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-rw-r--r--modules/pam_tally/Makefile.am39
-rw-r--r--modules/pam_tally/Makefile.in1221
-rw-r--r--modules/pam_tally/README145
-rw-r--r--modules/pam_tally/README.xml41
-rw-r--r--modules/pam_tally/faillog.h55
-rw-r--r--modules/pam_tally/pam_tally.8256
-rw-r--r--modules/pam_tally/pam_tally.8.xml459
-rw-r--r--modules/pam_tally/pam_tally.c853
-rw-r--r--modules/pam_tally/pam_tally_app.c6
-rwxr-xr-xmodules/pam_tally/tst-pam_tally2
10 files changed, 3077 insertions, 0 deletions
diff --git a/modules/pam_tally/Makefile.am b/modules/pam_tally/Makefile.am
new file mode 100644
index 0000000..3a97394
--- /dev/null
+++ b/modules/pam_tally/Makefile.am
@@ -0,0 +1,39 @@
+#
+# Copyright (c) 2005, 2006, 2007, 2009 Thorsten Kukuk <kukuk@thkukuk.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = $(XMLS)
+
+if HAVE_DOC
+dist_man_MANS = pam_tally.8
+endif
+XMLS = README.xml pam_tally.8.xml
+dist_check_SCRIPTS = tst-pam_tally
+TESTS = $(dist_check_SCRIPTS)
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+noinst_HEADERS = faillog.h
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ $(WARN_CFLAGS)
+
+pam_tally_la_LDFLAGS = -no-undefined -avoid-version -module
+pam_tally_la_LIBADD = $(top_builddir)/libpam/libpam.la
+if HAVE_VERSIONING
+ pam_tally_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_tally.la
+sbin_PROGRAMS = pam_tally
+
+pam_tally_SOURCES = pam_tally_app.c
+
+if ENABLE_REGENERATE_MAN
+dist_noinst_DATA = README
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_tally/Makefile.in b/modules/pam_tally/Makefile.in
new file mode 100644
index 0000000..3d11dd9
--- /dev/null
+++ b/modules/pam_tally/Makefile.in
@@ -0,0 +1,1221 @@
+# Makefile.in generated by automake 1.16.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
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diff --git a/modules/pam_tally/README b/modules/pam_tally/README
new file mode 100644
index 0000000..c88e2a2
--- /dev/null
+++ b/modules/pam_tally/README
@@ -0,0 +1,145 @@
+pam_tally — The login counter (tallying) module
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+This module maintains a count of attempted accesses, can reset count on
+success, can deny access if too many attempts fail.
+
+pam_tally has several limitations, which are solved with pam_tally2. For this
+reason pam_tally is deprecated and will be removed in a future release.
+
+pam_tally comes in two parts: pam_tally.so and pam_tally. The former is the PAM
+module and the latter, a stand-alone program. pam_tally is an (optional)
+application which can be used to interrogate and manipulate the counter file.
+It can display user counts, set individual counts, or clear all counts. Setting
+artificially high counts may be useful for blocking users without changing
+their passwords. For example, one might find it useful to clear all counts
+every midnight from a cron job. The faillog(8) command can be used instead of
+pam_tally to to maintain the counter file.
+
+Normally, failed attempts to access root will not cause the root account to
+become blocked, to prevent denial-of-service: if your users aren't given shell
+accounts and root may only login via su or at the machine console (not telnet/
+rsh, etc), this is safe.
+
+OPTIONS
+
+GLOBAL OPTIONS
+
+ This can be used for auth and account module types.
+
+ onerr=[fail|succeed]
+
+ If something weird happens (like unable to open the file), return with
+ PAM_SUCCESS if onerr=succeed is given, else with the corresponding PAM
+ error code.
+
+ file=/path/to/counter
+
+ File where to keep counts. Default is /var/log/faillog.
+
+ audit
+
+ Will log the user name into the system log if the user is not found.
+
+ silent
+
+ Don't print informative messages. The messages printed without the
+ silent option leak presence of accounts on the system because they are
+ not printed for non-existing accounts.
+
+ no_log_info
+
+ Don't log informative messages via syslog(3).
+
+AUTH OPTIONS
+
+ Authentication phase first checks if user should be denied access and if
+ not it increments attempted login counter. Then on call to pam_setcred(3)
+ it resets the attempts counter.
+
+ deny=n
+
+ Deny access if tally for this user exceeds n.
+
+ lock_time=n
+
+ Always deny for n seconds after failed attempt.
+
+ unlock_time=n
+
+ Allow access after n seconds after failed attempt. If this option is
+ used the user will be locked out for the specified amount of time after
+ he exceeded his maximum allowed attempts. Otherwise the account is
+ locked until the lock is removed by a manual intervention of the system
+ administrator.
+
+ magic_root
+
+ If the module is invoked by a user with uid=0 the counter is not
+ incremented. The sysadmin should use this for user launched services,
+ like su, otherwise this argument should be omitted.
+
+ no_lock_time
+
+ Do not use the .fail_locktime field in /var/log/faillog for this user.
+
+ no_reset
+
+ Don't reset count on successful entry, only decrement.
+
+ even_deny_root_account
+
+ Root account can become unavailable.
+
+ per_user
+
+ If /var/log/faillog contains a non-zero .fail_max/.fail_locktime field
+ for this user then use it instead of deny=n/ lock_time=n parameter.
+
+ no_lock_time
+
+ Don't use .fail_locktime filed in /var/log/faillog for this user.
+
+ACCOUNT OPTIONS
+
+ Account phase resets attempts counter if the user is not magic root. This
+ phase can be used optionally for services which don't call pam_setcred(3)
+ correctly or if the reset should be done regardless of the failure of the
+ account phase of other modules.
+
+ magic_root
+
+ If the module is invoked by a user with uid=0 the counter is not
+ incremented. The sysadmin should use this for user launched services,
+ like su, otherwise this argument should be omitted.
+
+ no_reset
+
+ Don't reset count on successful entry, only decrement.
+
+EXAMPLES
+
+Add the following line to /etc/pam.d/login to lock the account after too many
+failed logins. The number of allowed fails is specified by /var/log/faillog and
+needs to be set with pam_tally or faillog(8) before.
+
+auth required pam_securetty.so
+auth required pam_tally.so per_user
+auth required pam_env.so
+auth required pam_unix.so
+auth required pam_nologin.so
+account required pam_unix.so
+password required pam_unix.so
+session required pam_limits.so
+session required pam_unix.so
+session required pam_lastlog.so nowtmp
+session optional pam_mail.so standard
+
+
+AUTHOR
+
+pam_tally was written by Tim Baverstock and Tomas Mraz.
