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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:22:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:22:51 +0000
commit9ada0093e92388590c7368600ca4e9e3e376f0d0 (patch)
treea56fe41110023676d7082028cbaa47ca4b6e6164 /modules/pam_echo
parentInitial commit. (diff)
downloadpam-9ada0093e92388590c7368600ca4e9e3e376f0d0.tar.xz
pam-9ada0093e92388590c7368600ca4e9e3e376f0d0.zip
Adding upstream version 1.5.2.upstream/1.5.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--modules/pam_echo/Makefile.am36
-rw-r--r--modules/pam_echo/Makefile.in1180
-rw-r--r--modules/pam_echo/README50
-rw-r--r--modules/pam_echo/README.xml36
-rw-r--r--modules/pam_echo/pam_echo.8132
-rw-r--r--modules/pam_echo/pam_echo.8.xml170
-rw-r--r--modules/pam_echo/pam_echo.c260
-rwxr-xr-xmodules/pam_echo/tst-pam_echo2
-rw-r--r--modules/pam_echo/tst-pam_echo-retval.c101
9 files changed, 1967 insertions, 0 deletions
diff --git a/modules/pam_echo/Makefile.am b/modules/pam_echo/Makefile.am
new file mode 100644
index 0000000..b855e62
--- /dev/null
+++ b/modules/pam_echo/Makefile.am
@@ -0,0 +1,36 @@
+#
+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@thkukuk.de>
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = $(XMLS)
+
+if HAVE_DOC
+dist_man_MANS = pam_echo.8
+endif
+XMLS = README.xml pam_echo.8.xml
+dist_check_SCRIPTS = tst-pam_echo
+TESTS = $(dist_check_SCRIPTS) $(check_PROGRAMS)
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ $(WARN_CFLAGS)
+AM_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+ AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+securelib_LTLIBRARIES = pam_echo.la
+pam_echo_la_LIBADD = $(top_builddir)/libpam/libpam.la
+
+check_PROGRAMS = tst-pam_echo-retval
+tst_pam_echo_retval_LDADD = $(top_builddir)/libpam/libpam.la
+
+if ENABLE_REGENERATE_MAN
+dist_noinst_DATA = README
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_echo/Makefile.in b/modules/pam_echo/Makefile.in
new file mode 100644
index 0000000..7b591fa
--- /dev/null
+++ b/modules/pam_echo/Makefile.in
@@ -0,0 +1,1180 @@
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+
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+ $(am__set_b); \
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+distdir: $(BUILT_SOURCES)
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+ @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
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+ dist_files=`for file in $$list; do echo $$file; done | \
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+ -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+ case $$dist_files in \
+ */*) $(MKDIR_P) `echo "$$dist_files" | \
+ sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
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+ for file in $$dist_files; do \
+ if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
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+ dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
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+ find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+ cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
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+ test -f "$(distdir)/$$file" \
+ || cp -p $$d/$$file "$(distdir)/$$file" \
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+ fi; \
+ done
+check-am: all-am
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+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
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+ fi
+mostlyclean-generic:
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+ -test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
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+clean-generic:
+ -test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
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+maintainer-clean-generic:
+ @echo "This command is intended for maintainers to use"
+ @echo "it deletes files that may require special tools to rebuild."
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+clean: clean-am
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+clean-am: clean-checkPROGRAMS clean-generic clean-libtool \
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+distclean: distclean-am
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diff --git a/modules/pam_echo/README b/modules/pam_echo/README
new file mode 100644
index 0000000..626b34a
--- /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
+information 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 0000000..b1556e3
--- /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 0000000..ba46e06
--- /dev/null
+++ b/modules/pam_echo/pam_echo.8
@@ -0,0 +1,132 @@
+'\" t
+.\" Title: pam_echo
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
+.\" Date: 09/03/2021
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_ECHO" "8" "09/03/2021" "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_echo \- PAM module for printing text messages
+.SH "SYNOPSIS"
+.HP \w'\fBpam_echo\&.so\fR\ 'u
+\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
+\fI%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
+/path/message
+will be printed with the PAM conversion function as PAM_TEXT_INFO\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+All module types (\fBauth\fR,
+\fBaccount\fR,
+\fBpassword\fR
+and
+\fBsession\fR) are provided\&.
+.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 information about good passwords:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+password optional pam_echo\&.so file=/usr/share/doc/good\-password\&.txt
+password required pam_unix\&.so
+
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+.SH "SEE ALSO"
+.PP
+\fBpam.conf\fR(8),
+\fBpam.d\fR(5),
+\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 0000000..ef76b02
--- /dev/null
+++ b/modules/pam_echo/pam_echo.8.xml
@@ -0,0 +1,170 @@
+<?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>%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-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ All module types (<option>auth</option>, <option>account</option>,
+ <option>password</option> and <option>session</option>) are provided.
