713 lines
21 KiB
Diff
713 lines
21 KiB
Diff
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diff -up Linux-PAM-1.3.1/configure.ac.pam-usertype Linux-PAM-1.3.1/configure.ac
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--- Linux-PAM-1.3.1/configure.ac.pam-usertype 2020-05-15 10:03:27.247468160 +0200
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+++ Linux-PAM-1.3.1/configure.ac 2020-05-15 10:03:27.270468089 +0200
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@@ -606,6 +606,27 @@ AC_SUBST([HAVE_KEY_MANAGEMENT], $HAVE_KE
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AM_CONDITIONAL([HAVE_KEY_MANAGEMENT], [test "$have_key_syscalls" = 1])
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+dnl
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+dnl Get values for default uid ranges in login.defs used in pam_usertype
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+dnl
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+AC_ARG_WITH([uidmin], AS_HELP_STRING([--with-uidmin=<number>],[default value for regular user min uid (1000)]), opt_uidmin=$withval)
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+if test x"$opt_uidmin" == x; then
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+ opt_uidmin=1000
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+fi
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+AC_DEFINE_UNQUOTED(PAM_USERTYPE_UIDMIN, $opt_uidmin, [Minimum regular user uid.])
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+
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+AC_ARG_WITH([sysuidmin], AS_HELP_STRING([--with-sysuidmin=<number>],[default value for system user min uid (101)]), opt_sysuidmin=$withval)
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+if test x"$opt_sysuidmin" == x; then
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+ opt_sysuidmin=101
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+fi
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+AC_DEFINE_UNQUOTED(PAM_USERTYPE_SYSUIDMIN, $opt_sysuidmin, [Minimum system user uid.])
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+
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+AC_ARG_WITH([kerneloverflowuid], AS_HELP_STRING([--with-kernel-overflow-uid=<number>],[kernel overflow uid, default (uint16_t)-2=65534]), opt_kerneloverflowuid=$withval)
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+if test x"$opt_kerneloverflowuid" == x; then
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+ opt_kerneloverflowuid=65534
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+fi
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+AC_DEFINE_UNQUOTED(PAM_USERTYPE_OVERFLOW_UID, $opt_kerneloverflowuid, [Kernel overflow uid.])
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+
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dnl Files to be created from when we run configure
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AC_CONFIG_FILES([Makefile libpam/Makefile libpamc/Makefile libpamc/test/Makefile \
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libpam_misc/Makefile conf/Makefile conf/pam_conv1/Makefile \
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@@ -636,6 +657,7 @@ AC_CONFIG_FILES([Makefile libpam/Makefil
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modules/pam_timestamp/Makefile modules/pam_tty_audit/Makefile \
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modules/pam_umask/Makefile \
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modules/pam_unix/Makefile modules/pam_userdb/Makefile \
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+ modules/pam_usertype/Makefile \
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modules/pam_warn/Makefile modules/pam_wheel/Makefile \
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modules/pam_xauth/Makefile doc/Makefile doc/specs/Makefile \
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doc/man/Makefile doc/sag/Makefile doc/adg/Makefile \
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diff -up Linux-PAM-1.3.1/modules/Makefile.am.pam-usertype Linux-PAM-1.3.1/modules/Makefile.am
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--- Linux-PAM-1.3.1/modules/Makefile.am.pam-usertype 2020-05-15 10:03:27.247468160 +0200
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+++ Linux-PAM-1.3.1/modules/Makefile.am 2020-05-15 10:03:27.270468089 +0200
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@@ -12,7 +12,7 @@ SUBDIRS = pam_access pam_cracklib pam_de
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pam_selinux pam_sepermit pam_shells pam_stress \
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pam_succeed_if pam_time pam_timestamp \
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pam_tty_audit pam_umask \
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- pam_unix pam_userdb pam_warn pam_wheel pam_xauth
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+ pam_unix pam_userdb pam_usertype pam_warn pam_wheel pam_xauth
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CLEANFILES = *~
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diff -up Linux-PAM-1.3.1/modules/pam_usertype/Makefile.am.pam-usertype Linux-PAM-1.3.1/modules/pam_usertype/Makefile.am
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--- Linux-PAM-1.3.1/modules/pam_usertype/Makefile.am.pam-usertype 2020-05-15 10:03:27.270468089 +0200
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+++ Linux-PAM-1.3.1/modules/pam_usertype/Makefile.am 2020-05-15 10:03:27.270468089 +0200
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@@ -0,0 +1,34 @@
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+#
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+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@suse.de>
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+# Copyright (c) 2020 Red Hat, Inc.
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+#
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+
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+CLEANFILES = *~
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+MAINTAINERCLEANFILES = $(MANS) README
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+
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+EXTRA_DIST = README ${MANS} ${XMLS} tst-pam_usertype
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+
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+TESTS = tst-pam_usertype
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+
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+man_MANS = pam_usertype.8
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+
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+XMLS = README.xml pam_usertype.8.xml
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+
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+securelibdir = $(SECUREDIR)
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+secureconfdir = $(SCONFIGDIR)
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+
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+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
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+ $(WARN_CFLAGS)
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+AM_LDFLAGS = -no-undefined -avoid-version -module
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+if HAVE_VERSIONING
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+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
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+endif
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+
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+securelib_LTLIBRARIES = pam_usertype.la
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+pam_usertype_la_LIBADD = $(top_builddir)/libpam/libpam.la
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+
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+if ENABLE_REGENERATE_MAN
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+noinst_DATA = README
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+README: pam_usertype.8.xml
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+-include $(top_srcdir)/Make.xml.rules
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+endif
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diff -up Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.8.xml.pam-usertype Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.8.xml
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--- Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.8.xml.pam-usertype 2020-05-15 10:03:27.270468089 +0200
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+++ Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.8.xml 2020-05-15 10:03:27.270468089 +0200
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@@ -0,0 +1,170 @@
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+<?xml version="1.0" encoding='UTF-8'?>
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+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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+ "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
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+
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+
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+<refentry id='pam_usertype'>
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+ <refmeta>
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+ <refentrytitle>pam_usertype</refentrytitle>
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+ <manvolnum>8</manvolnum>
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+ <refmiscinfo class='sectdesc'>Linux-PAM</refmiscinfo>
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+ </refmeta>
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+
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+ <refnamediv id='pam_usertype-name'>
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+ <refname>pam_usertype</refname>
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+ <refpurpose>check if the authenticated user is a system or regular account</refpurpose>
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+ </refnamediv>
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+
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+
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+ <refsynopsisdiv>
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+ <cmdsynopsis id='pam_usertype-cmdsynopsis'>
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+ <command>pam_usertype.so</command>
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+ <arg choice='opt' rep='repeat'><replaceable>flag</replaceable></arg>
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+ <arg choice='req'><replaceable>condition</replaceable></arg>
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+ </cmdsynopsis>
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+ </refsynopsisdiv>
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+
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+
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+ <refsect1 id='pam_usertype-description'>
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+ <title>DESCRIPTION</title>
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+ <para>
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+ pam_usertype.so is designed to succeed or fail authentication
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+ based on type of the account of the authenticated user.
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+ The type of the account is decided with help of
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+ <emphasis>SYS_UID_MIN</emphasis> and <emphasis>SYS_UID_MAX</emphasis>
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+ settings in <emphasis>/etc/login.defs</emphasis>. One use is to select
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+ whether to load other modules based on this test.
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+ </para>
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+
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+ <para>
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+ The module should be given only one condition as module argument.
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+ Authentication will succeed only if the condition is met.
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+ </para>
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+ </refsect1>
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+
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+ <refsect1 id="pam_usertype-options">
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+ <title>OPTIONS</title>
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+ <para>
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+ The following <emphasis>flag</emphasis>s are supported:
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+ </para>
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+
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+ <variablelist>
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+ <varlistentry>
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+ <term><option>use_uid</option></term>
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+ <listitem>
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+ <para>
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+ Evaluate conditions using the account of the user whose UID
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+ the application is running under instead of the user being
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+ authenticated.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+ <varlistentry>
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+ <term><option>audit</option></term>
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+ <listitem>
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+ <para>
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+ Log unknown users to the system log.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+ </variablelist>
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+
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+ <para>
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+ Available <emphasis>condition</emphasis>s are:
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+ </para>
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+
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+ <variablelist>
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+ <varlistentry>
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+ <term><option>issystem</option></term>
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+ <listitem>
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+ <para>Succeed if the user is a system user.</para>
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+ </listitem>
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+ </varlistentry>
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+ <varlistentry>
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+ <term><option>isregular</option></term>
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+ <listitem>
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+ <para>Succeed if the user is a regular user.</para>
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+ </listitem>
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+ </varlistentry>
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+ </variablelist>
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+ </refsect1>
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+
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+ <refsect1 id="pam_usertype-types">
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+ <title>MODULE TYPES PROVIDED</title>
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+ <para>
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+ All module types (<option>account</option>, <option>auth</option>,
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+ <option>password</option> and <option>session</option>) are provided.
