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120 lines
3.3 KiB
120 lines
3.3 KiB
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// Prototype, git client looks like do not recognize req.Reply.
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package ssh
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import (
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"os/exec"
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"strings"
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"github.com/Unknwon/com"
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"golang.org/x/crypto/ssh"
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"github.com/gogits/gogs/modules/log"
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)
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func handleServerConn(keyId string, chans <-chan ssh.NewChannel) {
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for newChan := range chans {
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if newChan.ChannelType() != "session" {
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newChan.Reject(ssh.UnknownChannelType, "unknown channel type")
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continue
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}
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channel, requests, err := newChan.Accept()
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if err != nil {
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log.Error(3, "Could not accept channel: %v", err)
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continue
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}
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go func(in <-chan *ssh.Request) {
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defer channel.Close()
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for req := range in {
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ok, payload := false, strings.TrimLeft(string(req.Payload), "\x00&")
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fmt.Println("Request:", req.Type, req.WantReply, payload)
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if req.WantReply {
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fmt.Println(req.Reply(true, nil))
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}
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switch req.Type {
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case "env":
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args := strings.Split(strings.Replace(payload, "\x00", "", -1), "\v")
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if len(args) != 2 {
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break
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}
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args[0] = strings.TrimLeft(args[0], "\x04")
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_, _, err := com.ExecCmdBytes("env", args[0]+"="+args[1])
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if err != nil {
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log.Error(3, "env: %v", err)
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channel.Stderr().Write([]byte(err.Error()))
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break
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}
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ok = true
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case "exec":
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os.Setenv("SSH_ORIGINAL_COMMAND", strings.TrimLeft(payload, "'("))
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log.Info("Payload: %v", strings.TrimLeft(payload, "'("))
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cmd := exec.Command("/Users/jiahuachen/Applications/Go/src/github.com/gogits/gogs/gogs", "serv", "key-"+keyId)
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cmd.Stdout = channel
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cmd.Stdin = channel
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cmd.Stderr = channel.Stderr()
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if err := cmd.Run(); err != nil {
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log.Error(3, "exec: %v", err)
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} else {
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ok = true
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}
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}
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fmt.Println("Done:", ok)
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}
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fmt.Println("Done!!!")
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}(requests)
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}
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}
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func listen(config *ssh.ServerConfig, port string) {
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listener, err := net.Listen("tcp", "0.0.0.0:"+port)
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if err != nil {
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panic(err)
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}
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for {
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// Once a ServerConfig has been configured, connections can be accepted.
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conn, err := listener.Accept()
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if err != nil {
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log.Error(3, "Fail to accept incoming connection: %v", err)
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continue
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}
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// Before use, a handshake must be performed on the incoming net.Conn.
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sConn, chans, reqs, err := ssh.NewServerConn(conn, config)
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if err != nil {
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log.Error(3, "Fail to handshake: %v", err)
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continue
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}
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// The incoming Request channel must be serviced.
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go ssh.DiscardRequests(reqs)
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go handleServerConn(sConn.Permissions.Extensions["key-id"], chans)
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}
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}
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// Listen starts a SSH server listens on given port.
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func Listen(port string) {
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config := &ssh.ServerConfig{
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PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
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// keyCache[string(ssh.MarshalAuthorizedKey(key))] = 2
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return &ssh.Permissions{Extensions: map[string]string{"key-id": "1"}}, nil
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},
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}
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privateBytes, err := ioutil.ReadFile("/Users/jiahuachen/.ssh/id_rsa")
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if err != nil {
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panic("failed to load private key")
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}
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private, err := ssh.ParsePrivateKey(privateBytes)
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if err != nil {
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panic("failed to parse private key")
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}
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config.AddHostKey(private)
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go listen(config, port)
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}
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