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-rw-r--r--modules/pam_userdb/Makefile.am35
-rw-r--r--modules/pam_userdb/Makefile.in1155
-rw-r--r--modules/pam_userdb/README76
-rw-r--r--modules/pam_userdb/README.xml41
-rw-r--r--modules/pam_userdb/create.pl21
-rw-r--r--modules/pam_userdb/pam_userdb.8158
-rw-r--r--modules/pam_userdb/pam_userdb.8.xml294
-rw-r--r--modules/pam_userdb/pam_userdb.c517
-rw-r--r--modules/pam_userdb/pam_userdb.h59
-rwxr-xr-xmodules/pam_userdb/tst-pam_userdb2
10 files changed, 2358 insertions, 0 deletions
diff --git a/modules/pam_userdb/Makefile.am b/modules/pam_userdb/Makefile.am
new file mode 100644
index 0000000..aa70e7d
--- /dev/null
+++ b/modules/pam_userdb/Makefile.am
@@ -0,0 +1,35 @@
+#
+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@thkukuk.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = $(XMLS) create.pl
+
+if HAVE_DOC
+dist_man_MANS = pam_userdb.8
+endif
+XMLS = README.xml pam_userdb.8.xml
+dist_check_SCRIPTS = tst-pam_userdb
+TESTS = $(dist_check_SCRIPTS)
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ $(WARN_CFLAGS)
+AM_LDFLAGS = -no-undefined -avoid-version -module @LIBDB@ @LIBCRYPT@
+if HAVE_VERSIONING
+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_userdb.la
+pam_userdb_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+noinst_HEADERS = pam_userdb.h
+
+if ENABLE_REGENERATE_MAN
+dist_noinst_DATA = README
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_userdb/Makefile.in b/modules/pam_userdb/Makefile.in
new file mode 100644
index 0000000..6eb785f
--- /dev/null
+++ b/modules/pam_userdb/Makefile.in
@@ -0,0 +1,1155 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 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.
+
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+distdir: $(BUILT_SOURCES)
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+distdir-am: $(DISTFILES)
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+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
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+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+distclean-generic:
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+# 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.
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diff --git a/modules/pam_userdb/README b/modules/pam_userdb/README
new file mode 100644
index 0000000..9d931bb
--- /dev/null
+++ b/modules/pam_userdb/README
@@ -0,0 +1,76 @@
+pam_userdb — PAM module to authenticate against a db database
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+The pam_userdb module is used to verify a username/password pair against values
+stored in a Berkeley DB database. The database is indexed by the username, and
+the data fields corresponding to the username keys are the passwords.
+
+OPTIONS
+
+crypt=[crypt|none]
+
+ Indicates whether encrypted or plaintext passwords are stored in the
+ database. If it is crypt, passwords should be stored in the database in
+ crypt(3) form. If none is selected, passwords should be stored in the
+ database as plaintext.
+
+db=/path/database
+
+ Use the /path/database database for performing lookup. There is no default;
+ the module will return PAM_IGNORE if no database is provided. Note that the
+ path to the database file should be specified without the .db suffix.
+
+debug
+
+ Print debug information. Note that password hashes, both from db and
+ computed, will be printed to syslog.
+
+dump
+
+ Dump all the entries in the database to the log. Don't do this by default!
+
+icase
+
+ Make the password verification to be case insensitive (ie when working with
+ registration numbers and such). Only works with plaintext password storage.
+
+try_first_pass
+
+ Use the authentication token previously obtained by another module that did
+ the conversation with the application. If this token can not be obtained
+ then the module will try to converse. This option can be used for stacking
+ different modules that need to deal with the authentication tokens.
+
+use_first_pass
+
+ Use the authentication token previously obtained by another module that did
+ the conversation with the application. If this token can not be obtained
+ then the module will fail. This option can be used for stacking different
+ modules that need to deal with the authentication tokens.
+
+unknown_ok
+
+ Do not return error when checking for a user that is not in the database.
+ This can be used to stack more than one pam_userdb module that will check a
+ username/password pair in more than a database.
+
+key_only
+
+ The username and password are concatenated together in the database hash as
+ 'username-password' with a random value. if the concatenation of the
+ username and password with a dash in the middle returns any result, the
+ user is valid. this is useful in cases where the username may not be unique
+ but the username and password pair are.
