diff options
Diffstat (limited to 'modules/pam_echo')
| -rw-r--r-- | modules/pam_echo/Makefile.am | 31 | ||||
| -rw-r--r-- | modules/pam_echo/Makefile.in | 667 | ||||
| -rw-r--r-- | modules/pam_echo/README | 50 | ||||
| -rw-r--r-- | modules/pam_echo/README.xml | 36 | ||||
| -rw-r--r-- | modules/pam_echo/pam_echo.8 | 108 | ||||
| -rw-r--r-- | modules/pam_echo/pam_echo.8.xml | 168 | ||||
| -rw-r--r-- | modules/pam_echo/pam_echo.c | 269 | ||||
| -rwxr-xr-x | modules/pam_echo/tst-pam_echo | 2 |
8 files changed, 1331 insertions, 0 deletions
diff --git a/modules/pam_echo/Makefile.am b/modules/pam_echo/Makefile.am new file mode 100644 index 00000000..d004e8f4 --- /dev/null +++ b/modules/pam_echo/Makefile.am @@ -0,0 +1,31 @@ +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@thkukuk.de> +# + +CLEANFILES = *~ + +EXTRA_DIST = README $(MANS) $(XMLS) tst-pam_echo + +man_MANS = pam_echo.8 + +XMLS = README.xml pam_echo.8.xml + +securelibdir = $(SECUREDIR) +secureconfdir = $(SCONFIGDIR) + +AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include +AM_LDFLAGS = -no-undefined -avoid-version -module +if HAVE_VERSIONING + AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map +endif + +securelib_LTLIBRARIES = pam_echo.la +pam_echo_la_LIBADD = -L$(top_builddir)/libpam -lpam + +if ENABLE_REGENERATE_MAN +noinst_DATA = README +README: pam_echo.8.xml +-include $(top_srcdir)/Make.xml.rules +endif + +TESTS = tst-pam_echo diff --git a/modules/pam_echo/Makefile.in b/modules/pam_echo/Makefile.in new file mode 100644 index 00000000..9e03f2a5 --- /dev/null +++ b/modules/pam_echo/Makefile.in @@ -0,0 +1,667 @@ +# Makefile.in generated by automake 1.10.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008 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@ + +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@thkukuk.de> +# + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +am__cd = 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mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags uninstall uninstall-am uninstall-man uninstall-man8 \ + uninstall-securelibLTLIBRARIES + +@ENABLE_REGENERATE_MAN_TRUE@README: pam_echo.8.xml +@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/modules/pam_echo/README b/modules/pam_echo/README new file mode 100644 index 00000000..fca26b77 --- /dev/null +++ b/modules/pam_echo/README @@ -0,0 +1,50 @@ +pam_echo — PAM module for printing text messages + +━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ + +DESCRIPTION + +The pam_echo PAM module is for printing text messages to inform user about +special things. Sequences starting with the % character are interpreted in the +following way: + +%H + + The name of the remote host (PAM_RHOST). + +%h + + The name of the local host. + +%s + + The service name (PAM_SERVICE). + +%t + + The name of the controlling terminal (PAM_TTY). + +%U + + The remote user name (PAM_RUSER). + +%u + + The local user name (PAM_USER). + +All other sequences beginning with % expands to the characters following the % +character. + +EXAMPLES + +For an example of the use of this module, we show how it may be used to print +informations about good passwords: + +password optional pam_echo.so file=/usr/share/doc/good-password.txt +password required pam_unix.so + + +AUTHOR + +Thorsten Kukuk <kukuk@thkukuk.de> + diff --git a/modules/pam_echo/README.xml b/modules/pam_echo/README.xml new file mode 100644 index 00000000..b1556e38 --- /dev/null +++ b/modules/pam_echo/README.xml @@ -0,0 +1,36 @@ +<?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_echo.8.xml"> +--> +]> + +<article> + + <articleinfo> + + <title> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_echo.