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import pam-1.5.1-8.el9

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CentOS Sources 2021-11-03 23:11:36 -04:00 committed by Stepan Oksanichenko
commit d0e0242fab
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.gitignore vendored Normal file
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SOURCES/Linux-PAM-1.5.1.tar.xz
SOURCES/pam-redhat-1.1.4.tar.bz2

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.pam.metadata Normal file
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ad43b7fbdfdd38886fdf27e098b49f2db1c2a13d SOURCES/Linux-PAM-1.5.1.tar.xz
bf661c44f34c2d4d34eaee695b36e638f4d44ba8 SOURCES/pam-redhat-1.1.4.tar.bz2

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.TH SYSTEM-AUTH 5 "2006 Feb 3" "Red Hat" "Linux-PAM Manual"
.SH NAME
config-util \- Common PAM configuration file for configuration utilities
.SH SYNOPSIS
.B /etc/pam.d/config-util
.sp 2
.SH DESCRIPTION
The purpose of this configuration file is to provide common
configuration file for all configuration utilities which must be run
from the supervisor account and use the userhelper wrapper application.
.sp
The
.BR config-util
configuration file is included from all individual configuration
files of such utilities with the help of the
.BR include
directive.
There are not usually any other modules in the individual configuration
files of these utilities.
.sp
It is possible for example to modify duration of the validity of the
authentication timestamp there. See
.BR pam_timestamp(8)
for details.
.SH BUGS
.sp 2
None known.
.SH "SEE ALSO"
pam(8), config-util(5), pam_timestamp(8)

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#%PAM-1.0
auth sufficient pam_rootok.so
auth sufficient pam_timestamp.so
auth include system-auth
account required pam_permit.so
session required pam_permit.so
session optional pam_xauth.so
session optional pam_timestamp.so

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#!/bin/sh
tempdir=`mktemp -d /tmp/dlopenXXXXXX`
test -n "$tempdir" || exit 1
cat >> $tempdir/dlopen.c << _EOF
#include <dlfcn.h>
#include <stdio.h>
#include <limits.h>
#include <sys/stat.h>
/* Simple program to see if dlopen() would succeed. */
int main(int argc, char **argv)
{
int i;
struct stat st;
char buf[PATH_MAX];
for (i = 1; i < argc; i++) {
if (dlopen(argv[i], RTLD_NOW)) {
fprintf(stdout, "dlopen() of \"%s\" succeeded.\n",
argv[i]);
} else {
snprintf(buf, sizeof(buf), "./%s", argv[i]);
if ((stat(buf, &st) == 0) && dlopen(buf, RTLD_NOW)) {
fprintf(stdout, "dlopen() of \"./%s\" "
"succeeded.\n", argv[i]);
} else {
fprintf(stdout, "dlopen() of \"%s\" failed: "
"%s\n", argv[i], dlerror());
return 1;
}
}
}
return 0;
}
_EOF
for arg in $@ ; do
case "$arg" in
"")
;;
-I*|-D*|-f*|-m*|-g*|-O*|-W*)
cflags="$cflags $arg"
;;
-l*|-L*)
ldflags="$ldflags $arg"
;;
/*)
modules="$modules $arg"
;;
*)
modules="$modules $arg"
;;
esac
done
${CC:-gcc} $RPM_OPT_FLAGS $CFLAGS -o $tempdir/dlopen $cflags $tempdir/dlopen.c $ldflags -ldl
retval=0
for module in $modules ; do
case "$module" in
"")
;;
/*)
$tempdir/dlopen "$module"
retval=$?
;;
*)
$tempdir/dlopen ./"$module"
retval=$?
;;
esac
done
rm -f $tempdir/dlopen $tempdir/dlopen.c
rmdir $tempdir
exit $retval

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#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authselect is run.
auth required pam_env.so
auth sufficient pam_fprintd.so
auth required pam_deny.so
account required pam_unix.so
account sufficient pam_localuser.so
account sufficient pam_succeed_if.so uid < 500 quiet
account required pam_permit.so
password required pam_deny.so
session optional pam_keyinit.so revoke
session required pam_limits.so
-session optional pam_systemd.so
session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session required pam_unix.so

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SOURCES/gpl-2.0.txt Normal file
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#%PAM-1.0
auth required pam_deny.so
account required pam_deny.so
password required pam_deny.so
session required pam_deny.so

16
SOURCES/pam-1.3.0-unix-nomsg.patch Normal file
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diff -up Linux-PAM-1.3.0/modules/pam_unix/pam_unix_passwd.c.nomsg Linux-PAM-1.3.0/modules/pam_unix/pam_unix_passwd.c
--- Linux-PAM-1.3.0/modules/pam_unix/pam_unix_passwd.c.nomsg 2016-04-11 13:08:47.000000000 +0200
+++ Linux-PAM-1.3.0/modules/pam_unix/pam_unix_passwd.c 2017-04-20 16:51:24.853106709 +0200
@@ -687,12 +687,6 @@ pam_sm_chauthtok(pam_handle_t *pamh, int
return PAM_SUCCESS;
} else if (off(UNIX__IAMROOT, ctrl) ||
(on(UNIX_NIS, ctrl) && _unix_comesfromsource(pamh, user, 0, 1))) {
- /* instruct user what is happening */
- if (off(UNIX__QUIET, ctrl)) {
- retval = pam_info(pamh, _("Changing password for %s."), user);
- if (retval != PAM_SUCCESS)
- return retval;
- }
retval = pam_get_authtok(pamh, PAM_OLDAUTHTOK, &pass_old, NULL);
if (retval != PAM_SUCCESS) {

