Created
October 23, 2012 13:19
-
-
Save dojiong/3938689 to your computer and use it in GitHub Desktop.
ssh sample
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"code.google.com/p/go.crypto/ssh" | |
"code.google.com/p/go.crypto/ssh/terminal" | |
"crypto" | |
"crypto/x509" | |
"crypto/rsa" | |
"encoding/pem" | |
"io" | |
"os" | |
"fmt" | |
"errors" | |
) | |
type Password struct { | |
} | |
func (pwd *Password) Password(user string) (string, error) { | |
fmt.Printf("%s's password: ", user) | |
passwd, err := terminal.ReadPassword(0) | |
if err != nil { | |
panic("read password fail: " + err.Error()) | |
} | |
return string(passwd), nil | |
} | |
type Keychain struct { | |
keys []*rsa.PrivateKey | |
} | |
func (kc *Keychain) Key(i int) (key interface{}, err error) { | |
if i < len(kc.keys) { | |
return &kc.keys[i].PublicKey, nil | |
} | |
return nil, nil | |
} | |
func (kc *Keychain) Sign(i int, rand io.Reader, data []byte) ( | |
sig []byte, err error) { | |
if i >= len(kc.keys) { | |
return nil, errors.New("no such key") | |
} | |
h := crypto.SHA1.New() | |
h.Write(data) | |
ds := h.Sum(nil) | |
return rsa.SignPKCS1v15(rand, kc.keys[i], crypto.SHA1, ds) | |
} | |
func (kc *Keychain) AddFile(path string) error { | |
key, err := readPrivateKey(path) | |
if err != nil { | |
return err | |
} | |
kc.keys = append(kc.keys, key) | |
return nil | |
} | |
func readPrivateKey(path string) (*rsa.PrivateKey, error) { | |
file, err := os.Open(path) | |
if err != nil { | |
return nil, err | |
} | |
stat, err := file.Stat() | |
if err != nil { | |
return nil, err | |
} | |
buf := make([]byte, stat.Size()) | |
_, err = file.Read(buf) | |
if err != nil { | |
return nil, err | |
} | |
block, _ := pem.Decode(buf) | |
return x509.ParsePKCS1PrivateKey(block.Bytes) | |
} | |
func getAuths() (auths []ssh.ClientAuth) { | |
kc := Keychain{} | |
if err := kc.AddFile(os.ExpandEnv("$HOME/.ssh/id_rsa")); err == nil { | |
auths = append(auths, ssh.ClientAuthKeyring(&kc)) | |
} | |
auths = append(auths, ssh.ClientAuthPassword(&Password{})) | |
return auths | |
} | |
func main() { | |
cfg := ssh.ClientConfig { | |
User: "user", | |
Auth: getAuths(), | |
} | |
conn, err := ssh.Dial("tcp", "host:22", &cfg) | |
if err != nil { | |
fmt.Printf("\n%s\n", err.Error()) | |
return | |
} | |
defer conn.Close() | |
session, err := conn.NewSession() | |
if err != nil { | |
panic("get session fail: " + err.Error()) | |
} | |
defer session.Close() | |
modes := ssh.TerminalModes{ | |
ssh.ECHO: 0, | |
} | |
if err := session.RequestPty("bash", 80, 40, modes); err != nil { | |
panic("requestpty fail: " + err.Error()) | |
} | |
stdin, err := session.StdinPipe() | |
if err != nil { | |
panic("get stdin fail: "+ err.Error()) | |
} | |
defer stdin.Close() | |
stdout, err := session.StdoutPipe() | |
if err != nil { | |
panic("get stdout fail: "+ err.Error()) | |
} | |
if err := session.Shell(); err != nil { | |
panic("shell fail: " + err.Error()) | |
} | |
go io.Copy(os.Stdout, stdout) | |
io.Copy(stdin, os.Stdin) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment