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main.go
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main.go
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package main
import (
"bufio"
"io"
"log"
"net"
"strings"
"golang.org/x/crypto/ssh"
)
type SSHConn struct {
*ssh.Client
password string
}
func Connect(addr, user, password string) (*SSHConn, error) {
sshConfig := &ssh.ClientConfig{
User: user,
Auth: []ssh.AuthMethod{
ssh.Password(password),
},
HostKeyCallback: ssh.HostKeyCallback(func(hostname string, remote net.Addr, key ssh.PublicKey) error { return nil }),
}
conn, err := ssh.Dial("tcp", addr, sshConfig)
if err != nil {
return nil, err
}
return &SSHConn{conn, password}, nil
}
func (conn *SSHConn) Exec(cmds ...string) ([]byte, error) {
session, err := conn.NewSession()
if err != nil {
log.Fatal(err)
}
defer session.Close()
modes := ssh.TerminalModes{
ssh.ECHO: 0,
ssh.TTY_OP_ISPEED: 14400,
ssh.TTY_OP_OSPEED: 14400,
}
err = session.RequestPty("xterm", 80, 40, modes)
if err != nil {
return []byte{}, err
}
in, err := session.StdinPipe()
if err != nil {
log.Fatal(err)
}
out, err := session.StdoutPipe()
if err != nil {
log.Fatal(err)
}
var output []byte
go func(in io.WriteCloser, out io.Reader, output *[]byte) {
var (
line string
r = bufio.NewReader(out)
)
for {
b, err := r.ReadByte()
if err != nil {
break
}
*output = append(*output, b)
if b == byte('\n') {
line = ""
continue
}
line += string(b)
if strings.HasPrefix(line, "[sudo] password for ") && strings.HasSuffix(line, ": ") {
_, err = in.Write([]byte(conn.password + "\n"))
if err != nil {
break
}
}
}
}(in, out, &output)
cmd := strings.Join(cmds, "; ")
_, err = session.Output(cmd)
if err != nil {
return []byte{}, err
}
return output, nil
}