+
diff --git a/modules/pam_tally/README.xml b/modules/pam_tally/README.xml
new file mode 100644
index 0000000..3c6de50
--- /dev/null
+++ b/modules/pam_tally/README.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+"http://www.docbook.org/xml/4.3/docbookx.dtd"
+[
+<!--
+<!ENTITY pamaccess SYSTEM "pam_tally.8.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_tally.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_tally-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_tally.8.xml" xpointer='xpointer(//refsect1[@id = "pam_tally-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_tally.8.xml" xpointer='xpointer(//refsect1[@id = "pam_tally-options"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_tally.8.xml" xpointer='xpointer(//refsect1[@id = "pam_tally-examples"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_tally.8.xml" xpointer='xpointer(//refsect1[@id = "pam_tally-author"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_tally/faillog.h b/modules/pam_tally/faillog.h
new file mode 100644
index 0000000..9075639
--- /dev/null
+++ b/modules/pam_tally/faillog.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 1989 - 1994, Julianne Frances Haugh
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 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. Neither the name of Julianne F. Haugh nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``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 JULIE HAUGH OR CONTRIBUTORS 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.
+ */
+
+/*
+ * faillog.h - login failure logging file format
+ *
+ * $Id$
+ *
+ * The login failure file is maintained by login(1) and faillog(8)
+ * Each record in the file represents a separate UID and the file
+ * is indexed in that fashion.
+ */
+
+#ifndef _FAILLOG_H
+#define _FAILLOG_H
+
+struct faillog {
+ short fail_cnt; /* failures since last success */
+ short fail_max; /* failures before turning account off */
+ char fail_line[12]; /* last failure occurred here */
+ time_t fail_time; /* last failure occurred then */
+ /*
+ * If nonzero, the account will be re-enabled if there are no
+ * failures for fail_locktime seconds since last failure.
+ */
+ long fail_locktime;
+};
+
+#endif
diff --git a/modules/pam_tally/pam_tally.8 b/modules/pam_tally/pam_tally.8
new file mode 100644
index 0000000..f4d3350
--- /dev/null
+++ b/modules/pam_tally/pam_tally.8
@@ -0,0 +1,256 @@
+'\" t
+.\" Title: pam_tally
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
+.\" Date: 06/08/2020
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_TALLY" "8" "06/08/2020" "Linux-PAM Manual" "Linux\-PAM Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+pam_tally \- The login counter (tallying) module
+.SH "SYNOPSIS"
+.HP \w'\fBpam_tally\&.so\fR\ 'u
+\fBpam_tally\&.so\fR [file=\fI/path/to/counter\fR] [onerr=[\fIfail\fR|\fIsucceed\fR]] [magic_root] [even_deny_root_account] [deny=\fIn\fR] [lock_time=\fIn\fR] [unlock_time=\fIn\fR] [per_user] [no_lock_time] [no_reset] [audit] [silent] [no_log_info]
+.HP \w'\fBpam_tally\fR\ 'u
+\fBpam_tally\fR [\-\-file\ \fI/path/to/counter\fR] [\-\-user\ \fIusername\fR] [\-\-reset[=\fIn\fR]] [\-\-quiet]
+.SH "DESCRIPTION"
+.PP
+This module maintains a count of attempted accesses, can reset count on success, can deny access if too many attempts fail\&.
+.PP
+pam_tally has several limitations, which are solved with pam_tally2\&. For this reason pam_tally is deprecated and will be removed in a future release\&.
+.PP
+pam_tally comes in two parts:
+\fBpam_tally\&.so\fR
+and
+\fBpam_tally\fR\&. The former is the PAM module and the latter, a stand\-alone program\&.
+\fBpam_tally\fR
+is an (optional) application which can be used to interrogate and manipulate the counter file\&. It can display user counts, set individual counts, or clear all counts\&. Setting artificially high counts may be useful for blocking users without changing their passwords\&. For example, one might find it useful to clear all counts every midnight from a cron job\&. The
+\fBfaillog\fR(8)
+command can be used instead of pam_tally to to maintain the counter file\&.
+.PP
+Normally, failed attempts to access
+\fIroot\fR
+will
+\fBnot\fR
+cause the root account to become blocked, to prevent denial\-of\-service: if your users aren\*(Aqt given shell accounts and root may only login via
+\fBsu\fR
+or at the machine console (not telnet/rsh, etc), this is safe\&.
+.SH "OPTIONS"
+.PP
+GLOBAL OPTIONS
+.RS 4
+This can be used for
+\fIauth\fR
+and
+\fIaccount\fR
+module types\&.
+.PP
+\fBonerr=[\fR\fB\fIfail\fR\fR\fB|\fR\fB\fIsucceed\fR\fR\fB]\fR
+.RS 4
+If something weird happens (like unable to open the file), return with
+\fBPAM_SUCCESS\fR
+if
+\fBonerr=\fR\fB\fIsucceed\fR\fR
+is given, else with the corresponding PAM error code\&.
+.RE
+.PP
+\fBfile=\fR\fB\fI/path/to/counter\fR\fR
+.RS 4
+File where to keep counts\&. Default is
+/var/log/faillog\&.
+.RE
+.PP
+\fBaudit\fR
+.RS 4
+Will log the user name into the system log if the user is not found\&.
+.RE
+.PP
+\fBsilent\fR
+.RS 4
+Don\*(Aqt print informative messages\&. The messages printed without the
+\fIsilent\fR
+option leak presence of accounts on the system because they are not printed for non\-existing accounts\&.
+.RE
+.PP
+\fBno_log_info\fR
+.RS 4
+Don\*(Aqt log informative messages via
+\fBsyslog\fR(3)\&.
+.RE
+.RE
+.PP
+AUTH OPTIONS
+.RS 4
+Authentication phase first checks if user should be denied access and if not it increments attempted login counter\&. Then on call to
+\fBpam_setcred\fR(3)
+it resets the attempts counter\&.
+.PP
+\fBdeny=\fR\fB\fIn\fR\fR
+.RS 4
+Deny access if tally for this user exceeds
+\fIn\fR\&.
+.RE
+.PP
+\fBlock_time=\fR\fB\fIn\fR\fR
+.RS 4
+Always deny for
+\fIn\fR
+seconds after failed attempt\&.
+.RE
+.PP
+\fBunlock_time=\fR\fB\fIn\fR\fR
+.RS 4
+Allow access after
+\fIn\fR
+seconds after failed attempt\&. If this option is used the user will be locked out for the specified amount of time after he exceeded his maximum allowed attempts\&. Otherwise the account is locked until the lock is removed by a manual intervention of the system administrator\&.
+.RE
+.PP
+\fBmagic_root\fR
+.RS 4
+If the module is invoked by a user with uid=0 the counter is not incremented\&. The sysadmin should use this for user launched services, like
+\fBsu\fR, otherwise this argument should be omitted\&.
+.RE
+.PP
+\fBno_lock_time\fR
+.RS 4
+Do not use the \&.fail_locktime field in
+/var/log/faillog
+for this user\&.
+.RE
+.PP
+\fBno_reset\fR
+.RS 4
+Don\*(Aqt reset count on successful entry, only decrement\&.
+.RE
+.PP
+\fBeven_deny_root_account\fR
+.RS 4
+Root account can become unavailable\&.
+.RE
+.PP
+\fBper_user\fR
+.RS 4
+If
+/var/log/faillog
+contains a non\-zero \&.fail_max/\&.fail_locktime field for this user then use it instead of
+\fBdeny=\fR\fB\fIn\fR\fR/
+\fBlock_time=\fR\fB\fIn\fR\fR
+parameter\&.
