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diff --git a/Linux-PAM/doc/modules/pam_pwdb.sgml b/Linux-PAM/doc/modules/pam_pwdb.sgml deleted file mode 100644 index 7b237d2e..00000000 --- a/Linux-PAM/doc/modules/pam_pwdb.sgml +++ /dev/null @@ -1,257 +0,0 @@ -<!-- - $Id: pam_pwdb.sgml,v 1.4 2002/07/11 05:43:50 agmorgan Exp $ - - This file was written by Andrew G. Morgan <morgan@kernel.org> ---> - -<sect1>The Password-Database module - -<sect2>Synopsis - -<p> -<descrip> - -<tag><bf>Module Name:</bf></tag> -pam_pwdb - -<tag><bf>Author:</bf></tag> -Cristian Gafton <gafton@redhat.com> <newline> -and Andrew G. Morgan <morgan@kernel.org> - -<tag><bf>Maintainer:</bf></tag> -Red Hat. - -<tag><bf>Management groups provided:</bf></tag> -account; authentication; password; session - -<tag><bf>Cryptographically sensitive:</bf></tag> - -<tag><bf>Security rating:</bf></tag> - -<tag><bf>Clean code base:</bf></tag> - -<tag><bf>System dependencies:</bf></tag> -Requires properly configured <tt/libpwdb/ - -<tag><bf>Network aware:</bf></tag> - -</descrip> - -<sect2>Overview of module - -<p> -This module is a pluggable replacement for the <tt/pam_unix_../ -modules. It uses the generic interface of the <em/Password Database/ -library <tt>libpwdb</tt>. - -<sect2>Account component - -<p> -<descrip> - -<tag><bf>Recognized arguments:</bf></tag> -<tt/debug/ - -<tag><bf>Description:</bf></tag> - -The <tt/debug/ argument makes the accounting functions of this module -<tt/syslog(3)/ more information on its actions. (Remaining arguments -supported by the other functions of this module are silently ignored, -but others are logged as errors through <tt/syslog(3)/). - -Based on the following <tt/pwdb_element/s: -<tt/expire/; -<tt/last_change/; -<tt/max_change/; -<tt/defer_change/; -<tt/warn_change/, -this module performs the task of establishing the status of the user's -account and password. In the case of the latter, it may offer advice -to the user on changing their password or, through the -<tt/PAM_AUTHTOKEN_REQD/ return, delay giving service to the user until -they have established a new password. The entries listed above are -documented in the <em/Password Database Library Guide/ (see pointer -above). Should the user's record not contain one or more of these -entries, the corresponding <em/shadow/ check is not performed. - -<tag><bf>Examples/suggested usage:</bf></tag> - -In its accounting mode, this module can be inserted as follows: -<tscreen> -<verb> -# -# Ensure users account and password are still active -# -login account required pam_pwdb.so -</verb> -</tscreen> - -</descrip> - -<sect2>Authentication component - -<p> -<descrip> - -<tag><bf>Recognized arguments:</bf></tag> -<tt/debug/; -<tt/use_first_pass/; -<tt/try_first_pass/; -<tt/nullok/; -<tt/nodelay/; -<tt/likeauth/; -<tt/noreap/ - -<tag><bf>Description:</bf></tag> - -The <tt/debug/ argument makes the authentication functions of this -module <tt/syslog(3)/ more information on its actions. - -<p> -The default action of this module is to not permit the user access to -a service if their <em/official/ password is blank. The <tt/nullok/ -argument overrides this default. - -<p> -When given the argument <tt/try_first_pass/, before prompting the user -for their password, the module first tries the previous stacked -<tt/auth/-module's password in case that satisfies this module as -well. The argument <tt/use_first_pass/ forces the module to use such a -recalled password and will never prompt the user - if no password is -available or the password is not appropriate, the user will be denied -access. - -<p> -The argument, <tt>nodelay</tt>, can be used to discourage the -authentication component from requesting a delay should the -authentication as a whole fail. The default action is for the module -to request a delay-on-failure of the order of one second. - -<p> -Remaining arguments, supported by the other functions of this module, -are silently ignored. Other arguments are logged as errors through -<tt/syslog(3)/. - -<p> -A helper binary, <tt>pwdb_chkpwd</tt>, is provided to check the user's -password when it is stored in a read protected database. This binary -is very simple and will only check the password of the user invoking -it. It is called transparently on behalf of the user by the -authenticating component of this module. In this way it is possible -for applications like <em>xlock</em> to work without being -setuid-root. The module, by default, will temporarily turn off -<tt/SIGCHLD/ handling for the duration of execution of the helper -binary. This is generally the right thing to do, as many applications -are not prepared to handle this signal from a child they didn't know -was <tt/fork()/d. The <tt/noreap/ module argument can be used to -suppress this temporary shielding and may be needed for use with -certain applications. - -<p> -The <tt>likeauth</tt> argument makes the module return the same value -when called as a credential setting module and an authentication -module. This will help libpam take a sane path through the auth -component of your configuration file. - -<tag><bf>Examples/suggested usage:</bf></tag> - -The correct functionality of this module is dictated by having an -appropriate <tt>/etc/pwdb.conf</tt> file, the user -databases specified there dictate the source of the authenticated -user's record. - -</descrip> - -<sect2>Password component - -<p> -<descrip> - -<tag><bf>Recognized arguments:</bf></tag> -<tt/debug/; <tt/nullok/; <tt/not_set_pass/; <tt/use_authtok/; -<tt/try_first_pass/; <tt/use_first_pass/; <tt/md5/; <tt/bigcrypt/; -<tt/shadow/; <tt/radius/; <tt/unix/ - -<tag><bf>Description:</bf></tag> - -This part of the <tt/pam_pwdb/ module performs the task of updating -the user's password. Thanks to the flexibility of <tt/libpwdb/ this -module is able to move the user's password from one database to -another, perhaps securing the user's database entry in a dynamic -manner (<em/this is very ALPHA code at the moment!/) - this is the -purpose of the <tt/shadow/, <tt/radius/ and <tt/unix/ arguments. - -<p> -In the case of conventional unix databases (which store the password -encrypted) the <tt/md5/ argument is used to do the encryption with the -MD5 function as opposed to the <em/conventional/ <tt/crypt(3)/ call. -As an alternative to this, the <tt/bigcrypt/ argument can be used to -encrypt more than the first 8 characters of a password with DEC's -(Digital Equipment Cooperation) `C2' extension to the standard UNIX -<tt/crypt()/ algorithm. - -<p> -The <tt/nullok/ module is used to permit the changing of a password -<em/from/ an empty one. Without this argument, empty passwords are -treated as account-locking ones. - -<p> -The argument <tt/use_first_pass/ is used to lock the choice of old and -new passwords to that dictated by the previously stacked <tt/password/ -module. The <tt/try_first_pass/ argument is used to avoid the user -having to re-enter an old password when <tt/pam_pwdb/ follows a module -that possibly shared the user's old password - if this old password is -not correct the user will be prompted for the correct one. The -argument <tt/use_authtok/ is used to <em/force/ this module to set the -new password to the one provided by the previously stacked -<tt/password/ module (this is used in an example of the stacking of -the <em/Cracklib/ module documented above). - -<p> -The <tt/not_set_pass/ argument is used to inform the module that it is -not to pay attention to/make available the old or new passwords from/to -other (stacked) password modules. - -<p> -The <tt/debug/ argument makes the password functions of this module -<tt/syslog(3)/ more information on its actions. Other arguments may be -logged as erroneous to <tt/syslog(3)/. - -<tag><bf>Examples/suggested usage:</bf></tag> - -An example of the stacking of this module with respect to the -pluggable password checking module, <tt/pam_cracklib/, is given in -that modules section above. -</descrip> - -<sect2>Session component - -<p> -<descrip> - -<tag><bf>Recognized arguments:</bf></tag> - -<tag><bf>Description:</bf></tag> - -No arguments are recognized by this module component. Its action is -simply to log the username and the service-type to -<tt/syslog(3)/. Messages are logged at the beginning and end of the -user's session. - -<tag><bf>Examples/suggested usage:</bf></tag> - -The use of the session modules is straightforward: -<tscreen> -<verb> -# -# pwdb - unix like session opening and closing -# -login session required pam_pwdb.so -</verb> -</tscreen> - -</descrip> - -<!-- -End of sgml insert for this module. ---> |