A networking and cryptography primer for #golang programmers. Teaches a reasonable subset of the language.

1. go
for the paranoid network programmer
@feyeleanor
1go for the paranoid network programmer slideshare.net/feyeleanor

2. twitter://@feyeleanor
go for the paranoid network programmer slideshare.net/feyeleanor

3. high voltage
networking
concurrency
cryptography
go for the paranoid network programmer slideshare.net/feyeleanor

4. http
4go for the paranoid network programmer slideshare.net/feyeleanor

5. package main
import (
. "fmt"
"net/http"
)
const MESSAGE = "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/feyeleanor5

6. package main
import (
. "fmt"
"net/http"
)
const MESSAGE = "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/feyeleanor6

7. package main
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/feyeleanor7

8. package main
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/feyeleanor8

9. package main
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/feyeleanor9

10. package main
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/feyeleanor10

11. package main
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/feyeleanor11

12. package main
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/feyeleanor12

13. package main
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/feyeleanor13

14. package main
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/feyeleanor14

15. https
15go for the paranoid network programmer slideshare.net/feyeleanor

16. package main
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/feyeleanor16

17. package main
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/feyeleanor17

18. package main
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/feyeleanor18

19. package main
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/feyeleanor19

20. multiple http servers
20go for the paranoid network programmer slideshare.net/feyeleanor

21. package main
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/feyeleanor21

22. package main
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/feyeleanor22

23. package main
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/feyeleanor23

24. package main
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/feyeleanor24

25. package main
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/feyeleanor25

26. package main
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/feyeleanor26

27. package main
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/feyeleanor27

28. package main
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/feyeleanor28

29. package main
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/feyeleanor29

30. package main
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/feyeleanor30

31. package main
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/feyeleanor31

32. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the paranoid network programmer slideshare.net/feyeleanor32

33. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the paranoid network programmer slideshare.net/feyeleanor33

34. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
}
for l := len(f); l > 0; l-- {
<- done
}
}
go for the paranoid network programmer slideshare.net/feyeleanor34

35. package main
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/feyeleanor35

36. package main
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/feyeleanor36

37. package main
func Spawn(f ...func()) {
done := make(chan bool)
for _, s := range f {
go func(server func()) {
server()
done <- true
}(s)
<- done
}
}
go for the paranoid network programmer slideshare.net/feyeleanor37

38. package main
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/feyeleanor38

39. package main
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/feyeleanor39

40. package main
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/feyeleanor40

41. package main
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/feyeleanor41

42. waitgroups
42go for the paranoid network programmer slideshare.net/feyeleanor

43. package main
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/feyeleanor43

44. package main
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/feyeleanor44

45. package main
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/feyeleanor45

46. package main
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/feyeleanor46

47. package main
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/feyeleanor47

48. package main
import (
. "fmt"
. "net/http"
"sync"
)
var servers sync.WaitGroup
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/feyeleanor48

49. package main
import (
. "fmt"
. "net/http"
"sync"
)
var servers sync.WaitGroup
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/feyeleanor49

50. package main
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/feyeleanor50

51. package main
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/feyeleanor51

52. tcp server
52go for the paranoid network programmer slideshare.net/feyeleanor

53. package main
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/feyeleanor53

54. package main
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/feyeleanor54

55. package main
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/feyeleanor55

56. package main
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/feyeleanor56

57. package main
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/feyeleanor57

58. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor58

59. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor59

60. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor60

61. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor61

62. tcp client
62go for the paranoid network programmer slideshare.net/feyeleanor

63. package main
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/feyeleanor63

64. package main
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/feyeleanor64

65. package main
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/feyeleanor65

66. package main
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/feyeleanor66

67. package main
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/feyeleanor67

68. package main
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/feyeleanor68

69. package main
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.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor69

70. package main
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.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor70

71. package main
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.Conn
if c, e = net.Dial(p, a); e == nil {
defer c.Close()
f(c)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor71

72. tcp/tls server
72go for the paranoid network programmer slideshare.net/feyeleanor

73. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor73

74. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor74

75. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor75

76. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor76

77. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor77

78. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor78

79. package main
import "crypto/tls"
func Listen(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/feyeleanor79

80. package main
import "crypto/tls"
func Listen(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/feyeleanor80

81. package main
import "crypto/tls"
func Listen(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/feyeleanor81

82. package main
import "crypto/tls"
func Listen(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/feyeleanor82

83. package main
import "crypto/tls"
func Listen(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/feyeleanor83

84. package main
import "crypto/tls"
func Listen(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/feyeleanor84

85. package main
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/feyeleanor85

86. package main
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/feyeleanor86

87. package main
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/feyeleanor87

88. tcp/tls client
88go for the paranoid network programmer slideshare.net/feyeleanor

89. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor89

90. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor90

91. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor91

92. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor92

93. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor93

94. package main
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,
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor94

95. package main
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/feyeleanor95

96. package main
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/feyeleanor96

97. udp serve
97go for the paranoid network programmer slideshare.net/feyeleanor

98. package main
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/feyeleanor98

99. package main
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/feyeleanor99

100. package main
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/feyeleanor100

101. package main
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/feyeleanor101

102. package main
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/feyeleanor102

103. package main
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/feyeleanor103

104. package main
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/feyeleanor104

105. package main
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/feyeleanor105