+.RE
+.PP
+\fBno_lock_time\fR
+.RS 4
+Don\*(Aqt use \&.fail_locktime filed in
+/var/log/faillog
+for this user\&.
+.RE
+.RE
+.PP
+ACCOUNT OPTIONS
+.RS 4
+Account phase resets attempts counter if the user is
+\fBnot\fR
+magic root\&. This phase can be used optionally for services which don\*(Aqt call
+\fBpam_setcred\fR(3)
+correctly or if the reset should be done regardless of the failure of the account phase of other modules\&.
+.PP
+\fBmagic_root\fR
+.RS 4
+If the module is invoked by a user with uid=0 the counter is not incremented\&. The sysadmin should use this for user launched services, like
+\fBsu\fR, otherwise this argument should be omitted\&.
+.RE
+.PP
+\fBno_reset\fR
+.RS 4
+Don\*(Aqt reset count on successful entry, only decrement\&.
+.RE
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+The
+\fBauth\fR
+and
+\fBaccount\fR
+module types are provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_AUTH_ERR
+.RS 4
+A invalid option was given, the module was not able to retrieve the user name, no valid counter file was found, or too many failed logins\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Everything was successful\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known\&.
+.RE
+.SH "EXAMPLES"
+.PP
+Add the following line to
+/etc/pam\&.d/login
+to lock the account after too many failed logins\&. The number of allowed fails is specified by
+/var/log/faillog
+and needs to be set with pam_tally or
+\fBfaillog\fR(8)
+before\&.
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+auth required pam_securetty\&.so
+auth required pam_tally\&.so per_user
+auth required pam_env\&.so
+auth required pam_unix\&.so
+auth required pam_nologin\&.so
+account required pam_unix\&.so
+password required pam_unix\&.so
+session required pam_limits\&.so
+session required pam_unix\&.so
+session required pam_lastlog\&.so nowtmp
+session optional pam_mail\&.so standard
+
+.fi
+.if n \{\
+.RE
+.\}
+.SH "FILES"
+.PP
+/var/log/faillog
+.RS 4
+failure logging file
+.RE
+.SH "SEE ALSO"
+.PP
+\fBfaillog\fR(8),
+\fBpam.conf\fR(5),
+\fBpam.d\fR(5),
+\fBpam\fR(8)
+.SH "AUTHOR"
+.PP
+pam_tally was written by Tim Baverstock and Tomas Mraz\&.
diff --git a/modules/pam_tally/pam_tally.8.xml b/modules/pam_tally/pam_tally.8.xml
new file mode 100644
index 0000000..80ad060
--- /dev/null
+++ b/modules/pam_tally/pam_tally.8.xml
@@ -0,0 +1,459 @@
+<?xml version="1.0" encoding='UTF-8'?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+ "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
+
+<refentry id="pam_tally">
+
+ <refmeta>
+ <refentrytitle>pam_tally</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id="pam_tally-name">
+ <refname>pam_tally</refname>
+ <refpurpose>The login counter (tallying) module</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_tally-cmdsynopsis1">
+ <command>pam_tally.so</command>
+ <arg choice="opt">
+ file=<replaceable>/path/to/counter</replaceable>
+ </arg>
+ <arg choice="opt">
+ onerr=[<replaceable>fail</replaceable>|<replaceable>succeed</replaceable>]
+ </arg>
+ <arg choice="opt">
+ magic_root
+ </arg>
+ <arg choice="opt">
+ even_deny_root_account
+ </arg>
+ <arg choice="opt">
+ deny=<replaceable>n</replaceable>
+ </arg>
+ <arg choice="opt">
+ lock_time=<replaceable>n</replaceable>
+ </arg>
+ <arg choice="opt">
+ unlock_time=<replaceable>n</replaceable>
+ </arg>
+ <arg choice="opt">
+ per_user
+ </arg>
+ <arg choice="opt">
+ no_lock_time
+ </arg>
+ <arg choice="opt">
+ no_reset
+ </arg>
+ <arg choice="opt">
+ audit
+ </arg>
+ <arg choice="opt">
+ silent
+ </arg>
+ <arg choice="opt">
+ no_log_info
+ </arg>
+ </cmdsynopsis>
+ <cmdsynopsis id="pam_tally-cmdsynopsis2">
+ <command>pam_tally</command>
+ <arg choice="opt">
+ --file <replaceable>/path/to/counter</replaceable>
+ </arg>
+ <arg choice="opt">
+ --user <replaceable>username</replaceable>
+ </arg>
+ <arg choice="opt">
+ --reset[=<replaceable>n</replaceable>]
+ </arg>
+ <arg choice="opt">
+ --quiet
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id="pam_tally-description">
+
+ <title>DESCRIPTION</title>
+
+ <para>
+ This module maintains a count of attempted accesses, can
+ reset count on success, can deny access if too many attempts
+ fail.
+ </para>
+ <para>
+ pam_tally has several limitations, which are solved with
+ pam_tally2. For this reason pam_tally is deprecated and
+ will be removed in a future release.
+ </para>
+ <para>
+ pam_tally comes in two parts:
+ <emphasis remap='B'>pam_tally.so</emphasis> and
+ <command>pam_tally</command>. The former is the PAM module and
+ the latter, a stand-alone program. <command>pam_tally</command>
+ is an (optional) application which can be used to interrogate and
+ manipulate the counter file. It can display user counts, set
+ individual counts, or clear all counts. Setting artificially high
+ counts may be useful for blocking users without changing their
+ passwords. For example, one might find it useful to clear all counts
+ every midnight from a cron job. The
+ <citerefentry>
+ <refentrytitle>faillog</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry> command can be used instead of pam_tally to to
+ maintain the counter file.
+ </para>
+ <para>
+ Normally, failed attempts to access <emphasis>root</emphasis> will
+ <emphasis remap='B'>not</emphasis> cause the root account to become
+ blocked, to prevent denial-of-service: if your users aren't given
+ shell accounts and root may only login via <command>su</command> or
+ at the machine console (not telnet/rsh, etc), this is safe.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_tally-options">
+
+ <title>OPTIONS</title>
+ <variablelist>
+ <varlistentry>
+ <term>
+ GLOBAL OPTIONS
+ </term>
+ <listitem>
+ <para>
+ This can be used for <emphasis>auth</emphasis> and
+ <emphasis>account</emphasis> module types.
