_KEY = "0123456789012345" func main() { Dial(":1025", func(conn net.Conn) { RequestMessage(conn, func(m []byte) { if m, e := Decrypt(m, AES_KEY); e == nil { Printf("%sn", m ) } } ) } ) } func Dial(a string, f func(net.Conn)) { // see udp reques t } go for the paranoid network programmer slideshare.net/feyeleanor 137
- 138. package mai n import "net " funcRequestMessage(conn net.Conn, f func([]byte)) (e error) { if _, e = conn.Write([]byte("n")); e == nil { m := make([]byte, 1024 ) var n in t if n, e = conn.Read(m); e == nil { f(m[:n] ) } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 138
- 139. package mai n import "net " funcRequestMessage(conn net.Conn, f func([]byte)) (e error) { if _, e = conn.Write([]byte("n")); e == nil { m := make([]byte, 1024 ) var n in t if n, e = conn.Read(m); e == nil { f(m[:n] ) } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 139
- 140. package mai n import "net " funcRequestMessage(conn net.Conn, f func([]byte)) (e error) { if _, e = conn.Write([]byte("n")); e == nil { m := make([]byte, 1024 ) var n in t if n, e = conn.Read(m); e == nil { f(m[:n] ) } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 140
- 141. package mai n import "net " funcRequestMessage(conn net.Conn, f func([]byte)) (e error) { if _, e = conn.Write([]byte("n")); e == nil { m := make([]byte, 1024 ) var n in t if n, e = conn.Read(m); e == nil { f(m[:n] ) } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 141
- 142. package mai n import "net " funcRequestMessage(conn net.Conn, f func([]byte)) (e error) { if _, e = conn.Write([]byte("n")); e == nil { m := make([]byte, 1024 ) var n in t if n, e = conn.Read(m); e == nil { f(m[:n] ) } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 142
- 143. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 143
- 144. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 144
- 145. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 145
- 146. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 146
- 147. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 147
- 148. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 148
- 149. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 149
- 150. package mai n import "crypto/cipher " import"crypto/aes " func Decrypt(m []byte, k string) (r []byte, e error) { var b cipher.Bloc k if b, e = aes.NewCipher([]byte(k)); e == nil { var iv []byt e iv, m = Unpack(m ) c := cipher.NewCBCDecrypter(b, iv ) r = make([]byte, len(m) ) c.CryptBlocks(r, m ) } retur n } func Unpack(m []byte) (iv, r []byte) { return m[:aes.BlockSize], m[aes.BlockSize: ] } go for the paranoid network programmer slideshare.net/feyeleanor 150
- 151. rsa encrypt 151 go forthe paranoid network programmer slideshare.net/feyeleanor
- 152. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 152
- 153. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKey if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 153
- 154. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 154
- 155. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 155
- 156. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 156
- 157. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 157
- 158. package mai n import ."bytes " import "crypto/rsa " import "encoding/gob " import "net " func main() { HELLO_WORLD := []byte("Hello World" ) RSA_LABEL := []byte("served" ) Listen(":1025", func(c *net.UDPConn, a *net.UDPAddr, b []byte) { var key rsa.PublicKe y if e := gob.NewDecoder(NewBuffer(b)).Decode(&key); e == nil { if m, e := Encrypt(&key, HELLO_WORLD, RSA_LABEL); e == nil { c.WriteToUDP(m, a ) } } retur n } ) } go for the paranoid network programmer slideshare.net/feyeleanor 158
- 159. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) { return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 159
- 160. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) { return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 160
- 161. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) { return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 161
- 162. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) { return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 162
- 163. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Encrypt(key *rsa.PublicKey, m, l []byte) ([]byte, error) { return rsa.EncryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 163
- 164. rsa decrypt 164 go forthe paranoid network programmer slideshare.net/feyeleanor
- 165. package mai n import "crypto/rsa " import. "fmt " import "net " func main() { Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) { if m, e := ReadStream(c); e == nil { if m, e := Decrypt(k, m, []byte("served")); e == nil { Println(string(m) ) } } } ) } go for the paranoid network programmer slideshare.net/feyeleanor 165
- 166. package mai n import "crypto/rsa " import. "fmt " import "net " func main() { Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) { if m, e := ReadStream(c); e == nil { if m, e := Decrypt(k, m, []byte("served")); e == nil { Println(string(m) ) } } } ) } go for the paranoid network programmer slideshare.net/feyeleanor 166
- 167. package mai n import "crypto/rand " import"crypto/rsa " import "crypto/sha1 " func Decrypt(key *rsa.PrivateKey, m, l []byte) ([]byte, error) { return rsa.DecryptOAEP(sha1.New(), rand.Reader, key, m, l ) } go for the paranoid network programmer slideshare.net/feyeleanor 167
- 168. package mai n import "crypto/rsa " import. "fmt " import "net " func main() { Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) { if m, e := ReadStream(c); e == nil { if m, e := Decrypt(k, m, []byte("served")); e == nil { Println(string(m) ) } } } ) } go for the paranoid network programmer slideshare.net/feyeleanor 168
- 169. package mai n import "crypto/rsa " import. "fmt " import "net " func main() { Dial(":1025", "ckey", func(c *net.UDPConn, k *rsa.PrivateKey) { if m, e := ReadStream(c); e == nil { if m, e := Decrypt(k, m, []byte("served")); e == nil { Println(string(m) ) } } } ) } go for the paranoid network programmer slideshare.net/feyeleanor 169
- 170. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 170
- 171. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 171
- 172. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 172
- 173. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 173
- 174. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 174
- 175. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 175
- 176. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 176
- 177. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 177
- 178. package mai n import "crypto/rsa " import"crypto/x509 " import "encoding/pem " import "io/ioutil " func LoadPrivateKey(file string) (r *rsa.PrivateKey, e error) { if file, e := ioutil.ReadFile(file); e == nil { if block, _ := pem.Decode(file); block != nil { if block.Type == "RSA PRIVATE KEY" { r, e = x509.ParsePKCS1PrivateKey(block.Bytes ) } } } retur n } go for the paranoid network programmer slideshare.net/feyeleanor 178
- 179. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 179
- 180. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 180
- 181. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k ) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 181
- 182. package mai n import "bytes " import“crypto/rsa " import "encoding/gob " import "net " func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) { var b bytes.Buffe r if e := gob.NewEncoder(&b).Encode(k); e == nil { if _, e = c.Write(b.Bytes()); e == nil { f( ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 182
- 183. package mai n import "bytes " import“crypto/rsa " import "encoding/gob " import "net " func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) { var b bytes.Buffe r if e := gob.NewEncoder(&b).Encode(k); e == nil { if _, e = c.Write(b.Bytes()); e == nil { f( ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 183
- 184. package mai n import "bytes " import“crypto/rsa " import "encoding/gob " import "net " func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) { var b bytes.Buffe r if e := gob.NewEncoder(&b).Encode(k); e == nil { if _, e = c.Write(b.Bytes()); e == nil { f( ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 184
- 185. package mai n import "crypto/rsa " import. "fmt " import "net " func Dial(a, file string, f func(*net.UDPConn, *rsa.PrivateKey)) { if k, e := LoadPrivateKey(file); e == nil { if address, e := net.ResolveUDPAddr("udp", a); e == nil { if conn, e := net.DialUDP("udp", nil, address); e == nil { defer conn.Close( ) SendKey(conn, k.PublicKey, func() { f(conn, k) } ) } } } } go for the paranoid network programmer slideshare.net/feyeleanor 185
- 186. serving websockets 186 go forthe paranoid network programmer slideshare.net/feyeleanor
- 187. ws_hello.htm l <!DOCTYPE html > <html > <head > <meta charset='UTF-8'/ > <title>WEBSOCKET HELLO</title > <script src="js"></script > </head > <body></body > </html > ws_hello.j s window.onload = function() { var socket = new WebSocket("ws://localhost:3000/hello") ; socket.onmessage = m => { div = document.createElement("div") ; div.innerText = JSON.parse(m.data) ; document.body.append(div) ; } ; } go for the paranoid network programmer slideshare.net/feyeleanor 187
- 188. ws_hello.htm l <!DOCTYPE html > <html > <head > <meta charset='UTF-8'/ > <title>WEBSOCKET HELLO</title > <script src="js"></script > </head > <body></body > </html > ws_hello.j s window.onload = function() { var socket = new WebSocket("ws://localhost:3000/hello") ; socket.onmessage = m => { div = document.createElement("div") ; div.innerText = JSON.parse(m.data) ; document.body.append(div) ; } ; } go for the paranoid network programmer slideshare.net/feyeleanor 188
- 189. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type ) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 189
- 190. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type ) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 190
- 191. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 191
- 192. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type ) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 192
- 193. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type ) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 193
- 194. package mai n import "fmt " import"golang.org/x/net/websocket " import "io/ioutil " import "net/http " func ServeFile(route, name, mime_type string) { b, _ := ioutil.ReadFile(name ) http.HandleFunc(route, func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", mime_type ) fmt.Fprint(w, string(b) ) } ) } func main() { http.Handle("/hello", websocket.Handler(func(ws *websocket.Conn) { websocket.JSON.Send(ws, "Hello" ) }) ) ServeFile("/", "ws_hello.html", "text/html" ) ServeFile("/js", "ws_hello.js", "application/javascript" ) http.ListenAndServe(":3000", nil ) } go for the paranoid network programmer slideshare.net/feyeleanor 194
- 195. accessing websockets 195 go forthe paranoid network programmer slideshare.net/feyeleanor
- 196. package mai n import "fmt " import"golang.org/x/net/websocket " const SERVER = "ws://localhost:3000/hello " const ADDRESS = "http://localhost/ " func main() { if ws, e := websocket.Dial(SERVER, "", ADDRESS); e == nil { var s strin g if e := websocket.JSON.Receive(ws, &s); e == nil { fmt.Println(s ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 196
- 197. package mai n import "fmt " import"golang.org/x/net/websocket " const SERVER = "ws://localhost:3000/hello " const ADDRESS = "http://localhost/ " func main() { if ws, e := websocket.Dial(SERVER, "", ADDRESS); e == nil { var s strin g if e := websocket.JSON.Receive(ws, &s); e == nil { fmt.Println(s ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 197
- 198. package mai n import "fmt " import"golang.org/x/net/websocket " const SERVER = "ws://localhost:3000/hello " const ADDRESS = "http://localhost/ " func main() { if ws, e := websocket.Dial(SERVER, "", ADDRESS); e == nil { var s string if e := websocket.JSON.Receive(ws, &s); e == nil { fmt.Println(s ) } } } go for the paranoid network programmer slideshare.net/feyeleanor 198
- 199. twitter://@feyeleanor go for theparanoid network programmer slideshare.net/feyeleanor