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+ </para>
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+ </refsect1>
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+
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+ <refsect1 id='pam_usertype-return_values'>
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+ <title>RETURN VALUES</title>
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+ <variablelist>
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+
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+ <varlistentry>
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+ <term>PAM_SUCCESS</term>
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+ <listitem>
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+ <para>
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+ The condition was true.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+
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+ <varlistentry>
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+ <term>PAM_AUTH_ERR</term>
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+ <listitem>
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+ <para>
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+ The condition was false.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+
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+ <varlistentry>
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+ <term>PAM_SERVICE_ERR</term>
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+ <listitem>
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+ <para>
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+ A service error occurred or the arguments can't be
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+ parsed correctly.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+
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+ <varlistentry>
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+ <term>PAM_USER_UNKNOWN</term>
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+ <listitem>
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+ <para>
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+ User was not found.
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+ </para>
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+ </listitem>
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+ </varlistentry>
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+ </variablelist>
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+ </refsect1>
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+
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+
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+ <refsect1 id='pam_usertype-examples'>
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+ <title>EXAMPLES</title>
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+ <para>
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+ Skip remaining modules if the user is a system user:
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+ </para>
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+ <programlisting>
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+account sufficient pam_usertype.so issystem
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+ </programlisting>
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+ </refsect1>
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+
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+ <refsect1 id='pam_usertype-see_also'>
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+ <title>SEE ALSO</title>
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+ <para>
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+ <citerefentry>
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+ <refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum>
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+ </citerefentry>,
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+ <citerefentry>
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+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
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+ </citerefentry>
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+ </para>
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+ </refsect1>
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+
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+ <refsect1 id='pam_usertype-author'>
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+ <title>AUTHOR</title>
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+ <para>Pavel Březina <pbrezina@redhat.com></para>
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+ </refsect1>
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+</refentry>
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diff -up Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.c.pam-usertype Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.c
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--- Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.c.pam-usertype 2020-05-15 10:03:27.270468089 +0200
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+++ Linux-PAM-1.3.1/modules/pam_usertype/pam_usertype.c 2020-05-15 10:16:08.053198025 +0200
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@@ -0,0 +1,394 @@
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+/******************************************************************************
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+ * Check user type based on login.defs.
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+ *
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+ * Copyright (c) 2020 Red Hat, Inc.
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+ * Written by Pavel Březina <pbrezina@redhat.com>
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ * 1. Redistributions of source code must retain the above copyright
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+ * notice, and the entire permission notice in its entirety,
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+ * including the disclaimer of warranties.
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+ * 2. Redistributions in binary form must reproduce the above copyright
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+ * notice, this list of conditions and the following disclaimer in the
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+ * documentation and/or other materials provided with the distribution.
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+ * 3. The name of the author may not be used to endorse or promote
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+ * products derived from this software without specific prior
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+ * written permission.
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+ *
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+ * ALTERNATIVELY, this product may be distributed under the terms of
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+ * the GNU Public License, in which case the provisions of the GPL are
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+ * required INSTEAD OF the above restrictions. (This clause is
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+ * necessary due to a potential bad interaction between the GPL and
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+ * the restrictions contained in a BSD-style copyright.)
