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pam_ssh ()
  • >> pam_ssh (8) ( FreeBSD man: Команды системного администрирования )

  • BSD mandoc
     

    NAME

    
    
    pam_ssh
    
     - authentication and session management with SSH private keys
    
     
    

    SYNOPSIS

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

    DESCRIPTION

    The SSH authentication service module for PAM, provides functionality for two PAM categories: authentication and session management. In terms of the module-type parameter, they are the ``auth '' and ``session '' features.  

    SSH Authentication Module

    The SSH authentication component provides a function to verify the identity of a user (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.

    The following options may be passed to the authentication module:

    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.
    try_first_pass
    This option is similar to the use_first_pass option, except that if the previously obtained password fails, the user is prompted for another password.
    nullok
    Normally, keys with no passphrase are ignored for authentication purposes. If this option is set, keys with no passphrase will be taken into consideration, allowing the user to log in with a blank password.

     

    SSH Session Management Module

    The SSH session management component provides functions to initiate (Fn pam_sm_open_session ) and terminate (Fn 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:

    want_agent
    Start an agent even if no keys were decrypted during the authentication phase.

     

    FILES

    $HOME/.ssh/identity
    SSH1 RSA key
    $HOME/.ssh/id_rsa
    SSH2 RSA key
    $HOME/.ssh/id_dsa
    SSH2 DSA key

     

    SEE ALSO

    ssh-agent1, pam.conf5, pam(8)  

    AUTHORS

    The module was originally written by An -nosplit An Andrew J. Korty Aq ajk@iu.edu . The current implementation was developed for the Fx 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. This manual page was written by An Mark R V Murray Aq markm@FreeBSD.org .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    SSH Authentication Module
    SSH Session Management Module
    FILES
    SEE ALSO
    AUTHORS


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