+ </para>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>onerr=[<replaceable>fail</replaceable>|<replaceable>succeed</replaceable>]</option>
+ </term>
+ <listitem>
+ <para>
+ If something weird happens (like unable to open the file),
+ return with <errorcode>PAM_SUCCESS</errorcode> if
+ <option>onerr=<replaceable>succeed</replaceable></option>
+ is given, else with the corresponding PAM error code.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>file=<replaceable>/path/to/counter</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ File where to keep counts. Default is
+ <filename>/var/log/faillog</filename>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>audit</option>
+ </term>
+ <listitem>
+ <para>
+ Will log the user name into the system log if the user is not found.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>silent</option>
+ </term>
+ <listitem>
+ <para>
+ Don't print informative messages. The messages printed without the <emphasis>silent</emphasis> option leak presence of accounts on the system because they are not printed for non-existing accounts.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>no_log_info</option>
+ </term>
+ <listitem>
+ <para>
+ Don't log informative messages via <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ AUTH OPTIONS
+ </term>
+ <listitem>
+ <para>
+ Authentication phase first checks if user should be denied
+ access and if not it increments attempted login counter. Then
+ on call to <citerefentry>
+ <refentrytitle>pam_setcred</refentrytitle><manvolnum>3</manvolnum>
+ </citerefentry> it resets the attempts counter.
+ </para>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>deny=<replaceable>n</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Deny access if tally for this user exceeds
+ <replaceable>n</replaceable>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>lock_time=<replaceable>n</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Always deny for <replaceable>n</replaceable> seconds
+ after failed attempt.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>unlock_time=<replaceable>n</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Allow access after <replaceable>n</replaceable> seconds
+ after failed attempt. If this option is used the user will
+ be locked out for the specified amount of time after he
+ exceeded his maximum allowed attempts. Otherwise the
+ account is locked until the lock is removed by a manual
+ intervention of the system administrator.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>magic_root</option>
+ </term>
+ <listitem>
+ <para>
+ If the module is invoked by a user with uid=0 the
+ counter is not incremented. The sysadmin should use this
+ for user launched services, like <command>su</command>,
+ otherwise this argument should be omitted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>no_lock_time</option>
+ </term>
+ <listitem>
+ <para>
+ Do not use the .fail_locktime field in
+ <filename>/var/log/faillog</filename> for this user.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>no_reset</option>
+ </term>
+ <listitem>
+ <para>
+ Don't reset count on successful entry, only decrement.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>even_deny_root_account</option>
+ </term>
+ <listitem>
+ <para>
+ Root account can become unavailable.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>per_user</option>
+ </term>
+ <listitem>
+ <para>
+ If <filename>/var/log/faillog</filename> contains a non-zero
+ .fail_max/.fail_locktime field for this user then use it
+ instead of <option>deny=<replaceable>n</replaceable></option>/
+ <option>lock_time=<replaceable>n</replaceable></option> parameter.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>no_lock_time</option>
+ </term>
+ <listitem>
+ <para>
+ Don't use .fail_locktime filed in
+ <filename>/var/log/faillog</filename> for this user.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </listitem>
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>
+ ACCOUNT OPTIONS
+ </term>
+ <listitem>
+ <para>
+ Account phase resets attempts counter if the user is
+ <emphasis remap='B'>not</emphasis> magic root.
+ This phase can be used optionally for services which don't call
+ <citerefentry>
+ <refentrytitle>pam_setcred</refentrytitle><manvolnum>3</manvolnum>
+ </citerefentry> correctly or if the reset should be done regardless
+ of the failure of the account phase of other modules.
+ </para>
+ <variablelist>
+ <varlistentry>
+ <term>
+ <option>magic_root</option>
+ </term>
+ <listitem>
+ <para>
+ If the module is invoked by a user with uid=0 the
+ counter is not incremented. The sysadmin should use this
+ for user launched services, like <command>su</command>,
+ otherwise this argument should be omitted.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>
+ <option>no_reset</option>
+ </term>
+ <listitem>
+ <para>
+ Don't reset count on successful entry, only decrement.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_tally-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ The <option>auth</option> and <option>account</option>
+ module types are provided.
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_tally-return_values'>
+ <title>RETURN VALUES</title>
+ <variablelist>
+ <varlistentry>
+ <term>PAM_AUTH_ERR</term>
+ <listitem>
+ <para>
+ A invalid option was given, the module was not able
+ to retrieve the user name, no valid counter file
+ was found, or too many failed logins.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Everything was successful.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_USER_UNKNOWN</term>
+ <listitem>
+ <para>
+ User not known.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='pam_tally-examples'>
+ <title>EXAMPLES</title>
+ <para>
+ Add the following line to <filename>/etc/pam.d/login</filename> to
+ lock the account after too many failed logins. The number of
+ allowed fails is specified by <filename>/var/log/faillog</filename>
+ and needs to be set with pam_tally or <citerefentry>
+ <refentrytitle>faillog</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry> before.
+ </para>
+ <programlisting>
+auth required pam_securetty.so
+auth required pam_tally.so per_user
+auth required pam_env.so
+auth required pam_unix.so
+auth required pam_nologin.so
+account required pam_unix.so
+password required pam_unix.so
+session required pam_limits.so
+session required pam_unix.so
+session required pam_lastlog.so nowtmp
+session optional pam_mail.so standard
+ </programlisting>
+ </refsect1>
+
+ <refsect1 id="pam_tally-files">
+ <title>FILES</title>
+ <variablelist>
+ <varlistentry>
+ <term><filename>/var/log/faillog</filename></term>
+ <listitem>
+ <para>failure logging file</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='pam_tally-see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>faillog</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id='pam_tally-author'>
+ <title>AUTHOR</title>
+ <para>
+ pam_tally was written by Tim Baverstock and Tomas Mraz.
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/modules/pam_tally/pam_tally.c b/modules/pam_tally/pam_tally.c
new file mode 100644
index 0000000..34ae624
--- /dev/null
+++ b/modules/pam_tally/pam_tally.c
@@ -0,0 +1,853 @@
+/*
+ * pam_tally module
+ *
+ * By Tim Baverstock <warwick@mmm.co.uk>, Multi Media Machine Ltd.