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+ *
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+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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+ * OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ */
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+
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+#include "config.h"
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+
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+#include <sys/types.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <syslog.h>
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+#include <unistd.h>
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+#include <pwd.h>
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+#include <ctype.h>
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+#include <errno.h>
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+#include <stdio.h>
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+
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+#define PAM_SM_AUTH
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+#define PAM_SM_ACCOUNT
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+#define PAM_SM_SESSION
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+#define PAM_SM_PASSWORD
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+
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+#include <security/pam_modules.h>
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+#include <security/pam_modutil.h>
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+#include <security/pam_ext.h>
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+
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+#define LOGIN_DEFS "/etc/login.defs"
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+
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+enum pam_usertype_op {
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+ OP_IS_SYSTEM,
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+ OP_IS_REGULAR,
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+
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+ OP_SENTINEL
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+};
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+
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+struct pam_usertype_opts {
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+ enum pam_usertype_op op;
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+ int use_uid;
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+ int audit;
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+};
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+
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+static int
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+pam_usertype_parse_args(struct pam_usertype_opts *opts,
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+ pam_handle_t *pamh,
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+ int argc,
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+ const char **argv)
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+{
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+ int i;
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+
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+ memset(opts, 0, sizeof(struct pam_usertype_opts));
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+ opts->op = OP_SENTINEL;
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+
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+ for (i = 0; i < argc; i++) {
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+ if (strcmp(argv[i], "use_uid") == 0) {
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+ opts->use_uid = 1;