+
+EXAMPLES
+
+auth sufficient pam_userdb.so icase db=/etc/dbtest
+
+
+AUTHOR
+
+pam_userdb was written by Cristian Gafton >gafton@redhat.com<.
+
diff --git a/modules/pam_userdb/README.xml b/modules/pam_userdb/README.xml
new file mode 100644
index 0000000..b22c09e
--- /dev/null
+++ b/modules/pam_userdb/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_userdb.8.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_userdb.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_userdb-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_userdb.8.xml" xpointer='xpointer(//refsect1[@id = "pam_userdb-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_userdb.8.xml" xpointer='xpointer(//refsect1[@id = "pam_userdb-options"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_userdb.8.xml" xpointer='xpointer(//refsect1[@id = "pam_userdb-examples"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_userdb.8.xml" xpointer='xpointer(//refsect1[@id = "pam_userdb-author"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_userdb/create.pl b/modules/pam_userdb/create.pl
new file mode 100644
index 0000000..06915c9
--- /dev/null
+++ b/modules/pam_userdb/create.pl
@@ -0,0 +1,21 @@
+#!/usr/bin/perl
+# this program creates a database in ARGV[1] from pairs given on
+# stdandard input
+#
+# $Id$
+
+use DB_File;
+
+my $database = $ARGV[0];
+die "Use: create.pl <database>\n" unless ($database);
+print "Using database: $database\n";
+
+my %lusers = ();
+
+tie %lusers, 'DB_File', $database, O_RDWR|O_CREAT, 0644, $DB_HASH ;
+while (<STDIN>) {
+ my ($user, $pass) = split;
+
+ $lusers{$user} = $pass;
+}
+untie %lusers;
diff --git a/modules/pam_userdb/pam_userdb.8 b/modules/pam_userdb/pam_userdb.8
new file mode 100644
index 0000000..fc00278
--- /dev/null
+++ b/modules/pam_userdb/pam_userdb.8
@@ -0,0 +1,158 @@
+'\" t
+.\" Title: pam_userdb
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
+.\" Date: 09/03/2021
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_USERDB" "8" "09/03/2021" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+pam_userdb \- PAM module to authenticate against a db database
+.SH "SYNOPSIS"
+.HP \w'\fBpam_userdb\&.so\fR\ 'u
+\fBpam_userdb\&.so\fR db=\fI/path/database\fR [debug] [crypt=[crypt|none]] [icase] [dump] [try_first_pass] [use_first_pass] [unknown_ok] [key_only]
+.SH "DESCRIPTION"
+.PP
+The pam_userdb module is used to verify a username/password pair against values stored in a Berkeley DB database\&. The database is indexed by the username, and the data fields corresponding to the username keys are the passwords\&.
+.SH "OPTIONS"
+.PP
+\fBcrypt=[crypt|none]\fR
+.RS 4
+Indicates whether encrypted or plaintext passwords are stored in the database\&. If it is
+\fBcrypt\fR, passwords should be stored in the database in
+\fBcrypt\fR(3)
+form\&. If
+\fBnone\fR
+is selected, passwords should be stored in the database as plaintext\&.
+.RE
+.PP
+\fBdb=\fR\fB\fI/path/database\fR\fR
+.RS 4
+Use the
+/path/database
+database for performing lookup\&. There is no default; the module will return
+\fBPAM_IGNORE\fR
+if no database is provided\&. Note that the path to the database file should be specified without the
+\&.db
+suffix\&.
+.RE
+.PP
+\fBdebug\fR
+.RS 4
+Print debug information\&. Note that password hashes, both from db and computed, will be printed to syslog\&.
+.RE
+.PP
+\fBdump\fR
+.RS 4
+Dump all the entries in the database to the log\&. Don\*(Aqt do this by default!
+.RE
+.PP
+\fBicase\fR
+.RS 4
+Make the password verification to be case insensitive (ie when working with registration numbers and such)\&. Only works with plaintext password storage\&.
+.RE
+.PP
+\fBtry_first_pass\fR
+.RS 4
+Use the authentication token previously obtained by another module that did the conversation with the application\&. If this token can not be obtained then the module will try to converse\&. This option can be used for stacking different modules that need to deal with the authentication tokens\&.
+.RE
+.PP
+\fBuse_first_pass\fR
+.RS 4
+Use the authentication token previously obtained by another module that did the conversation with the application\&. If this token can not be obtained then the module will fail\&. This option can be used for stacking different modules that need to deal with the authentication tokens\&.
+.RE
+.PP
+\fBunknown_ok\fR
+.RS 4
+Do not return error when checking for a user that is not in the database\&. This can be used to stack more than one pam_userdb module that will check a username/password pair in more than a database\&.
+.RE
+.PP
+\fBkey_only\fR
+.RS 4
+The username and password are concatenated together in the database hash as \*(Aqusername\-password\*(Aq with a random value\&. if the concatenation of the username and password with a dash in the middle returns any result, the user is valid\&. this is useful in cases where the username may not be unique but the username and password pair are\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+The
+\fBauth\fR
+and
+\fBaccount\fR
+module types are provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_AUTH_ERR
+.RS 4
+Authentication failure\&.
+.RE
+.PP
+PAM_AUTHTOK_RECOVERY_ERR
+.RS 4
+Authentication information cannot be recovered\&.
+.RE
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_CONV_ERR
+.RS 4
+Conversation failure\&.
+.RE
+.PP
+PAM_SERVICE_ERR
+.RS 4
+Error in service module\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Success\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known to the underlying authentication module\&.
+.RE
+.SH "EXAMPLES"
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+auth sufficient pam_userdb\&.so icase db=/etc/dbtest
+
+.fi
+.if n \{\
+.RE
+.\}
+.SH "SEE ALSO"
+.PP
+\fBcrypt\fR(3),
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHOR"
+.PP
+pam_userdb was written by Cristian Gafton >gafton@redhat\&.com<\&.
diff --git a/modules/pam_userdb/pam_userdb.8.xml b/modules/pam_userdb/pam_userdb.8.xml
new file mode 100644
index 0000000..bce9285
--- /dev/null
+++ b/modules/pam_userdb/pam_userdb.8.xml
@@ -0,0 +1,294 @@
+<?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_userdb">
+
+ <refmeta>
+ <refentrytitle>pam_userdb</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id="pam_userdb-name">
+ <refname>pam_userdb</refname>
+ <refpurpose>PAM module to authenticate against a db database</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_userdb-cmdsynopsis">
+ <command>pam_userdb.so</command>
+ <arg choice="plain">
+ db=<replaceable>/path/database</replaceable>
+ </arg>
+ <arg choice="opt">
+ debug
+ </arg>
+ <arg choice="opt">
+ crypt=[crypt|none]
+ </arg>
+ <arg choice="opt">
+ icase
+ </arg>
+ <arg choice="opt">
+ dump
+ </arg>
+ <arg choice="opt">
+ try_first_pass
+ </arg>
+ <arg choice="opt">
+ use_first_pass
+ </arg>
+ <arg choice="opt">
+ unknown_ok
+ </arg>
+ <arg choice="opt">
+ key_only
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id="pam_userdb-description">
+
+ <title>DESCRIPTION</title>
+
+ <para>
+ The pam_userdb module is used to verify a username/password pair
+ against values stored in a Berkeley DB database. The database is
+ indexed by the username, and the data fields corresponding to the
+ username keys are the passwords.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_userdb-options">
+
+ <title>OPTIONS</title>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>crypt=[crypt|none]</option>
+ </term>
+ <listitem>
+ <para>
+ Indicates whether encrypted or plaintext passwords are stored
+ in the database. If it is <option>crypt</option>, passwords
+ should be stored in the database in
+ <citerefentry>
+ <refentrytitle>crypt</refentrytitle><manvolnum>3</manvolnum>
+ </citerefentry> form. If <option>none</option> is selected,
+ passwords should be stored in the database as plaintext.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>db=<replaceable>/path/database</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Use the <filename>/path/database</filename> database for
+ performing lookup. There is no default; the module will
+ return <emphasis remap='B'>PAM_IGNORE</emphasis> if no
+ database is provided. Note that the path to the database file
+ should be specified without the <filename>.db</filename> suffix.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>debug</option>
+ </term>
+ <listitem>
+ <para>
+ Print debug information. Note that password hashes, both from db
+ and computed, will be printed to syslog.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>dump</option>
+ </term>
+ <listitem>
+ <para>
+ Dump all the entries in the database to the log.
+ Don't do this by default!
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>icase</option>
+ </term>
+ <listitem>
+ <para>
+ Make the password verification to be case insensitive
+ (ie when working with registration numbers and such).
+ Only works with plaintext password storage.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>try_first_pass</option>
+ </term>
+ <listitem>
+ <para>
+ Use the authentication token previously obtained by
+ another module that did the conversation with the
+ application. If this token can not be obtained then
+ the module will try to converse. This option can
+ be used for stacking different modules that need to
+ deal with the authentication tokens.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>use_first_pass</option>
+ </term>
+ <listitem>
+ <para>
+ Use the authentication token previously obtained by
+ another module that did the conversation with the
+ application. If this token can not be obtained then
+ the module will fail. This option can be used for
+ stacking different modules that need to deal with
+ the authentication tokens.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>unknown_ok</option>
+ </term>
+ <listitem>
+ <para>
+ Do not return error when checking for a user that is
+ not in the database. This can be used to stack more
+ than one pam_userdb module that will check a
+ username/password pair in more than a database.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>key_only</option>
+ </term>
+ <listitem>
+ <para>
+ The username and password are concatenated together
+ in the database hash as 'username-password' with a
+ random value. if the concatenation of the username and
+ password with a dash in the middle returns any result,
+ the user is valid. this is useful in cases where
+ the username may not be unique but the username and
+ password pair are.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_userdb-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ The <option>auth</option> and <option>account</option> module
+ types are provided.
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_userdb-return_values'>
+ <title>RETURN VALUES</title>
+ <variablelist>
+ <varlistentry>
+ <term>PAM_AUTH_ERR</term>
+ <listitem>
+ <para>Authentication failure.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_AUTHTOK_RECOVERY_ERR</term>
+ <listitem>
+ <para>
+ Authentication information cannot be recovered.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_BUF_ERR</term>
+ <listitem>
+ <para>
+ Memory buffer error.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_CONV_ERR</term>
+ <listitem>
+ <para>
+ Conversation failure.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_SERVICE_ERR</term>
+ <listitem>
+ <para>
+ Error in service module.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Success.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_USER_UNKNOWN</term>
+ <listitem>
+ <para>
+ User not known to the underlying authentication module.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='pam_userdb-examples'>
+ <title>EXAMPLES</title>
+ <programlisting>
+auth sufficient pam_userdb.so icase db=/etc/dbtest
+ </programlisting>
+ </refsect1>
+
+ <refsect1 id='pam_userdb-see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>crypt</refentrytitle><manvolnum>3</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_userdb-author'>
+ <title>AUTHOR</title>
+ <para>
+ pam_userdb was written by Cristian Gafton &gt;gafton@redhat.com&lt;.
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/modules/pam_userdb/pam_userdb.c b/modules/pam_userdb/pam_userdb.c
new file mode 100644
index 0000000..f467ea4
--- /dev/null
+++ b/modules/pam_userdb/pam_userdb.c
@@ -0,0 +1,517 @@
+/*
+ * pam_userdb module
+ *
+ * Written by Cristian Gafton <gafton@redhat.com> 1996/09/10
+ * See the end of the file for Copyright Information
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifdef HAVE_CRYPT_H
+#include <crypt.h>
+#endif
+
+#include "pam_userdb.h"
+
+#ifdef HAVE_NDBM_H
+# include <ndbm.h>
+#else
+# ifdef HAVE_DB_H
+# define DB_DBM_HSEARCH 1 /* use the dbm interface */
+# define HAVE_DBM /* for BerkDB 5.0 and later */
+# include <db.h>
+# else
+# error "failed to find a libdb or equivalent"
+# endif
+#endif
+
+#include <security/pam_modules.h>
+#include <security/pam_ext.h>
+#include <security/_pam_macros.h>
+#include "pam_inline.h"
+
+/*
+ * Conversation function to obtain the user's password
+ */
+static int
+obtain_authtok(pam_handle_t *pamh)
+{
+ char *resp;
+ const void *item;
+ int retval;
+
+ retval = pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &resp, _("Password: "));
+
+ if (retval != PAM_SUCCESS)
+ return retval;
+
+ if (resp == NULL)
+ return PAM_CONV_ERR;
+
+ /* set the auth token */
+ retval = pam_set_item(pamh, PAM_AUTHTOK, resp);
+
+ /* clean it up */
+ _pam_overwrite(resp);
+ _pam_drop(resp);
+
+ if ( (retval != PAM_SUCCESS) ||
+ (retval = pam_get_item(pamh, PAM_AUTHTOK, &item))
+ != PAM_SUCCESS ) {
+ return retval;
+ }
+
+ return retval;
+}
+
+static int
+_pam_parse (pam_handle_t *pamh, int argc, const char **argv,
+ const char **database, const char **cryptmode)
+{
+ int ctrl;
+
+ *database = NULL;
+ *cryptmode = NULL;
+
+ /* step through arguments */
+ for (ctrl = 0; argc-- > 0; ++argv)
+ {
+ const char *str;
+
+ /* generic options */
+
+ if (!strcmp(*argv,"debug"))
+ ctrl |= PAM_DEBUG_ARG;
+ else if (!strcasecmp(*argv, "icase"))
+ ctrl |= PAM_ICASE_ARG;
+ else if (!strcasecmp(*argv, "dump"))
+ ctrl |= PAM_DUMP_ARG;
+ else if (!strcasecmp(*argv, "unknown_ok"))
+ ctrl |= PAM_UNKNOWN_OK_ARG;
+ else if (!strcasecmp(*argv, "key_only"))
+ ctrl |= PAM_KEY_ONLY_ARG;
+ else if (!strcasecmp(*argv, "use_first_pass"))
+ ctrl |= PAM_USE_FPASS_ARG;
+ else if (!strcasecmp(*argv, "try_first_pass"))
+ ctrl |= PAM_TRY_FPASS_ARG;
+ else if ((str = pam_str_skip_icase_prefix(*argv, "db=")) != NULL)
+ {
+ *database = str;
+ if (**database == '\0') {
+ *database = NULL;
+ pam_syslog(pamh, LOG_ERR,
+ "db= specification missing argument - ignored");
+ }
+ }
+ else if ((str = pam_str_skip_icase_prefix(*argv, "crypt=")) != NULL)
+ {
+ *cryptmode = str;
+ if (**cryptmode == '\0')
+ pam_syslog(pamh, LOG_ERR,
+ "crypt= specification missing argument - ignored");
+ }
+ else
+ {
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+ }
+
+ return ctrl;
+}
+
+
+/*
+ * Looks up a user name in a database and checks the password
+ *
+ * return values:
+ * 1 = User not found
+ * 0 = OK
+ * -1 = Password incorrect
+ * -2 = System error
+ */
+static int
+user_lookup (pam_handle_t *pamh, const char *database, const char *cryptmode,
+ const char *user, const char *pass, int ctrl)
+{
+ DBM *dbm;
+ datum key, data;
+
+ /* Open the DB file. */
+ dbm = dbm_open(database, O_RDONLY, 0644);
+ if (dbm == NULL) {
+ pam_syslog(pamh, LOG_ERR,
+ "user_lookup: could not open database `%s': %m", database);
+ return -2;
+ }
+
+ /* dump out the database contents for debugging */
+ if (ctrl & PAM_DUMP_ARG) {
+ pam_syslog(pamh, LOG_INFO, "Database dump:");
+ for (key = dbm_firstkey(dbm); key.dptr != NULL;
+ key = dbm_nextkey(dbm)) {
+ data = dbm_fetch(dbm, key);
+ pam_syslog(pamh, LOG_INFO,
+ "key[len=%d] = `%s', data[len=%d] = `%s'",
+ key.dsize, key.dptr, data.dsize, data.dptr);
+ }
+ }
+
+ /* do some more init work */
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ if (ctrl & PAM_KEY_ONLY_ARG) {
+ if (asprintf(&key.dptr, "%s-%s", user, pass) < 0)
+ key.dptr = NULL;
+ else
+ key.dsize = strlen(key.dptr);
+ } else {
+ key.dptr = strdup(user);
+ key.dsize = strlen(user);
+ }
+
+ if (key.dptr) {
+ data = dbm_fetch(dbm, key);
+ memset(key.dptr, 0, key.dsize);
+ free(key.dptr);
+ }
+
+ if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_INFO,
+ "password in database is [%p]`%.*s', len is %d",
+ data.dptr, data.dsize, (char *) data.dptr, data.dsize);
+ }
+
+ if (data.dptr != NULL) {
+ int compare = -2;
+
+ if (ctrl & PAM_KEY_ONLY_ARG)
+ {
+ dbm_close (dbm);
+ return 0; /* found it, data contents don't matter */
+ }
+
+ if (cryptmode && pam_str_skip_icase_prefix(cryptmode, "crypt") != NULL) {
+
+ /* crypt(3) password storage */
+
+ char *cryptpw = NULL;
+
+ if (data.dsize < 13) {
+ /* hash is too short */
+ pam_syslog(pamh, LOG_INFO, "password hash in database is too short");
+ } else if (ctrl & PAM_ICASE_ARG) {
+ pam_syslog(pamh, LOG_INFO,
+ "case-insensitive comparison only works with plaintext passwords");
+ } else {
+ /* libdb is not guaranteed to produce null terminated strings */
+ char *pwhash = strndup(data.dptr, data.dsize);
+
+ if (pwhash == NULL) {
+ pam_syslog(pamh, LOG_CRIT, "strndup failed: data.dptr");
+ } else {
+#ifdef HAVE_CRYPT_R
+ struct crypt_data *cdata = NULL;
+ cdata = malloc(sizeof(*cdata));
+ if (cdata == NULL) {
+ pam_syslog(pamh, LOG_CRIT, "malloc failed: struct crypt_data");
+ } else {
+ cdata->initialized = 0;
+ cryptpw = crypt_r(pass, pwhash, cdata);
+ }
+#else
+ cryptpw = crypt (pass, pwhash);
+#endif
+ if (cryptpw && strlen(cryptpw) == (size_t)data.dsize) {
+ compare = memcmp(data.dptr, cryptpw, data.dsize);
+ } else {
+ if (ctrl & PAM_DEBUG_ARG) {
+ if (cryptpw) {
+ pam_syslog(pamh, LOG_INFO, "lengths of computed and stored hashes differ");
+ pam_syslog(pamh, LOG_INFO, "computed hash: %s", cryptpw);
+ } else {
+ pam_syslog(pamh, LOG_ERR, "crypt() returned NULL");
+ }
+ }
+ }
+#ifdef HAVE_CRYPT_R
+ free(cdata);
+#endif
+ }
+ free(pwhash);
+ }
+ } else {
+
+ /* Unknown password encryption method -
+ * default to plaintext password storage
+ */
+
+ if (strlen(pass) != (size_t)data.dsize) {
+ compare = 1; /* wrong password len -> wrong password */
+ } else if (ctrl & PAM_ICASE_ARG) {
+ compare = strncasecmp(data.dptr, pass, data.dsize);
+ } else {
+ compare = strncmp(data.dptr, pass, data.dsize);
+ }
+
+ if (cryptmode && pam_str_skip_icase_prefix(cryptmode, "none") == NULL
+ && (ctrl & PAM_DEBUG_ARG)) {
+ pam_syslog(pamh, LOG_INFO, "invalid value for crypt parameter: %s",
+ cryptmode);
+ pam_syslog(pamh, LOG_INFO, "defaulting to plaintext password mode");
+ }
+
+ }
+
+ dbm_close(dbm);
+ if (compare == 0)
+ return 0; /* match */
+ else
+ return -1; /* wrong */
+ } else {
+ int saw_user = 0;
+
+ if (ctrl & PAM_DEBUG_ARG) {
+ pam_syslog(pamh, LOG_INFO, "error returned by dbm_fetch: %m");
+ }
+