+ * 5 March 1997
+ *
+ * Stuff stolen from pam_rootok and pam_listfile
+ *
+ * Changes by Tomas Mraz <tmraz@redhat.com> 5 January 2005
+ * Audit option added for Tomas patch by
+ * Sebastien Tricaud <toady@gscore.org> 13 January 2005
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <pwd.h>
+#include <time.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include "faillog.h"
+
+#ifndef MAIN
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+#endif
+#include <security/pam_modules.h>
+#include "pam_inline.h"
+
+#ifndef TRUE
+#define TRUE 1L
+#define FALSE 0L
+#endif
+
+#ifndef HAVE_FSEEKO
+#define fseeko fseek
+#endif
+
+/*---------------------------------------------------------------------*/
+
+#define DEFAULT_LOGFILE "/var/log/faillog"
+#define MODULE_NAME "pam_tally"
+
+#define tally_t unsigned short int
+#define TALLY_FMT "%hu"
+#define TALLY_HI ((tally_t)~0L)
+
+#ifndef FILENAME_MAX
+# define FILENAME_MAX MAXPATHLEN
+#endif
+
+struct fail_s {
+ struct faillog fs_faillog;
+#ifndef MAIN
+ time_t fs_fail_time;
+#endif /* ndef MAIN */
+};
+
+struct tally_options {
+ const char *filename;
+ tally_t deny;
+ long lock_time;
+ long unlock_time;
+ unsigned int ctrl;
+};
+
+#define PHASE_UNKNOWN 0
+#define PHASE_AUTH 1
+#define PHASE_ACCOUNT 2
+#define PHASE_SESSION 3
+
+#define OPT_MAGIC_ROOT 01
+#define OPT_FAIL_ON_ERROR 02
+#define OPT_DENY_ROOT 04
+#define OPT_PER_USER 010
+#define OPT_NO_LOCK_TIME 020
+#define OPT_NO_RESET 040
+#define OPT_AUDIT 0100
+#define OPT_SILENT 0200
+#define OPT_NOLOGNOTICE 0400
+
+
+/*---------------------------------------------------------------------*/
+
+/* some syslogging */
+
+#ifdef MAIN
+#define pam_syslog tally_log
+static void
+tally_log (const pam_handle_t *pamh UNUSED, int priority UNUSED,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ fprintf(stderr, "%s: ", MODULE_NAME);
+ vfprintf(stderr, fmt, args);
+ fprintf(stderr,"\n");
+ va_end(args);
+}
+
+#define pam_modutil_getpwnam(pamh,user) getpwnam(user)
+
+#endif
+
+/*---------------------------------------------------------------------*/
+
+/* --- Support function: parse arguments --- */
+
+#ifndef MAIN
+
+static void
+log_phase_no_auth(pam_handle_t *pamh, int phase, const char *argv)
+{
+ if ( phase != PHASE_AUTH ) {
+ pam_syslog(pamh, LOG_ERR,
+ "option %s allowed in auth phase only", argv);
+ }
+}
+
+static int
+tally_parse_args(pam_handle_t *pamh, struct tally_options *opts,
+ int phase, int argc, const char **argv)
+{
+ memset(opts, 0, sizeof(*opts));
+ opts->filename = DEFAULT_LOGFILE;
+
+ for ( ; argc-- > 0; ++argv ) {
+ const char *str;
+
+ if ((str = pam_str_skip_prefix(*argv, "file=")) != NULL) {
+ const char *from = str;
+ if ( *from!='/' || strlen(from)>FILENAME_MAX-1 ) {
+ pam_syslog(pamh, LOG_ERR,
+ "filename not /rooted or too long; %s", *argv);
+ return PAM_AUTH_ERR;
+ }
+ opts->filename = from;
+ }
+ else if ( ! strcmp( *argv, "onerr=fail" ) ) {
+ opts->ctrl |= OPT_FAIL_ON_ERROR;
+ }
+ else if ( ! strcmp( *argv, "onerr=succeed" ) ) {
+ opts->ctrl &= ~OPT_FAIL_ON_ERROR;
+ }
+ else if ( ! strcmp( *argv, "magic_root" ) ) {
+ opts->ctrl |= OPT_MAGIC_ROOT;
+ }
+ else if ( ! strcmp( *argv, "even_deny_root_account" ) ) {
+ log_phase_no_auth(pamh, phase, *argv);
+ opts->ctrl |= OPT_DENY_ROOT;
+ }
+ else if ((str = pam_str_skip_prefix(*argv, "deny=")) != NULL) {
+ log_phase_no_auth(pamh, phase, *argv);
+ if (sscanf(str, TALLY_FMT, &opts->deny) != 1) {
+ pam_syslog(pamh, LOG_ERR, "bad number supplied: %s", *argv);
+ return PAM_AUTH_ERR;
+ }
+ }
+ else if ((str = pam_str_skip_prefix(*argv, "lock_time=")) != NULL) {
+ log_phase_no_auth(pamh, phase, *argv);
+ if (sscanf(str, "%ld", &opts->lock_time) != 1) {
+ pam_syslog(pamh, LOG_ERR, "bad number supplied: %s", *argv);
+ return PAM_AUTH_ERR;
+ }
+ }
+ else if ((str = pam_str_skip_prefix(*argv, "unlock_time=")) != NULL) {
+ log_phase_no_auth(pamh, phase, *argv);
+ if (sscanf(str, "%ld", &opts->unlock_time) != 1) {
+ pam_syslog(pamh, LOG_ERR, "bad number supplied: %s", *argv);
+ return PAM_AUTH_ERR;
+ }
+ }
+ else if ( ! strcmp( *argv, "per_user" ) )
+ {
+ log_phase_no_auth(pamh, phase, *argv);
+ opts->ctrl |= OPT_PER_USER;
+ }
+ else if ( ! strcmp( *argv, "no_lock_time") )
+ {
+ log_phase_no_auth(pamh, phase, *argv);
+ opts->ctrl |= OPT_NO_LOCK_TIME;
+ }
+ else if ( ! strcmp( *argv, "no_reset" ) ) {
+ opts->ctrl |= OPT_NO_RESET;
+ }
+ else if ( ! strcmp ( *argv, "audit") ) {
+ opts->ctrl |= OPT_AUDIT;
+ }
+ else if ( ! strcmp ( *argv, "silent") ) {
+ opts->ctrl |= OPT_SILENT;
+ }
+ else if ( ! strcmp ( *argv, "no_log_info") ) {
+ opts->ctrl |= OPT_NOLOGNOTICE;
+ }
+ else {
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+ }
+
+ return PAM_SUCCESS;
+}
+
+#endif /* #ifndef MAIN */
+
+/*---------------------------------------------------------------------*/
+
+/* --- Support function: get uid (and optionally username) from PAM or
+ cline_user --- */
+
+#ifdef MAIN
+static const char *cline_user=0; /* cline_user is used in the administration prog */
+#endif
+
+static int
+pam_get_uid(pam_handle_t *pamh, uid_t *uid, const char **userp, struct tally_options *opts)
+{
+ const char *user = NULL;
+ struct passwd *pw;
+
+#ifdef MAIN
+ user = cline_user;
+
+ if ( !user ) {
+ pam_syslog(pamh, LOG_ERR, "pam_get_uid; user?");
+ return PAM_AUTH_ERR;
+ }
+#else
+ if ((pam_get_user( pamh, &user, NULL )) != PAM_SUCCESS) {
+ pam_syslog(pamh, LOG_NOTICE, "cannot determine user name");
+ return PAM_AUTH_ERR;
+ }
+#endif
+
+ if ( ! ( pw = pam_modutil_getpwnam( pamh, user ) ) ) {
+ opts->ctrl & OPT_AUDIT ?
