diff options
Diffstat (limited to 'modules/pam_rhosts')
-rw-r--r-- | modules/pam_rhosts/Makefile.am | 32 | ||||
-rw-r--r-- | modules/pam_rhosts/Makefile.in | 1114 | ||||
-rw-r--r-- | modules/pam_rhosts/README | 56 | ||||
-rw-r--r-- | modules/pam_rhosts/README.xml | 41 | ||||
-rw-r--r-- | modules/pam_rhosts/pam_rhosts.8 | 128 | ||||
-rw-r--r-- | modules/pam_rhosts/pam_rhosts.8.xml | 171 | ||||
-rw-r--r-- | modules/pam_rhosts/pam_rhosts.c | 137 | ||||
-rwxr-xr-x | modules/pam_rhosts/tst-pam_rhosts | 2 |
8 files changed, 1681 insertions, 0 deletions
diff --git a/modules/pam_rhosts/Makefile.am b/modules/pam_rhosts/Makefile.am new file mode 100644 index 0000000..7e04383 --- /dev/null +++ b/modules/pam_rhosts/Makefile.am @@ -0,0 +1,32 @@ +# +# Copyright (c) 2005, 2006, 2008, 2009 Thorsten Kukuk <kukuk@suse.de> +# + +CLEANFILES = *~ +MAINTAINERCLEANFILES = $(MANS) README + +EXTRA_DIST = README $(MANS) $(XMLS) tst-pam_rhosts + +TESTS = tst-pam_rhosts + +man_MANS = pam_rhosts.8 + +XMLS = README.xml pam_rhosts.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_rhosts.la +pam_rhosts_la_LIBADD = $(top_builddir)/libpam/libpam.la + +if ENABLE_REGENERATE_MAN +noinst_DATA = README +README: pam_rhosts.8.xml +-include $(top_srcdir)/Make.xml.rules +endif diff --git a/modules/pam_rhosts/Makefile.in b/modules/pam_rhosts/Makefile.in new file mode 100644 index 0000000..0c9e9fe --- /dev/null +++ b/modules/pam_rhosts/Makefile.in @@ -0,0 +1,1114 @@ +# Makefile.in generated by automake 1.13.4 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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/etc/hosts.equiv (or and ~/.rhosts. Firstly, hosts listed in the former +file are treated as equivalent to the localhost. Secondly, entries in the +user's own copy of the latter file is used to map "remote-host remote-user" +pairs to that user's account on the current host. Access is granted to the user +if their host is present in /etc/hosts.equiv and their remote account is +identical to their local one, or if their remote account has an entry in their +personal configuration file. + +The module authenticates a remote user (internally specified by the item +PAM_RUSER connecting from the remote host (internally specified by the item +PAM_RHOST). Accordingly, for applications to be compatible this authentication +module they must set these items prior to calling pam_authenticate(). The +module is not capable of independently probing the network connection for such +information. + +OPTIONS + +debug + + Print debug information. + +silent + + Don't print informative messages. + +superuser=account + + Handle account as root. + +EXAMPLES + +To grant a remote user access by /etc/hosts.equiv or .rhosts for rsh add the +following lines to /etc/pam.d/rsh: + +#%PAM-1.0 +# +auth required pam_rhosts.so +auth required pam_nologin.so +auth required pam_env.so +auth required pam_unix.so + + +AUTHOR + +pam_rhosts was written by Thorsten Kukuk <kukuk@thkukuk.de> + diff --git a/modules/pam_rhosts/README.xml b/modules/pam_rhosts/README.xml new file mode 100644 index 0000000..5d3307e --- /dev/null +++ b/modules/pam_rhosts/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_rhosts.8.xml"> +--> +]> + +<article> + + <articleinfo> + + <title> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_rhosts.