24
SOURCES/pam-1.5.0-noflex.patch Normal file
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@ -0,0 +1,24 @@
diff -up Linux-PAM-1.5.0/doc/Makefile.am.noflex Linux-PAM-1.5.0/doc/Makefile.am
--- Linux-PAM-1.5.0/doc/Makefile.am.noflex 2020-11-10 16:46:13.000000000 +0100
+++ Linux-PAM-1.5.0/doc/Makefile.am 2020-11-11 11:39:00.980421433 +0100
@@ -2,7 +2,7 @@
# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de>
#
-SUBDIRS = man specs sag adg mwg
+SUBDIRS = man sag adg mwg
CLEANFILES = *~
diff -up Linux-PAM-1.5.0/Makefile.am.noflex Linux-PAM-1.5.0/Makefile.am
--- Linux-PAM-1.5.0/Makefile.am.noflex 2020-11-11 11:39:00.980421433 +0100
+++ Linux-PAM-1.5.0/Makefile.am 2020-11-11 11:39:15.887625418 +0100
@@ -4,7 +4,7 @@
AUTOMAKE_OPTIONS = 1.9 gnu dist-xz no-dist-gzip check-news
-SUBDIRS = libpam tests libpamc libpam_misc modules po conf examples xtests
+SUBDIRS = libpam tests libpamc libpam_misc modules po doc examples xtests
if HAVE_DOC
SUBDIRS += doc

25
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@ -0,0 +1,25 @@
diff -up Linux-PAM-1.5.0/configure.ac.redhat-modules Linux-PAM-1.5.0/configure.ac
--- Linux-PAM-1.5.0/configure.ac.redhat-modules 2020-11-11 11:21:21.947857371 +0100
+++ Linux-PAM-1.5.0/configure.ac 2020-11-11 11:22:58.638193747 +0100
@@ -639,6 +639,8 @@ AC_CONFIG_FILES([Makefile libpam/Makefil
po/Makefile.in \
Make.xml.rules \
modules/Makefile \
+ modules/pam_chroot/Makefile modules/pam_console/Makefile \
+ modules/pam_postgresok/Makefile \
modules/pam_access/Makefile \
modules/pam_debug/Makefile modules/pam_deny/Makefile \
modules/pam_echo/Makefile modules/pam_env/Makefile \
diff -up Linux-PAM-1.5.0/modules/Makefile.am.redhat-modules Linux-PAM-1.5.0/modules/Makefile.am
--- Linux-PAM-1.5.0/modules/Makefile.am.redhat-modules 2020-11-10 16:46:13.000000000 +0100
+++ Linux-PAM-1.5.0/modules/Makefile.am 2020-11-11 11:21:21.947857371 +0100
@@ -47,6 +47,9 @@ SUBDIRS := \
pam_debug \
pam_deny \
pam_echo \
+ pam_chroot \
+ pam_console \
+ pam_postgresok \
pam_env \
pam_exec \
pam_faildelay \

42
SOURCES/pam-1.5.1-pam_filter_close_file_after_controlling_tty.patch Normal file
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@ -0,0 +1,42 @@
From ec0e724fe53188c5c762c34ca9db6681c0de01b8 Mon Sep 17 00:00:00 2001
From: Iker Pedrosa <ipedrosa@redhat.com>
Date: Thu, 1 Jul 2021 12:14:29 +0200
Subject: [PATCH] pam_filter: Close file after controlling tty
Failing to check the descriptor value meant that there was a bug in the
attempt to close the controlling tty. Moreover, this would lead to a
file descriptor leak as pointed out by the static analyzer tool:
Error: RESOURCE_LEAK (CWE-772): [#def26]
Linux-PAM-1.5.1/modules/pam_filter/pam_filter.c:356: open_fn: Returning handle opened by "open". [Note: The source code implementation of the function has been overridden by a user model.]
Linux-PAM-1.5.1/modules/pam_filter/pam_filter.c:356: var_assign: Assigning: "t" = handle returned from "open("/dev/tty", 2)".
Linux-PAM-1.5.1/modules/pam_filter/pam_filter.c:357: off_by_one: Testing whether handle "t" is strictly greater than zero is suspicious. "t" leaks when it is zero.
Linux-PAM-1.5.1/modules/pam_filter/pam_filter.c:357: remediation: Did you intend to include equality with zero?
Linux-PAM-1.5.1/modules/pam_filter/pam_filter.c:367: leaked_handle: Handle variable "t" going out of scope leaks the handle.
365| pam_syslog(pamh, LOG_ERR,
366| "child cannot become new session: %m");
367|-> return PAM_ABORT;
368| }
369|
Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>
---
modules/pam_filter/pam_filter.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/modules/pam_filter/pam_filter.c b/modules/pam_filter/pam_filter.c
index 2f0af4fb..6e6def37 100644
--- a/modules/pam_filter/pam_filter.c
+++ b/modules/pam_filter/pam_filter.c
@@ -354,7 +354,7 @@ set_filter (pam_handle_t *pamh, int flags UNUSED, int ctrl,
int t = open("/dev/tty", O_RDWR|O_NOCTTY);
#else
int t = open("/dev/tty",O_RDWR);
- if (t > 0) {
+ if (t >= 0) {
(void) ioctl(t, TIOCNOTTY, NULL);
close(t);
}
--
2.31.1

