diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/Makefile.am.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/Makefile.am
--- Linux-PAM-1.3.1/modules/pam_pwhistory/Makefile.am.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.709355179 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/Makefile.am 2022-09-29 10:13:35.780355766 +0200
@@ -10,9 +10,10 @@ EXTRA_DIST = README $(MANS) $(XMLS) tst-
TESTS = tst-pam_pwhistory
-man_MANS = pam_pwhistory.8 pwhistory_helper.8
+man_MANS = pam_pwhistory.8 pwhistory_helper.8 pwhistory.conf.5
-XMLS = README.xml pam_pwhistory.8.xml pwhistory_helper.8.xml
+XMLS = README.xml pam_pwhistory.8.xml pwhistory_helper.8.xml \
+ pwhistory.conf.5.xml
securelibdir = $(SECUREDIR)
secureconfdir = $(SCONFIGDIR)
@@ -25,12 +26,14 @@ if HAVE_VERSIONING
pam_pwhistory_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
endif
-noinst_HEADERS = opasswd.h
+noinst_HEADERS = opasswd.h pwhistory_config.h
+
+dist_secureconf_DATA = pwhistory.conf
securelib_LTLIBRARIES = pam_pwhistory.la
pam_pwhistory_la_CFLAGS = $(AM_CFLAGS)
pam_pwhistory_la_LIBADD = $(top_builddir)/libpam/libpam.la @LIBCRYPT@ @LIBSELINUX@
-pam_pwhistory_la_SOURCES = pam_pwhistory.c opasswd.c
+pam_pwhistory_la_SOURCES = pam_pwhistory.c opasswd.c pwhistory_config.c
sbin_PROGRAMS = pwhistory_helper
pwhistory_helper_CFLAGS = $(AM_CFLAGS) -DHELPER_COMPILE=\"pwhistory_helper\" @PIE_CFLAGS@
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.8.xml.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.8.xml
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.8.xml.pam-pwhistory-load-conf-from-file 2017-02-10 11:10:15.000000000 +0100
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.8.xml 2022-09-29 10:13:35.780355766 +0200
@@ -36,6 +36,9 @@
authtok_type=STRING
+
+ conf=/path/to/config-file
+
@@ -104,7 +107,7 @@
The last N passwords for each
- user are saved in /etc/security/opasswd.
+ user are saved.
The default is 10. Value of
0 makes the module to keep the existing
contents of the opasswd file unchanged.
@@ -137,7 +140,26 @@
+
+
+
+
+
+
+ Use another configuration file instead of the default
+ /etc/security/pwhistory.conf.
+
+
+
+
+
+ The options for configuring the module behavior are described in the
+ pwhistory.conf
+ 5 manual page. The options
+ specified on the module command line override the values from the
+ configuration file.
+
@@ -223,6 +245,9 @@ password required pam_unix.so
SEE ALSO
+ pwhistory.conf5
+ ,
+ pam.conf5,
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.c.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.c
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.c.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.711355195 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pam_pwhistory.c 2022-09-29 10:13:35.780355766 +0200
@@ -62,18 +62,11 @@
#include
#include "opasswd.h"
+#include "pwhistory_config.h"
#define DEFAULT_BUFLEN 2048
#define MAX_FD_NO 20000
-struct options_t {
- int debug;
- int enforce_for_root;
- int remember;
- int tries;
-};
-typedef struct options_t options_t;
-
static void
parse_option (pam_handle_t *pamh, const char *argv, options_t *options)
@@ -304,6 +297,8 @@ pam_sm_chauthtok (pam_handle_t *pamh, in
options.remember = 10;
options.tries = 1;
+ parse_config_file(pamh, argc, argv, &options);
+
/* Parse parameters for module */
for ( ; argc-- > 0; argv++)
parse_option (pamh, *argv, &options);
@@ -311,7 +306,6 @@ pam_sm_chauthtok (pam_handle_t *pamh, in
if (options.debug)
pam_syslog (pamh, LOG_DEBUG, "pam_sm_chauthtok entered");
-
if (options.remember == 0)
return PAM_IGNORE;
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.5.xml.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.5.xml
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.5.xml.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.780355766 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.5.xml 2022-09-29 10:13:35.780355766 +0200
@@ -0,0 +1,155 @@
+
+
+
+
+
+
+ pwhistory.conf
+ 5
+ Linux-PAM Manual
+
+
+
+ pwhistory.conf
+ pam_pwhistory configuration file
+
+
+
+
+ DESCRIPTION
+
+ pwhistory.conf provides a way to configure the
+ default settings for saving the last passwords for each user.
+ This file is read by the pam_pwhistory module and is the
+ preferred method over configuring pam_pwhistory directly.
+
+
+ The file has a very simple name = value format with possible comments
+ starting with # character. The whitespace at the beginning of line, end
+ of line, and around the = sign is ignored.
+
+
+
+
+
+ OPTIONS
+
+
+
+
+
+
+
+ Turns on debugging via
+
+ syslog3
+ .
+
+
+
+
+
+
+
+
+
+ If this option is set, the check is enforced for root, too.
+
+
+
+
+
+
+
+
+
+ The last N passwords for each
+ user are saved.
+ The default is 10. Value of
+ 0 makes the module to keep the existing
+ contents of the opasswd file unchanged.
+
+
+
+
+
+
+
+
+
+ Prompt user at most N times
+ before returning with error. The default is 1.
+
+
+
+
+
+
+
+
+
+ Store password history in file
+ /path/filename rather than the default
+ location. The default location is
+ /etc/security/opasswd.
+
+
+
+
+
+
+
+ EXAMPLES
+
+ /etc/security/pwhistory.conf file example:
+
+
+debug
+remember=5
+file=/tmp/opasswd
+
+
+
+
+ FILES
+
+
+ /etc/security/pwhistory.conf
+
+ the config file for custom options
+
+
+
+
+
+
+ SEE ALSO
+
+
+ pwhistory8
+ ,
+
+ pam_pwhistory8
+ ,
+
+ pam.conf5
+ ,
+
+ pam.d5
+ ,
+
+ pam8
+
+
+
+
+
+ AUTHOR
+
+ pam_pwhistory was written by Thorsten Kukuk. The support for
+ pwhistory.conf was written by Iker Pedrosa.
+
+
+
+
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.c.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.c
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.c.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.781355775 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.c 2022-09-29 10:14:33.377832622 +0200
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2022 Iker Pedrosa
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions. (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include
+#include
+#include
+#include
+#include
+
+#include
+
+#include "pam_inline.h"
+#include "pwhistory_config.h"
+
+#define PWHISTORY_DEFAULT_CONF "/etc/security/pwhistory.conf"
+
+/* lookup a value for key in login.defs file or similar key value format */
+static char *
+pwhistory_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;
+
+#ifdef USE_ECONF
+ if (strcmp (file_name, LOGIN_DEFS) == 0)
+ return econf_search_key ("login", ".defs", key);
+#endif
+
+ 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 = buf + n; /* empty string */
+
+ if (strcasecmp(tmp, key) == 0) {
+ retval = strdup(cp);
+ break;
+ }
+ }
+ fclose(fp);
+
+ free(buf);
+
+ return retval;
+}
+
+void
+parse_config_file(pam_handle_t *pamh, int argc, const char **argv,
+ struct options_t *options)
+{
+ const char *fname = NULL;
+ int i;
+ char *val;
+
+ for (i = 0; i < argc; ++i) {
+ const char *str = pam_str_skip_prefix(argv[i], "conf=");
+
+ if (str != NULL) {
+ fname = str;
+ }
+ }
+
+ if (fname == NULL) {
+ fname = PWHISTORY_DEFAULT_CONF;
+ }
+
+ val = pwhistory_search_key (pamh, fname, "debug");
+ if (val != NULL) {
+ options->debug = 1;
+ free(val);
+ }
+
+ val = pwhistory_search_key (pamh, fname, "enforce_for_root");
+ if (val != NULL) {
+ options->enforce_for_root = 1;
+ free(val);
+ }
+
+ val = pwhistory_search_key (pamh, fname, "remember");
+ if (val != NULL) {
+ unsigned int temp;
+ if (sscanf(val, "%u", &temp) != 1) {
+ pam_syslog(pamh, LOG_ERR,
+ "Bad number supplied for remember argument");
+ } else {
+ options->remember = temp;
+ }
+ free(val);
+ }
+
+ val = pwhistory_search_key (pamh, fname, "retry");
+ if (val != NULL) {
+ unsigned int temp;
+ if (sscanf(val, "%u", &temp) != 1) {
+ pam_syslog(pamh, LOG_ERR,
+ "Bad number supplied for retry argument");
+ } else {
+ options->tries = temp;
+ }
+ free(val);
+ }
+
+ val = pwhistory_search_key (pamh, fname, "file");
+ if (val != NULL) {
+ if (*val != '/') {
+ pam_syslog (pamh, LOG_ERR,
+ "File path should be absolute: %s", val);
+ } else {
+ options->filename = val;
+ }
+ }
+}
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.h.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.h
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.h.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.781355775 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory_config.h 2022-09-29 10:13:35.781355775 +0200
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022 Iker Pedrosa
+ *
+ * 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 _PWHISTORY_CONFIG_H
+#define _PWHISTORY_CONFIG_H
+
+#include
+
+struct options_t {
+ int debug;
+ int enforce_for_root;
+ int remember;
+ int tries;
+ const char *filename;
+};
+typedef struct options_t options_t;
+
+void
+parse_config_file(pam_handle_t *pamh, int argc, const char **argv,
+ struct options_t *options);
+
+#endif /* _PWHISTORY_CONFIG_H */
diff -up Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.pam-pwhistory-load-conf-from-file Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf
--- Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf.pam-pwhistory-load-conf-from-file 2022-09-29 10:13:35.781355775 +0200
+++ Linux-PAM-1.3.1/modules/pam_pwhistory/pwhistory.conf 2022-09-29 10:13:35.781355775 +0200
@@ -0,0 +1,21 @@
+# Configuration for remembering the last passwords used by a user.
+#
+# Enable the debugging logs.
+# Enabled if option is present.
+# debug
+#
+# root account's passwords are also remembered.
+# Enabled if option is present.
+# enforce_for_root
+#
+# Number of passwords to remember.
+# The default is 10.
+# remember = 10
+#
+# Number of times to prompt for the password.
+# The default is 1.
+# retry = 1
+#
+# The directory where the last passwords are kept.
+# The default is /etc/security/opasswd.
+# file = /etc/security/opasswd