diff options
Diffstat (limited to 'modules/pam_succeed_if')
| -rw-r--r-- | modules/pam_succeed_if/Makefile.am | 31 | ||||
| -rw-r--r-- | modules/pam_succeed_if/Makefile.in | 667 | ||||
| -rw-r--r-- | modules/pam_succeed_if/README | 124 | ||||
| -rw-r--r-- | modules/pam_succeed_if/README.xml | 41 | ||||
| -rw-r--r-- | modules/pam_succeed_if/pam_succeed_if.8 | 191 | ||||
| -rw-r--r-- | modules/pam_succeed_if/pam_succeed_if.8.xml | 297 | ||||
| -rw-r--r-- | modules/pam_succeed_if/pam_succeed_if.c | 552 | ||||
| -rwxr-xr-x | modules/pam_succeed_if/tst-pam_succeed_if | 2 |
8 files changed, 1905 insertions, 0 deletions
diff --git a/modules/pam_succeed_if/Makefile.am b/modules/pam_succeed_if/Makefile.am new file mode 100644 index 00000000..0394f42d --- /dev/null +++ b/modules/pam_succeed_if/Makefile.am @@ -0,0 +1,31 @@ +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de> +# + +CLEANFILES = *~ + +EXTRA_DIST = README ${MANS} ${XMLS} tst-pam_succeed_if + +TESTS = tst-pam_succeed_if + +man_MANS = pam_succeed_if.8 + +XMLS = README.xml pam_succeed_if.8.xml + +securelibdir = $(SECUREDIR) +secureconfdir = $(SCONFIGDIR) + +AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include +AM_LDFLAGS = -no-undefined -avoid-version -module +if HAVE_VERSIONING + AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map +endif + +securelib_LTLIBRARIES = pam_succeed_if.la +pam_succeed_if_la_LIBADD = -L$(top_builddir)/libpam -lpam + +if ENABLE_REGENERATE_MAN +noinst_DATA = README +README: pam_succeed_if.8.xml +-include $(top_srcdir)/Make.xml.rules +endif diff --git a/modules/pam_succeed_if/Makefile.in b/modules/pam_succeed_if/Makefile.in new file mode 100644 index 00000000..d155d22f --- /dev/null +++ b/modules/pam_succeed_if/Makefile.in @@ -0,0 +1,667 @@ +# Makefile.in generated by automake 1.10.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de> +# + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = 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install-info \ + install-info-am install-man install-man8 install-pdf \ + install-pdf-am install-ps install-ps-am \ + install-securelibLTLIBRARIES install-strip installcheck \ + installcheck-am installdirs maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags uninstall uninstall-am uninstall-man uninstall-man8 \ + uninstall-securelibLTLIBRARIES + +@ENABLE_REGENERATE_MAN_TRUE@README: pam_succeed_if.8.xml +@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/modules/pam_succeed_if/README b/modules/pam_succeed_if/README new file mode 100644 index 00000000..6e4907c6 --- /dev/null +++ b/modules/pam_succeed_if/README @@ -0,0 +1,124 @@ +pam_succeed_if — test account characteristics + +━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ + +DESCRIPTION + +pam_succeed_if.so is designed to succeed or fail authentication based on +characteristics of the account belonging to the user being authenticated. One +use is to select whether to load other modules based on this test. + +The module should be given one or more conditions as module arguments, and +authentication will succeed only if all of the conditions are met. + +OPTIONS + +The following flags are supported: + +debug + + Turns on debugging messages sent to syslog. + +use_uid + + Evaluate conditions using the account of the user whose UID the application + is running under instead of the user being authenticated. + +quiet + + Don't log failure or success to the system log. + +quiet_fail + + Don't log failure to the system log. + +quiet_success + + Don't log success to the system log. + +Conditions are three words: a field, a test, and a value to test for. + +Available fields are user, uid, gid, shell, home and service: + +field < number + + Field has a value numerically less than number. + +field <= number + + Field has a value numerically less than or equal to number. + +field eq number + + Field has a value numerically equal to number. + +field >= number + + Field has a value numerically greater than or equal to number. + +field > number + + Field has a value numerically greater than number. + +field ne number + + Field has a value numerically different from number. + +field = string + + Field exactly matches the given string. + +field != string + + Field does not match the given string. + +field =~ glob + + Field matches the given glob. + +field !