+ /* probably we should check dbm_error() here */
+
+ if ((ctrl & PAM_KEY_ONLY_ARG) == 0) {
+ dbm_close(dbm);
+ return 1; /* not key_only, so no entry => no entry for the user */
+ }
+
+ /* now handle the key_only case */
+ for (key = dbm_firstkey(dbm);
+ key.dptr != NULL;
+ key = dbm_nextkey(dbm)) {
+ int compare;
+ /* first compare the user portion (case sensitive) */
+ compare = strncmp(key.dptr, user, strlen(user));
+ if (compare == 0) {
+ /* assume failure */
+ compare = -1;
+ /* if we have the divider where we expect it to be... */
+ if (key.dptr[strlen(user)] == '-') {
+ saw_user = 1;
+ if ((size_t)key.dsize == strlen(user) + 1 + strlen(pass)) {
+ if (ctrl & PAM_ICASE_ARG) {
+ /* compare the password portion (case insensitive)*/
+ compare = strncasecmp(key.dptr + strlen(user) + 1,
+ pass,
+ strlen(pass));
+ } else {
+ /* compare the password portion (case sensitive) */
+ compare = strncmp(key.dptr + strlen(user) + 1,
+ pass,
+ strlen(pass));
+ }
+ }
+ }
+ if (compare == 0) {
+ dbm_close(dbm);
+ return 0; /* match */
+ }
+ }
+ }
+ dbm_close(dbm);
+ if (saw_user)
+ return -1; /* saw the user, but password mismatch */
+ else
+ return 1; /* not found */
+ }
+
+ /* NOT REACHED */
+ return -2;
+}
+
+/* --- authentication management functions (only) --- */
+
+int
+pam_sm_authenticate(pam_handle_t *pamh, int flags UNUSED,
+ int argc, const char **argv)
+{
+ const char *username;
+ const void *password;
+ const char *database = NULL;
+ const char *cryptmode = NULL;
+ int retval = PAM_AUTH_ERR, ctrl;
+
+ /* parse arguments */
+ ctrl = _pam_parse(pamh, argc, argv, &database, &cryptmode);
+ if (database == NULL) {
+ pam_syslog(pamh, LOG_ERR, "can not get the database name");
+ return PAM_SERVICE_ERR;
+ }
+
+ /* Get the username */
+ retval = pam_get_user(pamh, &username, NULL);
+ if (retval != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_NOTICE, "cannot determine user name: %s",
+ pam_strerror(pamh, retval));
+ return PAM_SERVICE_ERR;
+ }
+
+ if ((ctrl & PAM_USE_FPASS_ARG) == 0 && (ctrl & PAM_TRY_FPASS_ARG) == 0) {
+ /* Converse to obtain a password */
+ retval = obtain_authtok(pamh);
+ if (retval != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_ERR, "can not obtain password from user");
+ return retval;
+ }
+ }
+
+ /* Check if we got a password */
+ retval = pam_get_item(pamh, PAM_AUTHTOK, &password);
+ if (retval != PAM_SUCCESS || password == NULL) {
+ if ((ctrl & PAM_TRY_FPASS_ARG) != 0) {
+ /* Converse to obtain a password */
+ retval = obtain_authtok(pamh);
+ if (retval != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_ERR, "can not obtain password from user");
+ return retval;
+ }
+ retval = pam_get_item(pamh, PAM_AUTHTOK, &password);
+ }
+ if (retval != PAM_SUCCESS || password == NULL) {
+ pam_syslog(pamh, LOG_ERR, "can not recover user password");
+ return PAM_AUTHTOK_RECOVERY_ERR;
+ }
+ }
+
+ if (ctrl & PAM_DEBUG_ARG)
+ pam_syslog(pamh, LOG_INFO, "Verify user `%s' with a password",
+ username);
+
+ /* Now use the username to look up password in the database file */
+ retval = user_lookup(pamh, database, cryptmode, username, password, ctrl);
+ switch (retval) {
+ case -2:
+ /* some sort of system error. The log was already printed */
+ return PAM_SERVICE_ERR;
+ case -1:
+ /* incorrect password */
+ pam_syslog(pamh, LOG_NOTICE,
+ "user `%s' denied access (incorrect password)",
+ username);
+ return PAM_AUTH_ERR;
