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Copyright (c) 2001 Networks Associates Technologies, Inc.
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This software was developed for the FreeBSD Project by ThinkSec AS and
NAI Labs, the Security Research Division of Network Associates, Inc.
under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
DARPA CHATS research program.
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$FreeBSD: head/lib/libpam/modules/pam_ssh/pam_ssh.8 86933 2001-11-27 00:57:50Z des $
.Dd November 26, 2001 .Dt PAM_SSH 8 .Os .Sh NAME .Nm pam_ssh .Nd SSH PAM module .Sh SYNOPSIS .Op Ar service-name .Ar module-type .Ar control-flag
a pam_ssh .Op Ar options .Sh DESCRIPTION The SSH authentication service module for PAM, .Nm provides functionality for two PAM categories: authentication and session management. In terms of the .Ar module-type parameter, they are the .Dq Li auth and .Dq Li session features. It also provides null functions for the remaining categories. .Ss SSH Authentication Module The SSH authentication component provides a function to verify the identity of a user
q Fn 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.
p The following options may be passed to the authentication module: l -tag -width ".Cm use_first_pass" t Cm debug .Xr syslog 3 debugging information at .Dv LOG_DEBUG level. t Cm use_first_pass If the authentication module is not the first in the stack, and a previous module obtained the user's password, 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. t Cm try_first_pass This option is similar to the .Cm use_first_pass option, except that if the previously obtained password fails, the user is prompted for another password. .El .Ss SSH Session Management Module The x session management component provides functions to initiate
q Fn pam_sm_open_session and terminate
q Fn pam_sm_close_session sessions. The .Fn 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 .Fn pam_sm_close_session function kills the previously started SSH agent by sending it a .Dv SIGTERM .
p The following options may be passed to the session management module: l -tag -width ".Cm use_first_pass" t Cm debug .Xr syslog 3 debugging information at .Dv LOG_DEBUG level. .El .Sh FILES l -tag -width ".Pa $HOME/.ssh2/id_dsa_*" -compact t Pa $HOME/.ssh/identity SSH1/OpenSSH RSA key. t Pa $HOME/.ssh/id_dsa OpenSSH DSA key. t Pa $HOME/.ssh2/id_rsa_* SSH2 RSA keys. t Pa $HOME/.ssh2/id_dsa_* SSH2 DSA keys. .El .Sh SEE ALSO .Xr pam 8 , .Xr pam.conf 5 , .Xr ssh-agent 1 , .Xr syslog 3