191094Sdes/*- 2115619Sdes * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3228690Sdes * Copyright (c) 2004-2011 Dag-Erling Sm��rgrav 491094Sdes * All rights reserved. 591094Sdes * 691094Sdes * This software was developed for the FreeBSD Project by ThinkSec AS and 799158Sdes * Network Associates Laboratories, the Security Research Division of 899158Sdes * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 999158Sdes * ("CBOSS"), as part of the DARPA CHATS research program. 1091094Sdes * 1191094Sdes * Redistribution and use in source and binary forms, with or without 1291094Sdes * modification, are permitted provided that the following conditions 1391094Sdes * are met: 1491094Sdes * 1. Redistributions of source code must retain the above copyright 1591094Sdes * notice, this list of conditions and the following disclaimer. 1691094Sdes * 2. Redistributions in binary form must reproduce the above copyright 1791094Sdes * notice, this list of conditions and the following disclaimer in the 1891094Sdes * documentation and/or other materials provided with the distribution. 1991094Sdes * 3. The name of the author may not be used to endorse or promote 2091094Sdes * products derived from this software without specific prior written 2191094Sdes * permission. 2291094Sdes * 2391094Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2491094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2591094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2691094Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2791094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2891094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2991094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3091094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3191094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3291094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3391094Sdes * SUCH DAMAGE. 3491094Sdes * 35271947Sdes * $Id: openpam_dispatch.c 807 2014-09-09 09:41:32Z des $ 3691094Sdes */ 3791094Sdes 38228690Sdes#ifdef HAVE_CONFIG_H 39228690Sdes# include "config.h" 40228690Sdes#endif 41228690Sdes 4291094Sdes#include <sys/param.h> 4391094Sdes 4491094Sdes#include <security/pam_appl.h> 4591094Sdes 4691094Sdes#include "openpam_impl.h" 4791094Sdes 4891094Sdes#if !defined(OPENPAM_RELAX_CHECKS) 49228690Sdesstatic void openpam_check_error_code(int, int); 5091094Sdes#else 51228690Sdes#define openpam_check_error_code(a, b) 5291094Sdes#endif /* !defined(OPENPAM_RELAX_CHECKS) */ 5391094Sdes 5491094Sdes/* 5591100Sdes * OpenPAM internal 5691100Sdes * 5791094Sdes * Execute a module chain 5891094Sdes */ 5991094Sdes 6091094Sdesint 6191094Sdesopenpam_dispatch(pam_handle_t *pamh, 6291094Sdes int primitive, 6391094Sdes int flags) 6491094Sdes{ 6591094Sdes pam_chain_t *chain; 66271947Sdes int err, fail, nsuccess, r; 67114536Sdes int debug; 6891094Sdes 69107937Sdes ENTER(); 7091094Sdes if (pamh == NULL) 71107937Sdes RETURNC(PAM_SYSTEM_ERR); 7291094Sdes 7391094Sdes /* prevent recursion */ 7491094Sdes if (pamh->current != NULL) { 75107937Sdes openpam_log(PAM_LOG_ERROR, 76107937Sdes "%s() called while %s::%s() is in progress", 77228690Sdes pam_func_name[primitive], 78107937Sdes pamh->current->module->path, 79228690Sdes pam_sm_func_name[pamh->primitive]); 80107937Sdes RETURNC(PAM_ABORT); 8191094Sdes } 8291094Sdes 8391094Sdes /* pick a chain */ 8491094Sdes switch (primitive) { 8591094Sdes case PAM_SM_AUTHENTICATE: 8691094Sdes case PAM_SM_SETCRED: 8791094Sdes chain = pamh->chains[PAM_AUTH]; 8891094Sdes break; 8991094Sdes case PAM_SM_ACCT_MGMT: 9091094Sdes chain = pamh->chains[PAM_ACCOUNT]; 9191094Sdes break; 9291094Sdes case PAM_SM_OPEN_SESSION: 9391094Sdes case PAM_SM_CLOSE_SESSION: 9491094Sdes chain = pamh->chains[PAM_SESSION]; 9591094Sdes break; 9691094Sdes case PAM_SM_CHAUTHTOK: 9791094Sdes chain = pamh->chains[PAM_PASSWORD]; 9891094Sdes break; 9991094Sdes default: 100107937Sdes RETURNC(PAM_SYSTEM_ERR); 10191094Sdes } 10291094Sdes 10391094Sdes /* execute */ 104271947Sdes err = PAM_SUCCESS; 105271947Sdes fail = nsuccess = 0; 106271947Sdes for (; chain != NULL; chain = chain->next) { 10791094Sdes if (chain->module->func[primitive] == NULL) { 10891094Sdes openpam_log(PAM_LOG_ERROR, "%s: no %s()", 109228690Sdes chain->module->path, pam_sm_func_name[primitive]); 110228690Sdes r = PAM_SYSTEM_ERR; 11191094Sdes } else { 112107937Sdes pamh->primitive = primitive; 11391094Sdes pamh->current = chain; 114114536Sdes debug = (openpam_get_option(pamh, "debug") != NULL); 115114536Sdes if (debug) 116228690Sdes ++openpam_debug; 117255376Sdes openpam_log(PAM_LOG_LIBDEBUG, "calling %s() in %s", 118228690Sdes pam_sm_func_name[primitive], chain->module->path); 11991094Sdes r = (chain->module->func[primitive])(pamh, flags, 120294192Sdes chain->optc, (const char **)(intptr_t)chain->optv); 12191094Sdes pamh->current = NULL; 122255376Sdes openpam_log(PAM_LOG_LIBDEBUG, "%s: %s(): %s", 123228690Sdes chain->module->path, pam_sm_func_name[primitive], 12491094Sdes pam_strerror(pamh, r)); 125114536Sdes if (debug) 126228690Sdes --openpam_debug; 12791094Sdes } 12891094Sdes 12991094Sdes if (r == PAM_IGNORE) 13091094Sdes continue; 131271947Sdes if (r == PAM_SUCCESS) { 132271947Sdes ++nsuccess; 13391094Sdes /* 13491684Sdes * For pam_setcred() and pam_chauthtok() with the 13591684Sdes * PAM_PRELIM_CHECK flag, treat "sufficient" as 13691094Sdes * "optional". 13791094Sdes */ 13899158Sdes if ((chain->flag == PAM_SUFFICIENT || 13999158Sdes chain->flag == PAM_BINDING) && !fail && 14091684Sdes primitive != PAM_SM_SETCRED && 14199158Sdes !(primitive == PAM_SM_CHAUTHTOK && 14299158Sdes (flags & PAM_PRELIM_CHECK))) 14391094Sdes break; 14491097Sdes continue; 14591094Sdes } 14691094Sdes 147228690Sdes openpam_check_error_code(primitive, r); 14891094Sdes 14991094Sdes /* 15091094Sdes * Record the return code from the first module to 15191094Sdes * fail. If a required module fails, record the 15291094Sdes * return code from the first required module to fail. 15391094Sdes */ 154271947Sdes if (err == PAM_SUCCESS) 15591094Sdes err = r; 15699158Sdes if ((chain->flag == PAM_REQUIRED || 15799158Sdes chain->flag == PAM_BINDING) && !fail) { 158255376Sdes openpam_log(PAM_LOG_LIBDEBUG, "required module failed"); 15991094Sdes fail = 1; 16091094Sdes err = r; 16191094Sdes } 16291094Sdes 16391094Sdes /* 16491094Sdes * If a requisite module fails, terminate the chain 16591094Sdes * immediately. 