738
SOURCES/pam-1.5.1-timestamp-openssl-hmac-authentication.patch Normal file
View File

@ -0,0 +1,738 @@
From b3bb13e18a74e9ece825b7de1b81db97ebb107a0 Mon Sep 17 00:00:00 2001
From: Iker Pedrosa <ipedrosa@redhat.com>
Date: Thu, 25 Mar 2021 09:43:30 +0100
Subject: [PATCH] pam_timestamp: replace hmac implementation
sha1 is no longer recommended as a cryptographic algorithm for
authentication. Thus, the idea of this change is to replace the
implementation provided by hmacsha1 included in pam_timestamp module by
the one in the openssl library. This way, there's no need to maintain
the cryptographic algorithm implementation and it can be easily changed
with a single configuration change.
modules/pam_timestamp/hmac_openssl_wrapper.c: implement wrapper
functions around openssl's hmac implementation. Moreover, manage the key
generation and its read and write in a file. Include an option to
configure the cryptographic algorithm in login.defs file.
modules/pam_timestamp/hmac_openssl_wrapper.h: likewise.
modules/pam_timestamp/pam_timestamp.c: replace calls to functions
provided by hmacsha1 by functions provided by openssl's wrapper.
configure.ac: include openssl dependecy if it is enabled.
modules/pam_timestamp/Makefile.am: include new files and openssl library
to compilation.
ci/install-dependencies.sh: include openssl library to dependencies.
NEWS: add new item to next release.
Make.xml.rules.in: add stringparam profiling for hmac
doc/custom-man.xsl: change import docbook to one with profiling
modules/pam_timestamp/pam_timestamp.8.xml: add conditional paragraph to
indicate the value in /etc/login.defs that holds the value for the
encryption algorithm
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1947294
---
Make.xml.rules.in | 2 +-
NEWS | 5 +
configure.ac | 16 +
doc/custom-man.xsl | 2 +-
modules/pam_timestamp/Makefile.am | 15 +-
modules/pam_timestamp/hmac_openssl_wrapper.c | 381 +++++++++++++++++++
modules/pam_timestamp/hmac_openssl_wrapper.h | 57 +++
modules/pam_timestamp/pam_timestamp.8.xml | 5 +
modules/pam_timestamp/pam_timestamp.c | 53 ++-
10 files changed, 524 insertions(+), 13 deletions(-)
create mode 100644 modules/pam_timestamp/hmac_openssl_wrapper.c
create mode 100644 modules/pam_timestamp/hmac_openssl_wrapper.h
diff --git a/Make.xml.rules.in b/Make.xml.rules.in
index daa1b97b..27bb510e 100644
--- a/Make.xml.rules.in
+++ b/Make.xml.rules.in
@@ -21,6 +21,6 @@ README: README.xml
%.8: %.8.xml
$(XMLLINT) --nonet --xinclude --postvalid --noout $<
- $(XSLTPROC) -o $(srcdir)/$@ --path $(srcdir) --xinclude @STRINGPARAM_VENDORDIR@ --nonet $(top_srcdir)/doc/custom-man.xsl $<
+ $(XSLTPROC) -o $(srcdir)/$@ --path $(srcdir) --xinclude @STRINGPARAM_VENDORDIR@ @STRINGPARAM_HMAC@ --nonet $(top_srcdir)/doc/custom-man.xsl $<
#CLEANFILES += $(man_MANS) README
diff --git a/NEWS b/NEWS
index 2d49ec39..f4d11303 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,10 @@
Linux-PAM NEWS -- history of user-visible changes.
+Release next
+* pam_timestamp: change hmac algorithm to call openssl instead of the bundled
+ sha1 implementation if selected. Add option to select the hash
+ algorithm to use with HMAC.
+
Release 1.5.1
* pam_unix: fixed CVE-2020-27780 - authentication bypass when a user
doesn't exist and root password is blank
diff --git a/configure.ac b/configure.ac
index bd806473..9c92d0de 100644
--- a/configure.ac
+++ b/configure.ac
@@ -504,6 +504,22 @@ else
fi
AC_SUBST([STRINGPARAM_VENDORDIR])
+AC_ARG_ENABLE([openssl],
+ AS_HELP_STRING([--enable-openssl],[use OpenSSL crypto libraries]),
+ [OPENSSL_ENABLED=$enableval], OPENSSL_ENABLED=no)
+if test "$OPENSSL_ENABLED" = "yes" ; then
+ AC_CHECK_LIB([crypto], [EVP_MAC_CTX_new],
+ [CRYPTO_LIBS="-lcrypto"
+ use_openssl=yes
+ AC_DEFINE([WITH_OPENSSL], 1, [OpenSSL provides crypto algorithm for hmac])
+ STRINGPARAM_HMAC="--stringparam profile.condition 'openssl_hmac'"],
+ [CRYPTO_LIBS=""