~ glob + + Field does not match the given glob. + +field in item:item:... + + Field is contained in the list of items separated by colons. + +field notin item:item:... + + Field is not contained in the list of items separated by colons. + +user ingroup group + + User is in given group. + +user notingroup group + + User is not in given group. + +user innetgr netgroup + + (user,host) is in given netgroup. + +user notinnetgr group + + (user,host) is not in given netgroup. + +EXAMPLES + +To emulate the behaviour of pam_wheel, except there is no fallback to group 0: + +auth required pam_succeed_if.so quiet user ingroup wheel + + +Given that the type matches, only loads the othermodule rule if the UID is over +500. Adjust the number after default to skip several rules. + +type [default=1 success=ignore] pam_succeed_if.so quiet uid > 500 +type required othermodule.so arguments... + + +AUTHOR + +Nalin Dahyabhai <nalin@redhat.com> + diff --git a/modules/pam_succeed_if/README.xml b/modules/pam_succeed_if/README.xml new file mode 100644 index 00000000..c52f00a0 --- /dev/null +++ b/modules/pam_succeed_if/README.xml @@ -0,0 +1,41 @@ +<?xml version="1.0" encoding='UTF-8'?> +<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" +"http://www.docbook.org/xml/4.3/docbookx.dtd" +[ +<!-- +<!ENTITY pamaccess SYSTEM "pam_succeed_if.8.xml"> +--> +]> + +<article> + + <articleinfo> + + <title> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_succeed_if.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_succeed_if-name"]/*)'/> + </title> + + </articleinfo> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_succeed_if.8.xml" xpointer='xpointer(//refsect1[@id = "pam_succeed_if-description"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_succeed_if.8.xml" xpointer='xpointer(//refsect1[@id = "pam_succeed_if-options"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_succeed_if.8.xml" xpointer='xpointer(//refsect1[@id = "pam_succeed_if-examples"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_succeed_if.8.xml" xpointer='xpointer(//refsect1[@id = "pam_succeed_if-author"]/*)'/> + </section> + +</article> diff --git a/modules/pam_succeed_if/pam_succeed_if.8 b/modules/pam_succeed_if/pam_succeed_if.8 new file mode 100644 index 00000000..65c710e8 --- /dev/null +++ b/modules/pam_succeed_if/pam_succeed_if.8 @@ -0,0 +1,191 @@ +.\" Title: pam_succeed_if +.\" Author: +.\" Generator: DocBook XSL Stylesheets v1.73.1 <http://docbook.sf.net/> +.\" Date: 04/16/2008 +.\" Manual: Linux-PAM +.\" Source: Linux-PAM +.\" +.TH "PAM_SUCCEED_IF" "8" "04/16/2008" "Linux-PAM" "Linux\-PAM" +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.SH "NAME" +pam_succeed_if - test account characteristics +.SH "SYNOPSIS" +.HP 18 +\fBpam_succeed_if\.so\fR [\fIflag\fR...] [\fIcondition\fR...] +.SH "DESCRIPTION" +.PP +pam_succeed_if\.so is designed to succeed or fail authentication based on characteristics of the account belonging to the user being authenticated\. One use is to select whether to load other modules based on this test\. +.PP +The module should be given one or more conditions as module arguments, and authentication will succeed only if all of the conditions are met\. +.SH "OPTIONS" +.PP +The following +\fIflag\fRs are supported: +.PP +\fBdebug\fR +.RS 4 +Turns on debugging messages sent to syslog\. +.RE +.PP +\fBuse_uid\fR +.RS 4 +Evaluate conditions using the account of the user whose UID the application is running under instead of the user being authenticated\. +.RE +.PP +\fBquiet\fR +.RS 4 +Don\'t log failure or success to the system log\. +.RE +.PP +\fBquiet_fail\fR +.RS 4 +Don\'t log failure to the system log\. +.RE +.PP +\fBquiet_success\fR +.RS 4 +Don\'t log success to the system log\. +.RE +.PP + +\fICondition\fRs are three words: a field, a test, and a value to test for\. +.PP +Available fields are +\fIuser\fR, +\fIuid\fR, +\fIgid\fR, +\fIshell\fR, +\fIhome\fR +and +\fIservice\fR: +.PP +\fBfield < number\fR +.RS 4 +Field has a value numerically less than number\. +.RE +.PP +\fBfield <= number\fR +.RS 4 +Field has a value numerically less than or equal to number\. +.RE +.PP +\fBfield eq number\fR +.RS 4 +Field has a value numerically equal to number\. +.RE +.PP +\fBfield >= number\fR +.RS 4 +Field has a value numerically greater than or equal to number\. +.RE +.PP +\fBfield > number\fR +.RS 4 +Field has a value numerically greater than number\. +.RE +.PP +\fBfield ne number\fR +.RS 4 +Field has a value numerically different from number\. +.RE +.PP +\fBfield = string\fR +.RS 4 +Field exactly matches the given string\. +.RE +.PP +\fBfield != string\fR +.RS 4 +Field does not match the given string\. +.RE +.PP +\fBfield =~ glob\fR +.RS 4 +Field matches the given glob\. +.RE +.PP +\fBfield !~ glob\fR +.RS 4 +Field does not match the given glob\. +.RE +.PP +\fBfield in item:item:\.\.\.\fR +.RS 4 +Field is contained in the list of items separated by colons\. +.RE +.PP +\fBfield notin item:item:\.\.\.\fR +.RS 4 +Field is not contained in the list of items separated by colons\. +.RE +.PP +\fBuser ingroup group\fR +.RS 4 +User is in given group\. +.RE +.PP +\fBuser notingroup group\fR +.RS 4 +User is not in given group\. +.RE +.PP +\fBuser innetgr netgroup\fR +.RS 4 +(user,host) is in given netgroup\. +.RE +.PP +\fBuser notinnetgr group\fR +.RS 4 +(user,host) is not in given netgroup\. +.RE +.SH "MODULE SERVICES PROVIDED" +.PP +All services are supported\. +.SH "RETURN VALUES" +.PP +PAM_SUCCESS +.RS 4 +The condition was true\. +.RE +.PP +PAM_AUTH_ERR +.RS 4 +The condition was false\. +.RE +.PP +PAM_SERVICE_ERR +.RS 4 +A service error occured or the arguments can\'t be parsed as numbers\. +.RE +.SH "EXAMPLES" +.PP +To emulate the behaviour of +\fIpam_wheel\fR, except there is no fallback to group 0: +.sp +.RS 4 +.nf +auth required pam_succeed_if\.so quiet user ingroup wheel + +.fi +.RE +.PP +Given that the type matches, only loads the othermodule rule if the UID is over 500\. Adjust the number after default to skip several rules\. +.sp +.RS 4 +.nf +type [default=1 success=ignore] pam_succeed_if\.so quiet uid > 500 +type required othermodule\.so arguments\.\.\. + +.fi +.RE +.SH "SEE ALSO" +.PP + +\fBglob\fR(7), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +Nalin Dahyabhai <nalin@redhat\.com> diff --git a/modules/pam_succeed_if/pam_succeed_if.8.xml b/modules/pam_succeed_if/pam_succeed_if.8.xml new file mode 100644 index 00000000..d064e03b --- /dev/null +++ b/modules/pam_succeed_if/pam_succeed_if.8.xml @@ -0,0 +1,297 @@ +<?xml version="1.0" encoding='UTF-8'?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" + "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"> + + +<refentry id='pam_succeed_if'> +<!-- Copyright 2003, 2004 Red Hat, Inc. --> +<!-- Written by Nalin Dahyabhai <nalin@redhat.com> --> + + <refmeta> + <refentrytitle>pam_succeed_if</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class='sectdesc'>Linux-PAM</refmiscinfo> + </refmeta> + + <refnamediv id='pam_succeed_if-name'> + <refname>pam_succeed_if</refname> + <refpurpose>test account characteristics</refpurpose> + </refnamediv> + + + <refsynopsisdiv> + <cmdsynopsis id='pam_succeed_if-cmdsynopsis'> + <command>pam_succeed_if.so</command> + <arg choice='opt' rep='repeat'><replaceable>flag</replaceable></arg> + <arg choice='opt' rep='repeat'><replaceable>condition</replaceable></arg> + </cmdsynopsis> + </refsynopsisdiv> + + + <refsect1 id='pam_succeed_if-description'> + <title>DESCRIPTION</title> + <para> + pam_succeed_if.so is designed to succeed or fail authentication + based on characteristics of the account belonging to the user being + authenticated. One use is to select whether to load other modules based + on this test. + </para> + + <para> + The module should be given one or more conditions as module arguments, + and authentication will succeed only if all of the conditions are met. + </para> + </refsect1> + + <refsect1 id="pam_succeed_if-options"> + <title>OPTIONS</title> + <para> + The following <emphasis>flag</emphasis>s are supported: + </para> + + <variablelist> + <varlistentry> + <term><option>debug</option></term> + <listitem> + <para>Turns on debugging messages sent to syslog.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>use_uid</option></term> + <listitem> + <para> + Evaluate conditions using the account of the user whose UID + the application is running under instead of the user being + authenticated. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>quiet</option></term> + <listitem> + <para>Don't log failure or success to the system log.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>quiet_fail</option></term> + <listitem> + <para> + Don't log failure to the system log. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>quiet_success</option></term> + <listitem> + <para> + Don't log success to the system log. + </para> + </listitem> + </varlistentry> + </variablelist> + + <para> + <emphasis>Condition</emphasis>s are three words: a field, a test, + and a value to test for. + </para> + <para> + Available fields are <emphasis>user</emphasis>, + <emphasis>uid</emphasis>, <emphasis>gid</emphasis>, + <emphasis>shell</emphasis>, <emphasis>home</emphasis> + and <emphasis>service</emphasis>: + </para> + + <variablelist> + <varlistentry> + <term><option>field < number</option></term> + <listitem> + <para>Field has a value numerically less than number.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field <= number</option></term> + <listitem> + <para> + Field has a value numerically less than or equal to number. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field eq number</option></term> + <listitem> + <para> + Field has a value numerically equal to number. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field >= number</option></term> + <listitem> + <para> + Field has a value numerically greater than or equal to number. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field > number</option></term> + <listitem> + <para> + Field has a value numerically greater than number. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field ne number</option></term> + <listitem> + <para> + Field has a value numerically different from number. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field = string</option></term> + <listitem> + <para> + Field exactly matches the given string. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field != string</option></term> + <listitem> + <para> + Field does not match the given string. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field =~ glob</option></term> + <listitem> + <para>Field matches the given glob.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field !~ glob</option></term> + <listitem> + <para>Field does not match the given glob.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field in item:item:...</option></term> + <listitem> + <para>Field is contained in the list of items separated by colons.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>field notin item:item:...</option></term> + <listitem> + <para>Field is not contained in the list of items separated by colons.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>user ingroup group</option></term> + <listitem> + <para>User is in given group.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>user notingroup group</option></term> + <listitem> + <para>User is not in given group.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>user innetgr netgroup</option></term> + <listitem> + <para>(user,host) is in given netgroup.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>user notinnetgr group</option></term> + <listitem> + <para>(user,host) is not in given netgroup.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id="pam_succeed_if-services"> + <title>MODULE SERVICES PROVIDED</title> + <para> + All services are supported. + </para> + </refsect1> + + <refsect1 id='pam_succeed_if-return_values'> + <title>RETURN VALUES</title> + <variablelist> + + <varlistentry> + <term>PAM_SUCCESS</term> + <listitem> + <para> + The condition was true. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>PAM_AUTH_ERR</term> + <listitem> + <para> + The condition was false. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>PAM_SERVICE_ERR</term> + <listitem> + <para> + A service error occured or the arguments can't be + parsed as numbers. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + + <refsect1 id='pam_succeed_if-examples'> + <title>EXAMPLES</title> + <para> + To emulate the behaviour of <emphasis>pam_wheel</emphasis>, except + there is no fallback to group 0: + </para> + <programlisting> +auth required pam_succeed_if.so quiet user ingroup wheel + </programlisting> + + <para> + Given that the type matches, only loads the othermodule rule if + the UID is over 500. Adjust the number after default to skip + several rules. + </para> + <programlisting> +type [default=1 success=ignore] pam_succeed_if.so quiet uid > 500 +type required othermodule.so arguments... + </programlisting> + </refsect1> + + <refsect1 id='pam_succeed_if-see_also'> + <title>SEE ALSO</title> + <para> + <citerefentry> + <refentrytitle>glob</refentrytitle><manvolnum>7</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum> + </citerefentry> + </para> + </refsect1> + + <refsect1 id='pam_succeed_if-author'> + <title>AUTHOR</title> + <para>Nalin Dahyabhai <nalin@redhat.com></para> + </refsect1> +</refentry> diff --git a/modules/pam_succeed_if/pam_succeed_if.c b/modules/pam_succeed_if/pam_succeed_if.c new file mode 100644 index 00000000..06cb5d6a --- /dev/null +++ b/modules/pam_succeed_if/pam_succeed_if.c @@ -0,0 +1,552 @@ +/****************************************************************************** + * A simple user-attribute based module for PAM. + * + * Copyright (c) 2003 Red Hat, Inc. + * Written by Nalin Dahyabhai <nalin@redhat.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * ALTERNATIVELY, this product may be distributed under the terms of + * the GNU Public License, in which case the provisions of the GPL are + * required INSTEAD OF the above restrictions. (This clause is + * necessary due to a potential bad interaction between the GPL and + * the restrictions contained in a BSD-style copyright.) + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "config.h" + +#include <sys/types.h> +#include <errno.h> +#include <fcntl.h> +#include <fnmatch.h> +#include <limits.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> +#include <pwd.h> +#include <grp.h> +#include <netdb.h> + +#define PAM_SM_AUTH +#define PAM_SM_ACCOUNT +#define PAM_SM_SESSION +#define PAM_SM_PASSWORD + +#include <security/pam_modules.h> +#include <security/pam_modutil.h> +#include <security/pam_ext.h> + +/* Basically, run cmp(atol(left), atol(right)), returning PAM_SUCCESS if + * the function returns non-zero, PAM_AUTH_ERR if it returns zero, and + * PAM_SERVICE_ERR if the arguments can't be parsed as numbers. */ +static int +evaluate_num(const pam_handle_t *pamh, const char *left, + const char *right, int (*cmp)(int, int)) +{ + long l, r; + char *p; + int ret = PAM_SUCCESS; + + errno = 0; + l = strtol(left, &p, 0); + if ((p == NULL) || (*p != '\0') || errno) { + pam_syslog(pamh, LOG_INFO, "\"%s\" is not a number", left); + ret = PAM_SERVICE_ERR; + } + + r = strtol(right, &p, 0); + if ((p == NULL) || (*p != '\0') || errno) { + pam_syslog(pamh, LOG_INFO, "\"%s\" is