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Initial import of CVS-v2_8_branch

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Fred Gleason
2014-08-12 15:13:02 -04:00
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45
pam_rd/Makefile.am Normal file
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## automake.am
##
## Automake.am for rivendell/pam_rd
##
## by Federico Grau <grauf@rfa.org> <donfede@casagrau.org>
## based on work by Fred Gleason <fredg@paravelsystems.com> and from
## libpam-ldap-178
##
## $Id: Makefile.am,v 1.9.8.1 2012/11/29 01:37:35 cvs Exp $
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License version 2 as
## published by the Free Software Foundation.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public
## License along with this program; if not, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
##
## Use automake to process this into a Makefile.in
AM_CPPFLAGS = -Wall -DPREFIX=\"$(prefix)\" -DQTDIR=\"@QT_DIR@\" -fPIC @QT_CXXFLAGS@
INCLUDES = -I$(top_srcdir)/lib
LIBS = @QT_LIBS@ -L$(top_srcdir)/lib
MOC = @QT_MOC@
# The dependency for qt's Meta Object Compiler (moc)
moc_%.cpp: %.h
$(MOC) $< -o $@
inst_lib_LTLIBRARIES = pam_rd.la
inst_libdir=/@RD_LIB_PATH@/security
dist_pam_rd_la_SOURCES = pam_rd.cpp
pam_rd_la_LDFLAGS = -module -shared -Xlinker -x -avoid-version -export-dynamic
pam_rd_la_LIBADD = @LIB_RDLIBS@ -lpam @LIBVORBIS@
CLEANFILES = *~\
*.qm\
moc_*
DISTCLEANFILES = Makefile.in

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pam_rd/pam_rd.cpp Normal file
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// pam_rd.c : The PAM authentication module of Rivendell
//
// (C) Copyright 2006 Federico Grau <donfede@casagrau.org> <grauf@rfa.org>
//
// $Id: pam_rd.cpp,v 1.10 2010/09/10 18:16:27 cvs Exp $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// created 2006-06-16 grauf@rfa.org
//
// ideas borrowed from:
// pam_permit.c from Linux-PAM
// by Andrew Morgan <morgan@parc.power.net> 1996/3/11
// pam_deny.c from Linux-PAM
// by Andrew Morgan <morgan@parc.power.net> 1996/3/11
// pam_mysql.c
// by James O'Kane <jo2y@midnightlinux.com> and others
// pam_winbind.c
// by Andrew Bartlett <abartlet@samba.org> 2002 and others
// Rivendell by Fred Gleason <fredg@paravelsystems.com>
/*
* include and definitions
*/
#define PAM_SM_AUTH
#include <security/pam_modules.h>
/* note: _pam_macros.h is for _drop_reply() macros. This is specific to
* Linux-PAM and not generally distributed by Sun. */
#include <security/_pam_macros.h>
#include <syslog.h>
#define SYSLOG_IDENT "pam_rd"
#define SYSLOG_FACILITY LOG_AUTHPRIV
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <errno.h>
#include <qapplication.h>
#include <qsqldatabase.h>
#include <rd.h>
#include <rdconfig.h>
#include <rdcheck_daemons.h>
#include <rdripc.h>
#include <rdstation.h>
#include <rduser.h>
// The pam module name, this should be unique amongst pam modules.