+ pam_syslog(pamh, LOG_NOTICE, "pam_get_uid; no such user %s", user) :
+ pam_syslog(pamh, LOG_NOTICE, "pam_get_uid; no such user");
+ return PAM_USER_UNKNOWN;
+ }
+
+ if ( uid ) *uid = pw->pw_uid;
+ if ( userp ) *userp = user;
+ return PAM_SUCCESS;
+}
+
+/*---------------------------------------------------------------------*/
+
+/* --- Support functions: set/get tally data --- */
+
+#ifndef MAIN
+
+static void
+_cleanup(pam_handle_t *pamh UNUSED, void *data, int error_status UNUSED)
+{
+ free(data);
+}
+
+
+static void
+tally_set_data( pam_handle_t *pamh, time_t oldtime )
+{
+ time_t *data;
+
+ if ( (data=malloc(sizeof(time_t))) != NULL ) {
+ *data = oldtime;
+ pam_set_data(pamh, MODULE_NAME, (void *)data, _cleanup);
+ }
+}
+
+static int
+tally_get_data( pam_handle_t *pamh, time_t *oldtime )
+{
+ int rv;
+ const void *data;
+
+ rv = pam_get_data(pamh, MODULE_NAME, &data);
+ if ( rv == PAM_SUCCESS && data != NULL && oldtime != NULL ) {
+ *oldtime = *(const time_t *)data;
+ pam_set_data(pamh, MODULE_NAME, NULL, NULL);
+ }
+ else {
+ rv = -1;
+ if (oldtime)
+ *oldtime = 0;
+ }
+ return rv;
+}
+#endif /* #ifndef MAIN */
+
+/*---------------------------------------------------------------------*/
+
+/* --- Support function: open/create tallyfile and return tally for uid --- */
+
+/* If on entry *tally==TALLY_HI, tallyfile is opened READONLY */
+/* Otherwise, if on entry tallyfile doesn't exist, creation is attempted. */
+
+static int
+get_tally(pam_handle_t *pamh, tally_t *tally, uid_t uid,
+ const char *filename, FILE **TALLY, struct fail_s *fsp)
+{
+ struct stat fileinfo;
+ int lstat_ret = lstat(filename,&fileinfo);
+
+ if ( lstat_ret && *tally!=TALLY_HI ) {
+ int oldmask = umask(077);
+ *TALLY=fopen(filename, "a");
+ /* Create file, or append-open in pathological case. */
+ umask(oldmask);
+ if ( !*TALLY ) {
+ pam_syslog(pamh, LOG_ALERT, "Couldn't create %s", filename);
+ return PAM_AUTH_ERR;
+ }
+ lstat_ret = fstat(fileno(*TALLY),&fileinfo);
+ fclose(*TALLY);
+ }
+
+ if ( lstat_ret ) {
+ pam_syslog(pamh, LOG_ALERT, "Couldn't stat %s", filename);
+ return PAM_AUTH_ERR;
+ }
+
+ if((fileinfo.st_mode & S_IWOTH) || !S_ISREG(fileinfo.st_mode)) {
+ /* If the file is world writable or is not a
+ normal file, return error */
+ pam_syslog(pamh, LOG_ALERT,
+ "%s is either world writable or not a normal file",
+ filename);
+ return PAM_AUTH_ERR;
+ }
+
+ if ( ! ( *TALLY = fopen(filename,(*tally!=TALLY_HI)?"r+":"r") ) ) {
+ pam_syslog(pamh, LOG_ALERT, "Error opening %s for %s", filename, *tally!=TALLY_HI?"update":"read");
+
+/* Discovering why account service fails: e/uid are target user.
+ *
+ * perror(MODULE_NAME);
+ * fprintf(stderr,"uid %d euid %d\n",getuid(), geteuid());
+ */
+ return PAM_AUTH_ERR;
+ }
+
+ if ( fseeko( *TALLY, (off_t) uid * sizeof(struct faillog), SEEK_SET ) ) {
+ pam_syslog(pamh, LOG_ALERT, "fseek failed for %s", filename);
+ fclose(*TALLY);
+ return PAM_AUTH_ERR;
+ }
+
+ if ( (size_t)fileinfo.st_size <= uid * sizeof(struct faillog) ) {
+
+ memset(fsp, 0, sizeof(struct faillog));
+ *tally=0;
+ fsp->fs_faillog.fail_time = time(NULL);
+
+ } else if (( fread((char *) &fsp->fs_faillog,
+ sizeof(struct faillog), 1, *TALLY) )==0 ) {
+
+ *tally=0; /* Assuming a gappy filesystem */
+
+ } else {
+
+ *tally = fsp->fs_faillog.fail_cnt;
+
+ }
+
+ return PAM_SUCCESS;
+}
+
+/*---------------------------------------------------------------------*/
+
+/* --- Support function: update and close tallyfile with tally!=TALLY_HI --- */
+
+static int
+set_tally(pam_handle_t *pamh, tally_t tally, uid_t uid,
+ const char *filename, FILE **TALLY, struct fail_s *fsp)
+{
+ int retval = PAM_SUCCESS;
+
+ if ( tally!=TALLY_HI ) {
+ if ( fseeko( *TALLY, (off_t) uid * sizeof(struct faillog), SEEK_SET ) ) {
+ pam_syslog(pamh, LOG_ALERT, "fseek failed for %s", filename);
+ retval = PAM_AUTH_ERR;
+ } else {
+ fsp->fs_faillog.fail_cnt = tally;
+ if (fwrite((char *) &fsp->fs_faillog,
+ sizeof(struct faillog), 1, *TALLY)==0 ) {
+ pam_syslog(pamh, LOG_ALERT, "update (fwrite) failed for %s", filename);
+ retval = PAM_AUTH_ERR;
+ }
+ }
+ }
+
+ if ( fclose(*TALLY) ) {
+ pam_syslog(pamh, LOG_ALERT, "update (fclose) failed for %s", filename);
+ return PAM_AUTH_ERR;
+ }
+ *TALLY=NULL;
+ return retval;
+}
+
+/*---------------------------------------------------------------------*/
+
+/* --- PAM bits --- */
+
+#ifndef MAIN
+
+#define RETURN_ERROR(i) return ((opts->ctrl & OPT_FAIL_ON_ERROR)?(i):(PAM_SUCCESS))
+
+/*---------------------------------------------------------------------*/
+
+/* --- tally bump function: bump tally for uid by (signed) inc --- */
+
+static int
+tally_bump (int inc, time_t *oldtime, pam_handle_t *pamh,
+ uid_t uid, const char *user, struct tally_options *opts)
+{
+ tally_t
+ tally = 0; /* !TALLY_HI --> Log opened for update */
+
+ FILE
+ *TALLY = NULL;
+ const void
+ *remote_host = NULL,
+ *cur_tty = NULL;
+ struct fail_s fs, *fsp = &fs;
+ int i;
+
+ i=get_tally(pamh, &tally, uid, opts->filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) { RETURN_ERROR( i ); }
+
+ /* to remember old fail time (for locktime) */
+ fsp->fs_fail_time = fsp->fs_faillog.fail_time;
+ if ( inc > 0 ) {
+ if ( oldtime ) {
+ *oldtime = fsp->fs_faillog.fail_time;
+ }
+ fsp->fs_faillog.fail_time = time(NULL);
+ } else {
+ if ( oldtime ) {
+ fsp->fs_faillog.fail_time = *oldtime;
+ }
+ }
