pam_krb5.c revision 147810
181477Smarkm/*- 2109069Snectar * This pam_krb5 module contains code that is: 3109069Snectar * Copyright (c) Derrick J. Brashear, 1996. All rights reserved. 4109069Snectar * Copyright (c) Frank Cusack, 1999-2001. All rights reserved. 5109069Snectar * Copyright (c) Jacques A. Vidrine, 2000-2001. All rights reserved. 6109069Snectar * Copyright (c) Nicolas Williams, 2001. All rights reserved. 7109069Snectar * Copyright (c) Perot Systems Corporation, 2001. All rights reserved. 8109069Snectar * Copyright (c) Mark R V Murray, 2001. All rights reserved. 9140667Srwatson * Copyright (c) Networks Associates Technology, Inc., 2002-2005. 10109069Snectar * All rights reserved. 1194564Sdes * 1293984Sdes * Portions of this software were developed for the FreeBSD Project by 1393984Sdes * ThinkSec AS and NAI Labs, the Security Research Division of Network 1493984Sdes * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 1593984Sdes * ("CBOSS"), as part of the DARPA CHATS research program. 16110274Sdes * 1781477Smarkm * Redistribution and use in source and binary forms, with or without 1881477Smarkm * modification, are permitted provided that the following conditions 1981477Smarkm * are met: 2081477Smarkm * 1. Redistributions of source code must retain the above copyright 21109069Snectar * notices, and the entire permission notice in its entirety, 2281477Smarkm * including the disclaimer of warranties. 2381477Smarkm * 2. Redistributions in binary form must reproduce the above copyright 2481477Smarkm * notice, this list of conditions and the following disclaimer in the 2581477Smarkm * documentation and/or other materials provided with the distribution. 2681477Smarkm * 3. The name of the author may not be used to endorse or promote 2781477Smarkm * products derived from this software without specific prior 2881477Smarkm * written permission. 29110274Sdes * 3081477Smarkm * ALTERNATIVELY, this product may be distributed under the terms of 3181477Smarkm * the GNU Public License, in which case the provisions of the GPL are 3281477Smarkm * required INSTEAD OF the above restrictions. (This clause is 3381477Smarkm * necessary due to a potential bad interaction between the GPL and 3481477Smarkm * the restrictions contained in a BSD-style copyright.) 35110274Sdes * 3681477Smarkm * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 3781477Smarkm * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 3881477Smarkm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 3981477Smarkm * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 4081477Smarkm * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 4181477Smarkm * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 4281477Smarkm * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4381477Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4481477Smarkm * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4581477Smarkm * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 4681477Smarkm * OF THE POSSIBILITY OF SUCH DAMAGE. 