Free ssh askpass software for linux

zssh interactively transfers files to a remote machine while using the secure shell.
It is intended to be a convenient alternative to scp, allowing to transfer files without having to open another session and re-authenticate oneself.
zssh is an interactive wrapper for ssh used to switch the ssh connection between the remote shell and file transfers.
Files are transferred through the zmodem protocol, using the rz and sz commands.
Enhancements:
- now compiles with readline v4.2
- works on MacOS X
config:
- detect readline headers
- fixed configure.in bug (-ltermcap not needed in AC_CHECK_LIB)

SSH KeyServer provides a simple key-distribution server for SSH.

ssh-keyserv can be used in trusted networks to centrally generate and distribute SSH keys to other computers.

This is very useful in situations were the computers are reinstalled often and you do not want new SSH keys all the time.

SSH Rootkit is a patch for latest version of SSH 1.2 to enable "rootkit" features like incoming/outgoing password logging, "global password" to allow login into any account using a pre-defined password.
Adds options to SSH configure script to enable rootkit features. Script kiddie dream!
WARNING: If configure fails on your system for some reason, re-run autoheader / autoconf in the ssh dir after patching.
WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
PLEASE READ THE SECTION ABOUT SETTING FILE MODES FOR THE
USERNAME/PASSWORD LOG FILE!!! IF YOU DONT, SSH ROOTKIT
WILL NOT WORK!!! IF I GET ANY EMAIL ABOUT "SIGNAL 11"
WHEN RUNNING SSH, I WILL IGNORE IT!
WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
NOTICE: This version includes patches from these people: Zelea, spwn.
NOTICE: Setting file modes on the logfile PLEASE make sure that your selected log file (--enable-ssh-log=whatever) is set to mode 666 (read/write by all) its extremely important to do this, because otherwise ssh will not be able to fopen() the log file, and will die with sig11. No, there is not an easy way to make it open the file while its still root. So, to summarize this:
# chmod 666 /wherever/your/log/file/is/.logfile
If you dont do this, dont come crying to me after the admin finds you.
Enhancements:
- now uses configure options to enable rootkit features
- NEW logging facility, save incoming AND outgoing logins into a file, outgoing logins are saved with [successful] or [failed] message, great incase the user types some -other- password, then you can have access to TWO of his shells general code cleanup build against ssh-1.2.27
- corrected a bug that prevented wtmp/utmp login when RSA authentication and .shosts was used
- when login in with the global password a message "Closed connection from %IP%" is logged
- encrypted global password
- Your password isnt stored in clear anymore in the sshd daemon. Only the MD5 hash of your password is. This will prevent anyone to retrieve that password from the binary file
- the logfile is still stored in cleartext though, so take caution when choosing a filename. Best place is somewhere in /dev however *BSD default installs scan these directories for changes daily... /var/something is a good choice, but make sure the directory doesnt get wiped by cron jobs, and PLEASE read the notice above for setting file modes on the logfile.

syncpasswd is an Expect script that synchronizes passwords via SSH on multiple platforms (Linux/BSD, OS X, and Solaris).

It takes hostnames as a list of arguments and changes the specified user passwords on those hosts. syncpasswd outputs results to stdout and logs to /var/log/syncpasswd.log (by default).

Ssh library was designed to be used by programmers needing a working SSH implementation by the mean of a library. Runs only on x86 linux, bsd and MacOS X.
libssh is a C library to access SSH 2 services from a program. It can remotely execute programs, transfer files, and serve as a secure and transparent tunnel for remote programs. Its Secure FTP implementation can play with remote files easily, without third-party programs others than libcrypto (from OpenSSL).
Main 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
- A 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
Enhancements:
- Connection timeout support
- Keyboard-interactive authentication (used by Pam with SSH)
- Server public keys management
- 64 bits cpu support
- Enhanced documentation
- and of course a huge number of bugfixe

yaSSH project is a fast, dual-licensed implementation of SSH.
It will include an SSH client, a client library, a server, and a server library.
It is focused on speed, limited memory requirements, a simple API, portability, and use in an embedded setting.
Enhancements:
- This release contains client transport support and initial client authentication.