+
+ </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 information 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>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry></para>
+ </refsect1>
+
+ <refsect1 id='pam_echo-author'>
+ <title>AUTHOR</title>
+ <para>Thorsten Kukuk &lt;kukuk@thkukuk.de&gt;</para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_echo/pam_echo.c b/modules/pam_echo/pam_echo.c
new file mode 100644
index 0000000..181aeb4
--- /dev/null
+++ b/modules/pam_echo/pam_echo.c
@@ -0,0 +1,260 @@
+/*
+ * 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
+
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+#include <security/_pam_macros.h>
+#include <security/pam_ext.h>
+#include "pam_inline.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_CRIT, "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
+ {
+ if (pam_get_item (pamh, item, &str) != PAM_SUCCESS)
+ str = NULL;
+ }
+ 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)
+ {
+ const char *str = pam_str_skip_prefix(*argv, "file=");
+ if (str != NULL)
+ file = str;
+ }
+
+ /* 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)
+ {
+ close (fd);
+ return PAM_IGNORE;
+ }
+
+ mtmp = malloc (st.st_size + 1);
+ if (!mtmp)
+ {
+ close (fd);
+ 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);
+ close (fd);
+ 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;
+}
diff --git a/modules/pam_echo/tst-pam_echo b/modules/pam_echo/tst-pam_echo
new file mode 100755
index 0000000..483a2c2
--- /dev/null
+++ b/modules/pam_echo/tst-pam_echo
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_echo.so
diff --git a/modules/pam_echo/tst-pam_echo-retval.c b/modules/pam_echo/tst-pam_echo-retval.c
new file mode 100644
index 0000000..2374b71
--- /dev/null
+++ b/modules/pam_echo/tst-pam_echo-retval.c
@@ -0,0 +1,101 @@
+/*
+ * Check pam_echo return values.
+ *
+ * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
+ */
+
+#include "test_assert.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <security/pam_appl.h>
+
+#define MODULE_NAME "pam_echo"
+#define TEST_NAME "tst-" MODULE_NAME "-retval"
+
+static const char service_file[] = TEST_NAME ".service";
+static const char user_name[] = "";
+static struct pam_conv conv;
+
+int
+main(void)
+{
+ pam_handle_t *pamh = NULL;
+ FILE *fp;
+ char cwd[PATH_MAX];
+
+ ASSERT_NE(NULL, getcwd(cwd, sizeof(cwd)));
+
+ /* PAM_SUCCESS -> PAM_SUCCESS, PAM_IGNORE -> PAM_PERM_DENIED */
+ ASSERT_NE(NULL, fp = fopen(service_file, "w"));
+ ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
+ "auth required %s/.libs/%s.so\n"
+ "account required %s/.libs/%s.so\n"
+ "password required %s/.libs/%s.so\n"
+ "session required %s/.libs/%s.so\n",
+ cwd, MODULE_NAME,
+ cwd, MODULE_NAME,
+ cwd, MODULE_NAME,
+ cwd, MODULE_NAME));
+ ASSERT_EQ(0, fclose(fp));
+
+ ASSERT_EQ(PAM_SUCCESS,
+ pam_start_confdir(service_file, user_name, &conv, ".", &pamh));
+ ASSERT_NE(NULL, pamh);
+ ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, 0));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_setcred(pamh, 0));
+ ASSERT_EQ(PAM_SUCCESS, pam_acct_mgmt(pamh, 0));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_chauthtok(pamh, 0));
+ ASSERT_EQ(PAM_SUCCESS, pam_open_session(pamh, 0));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_close_session(pamh, 0));
+ ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+ pamh = NULL;
+
+ /* PAM_SILENT: PAM_IGNORE -> PAM_PERM_DENIED */
+ ASSERT_EQ(PAM_SUCCESS,
+ pam_start_confdir(service_file, user_name, &conv, ".", &pamh));
+ ASSERT_NE(NULL, pamh);
+ ASSERT_EQ(PAM_PERM_DENIED, pam_authenticate(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_setcred(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_acct_mgmt(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_chauthtok(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_open_session(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_PERM_DENIED, pam_close_session(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+ pamh = NULL;
+
+ /* PAM_IGNORE -> PAM_SUCCESS */
+ ASSERT_NE(NULL, fp = fopen(service_file, "w"));
+ ASSERT_LT(0, fprintf(fp, "#%%PAM-1.0\n"
+ "auth required %s/.libs/%s.so\n"
+ "auth required %s/../pam_permit/.libs/pam_permit.so\n"
+ "account required %s/.libs/%s.so\n"
+ "account required %s/../pam_permit/.libs/pam_permit.so\n"
+ "password required %s/.libs/%s.so\n"
+ "password required %s/../pam_permit/.libs/pam_permit.so\n"
+ "session required %s/.libs/%s.so\n"
+ "session required %s/../pam_permit/.libs/pam_permit.so\n",
+ cwd, MODULE_NAME, cwd,
+ cwd, MODULE_NAME, cwd,
+ cwd, MODULE_NAME, cwd,
+ cwd, MODULE_NAME, cwd));
+ ASSERT_EQ(0, fclose(fp));
+
+ ASSERT_EQ(PAM_SUCCESS,
+ pam_start_confdir(service_file, user_name, &conv, ".", &pamh));
+ ASSERT_NE(NULL, pamh);
+ ASSERT_EQ(PAM_SUCCESS, pam_authenticate(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_setcred(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_acct_mgmt(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_chauthtok(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_open_session(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_close_session(pamh, PAM_SILENT));
+ ASSERT_EQ(PAM_SUCCESS, pam_end(pamh, 0));
+ pamh = NULL;
+
+ ASSERT_EQ(0, unlink(service_file));
+
+ return 0;
+}