greenappers/dartssh

Dart SSH package providing first-class tunnelling primitives.

dartssh's Issues

How to upload to SFTP server with this lib?

How to upload to SFTP server with this lib?

Execute commands and download files

Hi,
This is not an issue but a feature/help request.

Your sample app (dartssh.dart) is a good example of a terminal ssh client but what I need is to connect to a server, execute commands and take actions depending on the exit codes of those commands.

I also need to download/upload files like the scp command does.

https://en.wikipedia.org/wiki/Secure_copy_protocol

I can execute commands using the sendChannelData function and receive the command output but I could not figure out how can I get the exit code of the command.

I think the scp command uses "cat " command under the hood and writes the output to the specified file name. Can this action be simulated using this library?

new version 1.0.4+4 ?

Are there any plans to release the new version on https://pub.dev/packages/dartssh
Thank you

Future/Stream based SSH

Is there any way to use this library using futures and streams? The actual SSHClient class seems to be based on callbacks. Is this possible?

Need a advice with ssh tunnelling

Hello

I would know if it possible to connect to a VPS directly with ssh tunnelling
In putty, I use the command

-L 9999:localhost:9009 root@IP_ADDRESS -pw PaSSWORD

Thx

not working on macos & web

this. package is not working on macos and web platform

expose exec command

in RFC4254 said:

This message will request that the user's default shell (typically
   defined in /etc/passwd in UNIX systems) be started at the other end.

      byte      SSH_MSG_CHANNEL_REQUEST
      uint32    recipient channel
      string    "exec"
      boolean   want reply
      string    command

expose "exec" maybe useful? can I PR this?

Verify MAC failed error cause ?

I met the error "verify MAC failed"

Could you explain me the cause please ?

This error is generated by the transport.dart

 /// Verifies the Message Authentication Code (MAC).
      sequenceNumberS2c++;
      if (encrypted && packetMacLen != 0) {
        Uint8List mac = computeMAC(
            MAC.mac(macIdS2c),
            macHashLenS,
            viewUint8List(decryptBuf, 0, packetLen - packetMacLen),
            sequenceNumberS2c - 1,
            integrityS2c,
            macPrefixS2c);
        if (!equalUint8List(
            mac,
            viewUint8List(
                readBuffer.data, packetLen - packetMacLen, packetMacLen))) {
          throw FormatException('$hostport: verify MAC failed');
        }
      }

thx

parsePem doesnt work

I have id_rsa on windows
Tryied to parse with pem.parsePem my file "id_rsa" gives error. And the same with converted id_rsa to pem format.

 client = SSHClient(
        hostport: parseUri(host),
        login: login,
        print: print,
        response: response,
        loadIdentity: () {
          if (identity == null && identityFile != null) {
            identity = pem.parsePem(io.File(identityFile).readAsStringSync());
          }
          return identity;
        },

Command i used to convert id_rsa to pem

ssh-keygen -f id_rsa.pub -m 'PEM' -e > id_rsa.pem

Error

Unhandled exception:
FormatException: type not supported: RSA PUBLIC KEY
#0      parsePem (package:dartssh/pem.dart:171:7)
#1      sshTest.<anonymous closure> (file:///D:/CODING/PROJECTS/TEST/dart-ssh/dart-ssh-test/bin/ssh.dart:56:24)
#2      SSHClient.handleMSG_SERVICE_ACCEPT (package:dartssh/client.dart:337:30)      
#3      SSHClient.handlePacket (package:dartssh/client.dart:118:9)
#4      SSHTransport.handleRead (package:dartssh/transport.dart:320:7)
#5      _RootZone.runUnaryGuarded (dart:async/zone.dart:1546:10)
#6      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)  
#7      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)        
#8      _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)
#9      _StreamController._add (dart:async/stream_controller.dart:607:7)
#10     _StreamController.add (dart:async/stream_controller.dart:554:5)
#11     _Socket._onData (dart:io-patch/socket_patch.dart:2160:41)
#12     _RootZone.runUnaryGuarded (dart:async/zone.dart:1546:10)
#13     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)  
#14     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#15     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:733:19)
#16     _StreamController._add (dart:async/stream_controller.dart:607:7)
#17     _StreamController.add (dart:async/stream_controller.dart:554:5)
#18     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:1696:33) 
#19     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1208:14) 
#20     _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
#21     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
#22     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:120:13)  
#23     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:185:5)

implement env of MSG_CHANNEL_REQUEST

Since RFC said:

6.4.  Environment Variable Passing

   Environment variables may be passed to the shell/command to be
   started later.  Uncontrolled setting of environment variables in a
   privileged process can be a security hazard.  It is recommended that
   implementations either maintain a list of allowable variable names or
   only set environment variables after the server process has dropped
   sufficient privileges.

      byte      SSH_MSG_CHANNEL_REQUEST
      uint32    recipient channel
      string    "env"
      boolean   want reply
      string    variable name
      string    variable value

Maybe helpful?
Can I PR this?

Duplicated root@xxx1234:~$ line

I know, that this is not a problem with your implementation, but how is it possible to remove those duplicated lines?

If i execute ls the command ls -a the client outputs

ls -a
.  ..  .bash_history  .bash_logout  .bashrc  .gnupg  .profile
root@xxx1234:~$
root@xxx1234:~$

so it duplicates the given input and the root@xxx1234:~$ line.

Do you know why this happens and how to fix it?

Btw, thanks for that awesome library!