Using TCP sockets to connect via SSH within a C++ application

nano2 · #1 19-Sep-2008, 03:28

Hi ,

I have the following scenario where by I can connect using telnet
telnet localhost portnumber

However I want to now have the capability to connect via SSH

ssh localhost -p port number

My application is using the TCP socket connection and works fine for the telnet.

I can ssh sucessfully into the localhost w/o supplying a password and this is my o/p.

Do I need to put something in my code so that it can do the same ..

Please advise .
Thanks

Code:

output from ssh <hostname> -v

Sun_SSH_1.1, SSH protocols 1.5/2.0, OpenSSL 0x0090704f
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Rhosts Authentication disabled, originating port will not be trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to billc [10.0.3.1] port 22.
debug1: Connection established.
debug1: identity file /home/t/.ssh/identity type -1
debug1: identity file /home/t/.ssh/id_rsa type 1
debug1: identity file /home/t/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version Sun_SSH_1.1
debug1: no match: Sun_SSH_1.1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-Sun_SSH_1.1
debug1: Failed to acquire GSS-API credentials for any mechanisms (No credentials were supplied, or the credentials were unavailable or inaccessible
Unknown code 0
)
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: Peer sent proposed langtags, ctos: fr,fr-BE,fr-FR,en-GB,en-IE,nl,nl-BE,nl-NL,i-default
debug1: Peer sent proposed langtags, stoc: fr,fr-BE,fr-FR,en-GB,en-IE,nl,nl-BE,nl-NL,i-default
debug1: We proposed langtags, ctos: i-default
debug1: We proposed langtags, stoc: i-default
debug1: Negotiated lang: i-default
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: Remote: Negotiated main locale: C
debug1: Remote: Negotiated messages locale: C
debug1: dh_gen_key: priv key bits set: 128/256
debug1: bits set: 1592/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'billc' is known and matches the RSA host key.
debug1: Found key in /home/t/.ssh/known_hosts:2
debug1: bits set: 1566/3191
debug1: ssh_rsa_verify: signature correct
debug1: newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: done: ssh_kex2.
debug1: send SSH2_MSG_SERVICE_REQUEST
debug1: got SSH2_MSG_SERVICE_ACCEPT
debug1: Authentications that can continue: gssapi-keyex,gssapi-with-mic,publickey,password,keyboard-interactive
debug1: Next authentication method: gssapi-keyex
debug1: Next authentication method: gssapi-with-mic
debug1: Failed to acquire GSS-API credentials for any mechanisms (No credentials were supplied, or the credentials were unavailable or inaccessible
Unknown code 0
)
debug1: Next authentication method: publickey
debug1: Trying private key: /home/t/.ssh/identity
debug1: Trying public key: /home/t/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 149 lastkey 6dd88 hint 1
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey)
debug1: channel 0: new [client-session]

nano2 · #2 19-Sep-2008, 05:18

Something else I forgot to add

when I
telnet hostname portnumber
Trying...
Connected to hostname.x.lan.
Escape character is '^]'.
prompt>

with the ssh

Code:

ssh hostname -p 39505 -v
OpenSSH_3.8, OpenSSL 0.9.7d 17 Mar 2004
HP-UX_Secure_Shell-A.03.81.003, HP_UX Secure Shell version
debug1: Reading configuration data /opt/ssh/etc/ssh_config
debug1: Connecting to billc [10.0.3.1] port 39505.
debug1: Connection established.
debug1: identity file /home/t/.ssh/id_rsa type 1
debug1: identity file /home/t/.ssh/id_dsa type 2

It appears the ssh session thats established isn't sending or receiving requests as it hangs not responding .

Whereas I would expect the same behaviour from the telnet session returning back to prompt> as requested in the code .

Any ideas why I'm not getting this with ssh?

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Using TCP sockets to connect via SSH within a C++ application

Re: Using TCP sockets to connect via ssh within a c++ application