+ case 1:
+ /* the user does not exist in the database */
+ if (ctrl & PAM_DEBUG_ARG)
+ pam_syslog(pamh, LOG_NOTICE,
+ "user `%s' not found in the database", username);
+ return PAM_USER_UNKNOWN;
+ case 0:
+ /* Otherwise, the authentication looked good */
+ pam_syslog(pamh, LOG_NOTICE, "user '%s' granted access", username);
+ return PAM_SUCCESS;
+ default:
+ /* we don't know anything about this return value */
+ pam_syslog(pamh, LOG_ERR,
+ "internal module error (retval = %d, user = `%s'",
+ retval, username);
+ return PAM_SERVICE_ERR;
+ }
+
+ /* should not be reached */
+ return PAM_IGNORE;
+}
+
+int
+pam_sm_setcred(pam_handle_t *pamh UNUSED, int flags UNUSED,
+ int argc UNUSED, const char **argv UNUSED)
+{
+ return PAM_SUCCESS;
+}
+
+int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags UNUSED,
+ int argc, const char **argv)
+{
+ const char *username;
+ const char *database = NULL;
+ const char *cryptmode = NULL;
+ int retval = PAM_AUTH_ERR, ctrl;
+
+ /* parse arguments */
+ ctrl = _pam_parse(pamh, argc, argv, &database, &cryptmode);
+
+ /* Get the username */
+ retval = pam_get_user(pamh, &username, NULL);
+ if (retval != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_NOTICE, "cannot determine user name: %s",
+ pam_strerror(pamh, retval));
+ return PAM_SERVICE_ERR;
+ }
+
+ /* Now use the username to look up password in the database file */
+ retval = user_lookup(pamh, database, cryptmode, username, "", ctrl);
+ switch (retval) {
+ case -2:
+ /* some sort of system error. The log was already printed */
+ return PAM_SERVICE_ERR;
+ case -1:
+ /* incorrect password, but we don't care */
+ /* FALL THROUGH */
+ case 0:
+ /* authentication succeeded. dumbest password ever. */
+ return PAM_SUCCESS;
+ case 1:
+ /* the user does not exist in the database */
+ return PAM_USER_UNKNOWN;
+ default:
+ /* we don't know anything about this return value */
+ pam_syslog(pamh, LOG_ERR,
+ "internal module error (retval = %d, user = `%s'",
+ retval, username);
+ return PAM_SERVICE_ERR;
+ }
+
+ return PAM_SUCCESS;
+}
+
+/*
+ * Copyright (c) Cristian Gafton <gafton@redhat.com>, 1999
+ * All rights reserved
+ *
+ * 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.
+ */
diff --git a/modules/pam_userdb/pam_userdb.h b/modules/pam_userdb/pam_userdb.h
new file mode 100644
index 0000000..86e9b47
--- /dev/null
+++ b/modules/pam_userdb/pam_userdb.h
@@ -0,0 +1,59 @@
+
+#ifndef _PAM_USERSDB_H
+#define _PAM_USERSDB_H
+/* $Id$ */
+
+/* Header files */
+#include <security/pam_appl.h>
+
+/* argument parsing */
+#define PAM_DEBUG_ARG 0x0001
+#define PAM_ICASE_ARG 0x0002
+#define PAM_DUMP_ARG 0x0004
+#define PAM_UNKNOWN_OK_ARG 0x0010
+#define PAM_KEY_ONLY_ARG 0x0020
+#define PAM_USE_FPASS_ARG 0x0040
+#define PAM_TRY_FPASS_ARG 0x0080
+
+/* The name of the module we are compiling */
+#ifndef MODULE_NAME
+#define MODULE_NAME "pam_userdb"
+#endif /* MODULE_NAME */
+
+#endif /* _PAM_USERSDB_H */
+
+/*
+ * Copyright (c) Cristian Gafton <gafton@redhat.com>, 1999
+ * All rights reserved
+ *
+ * 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.
+ */
diff --git a/modules/pam_userdb/tst-pam_userdb b/modules/pam_userdb/tst-pam_userdb
new file mode 100755
index 0000000..5d5eb19
--- /dev/null
+++ b/modules/pam_userdb/tst-pam_userdb
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_userdb.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 08:47:27 +0000