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PAM_SSH(8)		  BSD System Manager's Manual		    PAM_SSH(8)

     pam_ssh --	SSH PAM	module

     [service-name] module-type	control-flag pam_ssh [options]

     The SSH authentication service module for PAM, pam_ssh provides function-
     ality for two PAM categories: authentication and session management.  In
     terms of the module-type parameter, they are the "auth" and "session"
     features.	It also	provides null functions	for the	remaining categories.

   SSH Authentication Module
     The SSH authentication component provides a function to verify the	iden-
     tity of a user (pam_sm_authenticate()), by	prompting the user for a
     passphrase	and verifying that it can decrypt the target user's SSH	key
     using that	passphrase.

     The following options may be passed to the	authentication module:

     debug	     syslog(3) debugging information at	LOG_DEBUG level.

     use_first_pass  If	the authentication module is not the first in the
		     stack, and	a previous module obtained the user's pass-
		     word, that	password is used to authenticate the user.  If
		     this fails, the authentication module returns failure
		     without prompting the user	for a password.	 This option
		     has no effect if the authentication module	is the first
		     in	the stack, or if no previous modules obtained the
		     user's password.

     try_first_pass  This option is similar to the use_first_pass option, ex-
		     cept that if the previously obtained password fails, the
		     user is prompted for another password.

   SSH Session Management Module
     The SSH session management	component provides functions to	initiate
     (pam_sm_open_session()) and terminate (pam_sm_close_session()) sessions.
     The pam_sm_open_session() function	starts an SSH agent, passing it	any
     private keys it decrypted during the authentication phase,	and sets the
     environment variables the agent specifies.	 The pam_sm_close_session()
     function kills the	previously started SSH agent by	sending	it a SIGTERM.

     The following options may be passed to the	session	management module:

     debug	     syslog(3) debugging information at	LOG_DEBUG level.

     $HOME/.ssh/identity   SSH1/OpenSSH	RSA key.
     $HOME/.ssh/id_dsa	   OpenSSH DSA key.
     $HOME/.ssh2/id_rsa_*  SSH2	RSA keys.
     $HOME/.ssh2/id_dsa_*  SSH2	DSA keys.

     ssh-agent(1), syslog(3), pam.conf(5), pam(8)

BSD			       November	26, 2001			   BSD


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