+ STRINGPARAM_HMAC="--stringparam profile.condition 'no_openssl_hmac'"])
+fi
+AC_SUBST([CRYPTO_LIBS])
+AC_SUBST([STRINGPARAM_HMAC])
+AM_CONDITIONAL([COND_USE_OPENSSL], [test "x$use_openssl" = "xyes"])
+
dnl Checks for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
diff --git a/doc/custom-man.xsl b/doc/custom-man.xsl
index 4c35e839..a3408e6c 100644
--- a/doc/custom-man.xsl
+++ b/doc/custom-man.xsl
@@ -1,6 +1,6 @@
<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ss="http://docbook.sf.net/xmlns/string.subst/1.0" version="1.0">
- <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl"/>
+ <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/manpages/profile-docbook.xsl"/>
<xsl:param name="vendordir"/>
<xsl:param name="man.string.subst.map.local.pre">
diff --git a/modules/pam_timestamp/Makefile.am b/modules/pam_timestamp/Makefile.am
index 1faa324a..d290b85f 100644
--- a/modules/pam_timestamp/Makefile.am
+++ b/modules/pam_timestamp/Makefile.am
@@ -18,12 +18,12 @@ TESTS = $(dist_check_SCRIPTS) $(check_PROGRAMS)
securelibdir = $(SECUREDIR)
secureconfdir = $(SCONFIGDIR)
-noinst_HEADERS = hmacsha1.h sha1.h
+noinst_HEADERS = hmacsha1.h sha1.h hmac_openssl_wrapper.h
AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
$(WARN_CFLAGS)
-pam_timestamp_la_LDFLAGS = -no-undefined -avoid-version -module $(AM_LDFLAGS)
+pam_timestamp_la_LDFLAGS = -no-undefined -avoid-version -module $(AM_LDFLAGS) $(CRYPTO_LIBS)
pam_timestamp_la_LIBADD = $(top_builddir)/libpam/libpam.la
if HAVE_VERSIONING
pam_timestamp_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
@@ -32,7 +32,12 @@ endif
securelib_LTLIBRARIES = pam_timestamp.la
sbin_PROGRAMS = pam_timestamp_check
-pam_timestamp_la_SOURCES = pam_timestamp.c hmacsha1.c sha1.c
+pam_timestamp_la_SOURCES = pam_timestamp.c
+if COND_USE_OPENSSL
+pam_timestamp_la_SOURCES += hmac_openssl_wrapper.c
+else
+pam_timestamp_la_SOURCES += hmacsha1.c sha1.c
+endif
pam_timestamp_la_CFLAGS = $(AM_CFLAGS)
pam_timestamp_check_SOURCES = pam_timestamp_check.c
@@ -40,7 +45,11 @@ pam_timestamp_check_CFLAGS = $(AM_CFLAGS) @EXE_CFLAGS@
pam_timestamp_check_LDADD = $(top_builddir)/libpam/libpam.la
pam_timestamp_check_LDFLAGS = @EXE_LDFLAGS@
+if COND_USE_OPENSSL
+hmacfile_SOURCES = hmac_openssl_wrapper.c
+else
hmacfile_SOURCES = hmacfile.c hmacsha1.c sha1.c
+endif
hmacfile_LDADD = $(top_builddir)/libpam/libpam.la
check_PROGRAMS = hmacfile
diff --git a/modules/pam_timestamp/hmac_openssl_wrapper.c b/modules/pam_timestamp/hmac_openssl_wrapper.c
new file mode 100644
index 00000000..926c2fb9
--- /dev/null
+++ b/modules/pam_timestamp/hmac_openssl_wrapper.c
@@ -0,0 +1,381 @@
+/* Wrapper for hmac openssl implementation.
+ *
+ * Copyright (c) 2021 Red Hat, Inc.
+ * Written by Iker Pedrosa <ipedrosa@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"
+
+#ifdef WITH_OPENSSL
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <openssl/evp.h>
+#include <openssl/params.h>
+#include <openssl/core_names.h>
+
+#include <security/pam_ext.h>
+#include <security/pam_modutil.h>
+
+#include "hmac_openssl_wrapper.h"
+
+#define LOGIN_DEFS "/etc/login.defs"
+#define CRYPTO_KEY "HMAC_CRYPTO_ALGO"
+#define DEFAULT_ALGORITHM "SHA512"
+#define MAX_HMAC_LENGTH 512
+#define MAX_KEY_LENGTH EVP_MAX_KEY_LENGTH
+
+static char *
+get_crypto_algorithm(pam_handle_t *pamh, int debug){
+ char *config_value = NULL;
+
+ config_value = pam_modutil_search_key(pamh, LOGIN_DEFS, CRYPTO_KEY);
+
+ if (config_value == NULL) {
+ config_value = strdup(DEFAULT_ALGORITHM);
+ if (debug) {
+ pam_syslog(pamh, LOG_DEBUG,
+ "Key [%s] not found, falling back to default algorithm [%s]\n",
+ CRYPTO_KEY, DEFAULT_ALGORITHM);
+ }
+ }
+
+ return config_value;
+}
+
+static int
+generate_key(pam_handle_t *pamh, char **key, size_t key_size)
+{
+ int fd = 0;
+ size_t bytes_read = 0;
+ char * tmp = NULL;
+
+ fd = open("/dev/urandom", O_RDONLY);
+ if (fd == -1) {
+ pam_syslog(pamh, LOG_ERR, "Cannot open /dev/urandom: %m");