16691094Sdes */ 16791094Sdes if (chain->flag == PAM_REQUISITE) { 168255376Sdes openpam_log(PAM_LOG_LIBDEBUG, "requisite module failed"); 16991094Sdes fail = 1; 17091094Sdes break; 17191094Sdes } 17291094Sdes } 17391094Sdes 17499158Sdes if (!fail && err != PAM_NEW_AUTHTOK_REQD) 17591097Sdes err = PAM_SUCCESS; 176271947Sdes 177271947Sdes /* 178271947Sdes * Require the chain to be non-empty, and at least one module 179271947Sdes * in the chain to be successful, so that we don't fail open. 180271947Sdes */ 181271947Sdes if (err == PAM_SUCCESS && nsuccess < 1) { 182271947Sdes openpam_log(PAM_LOG_ERROR, 183271947Sdes "all modules were unsuccessful for %s()", 184271947Sdes pam_sm_func_name[primitive]); 185271947Sdes err = PAM_SYSTEM_ERR; 186271947Sdes } 187271947Sdes 188107937Sdes RETURNC(err); 18991094Sdes} 19091094Sdes 19191094Sdes#if !defined(OPENPAM_RELAX_CHECKS) 19291094Sdesstatic void 193228690Sdesopenpam_check_error_code(int primitive, int r) 19491094Sdes{ 19591094Sdes /* common error codes */ 19691097Sdes if (r == PAM_SUCCESS || 197255376Sdes r == PAM_SYSTEM_ERR || 19891097Sdes r == PAM_SERVICE_ERR || 19991094Sdes r == PAM_BUF_ERR || 20091094Sdes r == PAM_CONV_ERR || 20191097Sdes r == PAM_PERM_DENIED || 20291097Sdes r == PAM_ABORT) 20391094Sdes return; 20491094Sdes 20591094Sdes /* specific error codes */ 20691094Sdes switch (primitive) { 20791094Sdes case PAM_SM_AUTHENTICATE: 20891094Sdes if (r == PAM_AUTH_ERR || 20991094Sdes r == PAM_CRED_INSUFFICIENT || 21091094Sdes r == PAM_AUTHINFO_UNAVAIL || 21191094Sdes r == PAM_USER_UNKNOWN || 21291094Sdes r == PAM_MAXTRIES) 21391094Sdes return; 21491094Sdes break; 21591094Sdes case PAM_SM_SETCRED: 21691094Sdes if (r == PAM_CRED_UNAVAIL || 21791094Sdes r == PAM_CRED_EXPIRED || 21891094Sdes r == PAM_USER_UNKNOWN || 21991094Sdes r == PAM_CRED_ERR) 22091094Sdes return; 22191094Sdes break; 22291094Sdes case PAM_SM_ACCT_MGMT: 22391094Sdes if (r == PAM_USER_UNKNOWN || 22491094Sdes r == PAM_AUTH_ERR || 22591094Sdes r == PAM_NEW_AUTHTOK_REQD || 22691094Sdes r == PAM_ACCT_EXPIRED) 22791094Sdes return; 22891094Sdes break; 22991094Sdes case PAM_SM_OPEN_SESSION: 23091094Sdes case PAM_SM_CLOSE_SESSION: 23191094Sdes if (r == PAM_SESSION_ERR) 23291094Sdes return; 23391094Sdes break; 23491094Sdes case PAM_SM_CHAUTHTOK: 23591094Sdes if (r == PAM_PERM_DENIED || 23691094Sdes r == PAM_AUTHTOK_ERR || 23791094Sdes r == PAM_AUTHTOK_RECOVERY_ERR || 23891094Sdes r == PAM_AUTHTOK_LOCK_BUSY || 23991684Sdes r == PAM_AUTHTOK_DISABLE_AGING || 24091684Sdes r == PAM_TRY_AGAIN) 24191094Sdes return; 24291094Sdes break; 24391094Sdes } 24491094Sdes 24591094Sdes openpam_log(PAM_LOG_ERROR, "%s(): unexpected return value %d", 246228690Sdes pam_sm_func_name[primitive], r); 24791094Sdes} 24891094Sdes#endif /* !defined(OPENPAM_RELAX_CHECKS) */ 24991100Sdes 25091100Sdes/* 25191100Sdes * NODOC 25291100Sdes * 25391100Sdes * Error codes: 25491100Sdes */ 255