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_echo-name"]/*)'/> + </title> + + </articleinfo> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_echo.8.xml" xpointer='xpointer(//refsect1[@id = "pam_echo-description"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_echo.8.xml" xpointer='xpointer(//refsect1[@id = "pam_echo-examples"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_echo.8.xml" xpointer='xpointer(//refsect1[@id = "pam_echo-author"]/*)'/> + </section> + +</article> diff --git a/modules/pam_echo/pam_echo.8 b/modules/pam_echo/pam_echo.8 new file mode 100644 index 00000000..3e50afb5 --- /dev/null +++ b/modules/pam_echo/pam_echo.8 @@ -0,0 +1,108 @@ +.\" Title: pam_echo +.\" Author: +.\" Generator: DocBook XSL Stylesheets v1.73.1 <http://docbook.sf.net/> +.\" Date: 04/16/2008 +.\" Manual: Linux-PAM Manual +.\" Source: Linux-PAM Manual +.\" +.TH "PAM_ECHO" "8" "04/16/2008" "Linux-PAM Manual" "Linux-PAM Manual" +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.SH "NAME" +pam_echo - PAM module for printing text messages +.SH "SYNOPSIS" +.HP 12 +\fBpam_echo\.so\fR [file=\fI/path/message\fR] +.SH "DESCRIPTION" +.PP +The +\fIpam_echo\fR +PAM module is for printing text messages to inform user about special things\. Sequences starting with the +\fI%\fR +character are interpreted in the following way: +.PP +\fI%H\fR +.RS 4 +The name of the remote host (PAM_RHOST)\. +.RE +.PP +\fB%h\fR +.RS 4 +The name of the local host\. +.RE +.PP +\fI%s\fR +.RS 4 +The service name (PAM_SERVICE)\. +.RE +.PP +\fI%t\fR +.RS 4 +The name of the controlling terminal (PAM_TTY)\. +.RE +.PP +\fI%U\fR +.RS 4 +The remote user name (PAM_RUSER)\. +.RE +.PP +\fI%u\fR +.RS 4 +The local user name (PAM_USER)\. +.RE +.PP +All other sequences beginning with +\fI%\fR +expands to the characters following the +\fI%\fR +character\. +.SH "OPTIONS" +.PP +\fBfile=\fR\fB\fI/path/message\fR\fR +.RS 4 +The content of the file +\fI/path/message\fR +will be printed with the PAM conversion function as PAM_TEXT_INFO\. +.RE +.SH "MODULE SERVICES PROVIDED" +.PP +All services are supported\. +.SH "RETURN VALUES" +.PP +PAM_BUF_ERR +.RS 4 +Memory buffer error\. +.RE +.PP +PAM_SUCCESS +.RS 4 +Message was successful printed\. +.RE +.PP +PAM_IGNORE +.RS 4 +PAM_SILENT flag was given or message file does not exist, no message printed\. +.RE +.SH "EXAMPLES" +.PP +For an example of the use of this module, we show how it may be used to print informations about good passwords: +.sp +.RS 4 +.nf +password optional pam_echo\.so file=/usr/share/doc/good\-password\.txt +password required pam_unix\.so + +.fi +.RE +.sp +.SH "SEE ALSO" +.PP + +\fBpam.conf\fR(8), +\fBpam.d\fR(8), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +Thorsten Kukuk <kukuk@thkukuk\.de> diff --git a/modules/pam_echo/pam_echo.8.xml b/modules/pam_echo/pam_echo.8.xml new file mode 100644 index 00000000..4a495195 --- /dev/null +++ b/modules/pam_echo/pam_echo.8.xml @@ -0,0 +1,168 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" + "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> + +<refentry id='pam_echo'> + <refmeta> + <refentrytitle>pam_echo</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo> + </refmeta> + + <refnamediv id='pam_echo-name'> + <refname>pam_echo</refname> + <refpurpose>PAM module for printing text messages</refpurpose> + </refnamediv> + +<!-- body begins here --> + + <refsynopsisdiv> + <cmdsynopsis id="pam_echo-cmdsynopsis"> + <command>pam_echo.so</command> + <arg choice="opt"> + file=<replaceable>/path/message</replaceable> + </arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1 id='pam_echo-description'> + <title>DESCRIPTION</title> + <para> + The <emphasis>pam_echo</emphasis> PAM module is for printing + text messages to inform user about special things. Sequences + starting with the <emphasis>%</emphasis> character are + interpreted in the following way: + </para> + <variablelist> + <varlistentry> + <term><emphasis>%H</emphasis></term> + <listitem> + <para>The name of the remote host (PAM_RHOST).