4794564Sdes * 4881477Smarkm */ 4981477Smarkm 5084218Sdillon#include <sys/cdefs.h> 5184218Sdillon__FBSDID("$FreeBSD: head/lib/libpam/modules/pam_krb5/pam_krb5.c 147810 2005-07-07 14:16:38Z kensmith $"); 5284218Sdillon 5381477Smarkm#include <sys/types.h> 5481477Smarkm#include <sys/stat.h> 5581477Smarkm#include <errno.h> 5681477Smarkm#include <limits.h> 5781477Smarkm#include <pwd.h> 5881477Smarkm#include <stdio.h> 5981477Smarkm#include <stdlib.h> 6093984Sdes#include <string.h> 6181477Smarkm#include <syslog.h> 6281477Smarkm#include <unistd.h> 6381477Smarkm 6481477Smarkm#include <krb5.h> 6581477Smarkm#include <com_err.h> 6681477Smarkm 6781477Smarkm#define PAM_SM_AUTH 6881477Smarkm#define PAM_SM_ACCOUNT 6981477Smarkm#define PAM_SM_PASSWORD 7081477Smarkm 7181477Smarkm#include <security/pam_appl.h> 7281477Smarkm#include <security/pam_modules.h> 7390229Sdes#include <security/pam_mod_misc.h> 74115465Sdes#include <security/openpam.h> 7581477Smarkm 7681477Smarkm#define COMPAT_HEIMDAL 7781477Smarkm/* #define COMPAT_MIT */ 7881477Smarkm 7981477Smarkmstatic int verify_krb_v5_tgt(krb5_context, krb5_ccache, char *, int); 8081477Smarkmstatic void cleanup_cache(pam_handle_t *, void *, int); 8181477Smarkmstatic const char *compat_princ_component(krb5_context, krb5_principal, int); 8281477Smarkmstatic void compat_free_data_contents(krb5_context, krb5_data *); 8381477Smarkm 8481477Smarkm#define USER_PROMPT "Username: " 8585485Ssobomax#define PASSWORD_PROMPT "Password:" 8685485Ssobomax#define NEW_PASSWORD_PROMPT "New Password:" 8781477Smarkm 88115465Sdes#define PAM_OPT_CCACHE "ccache" 89140667Srwatson#define PAM_OPT_DEBUG "debug" 90115465Sdes#define PAM_OPT_FORWARDABLE "forwardable" 91115465Sdes#define PAM_OPT_NO_CCACHE "no_ccache" 92115465Sdes#define PAM_OPT_REUSE_CCACHE "reuse_ccache" 9381477Smarkm 9481477Smarkm/* 9581477Smarkm * authentication management 9681477Smarkm */ 9781477SmarkmPAM_EXTERN int 9894564Sdespam_sm_authenticate(pam_handle_t *pamh, int flags __unused, 99115465Sdes int argc __unused, const char *argv[] __unused) 10081477Smarkm{ 10181477Smarkm krb5_error_code krbret; 10281477Smarkm krb5_context pam_context; 10381477Smarkm krb5_creds creds; 10481477Smarkm krb5_principal princ; 105106864Snectar krb5_ccache ccache; 10681477Smarkm krb5_get_init_creds_opt opts; 10781477Smarkm struct passwd *pwd; 10881477Smarkm int retval; 109125650Sdes void *ccache_data; 110123454Sdes const char *user, *pass; 111125650Sdes const void *sourceuser, *service; 112106864Snectar char *principal, *princ_name, *ccache_name, luser[32], *srvdup; 11381477Smarkm 11481477Smarkm retval = pam_get_user(pamh, &user, USER_PROMPT); 11581477Smarkm if (retval != PAM_SUCCESS) 11694564Sdes return (retval); 11781477Smarkm 11881477Smarkm PAM_LOG("Got user: %s", user); 11981477Smarkm 120123454Sdes retval = pam_get_item(pamh, PAM_RUSER, &sourceuser); 12181477Smarkm if (retval != PAM_SUCCESS) 12294564Sdes return (retval); 12381477Smarkm 124123454Sdes PAM_LOG("Got ruser: %s", (const char *)sourceuser); 12581477Smarkm 12681477Smarkm service = NULL; 127123454Sdes pam_get_item(pamh, PAM_SERVICE, &service); 12881477Smarkm if (service == NULL) 12981477Smarkm service = "unknown"; 13081477Smarkm 131123454Sdes PAM_LOG("Got service: %s", (const char *)service); 13281477Smarkm 13381477Smarkm krbret = krb5_init_context(&pam_context); 13481477Smarkm if (krbret != 0) { 13581477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 13694564Sdes return (PAM_SERVICE_ERR); 13781477Smarkm } 13881477Smarkm 13981477Smarkm PAM_LOG("Context initialised"); 