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+ } else if (strcmp(argv[i], "audit") == 0) {
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+ opts->audit = 1;
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+ } else if (strcmp(argv[i], "issystem") == 0) {
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+ opts->op = OP_IS_SYSTEM;
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+ } else if (strcmp(argv[i], "isregular") == 0) {
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+ opts->op = OP_IS_REGULAR;
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+ } else {
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+ pam_syslog(pamh, LOG_WARNING, "Unknown argument: %s", argv[i]);
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+ /* Just continue. */
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+ }
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+ }
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+
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||
|
+ if (opts->op == OP_SENTINEL) {
|
||
|
+ pam_syslog(pamh, LOG_ERR, "Operation not specified");
|
||
|
+ return PAM_SERVICE_ERR;
|
||
|
+ }
|
||
|
+
|
||
|
+ return PAM_SUCCESS;
|
||
|
+}
|
||
|
+
|
||
|
+static int
|
||
|
+pam_usertype_get_uid(struct pam_usertype_opts *opts,
|
||
|
+ pam_handle_t *pamh,
|
||
|
+ uid_t *_uid)
|
||
|
+{
|
||
|
+ struct passwd *pwd;
|
||
|
+ const void *prompt;
|
||
|
+ const char *username;
|
||
|
+ int ret;
|
||
|
+
|
||
|
+ /* Get uid of user that runs the application. */
|
||
|
+ if (opts->use_uid) {
|
||
|
+ pwd = pam_modutil_getpwuid(pamh, getuid());
|
||
|
+ if (pwd == NULL) {
|
||
|
+ pam_syslog(pamh, LOG_ERR,
|
||
|
+ "error retrieving information about user %lu",
|
||
|
+ (unsigned long)getuid());
|
||
|
+ return PAM_USER_UNKNOWN;
|
||
|
+ }
|
||
|
+
|
||
|
+ *_uid = pwd->pw_uid;
|
||
|
+ return PAM_SUCCESS;
|
||
|
+ }
|
||
|
+
|
||
|
+ /* Get uid of user that is being authenticated. */
|
||
|
+ ret = pam_get_item(pamh, PAM_USER_PROMPT, &prompt);
|
||
|
+ if (ret != PAM_SUCCESS || prompt == NULL || strlen(prompt) == 0) {
|
||
|
+ prompt = "login: ";
|
||
|
+ }
|
||
|
+
|
||
|
+ ret = pam_get_user(pamh, &username, prompt);
|
||
|
+ if (ret != PAM_SUCCESS || username == NULL) {
|
||
|
+ pam_syslog(pamh, LOG_ERR, "error retrieving user name: %s",
|
||
|
+ pam_strerror(pamh, ret));
|
||
|
+ return ret;
|
||
|
+ }
|
||
|
+
|
||
|
+ pwd = pam_modutil_getpwnam(pamh, username);
|
||
|
+ if (pwd == NULL) {
|
||
|
+ if (opts->audit) {
|
||
|
+ pam_syslog(pamh, LOG_NOTICE,
|
||
|
+ "error retrieving information about user %s", username);
|
||
|
+ }
|
||
|
+
|
||
|
+ return PAM_USER_UNKNOWN;
|
||
|
+ }
|
||
|
+
|
||
|
+ *_uid = pwd->pw_uid;
|
||
|
+
|
||
|
+ return PAM_SUCCESS;
|
||
|
+}
|
||
|
+
|
||
|
+#define MAX_UID_VALUE 0xFFFFFFFFUL
|
||
|
+
|
||
|
+/* lookup a value for key in login.defs file or similar key value format */
|
||
|
+char *
|
||
|
+pam_usertype_search_key(pam_handle_t *pamh UNUSED,
|
||
|
+ const char *file_name,
|
||
|
+ const char *key)
|
||
|
+{
|
||
|
+ FILE *fp;
|
||
|
+ char *buf = NULL;
|
||
|
+ size_t buflen = 0;
|
||
|
+ char *retval = NULL;
|
||
|
+
|
||
|
+ fp = fopen(file_name, "r");
|
||
|
+ if (NULL == fp)
|
||
|
+ return NULL;
|
||
|
+
|
||
|
+ while (!feof(fp)) {
|
||
|
+ char *tmp, *cp;
|
||
|
+#if defined(HAVE_GETLINE)
|
||
|
+ ssize_t n = getline(&buf, &buflen, fp);
|
||
|
+#elif defined (HAVE_GETDELIM)
|
||
|
+ ssize_t n = getdelim(&buf, &buflen, '\n', fp);
|
||
|
+#else
|
||
|
+ ssize_t n;
|
||
|
+
|
||
|
+ if (buf == NULL) {
|
||
|
+ buflen = BUF_SIZE;
|
||
|
+ buf = malloc(buflen);
|
||
|
+ if (buf == NULL) {
|
||
|
+ fclose(fp);
|
||
|
+ return NULL;
