updated to use easyssh library
This commit is contained in:
Justin
parent
b1cb51d887
commit
b4b856a17a
10
client.go
10
client.go
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@ -4,6 +4,8 @@ import (
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"log"
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"net/rpc"
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"dev.justinjudd.org/justin/easyssh"
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"golang.org/x/crypto/ssh"
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)
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@ -12,7 +14,7 @@ type Client struct {
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*rpc.Client
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Config *ssh.ClientConfig
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ChannelName string
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sshClient *ssh.Client
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sshClient *easyssh.Client
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RPCServer *rpc.Server
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}
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@ -33,7 +35,7 @@ func NewClient() *Client {
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// Connect starts a client connection to the given SSH/RPC server.
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func (c *Client) Connect(address string) {
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sshClient, err := ssh.Dial("tcp", address, c.Config)
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sshClient, err := easyssh.Dial("tcp", address, c.Config)
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if err != nil {
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panic("Failed to dial: " + err.Error())
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}
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@ -66,7 +68,7 @@ func openRPCClientChannel(conn ssh.Conn, channelName string) (ssh.Channel, error
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}
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msg.Subsystem = RPCSubsystem
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ok, err := channel.SendRequest("subsystem", true, ssh.Marshal(&msg))
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ok, err := channel.SendRequest(easyssh.SubsystemRequest, true, ssh.Marshal(&msg))
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if err == nil && !ok {
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return nil, err
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}
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@ -107,7 +109,7 @@ func acceptRPCServerRequest(rpcServer *rpc.Server, newChannel ssh.NewChannel) {
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ok := false
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switch req.Type {
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case "subsystem":
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case easyssh.SubsystemRequest:
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ok = true
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log.Printf("subsystem '%s'", req.Payload)
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switch string(req.Payload[4:]) {
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1
doc.go
1
doc.go
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@ -1,4 +1,5 @@
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/*
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Package sshrpc provides RPC access over SSH. It uses the built-in RPC(net/rpc) library, so no RPC methods need to be rewritten.
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Can be used as a replacement transport for RPC.
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*/
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package sshrpc
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@ -0,0 +1,34 @@
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package sshrpc
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import (
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"fmt"
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"io/ioutil"
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"log"
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"golang.org/x/crypto/ssh"
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)
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type ExampleServer struct{}
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func (s *ExampleServer) Hello(name *string, out *string) error {
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*out = fmt.Sprintf("Hello %s", *name)
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return nil
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}
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func ExampleServer_StartServer() {
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s := NewServer()
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privateBytes, err := ioutil.ReadFile("id_rsa")
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if err != nil {
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log.Fatal("Failed to load private key (./id_rsa)")
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}
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private, err := ssh.ParsePrivateKey(privateBytes)
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if err != nil {
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log.Fatal("Failed to parse private key")
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}
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s.Config.AddHostKey(private)
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s.Register(new(ExampleServer))
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s.StartServer("localhost:2022")
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}
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@ -1,37 +1,6 @@
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package sshrpc
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import (
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"fmt"
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"io/ioutil"
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"log"
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"golang.org/x/crypto/ssh"
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)
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type ExampleServer struct{}
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func (s *ExampleServer) Hello(name *string, out *string) error {
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*out = fmt.Sprintf("Hello %s", *name)
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return nil
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}
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func ExampleServer_StartServer() {
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s := NewServer()
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privateBytes, err := ioutil.ReadFile("id_rsa")
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if err != nil {
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log.Fatal("Failed to load private key (./id_rsa)")
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}
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private, err := ssh.ParsePrivateKey(privateBytes)
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if err != nil {
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log.Fatal("Failed to parse private key")
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}
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s.Config.AddHostKey(private)
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s.Register(new(ExampleServer))
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s.StartServer("localhost:2022")
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}
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import "fmt"
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func ExampleClient_Connect() {
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128
server.go
128
server.go
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@ -3,9 +3,10 @@ package sshrpc
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import (
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"fmt"
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"log"
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"net"
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"net/rpc"
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"dev.justinjudd.org/justin/easyssh"
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"golang.org/x/crypto/ssh"
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)
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@ -44,97 +45,50 @@ func NewServer() *Server {
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// StartServer starts the server listening for requests
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func (s *Server) StartServer(address string) {
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// Once a ServerConfig has been configured, connections can be accepted.