106. package main
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/feyeleanor106

107. package main
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/feyeleanor107

108. package main
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/feyeleanor108

109. package main
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/feyeleanor109

110. package main
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/feyeleanor110

111. package main
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/feyeleanor111

112. package main
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/feyeleanor112

113. package main
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/feyeleanor113

114. package main
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/feyeleanor114

115. udp request
115go for the paranoid network programmer slideshare.net/feyeleanor

116. package main
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/feyeleanor116

117. package main
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/feyeleanor117

118. package main
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/feyeleanor118

119. package main
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/feyeleanor119

120. package main
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/feyeleanor120

121. package main
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/feyeleanor121

122. package main
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/feyeleanor122

123. aes encrypt
123go for the paranoid network programmer slideshare.net/feyeleanor

124. go for the paranoid network programmer slideshare.net/feyeleanor124
package main
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 serve
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) {
// see udp serve
}

125. go for the paranoid network programmer slideshare.net/feyeleanor125
package main
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 serve
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) {
// see udp serve
}

126. go for the paranoid network programmer slideshare.net/feyeleanor126
package main
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 serve
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) {
// see udp serve
}

127. go for the paranoid network programmer slideshare.net/feyeleanor127
package main
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 serve
}
func ServeUDP(c *net.UDPConn, f func(*net.UDPAddr, []byte)) {
// see udp serve
}

128. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor128

129. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor129

130. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor130

131. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor131

132. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor132

133. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor133

134. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor134

135. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor135

136. package main
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)
}
}
return
}
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!!!!
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor136

137. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor137

138. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor138

139. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor139

140. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor140

141. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor141

142. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor142

143. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor143

144. package main
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)
return
}
func IV() (b []byte) {
b = make([]byte, aes.BlockSize)
if _, e := rand.Read(b); e != nil {
panic(e)
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor144

145. aes decrypt
145go for the paranoid network programmer slideshare.net/feyeleanor

146. package main
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)) {
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/feyeleanor146

147. package main
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 request
}
go for the paranoid network programmer slideshare.net/feyeleanor147

148. package main
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 request
}
go for the paranoid network programmer slideshare.net/feyeleanor148

149. package main
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 request
}
go for the paranoid network programmer slideshare.net/feyeleanor149

150. package main
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 int
if n, e = conn.Read(m); e == nil {
f(m[:n])
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor150

151. package main
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 int
if n, e = conn.Read(m); e == nil {
f(m[:n])
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor151

152. package main
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 int
if n, e = conn.Read(m); e == nil {
f(m[:n])
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor152

153. package main
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 int
if n, e = conn.Read(m); e == nil {
f(m[:n])
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor153

154. package main
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 int
if n, e = conn.Read(m); e == nil {
f(m[:n])
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor154

155. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor155

156. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor156

157. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor157

158. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor158

159. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor159

160. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor160

161. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor161

162. package main
import "crypto/cipher"
import "crypto/aes"
func Decrypt(m []byte, k string) (r []byte, e error) {
var b cipher.Block
if b, e = aes.NewCipher([]byte(k)); e == nil {
var iv []byte
iv, m = Unpack(m)
c := cipher.NewCBCDecrypter(b, iv)
r = make([]byte, len(m))
c.CryptBlocks(r, m)
}
return
}
func Unpack(m []byte) (iv, r []byte){
return m[:aes.BlockSize], m[aes.BlockSize:]
}
go for the paranoid network programmer slideshare.net/feyeleanor162

163. rsa encrypt
163go for the paranoid network programmer slideshare.net/feyeleanor

164. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor164

165. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor165

166. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor166

167. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor167

168. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor168

169. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor169

170. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor170

171. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor171

172. package main
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)
}
}
return
})
}
go for the paranoid network programmer slideshare.net/feyeleanor172

173. package main
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/feyeleanor173

174. package main
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/feyeleanor174

175. package main
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/feyeleanor175

176. package main
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/feyeleanor176

177. package main
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/feyeleanor177

178. rsa decrypt
178go for the paranoid network programmer slideshare.net/feyeleanor

179. package main
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/feyeleanor179

180. package main
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/feyeleanor180

181. package main
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/feyeleanor181

182. package main
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/feyeleanor182

183. package main
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/feyeleanor183

184. package main
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/feyeleanor184

185. package main
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/feyeleanor185

186. package main
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/feyeleanor186

187. package main
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/feyeleanor187

188. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor188

189. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor189

190. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor190

191. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor191

192. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor192

193. package main
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)
}
}
}
return
}
go for the paranoid network programmer slideshare.net/feyeleanor193

194. package main
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/feyeleanor194

195. package main
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/feyeleanor195

196. package main
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/feyeleanor196

197. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
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/feyeleanor197

198. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
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/feyeleanor198

199. package main
import "bytes"
import “crypto/rsa"
import "encoding/gob"
import "net"
func SendKey(c *net.UDPConn, k rsa.PublicKey, f func()) {
var b bytes.Buffer
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/feyeleanor199

200. package main
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/feyeleanor200

201. http://golang.org/
go for the paranoid network programmer slideshare.net/feyeleanor201

202. twitter://#golang
go for the paranoid network programmer slideshare.net/feyeleanor202

203. twitter://@feyeleanor
go for the paranoid network programmer slideshare.net/feyeleanor