+ return PAM_AUTH_ERR;
+ }
+
+ tmp = malloc(key_size);
+ if (!tmp) {
+ pam_syslog(pamh, LOG_CRIT, "Not enough memory");
+ close(fd);
+ return PAM_AUTH_ERR;
+ }
+
+ bytes_read = pam_modutil_read(fd, tmp, key_size);
+ close(fd);
+
+ if (bytes_read < key_size) {
+ pam_syslog(pamh, LOG_ERR, "Short read on random device");
+ free(tmp);
+ return PAM_AUTH_ERR;
+ }
+
+ *key = tmp;
+
+ return PAM_SUCCESS;
+}
+
+static int
+read_file(pam_handle_t *pamh, int fd, char **text, size_t *text_length)
+{
+ struct stat st;
+ size_t bytes_read = 0;
+ char *tmp = NULL;
+
+ if (fstat(fd, &st) == -1) {
+ pam_syslog(pamh, LOG_ERR, "Unable to stat file: %m");
+ close(fd);
+ return PAM_AUTH_ERR;
+ }
+
+ if (st.st_size == 0) {
+ pam_syslog(pamh, LOG_ERR, "Key file size cannot be 0");
+ close(fd);
+ return PAM_AUTH_ERR;
+ }
+
+ tmp = malloc(st.st_size);
+ if (!tmp) {
+ pam_syslog(pamh, LOG_CRIT, "Not enough memory");
+ close(fd);
+ return PAM_AUTH_ERR;
+ }
+
+ bytes_read = pam_modutil_read(fd, tmp, st.st_size);
+ close(fd);
+
+ if (bytes_read < (size_t)st.st_size) {
+ pam_syslog(pamh, LOG_ERR, "Short read on key file");
+ memset(tmp, 0, st.st_size);
+ free(tmp);
+ return PAM_AUTH_ERR;
+ }
+
+ *text = tmp;
+ *text_length = st.st_size;
+
+ return PAM_SUCCESS;
+}
+
+static int
+write_file(pam_handle_t *pamh, const char *file_name, char *text,
+ size_t text_length, uid_t owner, gid_t group)
+{
+ int fd = 0;
+ size_t bytes_written = 0;
+
+ fd = open(file_name,
+ O_WRONLY | O_CREAT | O_TRUNC,
+ S_IRUSR | S_IWUSR);
+ if (fd == -1) {
+ pam_syslog(pamh, LOG_ERR, "Unable to open [%s]: %m", file_name);
+ memset(text, 0, text_length);
+ free(text);
+ return PAM_AUTH_ERR;
+ }
+
+ if (fchown(fd, owner, group) == -1) {
+ pam_syslog(pamh, LOG_ERR, "Unable to change ownership [%s]: %m", file_name);
+ memset(text, 0, text_length);
+ free(text);
+ close(fd);
+ return PAM_AUTH_ERR;
+ }
+
+ bytes_written = pam_modutil_write(fd, text, text_length);
+ close(fd);
+
+ if (bytes_written < text_length) {
+ pam_syslog(pamh, LOG_ERR, "Short write on %s", file_name);
+ free(text);
+ return PAM_AUTH_ERR;
+ }
+
+ return PAM_SUCCESS;
+}
+
+static int
+key_management(pam_handle_t *pamh, const char *file_name, char **text,
+ size_t text_length, uid_t owner, gid_t group)
+{
+ int fd = 0;
+
+ fd = open(file_name, O_RDONLY | O_NOFOLLOW);
+ if (fd == -1) {
+ if (errno == ENOENT) {
+ if (generate_key(pamh, text, text_length)) {
+ pam_syslog(pamh, LOG_ERR, "Unable to generate key");
+ return PAM_AUTH_ERR;
+ }
+
+ if (write_file(pamh, file_name, *text, text_length, owner, group)) {
+ pam_syslog(pamh, LOG_ERR, "Unable to write key");
+ return PAM_AUTH_ERR;
+ }
+ } else {
+ pam_syslog(pamh, LOG_ERR, "Unable to open %s: %m", file_name);
+ return PAM_AUTH_ERR;
+ }
+ } else {
+ if (read_file(pamh, fd, text, &text_length)) {
+ pam_syslog(pamh, LOG_ERR, "Error reading key file %s\n", file_name);
+ return PAM_AUTH_ERR;
+ }
+ }
+
+ return PAM_SUCCESS;
+}
+
+static int
+hmac_management(pam_handle_t *pamh, int debug, void **out, size_t *out_length,
+ char *key, size_t key_length,
+ const void *text, size_t text_length)
+{
+ int ret = PAM_AUTH_ERR;
+ EVP_MAC *evp_mac = NULL;
+ EVP_MAC_CTX *ctx = NULL;
+ unsigned char *hmac_message = NULL;
+ size_t hmac_length;
+ char *algo = NULL;
+ OSSL_PARAM subalg_param[] = { OSSL_PARAM_END, OSSL_PARAM_END };
+
+ algo = get_crypto_algorithm(pamh, debug);
+
+ subalg_param[0] = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST,
+ algo,
+ 0);
+
+ evp_mac = EVP_MAC_fetch(NULL, "HMAC", NULL);
+ if (evp_mac == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to create hmac implementation");
+ goto done;
+ }
+
+ ctx = EVP_MAC_CTX_new(evp_mac);
+ if (ctx == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to create hmac context");
+ goto done;
+ }
+
+ ret = EVP_MAC_init(ctx, (const unsigned char *)key, key_length, subalg_param);
+ if (ret == 0) {