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listener, err := net.Listen("tcp", address)
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if err != nil {
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log.Fatal("failed to listen on ", address)
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}
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server := easyssh.Server{Addr: address, Config: s.Config}
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handler := easyssh.NewSSHConnHandler()
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channelsMux := easyssh.NewChannelsMux()
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channelsMux.HandleChannel(s.ChannelName, s)
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handler.MultipleChannelsHandler = channelsMux
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server.Handler = handler
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server.ListenAndServe()
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// Accept all connections
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log.Print("listening on ", address)
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for {
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tcpConn, err := listener.Accept()
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if err != nil {
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log.Printf("failed to accept incoming connection (%s)", 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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sshConn, chans, reqs, err := ssh.NewServerConn(tcpConn, s.Config)
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if err != nil {
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log.Printf("failed to handshake (%s)", err)
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continue
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}
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log.Printf("new ssh connection from %s (%s)", sshConn.RemoteAddr(), sshConn.ClientVersion())
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// Print incoming out-of-band Requests
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go s.handleRequests(reqs)
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// Accept all channels
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go s.handleChannels(chans, sshConn)
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}
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}
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// handleRequests handles global out-of-band SSH Requests
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func (s *Server) handleRequests(reqs <-chan *ssh.Request) {
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for req := range reqs {
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log.Printf("recieved out-of-band request: %+v", req)
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}
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}
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func (s *Server) HandleChannel(newChannel ssh.NewChannel, channel ssh.Channel, reqs <-chan *ssh.Request, sshConn ssh.Conn) {
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go func(in <-chan *ssh.Request) {
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for req := range in {
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ok := false
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switch req.Type {
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// handleChannels handels SSH Channel requests and their local out-of-band SSH Requests
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func (s *Server) handleChannels(chans <-chan ssh.NewChannel, sshConn ssh.Conn) {
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// Service the incoming Channel channel.
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for newChannel := range chans {
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log.Printf("Received channel: %v", newChannel.ChannelType())
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// Check the type of channel
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if t := newChannel.ChannelType(); t != s.ChannelName {
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newChannel.Reject(ssh.UnknownChannelType, fmt.Sprintf("unknown channel type: %s", t))
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continue
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}
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channel, requests, err := newChannel.Accept()
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if err != nil {
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log.Printf("could not accept channel (%s)", err)
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continue
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}
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log.Printf("Accepted channel")
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// Channels can have out-of-band requests
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go func(in <-chan *ssh.Request) {
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for req := range in {
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ok := false
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switch req.Type {
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case "subsystem":
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ok = true
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log.Printf("subsystem '%s'", req.Payload[4:])
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switch string(req.Payload[4:]) {
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//RPCSubsystem Request made indicates client desires RPC Server access
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case RPCSubsystem:
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go s.ServeConn(channel)
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log.Printf("Started SSH RPC")
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// triggers reverse RPC connection as well
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clientChannel, err := openRPCClientChannel(sshConn, s.ChannelName+"-reverse")
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if err != nil {
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log.Printf("Failed to create client channel: " + err.Error())
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continue
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}
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rpcClient := rpc.NewClient(clientChannel)
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if s.CallbackFunc != nil {
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s.CallbackFunc(rpcClient, sshConn)
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}
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log.Printf("Started SSH RPC client")
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default:
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log.Printf("Unknown subsystem: %s", req.Payload)
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case easyssh.SubsystemRequest:
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ok = true
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log.Printf("subsystem '%s'", req.Payload[4:])
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switch string(req.Payload[4:]) {
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//RPCSubsystem Request made indicates client desires RPC Server access
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case RPCSubsystem:
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go s.ServeConn(channel)
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log.Printf("Started SSH RPC")
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// triggers reverse RPC connection as well
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clientChannel, err := openRPCClientChannel(sshConn, s.ChannelName+"-reverse")
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if err != nil {
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log.Printf("Failed to create client channel: " + err.Error())
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continue
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}
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rpcClient := rpc.NewClient(clientChannel)
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if s.CallbackFunc != nil {
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s.CallbackFunc(rpcClient, sshConn)
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}
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log.Printf("Started SSH RPC client")
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default:
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log.Printf("Unknown subsystem: %s", req.Payload)
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}
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}
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if !ok {
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log.Printf("declining %s request...", req.Type)
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}
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req.Reply(ok, nil)
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}
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}(requests)
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}
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if !ok {
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log.Printf("declining %s request...", req.Type)
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}
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req.Reply(ok, nil)
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}
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}(reqs)
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}
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@ -66,7 +66,7 @@ func (s *AdvancedServer) SortInts(req *AdvancedType, out *AdvancedType) error {
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func TestAdvancedServer(t *testing.T) {
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s := NewServer()
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s.Subsystem = "Advanced"
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s.ChannelName = "Advanced"
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private, err := ssh.ParsePrivateKey(testdata.ServerRSAKey)
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if err != nil {
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@ -84,7 +84,7 @@ func TestAdvancedServer(t *testing.T) {
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t.Log("preparing client")
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client := NewClient()
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client.Subsystem = "Advanced"
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client.ChannelName = "Advanced"
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client.Connect("localhost:3022")
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defer client.Close()
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var reply AdvancedType
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