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diff --git a/doc/man/PAM.8 b/doc/man/PAM.8 new file mode 100644 index 00000000..f3da9563 --- /dev/null +++ b/doc/man/PAM.8 @@ -0,0 +1,263 @@ +.\" Title: pam +.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author] +.\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/> +.\" Date: 10/27/2010 +.\" Manual: Linux-PAM Manual +.\" Source: Linux-PAM Manual +.\" Language: English +.\" +.TH "PAM" "8" "10/27/2010" "Linux-PAM Manual" "Linux-PAM Manual" +.\" ----------------------------------------------------------------- +.\" * (re)Define some macros +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" toupper - uppercase a string (locale-aware) +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de toupper +.tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ +\\$* +.tr aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz +.. +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" SH-xref - format a cross-reference to an SH section +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de SH-xref +.ie n \{\ +.\} +.toupper \\$* +.el \{\ +\\$* +.\} +.. +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" SH - level-one heading that works better for non-TTY output +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de1 SH +.\" put an extra blank line of space above the head in non-TTY output +.if t \{\ +.sp 1 +.\} +.sp \\n[PD]u +.nr an-level 1 +.set-an-margin +.nr an-prevailing-indent \\n[IN] +.fi +.in \\n[an-margin]u +.ti 0 +.HTML-TAG ".NH \\n[an-level]" +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +\." make the size of the head bigger +.ps +3 +.ft B +.ne (2v + 1u) +.ie n \{\ +.\" if n (TTY output), use uppercase +.toupper \\$* +.\} +.el \{\ +.nr an-break-flag 0 +.\" if not n (not TTY), use normal case (not uppercase) +\\$1 +.in \\n[an-margin]u +.ti 0 +.\" if not n (not TTY), put a border/line under subheading +.sp -.6 +\l'\n(.lu' +.\} +.. +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" SS - level-two heading that works better for non-TTY output +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de1 SS +.sp \\n[PD]u +.nr an-level 1 +.set-an-margin +.nr an-prevailing-indent \\n[IN] +.fi +.in \\n[IN]u +.ti \\n[SN]u +.it 1 an-trap +.nr an-no-space-flag 1 +.nr an-break-flag 1 +.ps \\n[PS-SS]u +\." make the size of the head bigger +.ps +2 +.ft B +.ne (2v + 1u) +.if \\n[.$] \&\\$* +.. +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" BB/BE - put background/screen (filled box) around block of text +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de BB +.if t \{\ +.sp -.5 +.br +.in +2n +.ll -2n +.gcolor red +.di BX +.\} +.. +.de EB +.if t \{\ +.if "\\$2"adjust-for-leading-newline" \{\ +.sp -1 +.\} +.br +.di +.in +.ll +.gcolor +.nr BW \\n(.lu-\\n(.i +.nr BH \\n(dn+.5v +.ne \\n(BHu+.5v +.ie "\\$2"adjust-for-leading-newline" \{\ +\M[\\$1]\h'1n'\v'+.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] +.\} +.el \{\ +\M[\\$1]\h'1n'\v'-.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] +.\} +.in 0 +.sp -.5v +.nf +.BX +.in +.sp .5v +.fi +.\} +.. +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" BM/EM - put colored marker in margin next to block of text +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.de BM +.if t \{\ +.br +.ll -2n +.gcolor red +.di BX +.\} +.. +.de EM +.if t \{\ +.br +.di +.ll +.gcolor +.nr BH \\n(dn +.ne \\n(BHu +\M[\\$1]\D'P -.75n 0 0 \\n(BHu -(\\n[.i]u - \\n(INu - .75n) 0 0 -\\n(BHu'\M[] +.in 0 +.nf +.BX +.in +.fi +.\} +.. +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "Name" +PAM, pam \- Pluggable Authentication Modules for Linux +.SH "DESCRIPTION" +.PP +This manual is intended to offer a quick introduction to +\fBLinux\-PAM\fR\&. For more information the reader is directed to the +\fBLinux\-PAM system administrators\' guide\fR\&. +.PP + +\fBLinux\-PAM\fR +is a system of libraries that handle the authentication tasks of applications (services) on the system\&. The library provides a stable general interface (Application Programming Interface \- API) that privilege granting programs (such as +\fBlogin\fR(1) +and +\fBsu\fR(1)) defer to to perform standard authentication tasks\&. +.PP +The principal feature of the PAM approach is that the nature of the authentication is dynamically configurable\&. In other words, the system administrator is free to choose how individual service\-providing applications will authenticate users\&. This dynamic configuration is set by the contents of the single +\fBLinux\-PAM\fR +configuration file +\FC/etc/pam\&.conf\F[]\&. Alternatively, the configuration can be set by individual configuration files located in the +\FC/etc/pam\&.d/\F[] +directory\&. The presence of this directory will cause +\fBLinux\-PAM\fR +to +\fIignore\fR +\FC/etc/pam\&.conf\F[]\&. +.PP +From the point of view of the system administrator, for whom this manual is provided, it is not of primary importance to understand the internal behavior of the +\fBLinux\-PAM\fR +library\&. The important point to recognize is that the configuration file(s) +\fIdefine\fR +the connection between applications +(\fBservices\fR) and the pluggable authentication modules +(\fBPAM\fRs) that perform the actual authentication tasks\&. +.PP +\fBLinux\-PAM\fR +separates the tasks of +\fIauthentication\fR +into four independent management groups: +\fBaccount\fR +management; +\fBauth\fRentication management; +\fBpassword\fR +management; and +\fBsession\fR +management\&. (We highlight the abbreviations used for these groups in the configuration file\&.) +.PP +Simply put, these groups take care of different aspects of a typical user\'s request for a restricted service: +.PP +\fBaccount\fR +\- provide account verification types of service: has the user\'s password expired?; is this user permitted access to the requested service? +.PP +\fBauth\fRentication \- authenticate a user and set up user credentials\&. Typically this is via some challenge\-response request that the user must satisfy: if you are who you claim to be please enter your password\&. Not all authentications are of this type, there exist hardware based authentication schemes (such as the use of smart\-cards and biometric devices), with suitable modules, these may be substituted seamlessly for more standard approaches to authentication \- such is the flexibility of +\fBLinux\-PAM\fR\&. +.PP +\fBpassword\fR +\- this group\'s responsibility is the task of updating authentication mechanisms\&. Typically, such services are strongly coupled to those of the +\fBauth\fR +group\&. Some authentication mechanisms lend themselves well to being updated with such a function\&. Standard UN*X password\-based access is the obvious example: please enter a replacement password\&. +.PP +\fBsession\fR +\- this group of tasks cover things that should be done prior to a service being given and after it is withdrawn\&. Such tasks include the maintenance of audit trails and the mounting of the user\'s home directory\&. The +\fBsession\fR +management group is important as it provides both an opening and closing hook for modules to affect the services available to a user\&. +.SH "FILES" +.PP +\FC/etc/pam\&.conf\F[] +.RS 4 +the configuration file +.RE +.PP +\FC/etc/pam\&.d\F[] +.RS 4 +the +\fBLinux\-PAM\fR +configuration directory\&. Generally, if this directory is present, the +\FC/etc/pam\&.conf\F[] +file is ignored\&. +.RE +.SH "ERRORS" +.PP +Typically errors generated by the +\fBLinux\-PAM\fR +system of libraries, will be written to +\fBsyslog\fR(3)\&. +.SH "CONFORMING TO" +.PP +DCE\-RFC 86\&.0, October 1995\&. Contains additional features, but remains backwardly compatible with this RFC\&. +.SH "SEE ALSO" +.PP + +\fBpam\fR(3), +\fBpam_authenticate\fR(3), +\fBpam_sm_setcred\fR(3), +\fBpam_strerror\fR(3), +\fBPAM\fR(8) |