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_rhosts-name"]/*)'/> + </title> + + </articleinfo> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_rhosts.8.xml" xpointer='xpointer(//refsect1[@id = "pam_rhosts-description"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_rhosts.8.xml" xpointer='xpointer(//refsect1[@id = "pam_rhosts-options"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_rhosts.8.xml" xpointer='xpointer(//refsect1[@id = "pam_rhosts-examples"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_rhosts.8.xml" xpointer='xpointer(//refsect1[@id = "pam_rhosts-author"]/*)'/> + </section> + +</article> diff --git a/modules/pam_rhosts/pam_rhosts.8 b/modules/pam_rhosts/pam_rhosts.8 new file mode 100644 index 0000000..c52a5d8 --- /dev/null +++ b/modules/pam_rhosts/pam_rhosts.8 @@ -0,0 +1,128 @@ +'\" t +.\" Title: pam_rhosts +.\" Author: [see the "AUTHOR" section] +.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> +.\" Date: 05/18/2017 +.\" Manual: Linux-PAM Manual +.\" Source: Linux-PAM Manual +.\" Language: English +.\" +.TH "PAM_RHOSTS" "8" "05/18/2017" "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_rhosts \- The rhosts PAM module +.SH "SYNOPSIS" +.HP \w'\fBpam_rhosts\&.so\fR\ 'u +\fBpam_rhosts\&.so\fR +.SH "DESCRIPTION" +.PP +This module performs the standard network authentication for services, as used by traditional implementations of +\fBrlogin\fR +and +\fBrsh\fR +etc\&. +.PP +The authentication mechanism of this module is based on the contents of two files; +/etc/hosts\&.equiv +(or and +~/\&.rhosts\&. Firstly, hosts listed in the former file are treated as equivalent to the localhost\&. Secondly, entries in the user\*(Aqs own copy of the latter file is used to map "\fIremote\-host remote\-user\fR" pairs to that user\*(Aqs account on the current host\&. Access is granted to the user if their host is present in +/etc/hosts\&.equiv +and their remote account is identical to their local one, or if their remote account has an entry in their personal configuration file\&. +.PP +The module authenticates a remote user (internally specified by the item +\fIPAM_RUSER\fR +connecting from the remote host (internally specified by the item +\fBPAM_RHOST\fR)\&. Accordingly, for applications to be compatible this authentication module they must set these items prior to calling +\fBpam_authenticate()\fR\&. The module is not capable of independently probing the network connection for such information\&. +.SH "OPTIONS" +.PP +\fBdebug\fR +.RS 4 +Print debug information\&. +.RE +.PP +\fBsilent\fR +.RS 4 +Don\*(Aqt print informative messages\&. +.RE +.PP +\fBsuperuser=\fR\fB\fIaccount\fR\fR +.RS 4 +Handle +\fIaccount\fR +as root\&. +.RE +.SH "MODULE TYPES PROVIDED" +.PP +Only the +\fBauth\fR +module type is provided\&. +.SH "RETURN VALUES" +.PP +PAM_AUTH_ERR +.RS 4 +The remote host, remote user name or the local user name couldn\*(Aqt be determined or access was denied by +\&.rhosts +file\&. +.RE +.PP +PAM_USER_UNKNOWN +.RS 4 +User is not known to system\&. +.RE +.SH "EXAMPLES" +.PP +To grant a remote user access by +/etc/hosts\&.equiv +or +\&.rhosts +for +\fBrsh\fR +add the following lines to +/etc/pam\&.d/rsh: +.sp +.if n \{\ +.RS 4 +.\} +.nf +#%PAM\-1\&.0 +# +auth required pam_rhosts\&.so +auth required pam_nologin\&.so +auth required pam_env\&.so +auth required pam_unix\&.so + +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.PP +\fBrootok\fR(3), +\fBhosts.equiv\fR(5), +\fBrhosts\fR(5), +\fBpam.conf\fR(5), +\fBpam.d\fR(5), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +pam_rhosts was written by Thorsten Kukuk <kukuk@thkukuk\&.de> diff --git a/modules/pam_rhosts/pam_rhosts.8.xml b/modules/pam_rhosts/pam_rhosts.8.xml new file mode 100644 index 0000000..eb96371 --- /dev/null +++ b/modules/pam_rhosts/pam_rhosts.8.xml @@ -0,0 +1,171 @@ +<?