not a number", right); + ret = PAM_SERVICE_ERR; + } + + if (ret != PAM_SUCCESS) { + return ret; + } + + return cmp(l, r) ? PAM_SUCCESS : PAM_AUTH_ERR; +} + +/* Simple numeric comparison callbacks. */ +static int +eq(int i, int j) +{ + return i == j; +} +static int +ne(int i, int j) +{ + return i != j; +} +static int +lt(int i, int j) +{ + return i < j; +} +static int +le(int i, int j) +{ + return lt(i, j) || eq(i, j); +} +static int +gt(int i, int j) +{ + return i > j; +} +static int +ge(int i, int j) +{ + return gt(i, j) || eq(i, j); +} + +/* Test for numeric equality. */ +static int +evaluate_eqn(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, eq); +} +/* Test for string equality. */ +static int +evaluate_eqs(const char *left, const char *right) +{ + return (strcmp(left, right) == 0) ? PAM_SUCCESS : PAM_AUTH_ERR; +} +/* Test for numeric inequality. */ +static int +evaluate_nen(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, ne); +} +/* Test for string inequality. */ +static int +evaluate_nes(const char *left, const char *right) +{ + return (strcmp(left, right) != 0) ? PAM_SUCCESS : PAM_AUTH_ERR; +} +/* Test for numeric less-than-ness(?) */ +static int +evaluate_lt(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, lt); +} +/* Test for numeric less-than-or-equal-ness(?) */ +static int +evaluate_le(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, le); +} +/* Test for numeric greater-than-ness(?) */ +static int +evaluate_gt(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, gt); +} +/* Test for numeric greater-than-or-equal-ness(?) */ +static int +evaluate_ge(const pam_handle_t *pamh, const char *left, const char *right) +{ + return evaluate_num(pamh, left, right, ge); +} +/* Check for file glob match. */ +static int +evaluate_glob(const char *left, const char *right) +{ + return (fnmatch(right, left, 0) == 0) ? PAM_SUCCESS : PAM_AUTH_ERR; +} +/* Check for file glob mismatch. */ +static int +evaluate_noglob(const char *left, const char *right) +{ + return (fnmatch(right, left, 0) != 0) ? PAM_SUCCESS : PAM_AUTH_ERR; +} +/* Check for list match. */ +static int +evaluate_inlist(const char *left, const char *right) +{ + char *p; + /* Don't care about left containing ':'. */ + while ((p=strstr(right, left)) != NULL) { + if (p == right || *(p-1) == ':') { /* ':' is a list separator */ + p += strlen(left); + if (*p == '\0' || *p == ':') { + return PAM_SUCCESS; + } + } + right = strchr(p, ':'); + if (right == NULL) + break; + else + ++right; + } + return PAM_AUTH_ERR; +} +/* Check for list mismatch. */ +static int +evaluate_notinlist(const char *left, const char *right) +{ + return evaluate_inlist(left, right) != PAM_SUCCESS ? PAM_SUCCESS : PAM_AUTH_ERR; +} +/* Return PAM_SUCCESS if the user is in the group. */ +static int +evaluate_ingroup(pam_handle_t *pamh, const char *user, const char *group) +{ + if (pam_modutil_user_in_group_nam_nam(pamh, user, group) == 1) + return PAM_SUCCESS; + return PAM_AUTH_ERR; +} +/* Return PAM_SUCCESS if the user is NOT in the group. */ +static int +evaluate_notingroup(pam_handle_t *pamh, const char *user, const char *group) +{ + if (pam_modutil_user_in_group_nam_nam(pamh, user, group) == 0) + return PAM_SUCCESS; + return PAM_AUTH_ERR; +} +/* Return PAM_SUCCESS if the (host,user) is in the netgroup. */ +static int +evaluate_innetgr(const char *host, const char *user, const char *group) +{ + if (innetgr(group, host, user, NULL) == 1) + return PAM_SUCCESS; + return PAM_AUTH_ERR; +} +/* Return PAM_SUCCESS if the (host,user) is NOT in the netgroup. */ +static int +evaluate_notinnetgr(const char *host, const char *user, const char *group) +{ + if (innetgr(group, host, user, NULL) == 0) + return PAM_SUCCESS; + return PAM_AUTH_ERR; +} + +/* Match a triple. */ +static int +evaluate(pam_handle_t *pamh, int debug, + const char *left, const char *qual, const char *right, + struct passwd *pwd) +{ + char buf[LINE_MAX] = ""; + const char *attribute = left; + /* Figure out what we're evaluating here, and convert it to a string.