+ pam_syslog(pamh, LOG_ERR, "Unable to initialize hmac context");
+ goto done;
+ }
+
+ ret = EVP_MAC_update(ctx, (const unsigned char *)text, text_length);
+ if (ret == 0) {
+ pam_syslog(pamh, LOG_ERR, "Unable to update hmac context");
+ goto done;
+ }
+
+ hmac_message = (unsigned char*)malloc(sizeof(unsigned char) * MAX_HMAC_LENGTH);
+ if (!hmac_message) {
+ pam_syslog(pamh, LOG_CRIT, "Not enough memory");
+ goto done;
+ }
+
+ ret = EVP_MAC_final(ctx, hmac_message, &hmac_length, MAX_HMAC_LENGTH);
+ if (ret == 0) {
+ pam_syslog(pamh, LOG_ERR, "Unable to calculate hmac message");
+ goto done;
+ }
+
+ *out_length = hmac_length;
+ *out = malloc(*out_length);
+ if (*out == NULL) {
+ pam_syslog(pamh, LOG_CRIT, "Not enough memory");
+ goto done;
+ }
+
+ memcpy(*out, hmac_message, *out_length);
+ ret = PAM_SUCCESS;
+
+done:
+ if (hmac_message != NULL) {
+ free(hmac_message);
+ }
+ if (key != NULL) {
+ memset(key, 0, key_length);
+ free(key);
+ }
+ if (ctx != NULL) {
+ EVP_MAC_CTX_free(ctx);
+ }
+ if (evp_mac != NULL) {
+ EVP_MAC_free(evp_mac);
+ }
+ free(algo);
+
+ return ret;
+}
+
+int
+hmac_size(pam_handle_t *pamh, int debug, size_t *hmac_length)
+{
+ int ret = PAM_AUTH_ERR;
+ EVP_MAC *evp_mac = NULL;
+ EVP_MAC_CTX *ctx = NULL;
+ const unsigned char key[] = "ThisIsJustAKey";
+ size_t key_length = MAX_KEY_LENGTH;
+ char *algo = NULL;
+ OSSL_PARAM subalg_param[] = { OSSL_PARAM_END, OSSL_PARAM_END };
+
+ algo = get_crypto_algorithm(pamh, debug);
+
+ subalg_param[0] = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST,
+ algo,
+ 0);
+
+ evp_mac = EVP_MAC_fetch(NULL, "HMAC", NULL);
+ if (evp_mac == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to create hmac implementation");
+ goto done;
+ }
+
+ ctx = EVP_MAC_CTX_new(evp_mac);
+ if (ctx == NULL) {
+ pam_syslog(pamh, LOG_ERR, "Unable to create hmac context");
+ goto done;
+ }
+
+ ret = EVP_MAC_init(ctx, key, key_length, subalg_param);
+ if (ret == 0) {
+ pam_syslog(pamh, LOG_ERR, "Unable to initialize hmac context");
+ goto done;
+ }
+
+ *hmac_length = EVP_MAC_CTX_get_mac_size(ctx);
+ ret = PAM_SUCCESS;
+
+done:
+ if (ctx != NULL) {
+ EVP_MAC_CTX_free(ctx);
+ }
+ if (evp_mac != NULL) {
+ EVP_MAC_free(evp_mac);
+ }
+ free(algo);
+
+ return ret;
+}
+
+int
+hmac_generate(pam_handle_t *pamh, int debug, void **mac, size_t *mac_length,
+ const char *key_file, uid_t owner, gid_t group,
+ const void *text, size_t text_length)
+{
+ char *key = NULL;
+ size_t key_length = MAX_KEY_LENGTH;
+
+ if (key_management(pamh, key_file, &key, key_length, owner, group)) {
+ return PAM_AUTH_ERR;
+ }
+
+ if (hmac_management(pamh, debug, mac, mac_length, key, key_length,
+ text, text_length)) {
+ return PAM_AUTH_ERR;
+ }
+
+ return PAM_SUCCESS;
+}
+
+#endif /* WITH_OPENSSL */
diff --git a/modules/pam_timestamp/hmac_openssl_wrapper.h b/modules/pam_timestamp/hmac_openssl_wrapper.h
new file mode 100644
index 00000000..cc27c811
--- /dev/null
+++ b/modules/pam_timestamp/hmac_openssl_wrapper.h
@@ -0,0 +1,57 @@
+/* Wrapper for hmac openssl implementation.
+ *
+ * Copyright (c) 2021 Red Hat, Inc.
+ * Written by Iker Pedrosa <ipedrosa@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.
+ *
+ */
+#ifndef PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H
+#define PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H
+
+#include "config.h"
+
+#ifdef WITH_OPENSSL
+
+#include <openssl/hmac.h>
+#include <security/pam_modules.h>
+
+int
+hmac_size(pam_handle_t *pamh, int debug, size_t *hmac_length);
+
+int
+hmac_generate(pam_handle_t *pamh, int debug, void **mac, size_t *mac_length,
+ const char *key_file, uid_t owner, gid_t group,
+ const void *text, size_t text_length);
+
+#endif /* WITH_OPENSSL */
+#endif /* PAM_TIMESTAMP_HMAC_OPENSSL_WRAPPER_H */
diff --git a/modules/pam_timestamp/pam_timestamp.8.xml b/modules/pam_timestamp/pam_timestamp.8.xml
index e19a0bcf..83e5aea8 100644
--- a/modules/pam_timestamp/pam_timestamp.8.xml