|
||
|
+ }
|
||
|
+ }
|
||
|
+ buf[0] = '\0';
|
||
|
+ if (fgets(buf, buflen - 1, fp) == NULL)
|
||
|
+ break;
|
||
|
+ else if (buf != NULL)
|
||
|
+ n = strlen(buf);
|
||
|
+ else
|
||
|
+ n = 0;
|
||
|
+#endif /* HAVE_GETLINE / HAVE_GETDELIM */
|
||
|
+ cp = buf;
|
||
|
+
|
||
|
+ if (n < 1)
|
||
|
+ break;
|
||
|
+ if (cp[n - 1] == '\n')
|
||
|
+ cp[n - 1] = '\0';
|
||
|
+
|
||
|
+ tmp = strchr(cp, '#'); /* remove comments */
|
||
|
+ if (tmp)
|
||
|
+ *tmp = '\0';
|
||
|
+ while (isspace((int)*cp)) /* remove spaces and tabs */
|
||
|
+ ++cp;
|
||
|
+ if (*cp == '\0') /* ignore empty lines */
|
||
|
+ continue;
|
||
|
+
|
||
|
+ tmp = strsep (&cp, " \t=");
|
||
|
+ if (cp != NULL)
|
||
|
+ while (isspace((int)*cp) || *cp == '=')
|
||
|
+ ++cp;
|
||
|
+ else
|
||
|
+ cp = "";
|
||
|
+
|
||
|
+ if (strcasecmp(tmp, key) == 0) {
|
||
|
+ retval = strdup(cp);
|
||
|
+ break;
|
||
|
+ }
|
||
|
+ }
|
||
|
+ fclose(fp);
|
||
|
+
|
||
|
+ free(buf);
|
||
|
+
|
||
|
+ return retval;
|
||
|
+}
|
||
|
+
|
||
|
+static uid_t
|
||
|
+pam_usertype_get_id(pam_handle_t *pamh,
|
||
|
+ const char *key,
|
||
|
+ uid_t default_value)
|
||
|
+{
|
||
|
+ unsigned long ul;
|
||
|
+ char *value;
|
||
|
+ char *ep;
|
||
|
+ uid_t uid;
|
||
|
+
|
||
|
+ value = pam_usertype_search_key(pamh, LOGIN_DEFS, key);
|
||
|
+ if (value == NULL) {
|
||
|
+ return default_value;
|
||
|
+ }
|
||
|
+
|
||
|
+ /* taken from get_lastlog_uid_max() */
|
||
|
+ ep = value + strlen(value);
|
||
|
+ while (ep > value && isspace(*(--ep))) {
|
||
|
+ *ep = '\0';
|
||
|
+ }
|
||
|
+
|
||
|
+ errno = 0;
|
||
|
+ ul = strtoul(value, &ep, 10);
|
||
|
+ if (!(ul >= MAX_UID_VALUE
|
||
|
+ || (uid_t)ul >= MAX_UID_VALUE
|
||
|
+ || (errno != 0 && ul == 0)
|
||
|
+ || value == ep
|
||
|
+ || *ep != '\0')) {
|
||
|
+ uid = (uid_t)ul;
|
||
|
+ } else {
|
||
|
+ uid = default_value;
|
||
|
+ }
|
||
|
+
|
||
|
+ free(value);
|
||
|
+
|
||
|
+ return uid;
|
||
|
+}
|
||
|
+
|
||
|
+static int
|
||
|
+pam_usertype_is_system(pam_handle_t *pamh, uid_t uid)
|
||
|
+{
|
||
|
+ uid_t uid_min;
|
||
|
+ uid_t sys_min;
|
||
|
+ uid_t sys_max;
|
||
|
+
|
||
|
+ if (uid == (uid_t)-1) {
|
||
|
+ pam_syslog(pamh, LOG_WARNING, "invalid uid");
|
||
|
+ return PAM_USER_UNKNOWN;
|
||
|
+ }
|
||
|
+
|
||
|
+ if (uid <= 99) {
|
||
|
+ /* Reserved. */
|
||
|
+ return PAM_SUCCESS;
|
||
|
+ }
|
||
|
+
|
||
|
+ if (uid == PAM_USERTYPE_OVERFLOW_UID) {
|
||
|
+ /* nobody */
|
||
|
+ return PAM_SUCCESS;
|
||
|
+ }
|
||
|
+
|
||
|
+ uid_min = pam_usertype_get_id(pamh, "UID_MIN", PAM_USERTYPE_UIDMIN);
|
||
|
+ sys_min = pam_usertype_get_id(pamh, "SYS_UID_MIN", PAM_USERTYPE_SYSUIDMIN);
|
||
|
+ sys_max = pam_usertype_get_id(pamh, "SYS_UID_MAX", uid_min - 1);
|
||
|
+
|
||
|
+ return uid >= sys_min && uid <= sys_max ? PAM_SUCCESS : PAM_AUTH_ERR;
|
||
|
+}
|
||
|
+
|
||
|
+static int
|
||
|
+pam_usertype_is_regular(pam_handle_t *pamh, uid_t uid)
|
||
|
+{
|
||
|
+ int ret;
|
||
|
+
|
||
|
+ ret = pam_usertype_is_system(pamh, uid);
|
||
|
+ switch (ret) {
|
||
|
+ case PAM_SUCCESS:
|
||
|
+ return PAM_AUTH_ERR;
|
||
|
+ case PAM_USER_UNKNOWN:
|
||
|
+ return PAM_USER_UNKNOWN;
|
||
|
+ default:
|
||
|
+ return PAM_SUCCESS;
|
||
|
+ }
|
||
|
+}
|
||
|
+
|
||
|
+static int
|
||
|
+pam_usertype_evaluate(struct pam_usertype_opts *opts,
|
||
|
+ pam_handle_t *pamh,
|
||
|
+ uid_t uid)
|
||
|
+{
|
||
|
+ switch (opts->op) {
|
||
|
+ case OP_IS_SYSTEM:
|
||
|
+ return pam_usertype_is_system(pamh, uid);
|
||
|
+ case OP_IS_REGULAR:
|
||
|
+ return pam_usertype_is_regular(pamh, uid);
|
||
|
+ default:
|
||
|
+ pam_syslog(pamh, LOG_ERR, "Unknown operation: %d", opts->op);
|
||
|
+ return PAM_SERVICE_ERR;
|
||
|
+ }
|
||
|
+}
|
||
|
+
|
||
|
+/**
|