</para> + </listitem> + </varlistentry> + <varlistentry> + <term><emphasis remap='B'>%h</emphasis></term> + <listitem> + <para>The name of the local host.</para> + </listitem> + </varlistentry> + <varlistentry> + <term><emphasis>%s</emphasis></term> + <listitem> + <para>The service name (PAM_SERVICE).</para> + </listitem> + </varlistentry> + <varlistentry> + <term><emphasis>%t</emphasis></term> + <listitem> + <para>The name of the controlling terminal (PAM_TTY).</para> + </listitem> + </varlistentry> + <varlistentry> + <term><emphasis>%U</emphasis></term> + <listitem> + <para>The remote user name (PAM_RUSER).</para> + </listitem> + </varlistentry> + <varlistentry> + <term><emphasis>%u</emphasis></term> + <listitem> + <para>The local user name (PAM_USER).</para> + </listitem> + </varlistentry> + </variablelist> + + <para> + All other sequences beginning with <emphasis>%</emphasis> + expands to the characters following the <emphasis>%</emphasis> + character. + </para> + </refsect1> + + <refsect1 id='pam_echo-options'> + <title>OPTIONS</title> + <variablelist> + <varlistentry> + <term> + <option>file=<replaceable>/path/message</replaceable></option> + </term> + <listitem> + <para> + The content of the file <filename>/path/message</filename> + will be printed with the PAM conversion function as PAM_TEXT_INFO. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id="pam_echo-services"> + <title>MODULE SERVICES PROVIDED</title> + <para> + All services are supported. + </para> + </refsect1> + + + <refsect1 id="pam_echo-return_values"> + <title>RETURN VALUES</title> + <variablelist> + <varlistentry> + <term>PAM_BUF_ERR</term> + <listitem> + <para> + Memory buffer error. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_SUCCESS</term> + <listitem> + <para> + Message was successful printed. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_IGNORE</term> + <listitem> + <para> + PAM_SILENT flag was given or message file does not + exist, no message printed. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id='pam_echo-examples'> + <title>EXAMPLES</title> + <para> + For an example of the use of this module, we show how it may be + used to print informations about good passwords: + <programlisting> +password optional pam_echo.so file=/usr/share/doc/good-password.txt +password required pam_unix.so + </programlisting> + </para> + </refsect1> + + + <refsect1 id='pam_echo-see_also'><title>SEE ALSO</title> + <para> + <citerefentry> + <refentrytitle>pam.conf</refentrytitle><manvolnum>8</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam.d</refentrytitle><manvolnum>8</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum> + </citerefentry></para> + </refsect1> + + <refsect1 id='pam_echo-author'> + <title>AUTHOR</title> + <para>Thorsten Kukuk <kukuk@thkukuk.de></para> + </refsect1> +</refentry> diff --git a/modules/pam_echo/pam_echo.c b/modules/pam_echo/pam_echo.c new file mode 100644 index 00000000..31ebca22 --- /dev/null +++ b/modules/pam_echo/pam_echo.c @@ -0,0 +1,269 @@ +/* + * Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de> + * + * 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. + */ + +#if defined(HAVE_CONFIG_H) +#include "config.h" +#endif + +#include <errno.h> +#include <stdio.h> +#include <fcntl.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> +#include <limits.h> +#include <syslog.h> +#include <sys/types.h> +#include <sys/stat.h> + +#ifndef HOST_NAME_MAX +#define HOST_NAME_MAX 255 +#endif + +#define PAM_SM_ACCOUNT +#define PAM_SM_AUTH +#define PAM_SM_PASSWORD +#define PAM_SM_SESSION + +#include <security/pam_modules.h> +#include <security/pam_modutil.h> +#include <security/_pam_macros.h> +#include <security/pam_ext.h> + +static int +replace_and_print (pam_handle_t *pamh, const char *mesg) +{ + char *output; + size_t length = strlen (mesg) + PAM_MAX_MSG_SIZE; + char