+++ b/modules/pam_timestamp/pam_timestamp.8.xml
@@ -50,6 +50,11 @@ for the user. When an application attempts to authenticate the user, a
<emphasis>pam_timestamp</emphasis> will treat a sufficiently recent timestamp
file as grounds for succeeding.
</para>
+ <para condition="openssl_hmac">
+ The default encryption hash is taken from the
+ <emphasis remap='B'>HMAC_CRYPTO_ALGO</emphasis> variable from
+ <emphasis>/etc/login.defs</emphasis>.
+ </para>
</refsect1>
<refsect1 id="pam_timestamp-options">
diff --git a/modules/pam_timestamp/pam_timestamp.c b/modules/pam_timestamp/pam_timestamp.c
index 30be883c..01dd1385 100644
--- a/modules/pam_timestamp/pam_timestamp.c
+++ b/modules/pam_timestamp/pam_timestamp.c
@@ -56,7 +56,11 @@
#include <utmp.h>
#include <syslog.h>
#include <paths.h>
+#ifdef WITH_OPENSSL
+#include "hmac_openssl_wrapper.h"
+#else
#include "hmacsha1.h"
+#endif /* WITH_OPENSSL */
#include <security/pam_modules.h>
#include <security/_pam_macros.h>
@@ -79,6 +83,9 @@
#define BUFLEN PATH_MAX
#endif
+#define ROOT_USER 0
+#define ROOT_GROUP 0
+
/* Return PAM_SUCCESS if the given directory looks "safe". */
static int
check_dir_perms(pam_handle_t *pamh, const char *tdir)
@@ -449,6 +456,13 @@ pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
return PAM_AUTH_ERR;
}
+#ifdef WITH_OPENSSL
+ if (hmac_size(pamh, debug, &maclen)) {
+ return PAM_AUTH_ERR;
+ }
+#else
+ maclen = hmac_sha1_size();
+#endif /* WITH_OPENSSL */
/* Check that the file is the expected size. */
if (st.st_size == 0) {
/* Invalid, but may have been created by sudo. */
@@ -456,7 +470,7 @@ pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
return PAM_AUTH_ERR;
}
if (st.st_size !=
- (off_t)(strlen(path) + 1 + sizeof(then) + hmac_sha1_size())) {
+ (off_t)(strlen(path) + 1 + sizeof(then) + maclen)) {
pam_syslog(pamh, LOG_NOTICE, "timestamp file `%s' "
"appears to be corrupted", path);
close(fd);
@@ -487,8 +501,17 @@ pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
message_end = message + strlen(path) + 1 + sizeof(then);
/* Regenerate the MAC. */
- hmac_sha1_generate_file(pamh, &mac, &maclen, TIMESTAMPKEY, 0, 0,
- message, message_end - message);
+#ifdef WITH_OPENSSL
+ if (hmac_generate(pamh, debug, &mac, &maclen, TIMESTAMPKEY,
+ ROOT_USER, ROOT_GROUP, message, message_end - message)) {
+ close(fd);
+ free(message);
+ return PAM_AUTH_ERR;
+ }
+#else
+ hmac_sha1_generate_file(pamh, &mac, &maclen, TIMESTAMPKEY,
+ ROOT_USER, ROOT_GROUP, message, message_end - message);
+#endif /* WITH_OPENSSL */
if ((mac == NULL) ||
(memcmp(path, message, strlen(path)) != 0) ||
(memcmp(mac, message_end, maclen) != 0)) {
@@ -605,8 +628,16 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED, int argc, const char *
}
}
+#ifdef WITH_OPENSSL
+ if (hmac_size(pamh, debug, &maclen)) {
+ return PAM_SESSION_ERR;
+ }
+#else
+ maclen = hmac_sha1_size();
+#endif /* WITH_OPENSSL */
+
/* Generate the message. */
- text = malloc(strlen(path) + 1 + sizeof(now) + hmac_sha1_size());
+ text = malloc(strlen(path) + 1 + sizeof(now) + maclen);
if (text == NULL) {
pam_syslog(pamh, LOG_CRIT, "unable to allocate memory: %m");
return PAM_SESSION_ERR;
@@ -621,15 +652,21 @@ pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED, int argc, const char *
p += sizeof(now);
/* Generate the MAC and append it to the plaintext. */
- hmac_sha1_generate_file(pamh, &mac, &maclen,
- TIMESTAMPKEY,
- 0, 0,
- text, p - text);
+#ifdef WITH_OPENSSL
+ if (hmac_generate(pamh, debug, &mac, &maclen, TIMESTAMPKEY,
+ ROOT_USER, ROOT_GROUP, text, p - text)) {
+ free(text);
+ return PAM_SESSION_ERR;
+ }
+#else
+ hmac_sha1_generate_file(pamh, &mac, &maclen, TIMESTAMPKEY,
+ ROOT_USER, ROOT_GROUP, text, p - text);
if (mac == NULL) {
pam_syslog(pamh, LOG_ERR, "failure generating MAC: %m");
free(text);
return PAM_SESSION_ERR;
}
+#endif /* WITH_OPENSSL */
memmove(p, mac, maclen);
p += maclen;
free(mac);
--
2.31.1

