forked from eaciit/live
/
ssh.go
160 lines (139 loc) · 2.78 KB
/
ssh.go
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package live
import (
"fmt"
"golang.org/x/crypto/ssh"
"io"
"io/ioutil"
// "path"
"strings"
"sync"
)
type SSHAuthTypeEnum int
const (
SSHAuthType_Password SSHAuthTypeEnum = iota
SSHAuthType_Certificate
)
type SshParm struct {
SSHHost string
SSHUser string
SSHPassword string
SSHKeyLocation string
SSHAuthType SSHAuthTypeEnum
}
func PublicKeyFile(file string) ssh.AuthMethod {
buffer, err := ioutil.ReadFile(file)
if err != nil {
return nil
}
key, err := ssh.ParsePrivateKey(buffer)
if err != nil {
return nil
}
return ssh.PublicKeys(key)
}
func (S *SshParm) Connect() (*ssh.Client, error) {
var (
cfg *ssh.ClientConfig
)
if S.SSHAuthType == SSHAuthType_Certificate {
cfg = &ssh.ClientConfig{
User: S.SSHUser,
Auth: []ssh.AuthMethod{
PublicKeyFile(S.SSHKeyLocation),
},
}
} else {
cfg = &ssh.ClientConfig{
User: S.SSHUser,
Auth: []ssh.AuthMethod{
ssh.Password(S.SSHPassword),
},
}
}
client, e := ssh.Dial("tcp", S.SSHHost, cfg)
return client, e
}
func TermInOut(w io.Writer, r io.Reader) (chan<- string, <-chan string) {
in := make(chan string, 1)
out := make(chan string, 1)
var wg sync.WaitGroup
wg.Add(1)
go func() {
for cmd := range in {
wg.Add(1)
w.Write([]byte(cmd + "\n"))
wg.Wait()
}
}()
go func() {
var (
buf [1024 * 1024]byte
t int
)
for {
n, err := r.Read(buf[t:])
if err != nil {
close(in)
close(out)
return
}
t += n
if buf[t-2] == '$' {
out <- string(buf[:t])
t = 0
wg.Done()
}
}
}()
return in, out
}
func (S *SshParm) RunCommandSsh(cmds ...string) (string, error) {
var (
res string
err error
)
c, e := S.Connect()
if e != nil {
err = fmt.Errorf("Unable to connect: %s", e.Error())
return res, err
}
defer c.Close()
Ses, e := c.NewSession()
if e != nil {
err = fmt.Errorf("Unable to start new session: %s", e.Error())
return res, err
}
defer Ses.Close()
modes := ssh.TerminalModes{
ssh.ECHO: 0,
ssh.TTY_OP_ISPEED: 14400,
ssh.TTY_OP_OSPEED: 14400,
}
if e = Ses.RequestPty("xterm", 80, 40, modes); e != nil {
err = fmt.Errorf("Unable to start term: %s", e.Error())
return res, err
}
w, _ := Ses.StdinPipe()
r, _ := Ses.StdoutPipe()
in, out := TermInOut(w, r)
if e = Ses.Start("/bin/sh"); e != nil {
err = fmt.Errorf("Unable to start shell: %s", e.Error())
return res, err
}
cmds = append(cmds, "exit")
cmdtemp := ""
for _, cmd := range cmds {
in <- cmd
outs := strings.Split(<-out, "\n")
if len(outs) > 1 {
outtemp := strings.Trim(strings.Join(outs[:len(outs)-1], "\n"), " ")
res = res + "Output of " + cmdtemp + " : " + outtemp
}
cmdtemp = cmd
}
Ses.Wait()
/* if strings.ContainsAny(res, "Output of") {
err = fmt.Errorf("Command Fail Found")
}*/
return res, err
}