#define MODULE_NAME SYSLOG_IDENT
/*
* utility functions and related definitions
*/
#define PAM_RD_DEBUG (1<<0)
#define PAM_RD_TRY_FIRST_PASS (1<<1)
#define PAM_RD_USE_FIRST_PASS (1<<2)
#define PAM_RD_KILL_RD_DAEMONS (1<<3)
#define PAM_RD_IGNORE_PASS (1<<4)
#define PAM_RD_FAIL_DEFAULT_USER (1<<5)
/* utility function to parse module arguements and return an int with bits set
* to corresponding options */
static int parse_args(int argc, const char **argv, char **tmp_user)
{
int ctrl;
/* step through arguments */
for (ctrl = 0; argc-- > 0; ++argv) {
/* generic options */
if (!strcmp(*argv,"debug")) {
ctrl |= PAM_RD_DEBUG;
}
else if (!strcasecmp(*argv, "use_first_pass")) {
ctrl |= PAM_RD_USE_FIRST_PASS;
}
else if (!strcasecmp(*argv, "try_first_pass")) {
ctrl |= PAM_RD_TRY_FIRST_PASS;
}
/* pam_rd specific options */
else if (!strcasecmp(*argv, "kill_rd_daemons")) {
/* kill any previously running rivendell daemons */
ctrl |= PAM_RD_KILL_RD_DAEMONS;
}
else if (!strcasecmp(*argv, "ignore_pass")) {
/* log the user into rivendell, ignoring any password check. the
* idea is to "trust" the network logon credentials and ignore the
* rivendell credentials */
ctrl |= PAM_RD_IGNORE_PASS;
}
else if (!strncasecmp(*argv, "fail_default_user=", 18)) {
/* the Rivendell user account is set to the the user specified by
* this option if there is a failure authenticating */
*tmp_user = strdup(18+*argv);
if (*tmp_user != NULL) {
syslog(LOG_NOTICE, "DEBUG ... read fail_default_user|%s|", *tmp_user);
ctrl |= PAM_RD_FAIL_DEFAULT_USER;
} else {
syslog(LOG_ERR,
"parse_args(): invalid fail_default_user specified - ignored");
}
} else {
syslog(LOG_ERR, "parse_args(): ignoring unknown option; %s", *argv);
}
}
return ctrl;
}
/* utility function to be used for PAM conversation callback */
int converse(pam_handle_t *pamh,
int nargs,
struct pam_message **message,
struct pam_response **response)
{
int retval;
struct pam_conv *conv;
retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
if (retval == PAM_SUCCESS) {
retval = conv->conv(nargs,
(const struct pam_message **) message,
response, conv->appdata_ptr);
if ((retval != PAM_SUCCESS) && (retval != PAM_CONV_AGAIN))
syslog(LOG_ERR, "conversation failure [%s]",
pam_strerror(pamh, retval));
} else {
syslog(LOG_ERR, "couldn't obtain coversation function [%s]",
pam_strerror(pamh, retval));
}
return retval; /* propagate error status */
}
/* utility function to setup PAM conversation callback */
int ask_passwd(pam_handle_t *pamh, int pwtype)
{
struct pam_message msg[1], *mesg[1];
struct pam_response *resp = NULL;
int i = 0;
int retval;
msg[i].msg = "Password: ";
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
mesg[i] = &msg[i];
retval = converse(pamh, ++i, mesg, &resp);
if (retval != PAM_SUCCESS) {
if (resp != NULL)
_pam_drop_reply(resp,i);
return ((retval == PAM_CONV_AGAIN)
? PAM_INCOMPLETE : PAM_AUTHINFO_UNAVAIL);
}
/* we have a password so set AUTHTOK
*/
retval=pam_set_item(pamh, pwtype, resp->resp);
_pam_drop_reply(resp,i);
return retval;
}
/* PAM authentication management functions */
/* Performs the task of authenticating the user. */
PAM_EXTERN int pam_sm_authenticate (pam_handle_t *pamh,
int flags,
int argc,
const char **argv)
{
int retval;
int ctrl = 0;
const char *username=NULL;
char *password=NULL;
char *tmp_buf=NULL; // Temporary buffer to get default_username option.
char *fail_default_username=RD_USER_LOGIN_NAME; // Initialize default value.