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_rhosts"> + + <refmeta> + <refentrytitle>pam_rhosts</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo> + </refmeta> + + <refnamediv id="pam_rhosts-name"> + <refname>pam_rhosts</refname> + <refpurpose>The rhosts PAM module</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis id="pam_rhosts-cmdsynopsis"> + <command>pam_rhosts.so</command> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1 id="pam_rhosts-description"> + + <title>DESCRIPTION</title> + + <para> + This module performs the standard network authentication for services, + as used by traditional implementations of <command>rlogin</command> + and <command>rsh</command> etc. + </para> + <para> + The authentication mechanism of this module is based on the contents + of two files; <filename>/etc/hosts.equiv</filename> (or + and <filename>~/.rhosts</filename>. Firstly, hosts listed in the + former file are treated as equivalent to the localhost. Secondly, + entries in the user's own copy of the latter file is used to map + "<emphasis>remote-host remote-user</emphasis>" pairs to that user's + account on the current host. Access is granted to the user if their + host is present in <filename>/etc/hosts.equiv</filename> and their + remote account is identical to their local one, or if their remote + account has an entry in their personal configuration file. + </para> + <para> + The module authenticates a remote user (internally specified by the + item <parameter>PAM_RUSER</parameter> connecting from the remote + host (internally specified by the item <command>PAM_RHOST</command>). + Accordingly, for applications to be compatible this authentication + module they must set these items prior to calling + <function>pam_authenticate()</function>. The module is not capable + of independently probing the network connection for such information. + </para> + </refsect1> + + <refsect1 id="pam_rhosts-options"> + <title>OPTIONS</title> + <variablelist> + <varlistentry> + <term> + <option>debug</option> + </term> + <listitem> + <para> + Print debug information. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>silent</option> + </term> + <listitem> + <para> + Don't print informative messages. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>superuser=<replaceable>account</replaceable></option> + </term> + <listitem> + <para> + Handle <replaceable>account</replaceable> as root. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id="pam_rhosts-types"> + <title>MODULE TYPES PROVIDED</title> + <para> + Only the <option>auth</option> module type is provided. + </para> + </refsect1> + + <refsect1 id='pam_rhosts-return_values'> + <title>RETURN VALUES</title> + <variablelist> + <varlistentry> + <term>PAM_AUTH_ERR</term> + <listitem> + <para> + The remote host, remote user name or the local user name + couldn't be determined or access was denied by + <filename>.rhosts</filename> file. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_USER_UNKNOWN</term> + <listitem> + <para> + User is not known to system. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id='pam_rhosts-examples'> + <title>EXAMPLES</title> + <para> + To grant a remote user access by <filename>/etc/hosts.equiv</filename> + or <filename>.rhosts</filename> for <command>rsh</command> add the + following lines to <filename>/etc/pam.d/rsh</filename>: + <programlisting> +#%PAM-1.0 +# +auth required pam_rhosts.so +auth required pam_nologin.so +auth required pam_env.so +auth required pam_unix.so + </programlisting> + </para> + </refsect1> + + <refsect1 id='pam_rhosts-see_also'> + <title>SEE ALSO</title> + <para> + <citerefentry> + <refentrytitle>rootok</refentrytitle><manvolnum>3</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>hosts.equiv</refentrytitle><manvolnum>5</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>rhosts</refentrytitle><manvolnum>5</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_rhosts-author'> + <title>AUTHOR</title> + <para> + pam_rhosts