5
SOURCES/pamtmp.conf Normal file
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@ -0,0 +1,5 @@
d /run/console 0755 root root -
d /run/faillock 0755 root root -
d /run/sepermit 0755 root root -
d /run/motd.d 0755 root root -
f /var/log/tallylog 0600 root root -

18
SOURCES/password-auth.pamd Normal file
View File

@ -0,0 +1,18 @@
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authselect is run.
auth required pam_env.so
auth sufficient pam_unix.so try_first_pass nullok
auth required pam_deny.so
account required pam_unix.so
password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type=
password sufficient pam_unix.so try_first_pass use_authtok nullok sha512 shadow
password required pam_deny.so
session optional pam_keyinit.so revoke
session required pam_limits.so
-session optional pam_systemd.so
session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session required pam_unix.so

46
SOURCES/postlogin.5 Normal file
View File

@ -0,0 +1,46 @@
.TH POSTLOGIN 5 "2010 Dec 22" "Red Hat" "Linux-PAM Manual"
.SH NAME
postlogin \- Common configuration file for PAMified services
.SH SYNOPSIS
.B /etc/pam.d/postlogin
.sp 2
.SH DESCRIPTION
The purpose of this PAM configuration file is to provide a common
place for all PAM modules which should be called after the stack
configured in
.BR system-auth
or the other common PAM configuration files.
.sp
The
.BR postlogin
configuration file is included from all individual service configuration
files that provide login service with shell or file access.
.SH NOTES
The modules in the postlogin configuration file are executed regardless
of the success or failure of the modules in the
.BR system-auth
configuration file.
.SH BUGS
.sp 2
Sometimes it would be useful to be able to skip the postlogin modules in
case the substack of the
.BR system-auth
modules failed. Unfortunately the current Linux-PAM library does not
provide any way how to achieve this.
.SH "SEE ALSO"
pam(8), config-util(5), system-auth(5)
The three
.BR Linux-PAM
Guides, for
.BR "system administrators" ", "
.BR "module developers" ", "
and
.BR "application developers" ". "

8
SOURCES/postlogin.pamd Normal file
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@ -0,0 +1,8 @@
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authselect is run.
session optional pam_umask.so silent
session [success=1 default=ignore] pam_succeed_if.so service !~ gdm* service !~ su* quiet
session [default=1] pam_lastlog.so nowtmp showfailed
session optional pam_lastlog.so silent noupdate showfailed

19
SOURCES/smartcard-auth.pamd Normal file
View File

@ -0,0 +1,19 @@
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authselect is run.
auth required pam_env.so
auth [success=done ignore=ignore default=die] pam_pkcs11.so wait_for_card
auth required pam_deny.so
account required pam_unix.so
account sufficient pam_localuser.so
account sufficient pam_succeed_if.so uid < 500 quiet
account required pam_permit.so
password optional pam_pkcs11.so
session optional pam_keyinit.so revoke
session required pam_limits.so
-session optional pam_systemd.so
session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session required pam_unix.so

58
SOURCES/system-auth.5 Normal file
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@ -0,0 +1,58 @@
.TH SYSTEM-AUTH 5 "2010 Dec 22" "Red Hat" "Linux-PAM Manual"
.SH NAME
system-auth \- Common configuration file for PAMified services
.SH SYNOPSIS
.B /etc/pam.d/system-auth
.B /etc/pam.d/password-auth
.B /etc/pam.d/fingerprint-auth
.B /etc/pam.d/smartcard-auth
.sp 2
.SH DESCRIPTION
The purpose of these configuration files are to provide a common
interface for all applications and service daemons calling into
the PAM library.
.sp
The
.BR system-auth
configuration file is included from nearly all individual service configuration
files with the help of the
.BR substack
directive.
.sp
The
.BR password-auth
.BR fingerprint-auth
.BR smartcard-auth
configuration files are for applications which handle authentication from
different types of devices via simultaneously running individual conversations
instead of one aggregate conversation.
.SH NOTES
Previously these common configuration files were included with the help
of the
.BR include
directive. This limited the use of the different action types of modules.
With the use of
.BR substack
directive to include these common configuration files this limitation
no longer applies.
.SH BUGS
.sp 2
None known.
.SH "SEE ALSO"
pam(8), config-util(5), postlogin(5)
The three
.BR Linux-PAM
Guides, for
.BR "system administrators" ", "
.BR "module developers" ", "
and
.BR "application developers" ". "

18
SOURCES/system-auth.pamd Normal file
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@ -0,0 +1,18 @@
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authselect is run.
auth required pam_env.so
auth sufficient pam_unix.so try_first_pass nullok
auth required pam_deny.so
account required pam_unix.so
password requisite pam_pwquality.so try_first_pass local_users_only retry=3 authtok_type=
password sufficient pam_unix.so try_first_pass use_authtok nullok sha512 shadow
password required pam_deny.so
session optional pam_keyinit.so revoke
session required pam_limits.so
-session optional pam_systemd.so
session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session required pam_unix.so

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