RDConfig *login_config;
RDStation *login_station;
RDUser * login_user;
QSqlDatabase *login_db;
openlog(SYSLOG_IDENT, LOG_CONS|LOG_PID, SYSLOG_FACILITY);
/* parse arguments */
ctrl = parse_args(argc, argv, &tmp_buf);
if (ctrl & PAM_RD_DEBUG) syslog(LOG_DEBUG, "pam_sm_authenticate called.");
if (ctrl & PAM_RD_DEBUG) {
syslog(LOG_DEBUG, "argument flags ctrl:%d (0x%x)", ctrl, ctrl);
}
if (ctrl & PAM_RD_FAIL_DEFAULT_USER) {
fail_default_username = tmp_buf;
}
/* get username */
retval = pam_get_user(pamh, &username, NULL);
if ((retval != PAM_SUCCESS)
|| (username == NULL)
|| (*username == '\0')) {
syslog(LOG_ERR, "get username returned error: %s",
pam_strerror(pamh, retval));
return retval;
}
if (ctrl & PAM_RD_DEBUG) syslog(LOG_DEBUG, "got user:%s", username);
if (ctrl & ~PAM_RD_IGNORE_PASS) {
/* get password */
if ((ctrl & PAM_RD_TRY_FIRST_PASS) || (ctrl & PAM_RD_USE_FIRST_PASS)) {
retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **) &password);
}
/* if no password yet, and not configured to only use the first
* password, then ask */
if ((password == NULL) && (ctrl & ~PAM_RD_USE_FIRST_PASS)) {
retval = ask_passwd(pamh, PAM_AUTHTOK);
}
retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&password);
if (password == NULL) {
syslog(LOG_ERR, "Could not retrieve user's password");
return PAM_AUTHINFO_UNAVAIL;
}
if (ctrl & PAM_RD_DEBUG) syslog(LOG_DEBUG, "got password");
}
/* Load configs */
login_config=new RDConfig();
login_config->load();
/* kill daemons if requested */
if (ctrl & PAM_RD_KILL_RD_DAEMONS) {
if (ctrl & PAM_RD_DEBUG) syslog(LOG_DEBUG, "killing RD daemons");
RDKillDaemons();
}
/* authenticate the user */
login_station=new RDStation(login_config->stationName());
// Initialize QT application, without the gui. Much like the database
// connection, while not used here, it is used by underlying functions.
QApplication a(argc, (char **) argv, false); // FIXME: in QT4 there is a QCoreApplication object that could be used here better.
// Open Database.
// NOTE: while the database connection is not used in this module/file
// directly, it is required by the underlying functions, ex:
// login_user->checkPassword()
login_db=QSqlDatabase::addDatabase(login_config->mysqlDriver());
if(!login_db) {
syslog(LOG_ERR, QString().sprintf("Unable to load QSql driver: %s",
login_config->mysqlDriver().ascii()));
return PAM_AUTHINFO_UNAVAIL;
}
login_db->setDatabaseName(login_config->mysqlDbname());
login_db->setUserName(login_config->mysqlUsername());
login_db->setPassword(login_config->mysqlPassword());
login_db->setHostName(login_config->mysqlHostname());
if(!login_db->open()) {
syslog(LOG_ERR, "Unable to connet to mySQL server");
login_db->removeDatabase(login_config->mysqlDbname());
return PAM_AUTHINFO_UNAVAIL;
}
if (ctrl & PAM_RD_DEBUG) syslog(LOG_DEBUG, "connected to database");
login_user = new RDUser(username);
if (ctrl & PAM_RD_IGNORE_PASS) {
// Ignore password, simply check if corresponding user exists.
if (login_user->exists()) {
login_station->setDefaultName(username);
syslog(LOG_NOTICE,
"ignoring password. RD Default User set to: %s", username);
} else {
login_station->setDefaultName(fail_default_username);
syslog(LOG_NOTICE,
"ignoring password. RDUser not found, defaulting to: %s",
fail_default_username);
}
} else {
// Check password.
if ( login_user->checkPassword(QString(password), false) ) {
login_station->setDefaultName(username);
syslog(LOG_NOTICE,
"authenticated. RD Default User set to: %s", username);
} else {
login_station->setDefaultName(fail_default_username);
syslog(LOG_NOTICE,
"authentication failed. RDUser defaulting to: %s",
fail_default_username);
}
}
/* cleanup */
delete login_user;
login_db->removeDatabase(login_config->mysqlDbname());
delete login_station;
delete login_config;
syslog(LOG_NOTICE, "DEBUG ... end pam_rd");
return PAM_SUCCESS;
}
/* Performs setting of credentials (after the user is authenticated). In the
* case of Rivendell, the "credential" is registering with the database. */
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh,int flags,int argc
,const char **argv)
{
return PAM_SUCCESS;
}