||
|
+ * Arguments:
|
||
|
+ * - issystem: uid in <SYS_UID_MIN, SYS_UID_MAX>
|
||
|
+ * - isregular: not issystem
|
||
|
+ * - use_uid: use user that runs application not that is being authenticate (same as in pam_succeed_if)
|
||
|
+ * - audit: log unknown users to syslog
|
||
|
+ */
|
||
|
+int
|
||
|
+pam_sm_authenticate(pam_handle_t *pamh, int flags UNUSED,
|
||
|
+ int argc, const char **argv)
|
||
|
+{
|
||
|
+ struct pam_usertype_opts opts;
|
||
|
+ uid_t uid;
|
||
|
+ int ret;
|
||
|
+
|
||
|
+ ret = pam_usertype_parse_args(&opts, pamh, argc, argv);
|
||
|
+ if (ret != PAM_SUCCESS) {
|
||
|
+ return ret;
|
||
|
+ }
|
||
|
+
|
||
|
+ ret = pam_usertype_get_uid(&opts, pamh, &uid);
|
||
|
+ if (ret != PAM_SUCCESS) {
|
||
|
+ return ret;
|
||
|
+ }
|
||
|
+
|
||
|
+ return pam_usertype_evaluate(&opts, pamh, uid);
|
||
|
+}
|
||
|
+
|
||
|
+int
|
||
|
+pam_sm_setcred(pam_handle_t *pamh UNUSED, int flags UNUSED,
|
||
|
+ int argc UNUSED, const char **argv UNUSED)
|
||
|
+{
|
||
|
+ return PAM_IGNORE;
|
||
|
+}
|
||
|
+
|
||
|
+int
|
||
|
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv)
|
||
|
+{
|
||
|
+ return pam_sm_authenticate(pamh, flags, argc, argv);
|
||
|
+}
|
||
|
+
|
||
|
+int
|
||
|
+pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
|
||
|
+{
|
||
|
+ return pam_sm_authenticate(pamh, flags, argc, argv);
|
||
|
+}
|
||
|
+
|
||
|
+int
|
||
|
+pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
|
||
|
+{
|
||
|
+ return pam_sm_authenticate(pamh, flags, argc, argv);
|
||
|
+}
|
||
|
+
|
||
|
+int
|
||
|
+pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char **argv)
|
||
|
+{
|
||
|
+ return pam_sm_authenticate(pamh, flags, argc, argv);
|
||
|
+}
|
||
|
diff -up Linux-PAM-1.3.1/modules/pam_usertype/README.xml.pam-usertype Linux-PAM-1.3.1/modules/pam_usertype/README.xml
|
||
|
--- Linux-PAM-1.3.1/modules/pam_usertype/README.xml.pam-usertype 2020-05-15 10:03:27.270468089 +0200
|
||
|
+++ Linux-PAM-1.3.1/modules/pam_usertype/README.xml 2020-05-15 10:03:27.270468089 +0200
|
||
|
@@ -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_usertype.8.xml">
|
||
|
+-->
|
||
|
+]>
|
||
|
+
|
||
|
+<article>
|
||
|
+
|
||
|
+ <articleinfo>
|
||
|
+
|
||
|
+ <title>
|
||
|
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
+ href="pam_usertype.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_usertype-name"]/*)'/>
|
||
|
+ </title>
|
||
|
+
|
||
|
+ </articleinfo>
|
||
|
+
|
||
|
+ <section>
|
||
|
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
+ href="pam_usertype.8.xml" xpointer='xpointer(//refsect1[@id = "pam_usertype-description"]/*)'/>
|
||
|
+ </section>
|
||
|
+
|
||
|
+ <section>
|
||
|
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
+ href="pam_usertype.8.xml" xpointer='xpointer(//refsect1[@id = "pam_usertype-options"]/*)'/>
|
||
|
+ </section>
|
||
|
+
|
||
|
+ <section>
|
||
|
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
+ href="pam_usertype.8.xml" xpointer='xpointer(//refsect1[@id = "pam_usertype-examples"]/*)'/>
|
||
|
+ </section>
|
||
|
+
|
||
|
+ <section>
|
||
|
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
+ href="pam_usertype.8.xml" xpointer='xpointer(//refsect1[@id = "pam_usertype-author"]/*)'/>
|
||
|
+ </section>
|
||
|
+
|
||
|
+</article>
|
||
|
diff -up Linux-PAM-1.3.1/modules/pam_usertype/tst-pam_usertype.pam-usertype Linux-PAM-1.3.1/modules/pam_usertype/tst-pam_usertype
|
||
|
--- Linux-PAM-1.3.1/modules/pam_usertype/tst-pam_usertype.pam-usertype 2020-05-15 10:03:27.270468089 +0200
|
||
|
+++ Linux-PAM-1.3.1/modules/pam_usertype/tst-pam_usertype 2020-05-15 10:03:27.270468089 +0200
|
||
|
@@ -0,0 +1,2 @@
|
||
|
+#!/bin/sh
|
||
|
+../../tests/tst-dlopen .libs/pam_usertype.so
|