myhostname[HOST_NAME_MAX+1]; + const void *str = NULL; + const char *p, *q; + int item; + size_t len; + + output = malloc (length); + if (output == NULL) + { + pam_syslog (pamh, LOG_ERR, "running out of memory"); + return PAM_BUF_ERR; + } + + for (p = mesg, len = 0; *p != '\0' && len < length - 1; ++p) + { + if (*p != '%' || p[1] == '\0') + { + output[len++] = *p; + continue; + } + switch (*++p) + { + case 'H': + item = PAM_RHOST; + break; + case 'h': + item = -2; /* aka PAM_LOCALHOST */ + break; + case 's': + item = PAM_SERVICE; + break; + case 't': + item = PAM_TTY; + break; + case 'U': + item = PAM_RUSER; + break; + case 'u': + item = PAM_USER; + break; + default: + output[len++] = *p; + continue; + } + if (item == -2) + { + if (gethostname (myhostname, sizeof (myhostname)) == -1) + str = NULL; + else + str = &myhostname; + } + else + pam_get_item (pamh, item, &str); + if (str == NULL) + str = "(null)"; + for (q = str; *q != '\0' && len < length - 1; ++q) + output[len++] = *q; + } + output[len] = '\0'; + + pam_info (pamh, "%s", output); + free (output); + + return PAM_SUCCESS; +} + +static int +pam_echo (pam_handle_t *pamh, int flags, int argc, const char **argv) +{ + int fd; + int orig_argc = argc; + const char **orig_argv = argv; + const char *file = NULL; + int retval; + + if (flags & PAM_SILENT) + return PAM_IGNORE; + + for (; argc-- > 0; ++argv) + { + if (!strncmp (*argv, "file=", 5)) + file = (5 + *argv); + } + + /* No file= option, use argument for output. */ + if (file == NULL || file[0] == '\0') + { + char msg[PAM_MAX_MSG_SIZE]; + const char *p; + int i; + size_t len; + + for (i = 0, len = 0; i < orig_argc && len < sizeof (msg) - 1; ++i) + { + if (i > 0) + msg[len++] = ' '; + for (p = orig_argv[i]; *p != '\0' && len < sizeof(msg) - 1; ++p) + msg[len++] = *p; + } + msg[len] = '\0'; + + retval = replace_and_print (pamh, msg); + } + else if ((fd = open (file, O_RDONLY, 0)) >= 0) + { + char *mtmp = NULL; + struct stat st; + + /* load file into message buffer. */ + if ((fstat (fd, &st) < 0) || !st.st_size) + return PAM_IGNORE; + + mtmp = malloc (st.st_size + 1); + if (!mtmp) + return PAM_BUF_ERR; + + if (pam_modutil_read (fd, mtmp, st.st_size) == -1) + { + pam_syslog (pamh, LOG_ERR, "Error while reading %s: %m", file); + free (mtmp); + return PAM_IGNORE; + } + + if (mtmp[st.st_size - 1] == '\n') + mtmp[st.st_size - 1] = '\0'; + else + mtmp[st.st_size] = '\0'; + + close (fd); + retval = replace_and_print (pamh, mtmp); + free (mtmp); + } + else + { + pam_syslog (pamh, LOG_ERR, "Cannot open %s: %m", file); + retval = PAM_IGNORE; + } + return retval; +} + +int +pam_sm_authenticate (pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + return pam_echo (pamh, flags, argc, argv); +} + +int +pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) +{ + return PAM_IGNORE; +} + +int +pam_sm_acct_mgmt (pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + return pam_echo (pamh, flags, argc, argv); +} + +int +pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + return pam_echo (pamh, flags, argc, argv); +} + +int +pam_sm_close_session (pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) +{ + return PAM_IGNORE; +} + +int +pam_sm_chauthtok (pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + if (flags & PAM_PRELIM_CHECK) + return pam_echo (pamh, flags, argc, argv); + else + return PAM_IGNORE; +} + +#ifdef PAM_STATIC + +/* static module data */ + +struct pam_module _pam_echo_modstruct = { + "pam_echo", + pam_sm_authenticate, + pam_sm_setcred, + pam_sm_acct_mgmt, + pam_sm_open_session, + pam_sm_close_session, + pam_sm_chauthtok, +}; + +#endif diff --git a/modules/pam_echo/tst-pam_echo b/modules/pam_echo/tst-pam_echo new file mode 100755 index 00000000..483a2c23 --- /dev/null +++ b/modules/pam_echo/tst-pam_echo @@ -0,0 +1,2 @@ +#!/bin/sh +../../tests/tst-dlopen .libs/pam_echo.so |