was written by Thorsten Kukuk <kukuk@thkukuk.de> + </para> + </refsect1> + +</refentry> diff --git a/modules/pam_rhosts/pam_rhosts.c b/modules/pam_rhosts/pam_rhosts.c new file mode 100644 index 0000000..ed98d63 --- /dev/null +++ b/modules/pam_rhosts/pam_rhosts.c @@ -0,0 +1,137 @@ +/* + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * ALTERNATIVELY, this product may be distributed under the terms of + * the GNU Public License, in which case the provisions of the GPL are + * required INSTEAD OF the above restrictions. (This clause is + * necessary due to a potential bad interaction between the GPL and + * the restrictions contained in a BSD-style copyright.) + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include "config.h" + +#include <pwd.h> +#include <netdb.h> +#include <string.h> +#include <syslog.h> + +#define PAM_SM_AUTH /* only defines this management group */ + +#include <security/pam_modules.h> +#include <security/pam_modutil.h> +#include <security/pam_ext.h> + +int pam_sm_authenticate (pam_handle_t *pamh, int flags, int argc, + const char **argv) +{ + const char *luser = NULL; + const char *ruser = NULL, *rhost = NULL; + const char *opt_superuser = NULL; + const void *c_void; + int opt_debug = 0; + int opt_silent; + int as_root; + int retval; + + opt_silent = flags & PAM_SILENT; + + while (argc-- > 0) { + if (strcmp(*argv, "debug") == 0) + opt_debug = 1; + else if (strcmp (*argv, "silent") == 0 || strcmp(*argv, "suppress") == 0) + opt_silent = 1; + else if (strncmp(*argv, "superuser=", sizeof("superuser=")-1) == 0) + opt_superuser = *argv+sizeof("superuser=")-1; + else + pam_syslog(pamh, LOG_WARNING, "unrecognized option '%s'", *argv); + + ++argv; + } + + retval = pam_get_item (pamh, PAM_RHOST, &c_void); + if (retval != PAM_SUCCESS) { + pam_syslog(pamh, LOG_ERR, "could not get the remote host name"); + return retval; + } + rhost = c_void; + + retval = pam_get_item(pamh, PAM_RUSER, &c_void); + ruser = c_void; + if (retval != PAM_SUCCESS) { + pam_syslog(pamh, LOG_ERR, "could not get the remote username"); + return retval; + } + + retval = pam_get_user(pamh, &luser, NULL); + if (retval != PAM_SUCCESS) { + pam_syslog(pamh, LOG_ERR, "could not determine name of local user"); + return retval; + } + + if (rhost == NULL || ruser == NULL || luser == NULL) + return PAM_AUTH_ERR; + + if (opt_superuser && strcmp(opt_superuser, luser) == 0) + as_root = 1; + else { + struct passwd *lpwd; + + lpwd = pam_modutil_getpwnam(pamh, luser); + if (lpwd == NULL) { + if (opt_debug) + /* don't print by default, could be the user's password */ + pam_syslog(pamh, LOG_DEBUG, + "user '%s' unknown to this system", luser); + return PAM_USER_UNKNOWN; + + } + as_root = (lpwd->pw_uid == 0); + } + +#ifdef HAVE_RUSEROK_AF + retval = ruserok_af (rhost, as_root, ruser, luser, PF_UNSPEC); +#else + retval = ruserok (rhost, as_root, ruser, luser); +#endif + if (retval != 0) { + if (!opt_silent || opt_debug) + pam_syslog(pamh, LOG_WARNING, "denied access to %s@%s as %s", + ruser, rhost, luser); + return PAM_AUTH_ERR; + } else { + if (!opt_silent || opt_debug) + pam_syslog(pamh, LOG_NOTICE, "allowed access to %s@%s as %s", + ruser, rhost, luser); + return PAM_SUCCESS; + } +} + + +int +pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) +{ + return PAM_SUCCESS; +} diff --git a/modules/pam_rhosts/tst-pam_rhosts b/modules/pam_rhosts/tst-pam_rhosts new file mode 100755 index 0000000..65e85a9 --- /dev/null +++ b/modules/pam_rhosts/tst-pam_rhosts @@ -0,0 +1,2 @@ +#!/bin/sh +../../tests/tst-dlopen .libs/pam_rhosts.so |