*/ + if ((strcasecmp(left, "login") == 0) || + (strcasecmp(left, "name") == 0) || + (strcasecmp(left, "user") == 0)) { + snprintf(buf, sizeof(buf), "%s", pwd->pw_name); + left = buf; + } + if (strcasecmp(left, "uid") == 0) { + snprintf(buf, sizeof(buf), "%lu", (unsigned long) pwd->pw_uid); + left = buf; + } + if (strcasecmp(left, "gid") == 0) { + snprintf(buf, sizeof(buf), "%lu", (unsigned long) pwd->pw_gid); + left = buf; + } + if (strcasecmp(left, "shell") == 0) { + snprintf(buf, sizeof(buf), "%s", pwd->pw_shell); + left = buf; + } + if ((strcasecmp(left, "home") == 0) || + (strcasecmp(left, "dir") == 0) || + (strcasecmp(left, "homedir") == 0)) { + snprintf(buf, sizeof(buf), "%s", pwd->pw_dir); + left = buf; + } + if (strcasecmp(left, "service") == 0) { + const void *svc; + if (pam_get_item(pamh, PAM_SERVICE, &svc) != PAM_SUCCESS) + svc = ""; + snprintf(buf, sizeof(buf), "%s", (const char *)svc); + left = buf; + } + /* If we have no idea what's going on, return an error. */ + if (left != buf) { + pam_syslog(pamh, LOG_CRIT, "unknown attribute \"%s\"", left); + return PAM_SERVICE_ERR; + } + if (debug) { + pam_syslog(pamh, LOG_DEBUG, "'%s' resolves to '%s'", + attribute, left); + } + + /* Attribute value < some threshold. */ + if ((strcasecmp(qual, "<") == 0) || + (strcasecmp(qual, "lt") == 0)) { + return evaluate_lt(pamh, left, right); + } + /* Attribute value <= some threshold. */ + if ((strcasecmp(qual, "<=") == 0) || + (strcasecmp(qual, "le") == 0)) { + return evaluate_le(pamh, left, right); + } + /* Attribute value > some threshold. */ + if ((strcasecmp(qual, ">") == 0) || + (strcasecmp(qual, "gt") == 0)) { + return evaluate_gt(pamh, left, right); + } + /* Attribute value >= some threshold. */ + if ((strcasecmp(qual, ">=") == 0) || + (strcasecmp(qual, "ge") == 0)) { + return evaluate_ge(pamh, left, right); + } + /* Attribute value == some threshold. */ + if (strcasecmp(qual, "eq") == 0) { + return evaluate_eqn(pamh, left, right); + } + /* Attribute value = some string. */ + if (strcasecmp(qual, "=") == 0) { + return evaluate_eqs(left, right); + } + /* Attribute value != some threshold. */ + if (strcasecmp(qual, "ne") == 0) { + return evaluate_nen(pamh, left, right); + } + /* Attribute value != some string. */ + if (strcasecmp(qual, "!=") == 0) { + return evaluate_nes(left, right); + } + /* Attribute value matches some pattern. */ + if ((strcasecmp(qual, "=~") == 0) || + (strcasecmp(qual, "glob") == 0)) { + return evaluate_glob(left, right); + } + if ((strcasecmp(qual, "!~") == 0) || + (strcasecmp(qual, "noglob") == 0)) { + return evaluate_noglob(left, right); + } + /* Attribute value matches item in list. */ + if (strcasecmp(qual, "in") == 0) { + return evaluate_inlist(left, right); + } + if (strcasecmp(qual, "notin") == 0) { + return evaluate_notinlist(left, right); + } + /* User is in this group. */ + if (strcasecmp(qual, "ingroup") == 0) { + return evaluate_ingroup(pamh, pwd->pw_name, right); + } + /* User is not in this group. */ + if (strcasecmp(qual, "notingroup") == 0) { + return evaluate_notingroup(pamh, pwd->pw_name, right); + } + /* (Rhost, user) is in this netgroup. */ + if (strcasecmp(qual, "innetgr") == 0) { + const void *rhost; + if (pam_get_item(pamh, PAM_RHOST, &rhost) != PAM_SUCCESS) + rhost = NULL; + return evaluate_innetgr(rhost, pwd->pw_name, right); + } + /* (Rhost, user) is not in this group. */ + if (strcasecmp(qual, "notinnetgr") == 0) { + const void *rhost; + if (pam_get_item(pamh, PAM_RHOST, &rhost) != PAM_SUCCESS) + rhost = NULL; + return evaluate_notinnetgr(rhost, pwd->pw_name, right); + } + /* Fail closed. */ + return PAM_SERVICE_ERR; +} + +PAM_EXTERN int +pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED, + int argc, const char **argv) +{ + const void *prompt; + const char *user; + struct passwd *pwd; + int