On MacOS Sierra trying to connect via *Standard TCP/IP over SSH* it errors out with:

```
Authentication error, unhandled exception caught in
tunnel manager, please refer to logs for details

```

Google tells me that this error message was encountered back in 2015/2016 related to an outdated paramiko bundled with Workbench at that time. I looked at the log (`~/Library/Application Support/MySQL/Workbench/log/wb.log`) and saw a different error than the one reported in 2015/2016:

```
13:24:46 [INF][     SSH tunnel]: Opening SSH tunnel to myproxy.example.com
13:24:47 [ERR][sshtunnel.py:notify_exception_error:235]: Traceback (most recent call last):
  File "/Applications/MySQLWorkbench.app/Contents/Resources/sshtunnel.py", line 303, in _connect_ssh
    look_for_keys=has_key, allow_agent=has_key, timeout=SSH_CONNECTION_TIMEOUT)
  File "/Applications/MySQLWorkbench.app/Contents/Resources/libraries/paramiko/client.py", line 325, in connect
    t.start_client()
  File "/Applications/MySQLWorkbench.app/Contents/Resources/libraries/paramiko/transport.py", line 492, in start_client
    raise e
NotImplementedError: Use module Crypto.Signature.pkcs1_15 instead

```

Anyone run into this issue and found a work around to get it working?

Currently using:

* Workbench 6.3 (64-bit)
* MacOS Sierra 10.12.6

### Update

After trying to drop-in an updated paramiko (2.2.1) release to `Applications/MySQLWorkbench.app/Contents/Resources/Libraries/paramiko` it now provides an error saying it can't start the SSH Tunnel with the following logs:

```
13:46:07 [INF][     SSH tunnel]: Starting tunnel
13:46:07 [ERR][         python]: Error running file /Applications/MySQLWorkbench.app/Contents/Resources/sshtunnel.py
13:46:07 [WRN][               ]: Tunnel manager could not be executed

```

Trying to use latest 1.x release of paramiko (1.18.3) it provides the same Crypto.Signature.pkcs1\_15 error as above.

Key Exchanges supported on the server are:

```
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
diffie-hellman-group1-sha1
curve25519-sha256@libssh.org
gss-gex-sha1-
gss-group1-sha1-
gss-group14-sha1-

```