+ (void) pam_get_item(pamh, PAM_RHOST, &remote_host);
+ if (!remote_host) {
+
+ (void) pam_get_item(pamh, PAM_TTY, &cur_tty);
+ if (!cur_tty) {
+ strncpy(fsp->fs_faillog.fail_line, "unknown",
+ sizeof(fsp->fs_faillog.fail_line) - 1);
+ fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
+ } else {
+ strncpy(fsp->fs_faillog.fail_line, cur_tty,
+ sizeof(fsp->fs_faillog.fail_line)-1);
+ fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
+ }
+
+ } else {
+ strncpy(fsp->fs_faillog.fail_line, remote_host,
+ (size_t)sizeof(fsp->fs_faillog.fail_line));
+ fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
+ }
+
+ if ( !(opts->ctrl & OPT_MAGIC_ROOT) || getuid() ) { /* magic_root doesn't change tally */
+
+ tally+=inc;
+
+ if ( tally==TALLY_HI ) { /* Overflow *and* underflow. :) */
+ tally-=inc;
+ pam_syslog(pamh, LOG_ALERT, "Tally %sflowed for user %s",
+ (inc<0)?"under":"over",user);
+ }
+ }
+
+ i=set_tally(pamh, tally, uid, opts->filename, &TALLY, fsp );
+ if ( i != PAM_SUCCESS ) { RETURN_ERROR( i ); }
+
+ return PAM_SUCCESS;
+}
+
+static int
+tally_check (time_t oldtime, pam_handle_t *pamh, uid_t uid,
+ const char *user, struct tally_options *opts)
+{
+ tally_t
+ deny = opts->deny;
+ tally_t
+ tally = TALLY_HI;
+ long
+ lock_time = opts->lock_time;
+
+ struct fail_s fs, *fsp = &fs;
+ FILE *TALLY=0;
+ int i;
+
+ i=get_tally(pamh, &tally, uid, opts->filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) { RETURN_ERROR( i ); }
+
+ if ( TALLY != NULL ) {
+ fclose(TALLY);
+ }
+
+ if ( !(opts->ctrl & OPT_MAGIC_ROOT) || getuid() ) { /* magic_root skips tally check */
+
+ /* To deny or not to deny; that is the question */
+
+ /* if there's .fail_max entry and per_user=TRUE then deny=.fail_max */
+
+ if ( (fsp->fs_faillog.fail_max) && (opts->ctrl & OPT_PER_USER) ) {
+ deny = fsp->fs_faillog.fail_max;
+ }
+ if ( (fsp->fs_faillog.fail_locktime) && (opts->ctrl & OPT_PER_USER) ) {
+ lock_time = fsp->fs_faillog.fail_locktime;
+ }
+ if (lock_time && oldtime
+ && !(opts->ctrl & OPT_NO_LOCK_TIME) )
+ {
+ if ( lock_time + oldtime > time(NULL) )
+ {
+ if (!(opts->ctrl & OPT_SILENT))
+ pam_info (pamh,
+ _("The account is temporarily locked (%ld seconds left)."),
+ (long int) (oldtime+lock_time-time(NULL)));
+
+ if (!(opts->ctrl & OPT_NOLOGNOTICE))
+ pam_syslog (pamh, LOG_NOTICE,
+ "user %s (%lu) has time limit [%lds left]"
+ " since last failure.",
+ user, (unsigned long int) uid,
+ (long int) (oldtime+lock_time-time(NULL)));
+ return PAM_AUTH_ERR;
+ }
+ }
+ if (opts->unlock_time && oldtime)
+ {
+ if ( opts->unlock_time + oldtime <= time(NULL) )
+ { /* ignore deny check after unlock_time elapsed */
+ return PAM_SUCCESS;
+ }
+ }
+ if (
+ ( deny != 0 ) && /* deny==0 means no deny */
+ ( tally > deny ) && /* tally>deny means exceeded */
+ ( ((opts->ctrl & OPT_DENY_ROOT) || uid) ) /* even_deny stops uid check */
+ ) {
+ if (!(opts->ctrl & OPT_SILENT))
+ pam_info (pamh, _("The account is locked due to %u failed logins."),
+ (unsigned int)tally);
+
+ if (!(opts->ctrl & OPT_NOLOGNOTICE))
+ pam_syslog(pamh, LOG_NOTICE,
+ "user %s (%lu) tally "TALLY_FMT", deny "TALLY_FMT,
+ user, (unsigned long int) uid, tally, deny);
+ return PAM_AUTH_ERR; /* Only unconditional failure */
+ }
+ }
+
+ return PAM_SUCCESS;
+}
+
+static int
+tally_reset (pam_handle_t *pamh, uid_t uid, struct tally_options *opts)
+{
+ tally_t
+ tally = 0; /* !TALLY_HI --> Log opened for update */
+
+ struct fail_s fs, *fsp = &fs;
+ FILE *TALLY=0;
+ int i;
+
+ i=get_tally(pamh, &tally, uid, opts->filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) { RETURN_ERROR( i ); }
+
+ /* resets if not magic root
+ */
+
+ if ( (!(opts->ctrl & OPT_MAGIC_ROOT) || getuid())
+ && !(opts->ctrl & OPT_NO_RESET) )
+ { tally=0; }
+
+ if (tally == 0)
+ {
+ fsp->fs_faillog.fail_time = (time_t) 0;
+ strcpy(fsp->fs_faillog.fail_line, "");
+ }
+
+ i=set_tally(pamh, tally, uid, opts->filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) { RETURN_ERROR( i ); }
+
+ return PAM_SUCCESS;
+}
+
+/*---------------------------------------------------------------------*/
+
+/* --- authentication management functions (only) --- */
+
+int
+pam_sm_authenticate(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int
+ rvcheck, rvbump;
+ time_t
+ oldtime = 0;
+ struct tally_options
+ options, *opts = &options;
+ uid_t
+ uid;
+ const char
+ *user;
+
+ rvcheck = tally_parse_args(pamh, opts, PHASE_AUTH, argc, argv);
+ if ( rvcheck != PAM_SUCCESS )
+ RETURN_ERROR( rvcheck );
+
+ if (flags & PAM_SILENT)
+ opts->ctrl |= OPT_SILENT;
+
+ rvcheck = pam_get_uid(pamh, &uid, &user, opts);
+ if ( rvcheck != PAM_SUCCESS )
+ RETURN_ERROR( rvcheck );
+
+ rvbump = tally_bump(1, &oldtime, pamh, uid, user, opts);
+ rvcheck = tally_check(oldtime, pamh, uid, user, opts);
+
+ tally_set_data(pamh, oldtime);
+
+ return rvcheck != PAM_SUCCESS ? rvcheck : rvbump;
+}
+
+int
+pam_sm_setcred(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int
+ rv;
+ time_t
+ oldtime = 0;
+ struct tally_options
+ options, *opts = &options;
+ uid_t
+ uid;
+ const char
+ *user;
+
+ rv = tally_parse_args(pamh, opts, PHASE_AUTH, argc, argv);
+ if ( rv != PAM_SUCCESS )
+ RETURN_ERROR( rv );
+
+ if (flags & PAM_SILENT)
+ opts->ctrl |= OPT_SILENT;
+
+ rv = pam_get_uid(pamh, &uid, &user, opts);
+ if ( rv != PAM_SUCCESS )
+ RETURN_ERROR( rv );
+
+ if ( tally_get_data(pamh, &oldtime) != 0 )
+ /* no data found */