ret, i, count, use_uid, debug; + const char *left, *right, *qual; + int quiet_fail, quiet_succ; + + /* Get the user prompt. */ + ret = pam_get_item(pamh, PAM_USER_PROMPT, &prompt); + if ((ret != PAM_SUCCESS) || (prompt == NULL) || (strlen(prompt) == 0)) { + prompt = "login: "; + } + + quiet_fail = 0; + quiet_succ = 0; + for (use_uid = 0, debug = 0, i = 0; i < argc; i++) { + if (strcmp(argv[i], "debug") == 0) { + debug++; + } + if (strcmp(argv[i], "use_uid") == 0) { + use_uid++; + } + if (strcmp(argv[i], "quiet") == 0) { + quiet_fail++; + quiet_succ++; + } + if (strcmp(argv[i], "quiet_fail") == 0) { + quiet_fail++; + } + if (strcmp(argv[i], "quiet_success") == 0) { + quiet_succ++; + } + } + + if (use_uid) { + /* Get information about the user. */ + pwd = pam_modutil_getpwuid(pamh, getuid()); + if (pwd == NULL) { + pam_syslog(pamh, LOG_CRIT, + "error retrieving information about user %lu", + (unsigned long)getuid()); + return PAM_USER_UNKNOWN; + } + user = pwd->pw_name; + } else { + /* Get the user's name. */ + ret = pam_get_user(pamh, &user, prompt); + if ((ret != PAM_SUCCESS) || (user == NULL)) { + pam_syslog(pamh, LOG_CRIT, + "error retrieving user name: %s", + pam_strerror(pamh, ret)); + return ret; + } + + /* Get information about the user. */ + pwd = pam_modutil_getpwnam(pamh, user); + if (pwd == NULL) { + pam_syslog(pamh, LOG_CRIT, + "error retrieving information about user %s", + user); + return PAM_USER_UNKNOWN; + } + } + + /* Walk the argument list. */ + i = count = 0; + left = qual = right = NULL; + while (i <= argc) { + if ((left != NULL) && (qual != NULL) && (right != NULL)) { + ret = evaluate(pamh, debug, + left, qual, right, + pwd); + if (ret != PAM_SUCCESS) { + if(!quiet_fail) + pam_syslog(pamh, LOG_INFO, + "requirement \"%s %s %s\" " + "not met by user \"%s\"", + left, qual, right, user); + break; + } + else + if(!quiet_succ) + pam_syslog(pamh, LOG_INFO, + "requirement \"%s %s %s\" " + "was met by user \"%s\"", + left, qual, right, user); + left = qual = right = NULL; + } + if ((i < argc) && (strcmp(argv[i], "debug") == 0)) { + i++; + continue; + } + if ((i < argc) && (strcmp(argv[i], "use_uid") == 0)) { + i++; + continue; + } + if ((i < argc) && (strcmp(argv[i], "quiet") == 0)) { + i++; + continue; + } + if ((i < argc) && (strcmp(argv[i], "quiet_fail") == 0)) { + i++; + continue; + } + if ((i < argc) && (strcmp(argv[i], "quiet_success") == 0)) { + i++; + continue; + } + if ((i < argc) && (left == NULL)) { + left = argv[i++]; + count++; + continue; + } + if ((i < argc) && (qual == NULL)) { + qual = argv[i++]; + count++; + continue; + } + if ((i < argc) && (right == NULL)) { + right = argv[i++]; + count++; + continue; + } + i++; + } + + return ret; +} + +PAM_EXTERN int +pam_sm_setcred(pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) +{ + return PAM_IGNORE; +} + +PAM_EXTERN int +pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv) +{ + return pam_sm_authenticate(pamh, flags, argc, argv); +} + +PAM_EXTERN int +pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv) +{ + return pam_sm_authenticate(pamh, flags, argc, argv); +} + +PAM_EXTERN int +pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, const char **argv) +{ + return pam_sm_authenticate(pamh, flags, argc, argv); +} + +PAM_EXTERN int +pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char **argv) +{ + return pam_sm_authenticate(pamh, flags, argc, argv); +} + +/* static module data */ +#ifdef PAM_STATIC +struct pam_module _pam_succeed_if_modstruct = { + "pam_succeed_if", + pam_sm_authenticate, + pam_sm_setcred, + pam_sm_acct_mgmt, + pam_sm_open_session, + pam_sm_close_session, + pam_sm_chauthtok +}; +#endif diff --git a/modules/pam_succeed_if/tst-pam_succeed_if b/modules/pam_succeed_if/tst-pam_succeed_if new file mode 100755 index 00000000..f2b6dd3f --- /dev/null +++ b/modules/pam_succeed_if/tst-pam_succeed_if @@ -0,0 +1,2 @@ +#!/bin/sh +../../tests/tst-dlopen .libs/pam_succeed_if.so |