The ssh library was designed to be used by programmers needing a working
SSH implementation by the mean of a library. The complete control of the
client is made by the programmer. With libssh, you can remotely execute
programs, transfer files, use a secure and transparent tunnel for your
remote programs. With its Secure FTP implementation, you can play with
remote files easily, without third-party programs others than libcrypto
(from openssl). libssh features :

* Full C library functions for manipulating a client-side SSH
connection
* Lesser GPL licensing -SSH2 protocol compliant
* Fully configurable sessions
* Support for AES-128,AES-192,AES-256,blowfish, in cbc mode
* Use multiple SSH connections in a same process, at same time
* Use multiple channels in the same connection
* Thread safety when using different sessions at same time
* Basic but correct SFTP implementation (secure file transfer)
* RSA and DSS server public key supported
* Compression support (with zlib)
* Public key (RSA and DSS), password and keyboard-interactive
authentication
* Complete documentation about its API
* Runs and tested under amd64, x86, arm, sparc32, ppc under Linux,
BSD, MacosX and Solaris
* A developer listening to you
* It's free (LGPL)!