+ return PAM_SUCCESS;
+
+ if ( (rv=tally_bump(-1, &oldtime, pamh, uid, user, opts)) != PAM_SUCCESS )
+ return rv;
+ return tally_reset(pamh, uid, opts);
+}
+
+/*---------------------------------------------------------------------*/
+
+/* --- authentication management functions (only) --- */
+
+/* To reset failcount of user on successful login */
+
+int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int
+ rv;
+ time_t
+ oldtime = 0;
+ struct tally_options
+ options, *opts = &options;
+ uid_t
+ uid;
+ const char
+ *user;
+
+ rv = tally_parse_args(pamh, opts, PHASE_ACCOUNT, argc, argv);
+ if ( rv != PAM_SUCCESS )
+ RETURN_ERROR( rv );
+
+ if (flags & PAM_SILENT)
+ opts->ctrl |= OPT_SILENT;
+
+ rv = pam_get_uid(pamh, &uid, &user, opts);
+ if ( rv != PAM_SUCCESS )
+ RETURN_ERROR( rv );
+
+ if ( tally_get_data(pamh, &oldtime) != 0 )
+ /* no data found */
+ return PAM_SUCCESS;
+
+ if ( (rv=tally_bump(-1, &oldtime, pamh, uid, user, opts)) != PAM_SUCCESS )
+ return rv;
+ return tally_reset(pamh, uid, opts);
+}
+
+/*-----------------------------------------------------------------------*/
+
+#else /* #ifndef MAIN */
+
+static const char *cline_filename = DEFAULT_LOGFILE;
+static tally_t cline_reset = TALLY_HI; /* Default is `interrogate only' */
+static int cline_quiet = 0;
+
+/*
+ * Not going to link with pamlib just for these.. :)
+ */
+
+static const char *
+pam_errors( int i )
+{
+ switch (i) {
+ case PAM_AUTH_ERR: return _("Authentication error");
+ case PAM_SERVICE_ERR: return _("Service error");
+ case PAM_USER_UNKNOWN: return _("Unknown user");
+ default: return _("Unknown error");
+ }
+}
+
+static int
+getopts( char **argv )
+{
+ const char *pname = *argv;
+ for ( ; *argv ; (void)(*argv && ++argv) ) {
+ const char *str;
+ if ( !strcmp (*argv,"--file") ) cline_filename=*++argv;
+ else if ((str = pam_str_skip_prefix(*argv, "--file=")) != NULL)
+ cline_filename = str;
+ else if ( !strcmp (*argv,"--user") ) cline_user=*++argv;
+ else if ((str = pam_str_skip_prefix(*argv, "--user=")) != NULL)
+ cline_user = str;
+ else if ( !strcmp (*argv,"--reset") ) cline_reset=0;
+ else if ((str = pam_str_skip_prefix(*argv, "--reset=")) != NULL) {
+ if (sscanf(str, TALLY_FMT, &cline_reset) != 1 )
+ fprintf(stderr,_("%s: Bad number given to --reset=\n"),pname), exit(0);
+ }
+ else if ( !strcmp (*argv,"--quiet") ) cline_quiet=1;
+ else {
+ fprintf(stderr,_("%s: Unrecognised option %s\n"),pname,*argv);
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+int main ( int argc UNUSED, char **argv )
+{
+ struct fail_s fs, *fsp = &fs;
+
+ if ( ! getopts( argv+1 ) ) {
+ printf(_("%s: [--file rooted-filename] [--user username] "
+ "[--reset[=n]] [--quiet]\n"),
+ *argv);
+ exit(0);
+ }
+
+ umask(077);
+
+ /*
+ * Major difference between individual user and all users:
+ * --user just handles one user, just like PAM.
+ * --user=* handles all users, sniffing cline_filename for nonzeros
+ */
+
+ if ( cline_user ) {
+ uid_t uid;
+ tally_t tally=cline_reset;
+ FILE *TALLY=0;
+ struct tally_options opts;
+ int i;
+
+ memset(&opts, 0, sizeof(opts));
+ opts.ctrl = OPT_AUDIT;
+ i=pam_get_uid(NULL, &uid, NULL, &opts);
+ if ( i != PAM_SUCCESS ) {
+ fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
+ exit(0);
+ }
+
+ i=get_tally(NULL, &tally, uid, cline_filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) {
+ fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
+ exit(0);
+ }
+
+ if ( !cline_quiet )
+ printf("User %s\t(%lu)\t%s "TALLY_FMT"\n",cline_user,
+ (unsigned long int) uid,
+ (cline_reset!=TALLY_HI)?"had":"has",tally);
+
+ i=set_tally(NULL, cline_reset, uid, cline_filename, &TALLY, fsp);
+ if ( i != PAM_SUCCESS ) {
+ fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
+ exit(0);
+ }
+ }
+ else /* !cline_user (ie, operate on all users) */ {
+ FILE *TALLY=fopen(cline_filename, "r");
+ uid_t uid=0;
+ if ( !TALLY ) perror(*argv), exit(0);
+
+ for ( ; !feof(TALLY); uid++ ) {
+ tally_t tally;
+ struct passwd *pw;
+ if ( ! fread((char *) &fsp->fs_faillog,
+ sizeof (struct faillog), 1, TALLY)
+ || ! fsp->fs_faillog.fail_cnt ) {
+ continue;
+ }
+ tally = fsp->fs_faillog.fail_cnt;
+
+ if ( ( pw=getpwuid(uid) ) ) {
+ printf("User %s\t(%lu)\t%s "TALLY_FMT"\n",pw->pw_name,
+ (unsigned long int) uid,
+ (cline_reset!=TALLY_HI)?"had":"has",tally);
+ }
+ else {
+ printf("User [NONAME]\t(%lu)\t%s "TALLY_FMT"\n",
+ (unsigned long int) uid,
+ (cline_reset!=TALLY_HI)?"had":"has",tally);
+ }
+ }
+ fclose(TALLY);
+ if ( cline_reset!=0 && cline_reset!=TALLY_HI ) {
+ fprintf(stderr,_("%s: Can't reset all users to non-zero\n"),*argv);
+ }
+ else if ( !cline_reset ) {
+ TALLY=fopen(cline_filename, "w");
+ if ( !TALLY ) perror(*argv), exit(0);
+ fclose(TALLY);
+ }
+ }
+ return 0;
+}
+
+
+#endif /* #ifndef MAIN */
diff --git a/modules/pam_tally/pam_tally_app.c b/modules/pam_tally/pam_tally_app.c
new file mode 100644
index 0000000..ad28854
--- /dev/null
+++ b/modules/pam_tally/pam_tally_app.c
@@ -0,0 +1,6 @@
+/*
+ # This seemed like such a good idea at the time. :)
+ */
+
+#define MAIN
+#include "pam_tally.c"
diff --git a/modules/pam_tally/tst-pam_tally b/modules/pam_tally/tst-pam_tally
new file mode 100755
index 0000000..15291af
--- /dev/null
+++ b/modules/pam_tally/tst-pam_tally
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_tally.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 08:48:33 +0000