14081477Smarkm 14181477Smarkm krb5_get_init_creds_opt_init(&opts); 14281477Smarkm 143115465Sdes if (openpam_get_option(pamh, PAM_OPT_FORWARDABLE)) 14481477Smarkm krb5_get_init_creds_opt_set_forwardable(&opts, 1); 14581477Smarkm 14681477Smarkm PAM_LOG("Credentials initialised"); 14781477Smarkm 14881477Smarkm krbret = krb5_cc_register(pam_context, &krb5_mcc_ops, FALSE); 14981477Smarkm if (krbret != 0 && krbret != KRB5_CC_TYPE_EXISTS) { 15081477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 15181477Smarkm retval = PAM_SERVICE_ERR; 15281477Smarkm goto cleanup3; 15381477Smarkm } 15481477Smarkm 15581477Smarkm PAM_LOG("Done krb5_cc_register()"); 15681477Smarkm 15781477Smarkm /* Get principal name */ 158115465Sdes if (openpam_get_option(pamh, PAM_OPT_AUTH_AS_SELF)) 159123454Sdes asprintf(&principal, "%s/%s", (const char *)sourceuser, user); 16081477Smarkm else 16181477Smarkm principal = strdup(user); 16281477Smarkm 16381477Smarkm PAM_LOG("Created principal: %s", principal); 16481477Smarkm 16581477Smarkm krbret = krb5_parse_name(pam_context, principal, &princ); 16681477Smarkm free(principal); 16781477Smarkm if (krbret != 0) { 168106862Snectar PAM_LOG("Error krb5_parse_name(): %s", 169106862Snectar krb5_get_err_text(pam_context, krbret)); 17081477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 17181477Smarkm retval = PAM_SERVICE_ERR; 17281477Smarkm goto cleanup3; 17381477Smarkm } 17481477Smarkm 17581477Smarkm PAM_LOG("Done krb5_parse_name()"); 17681477Smarkm 17781477Smarkm /* Now convert the principal name into something human readable */ 17881477Smarkm princ_name = NULL; 17981477Smarkm krbret = krb5_unparse_name(pam_context, princ, &princ_name); 18081477Smarkm if (krbret != 0) { 181106862Snectar PAM_LOG("Error krb5_unparse_name(): %s", 182106862Snectar krb5_get_err_text(pam_context, krbret)); 18381477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 18481477Smarkm retval = PAM_SERVICE_ERR; 18581477Smarkm goto cleanup2; 18681477Smarkm } 18781477Smarkm 18881477Smarkm PAM_LOG("Got principal: %s", princ_name); 18981477Smarkm 19081477Smarkm /* Get password */ 19193984Sdes retval = pam_get_authtok(pamh, PAM_AUTHTOK, &pass, PASSWORD_PROMPT); 19281477Smarkm if (retval != PAM_SUCCESS) 19381477Smarkm goto cleanup2; 19481477Smarkm 19581477Smarkm PAM_LOG("Got password"); 19681477Smarkm 19781477Smarkm /* Verify the local user exists (AFTER getting the password) */ 19881477Smarkm if (strchr(user, '@')) { 19981477Smarkm /* get a local account name for this principal */ 20081477Smarkm krbret = krb5_aname_to_localname(pam_context, princ, 20181477Smarkm sizeof(luser), luser); 20281477Smarkm if (krbret != 0) { 20381477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 20481477Smarkm PAM_LOG("Error krb5_aname_to_localname(): %s", 205106862Snectar krb5_get_err_text(pam_context, krbret)); 20681477Smarkm retval = PAM_USER_UNKNOWN; 20781477Smarkm goto cleanup2; 20881477Smarkm } 20981477Smarkm 21081477Smarkm retval = pam_set_item(pamh, PAM_USER, luser); 21181477Smarkm if (retval != PAM_SUCCESS) 21281477Smarkm goto cleanup2; 21381477Smarkm 21481477Smarkm PAM_LOG("PAM_USER Redone"); 21581477Smarkm } 21681477Smarkm 21781477Smarkm pwd = getpwnam(user); 21881477Smarkm if (pwd == NULL) { 21981477Smarkm retval = PAM_USER_UNKNOWN; 22081477Smarkm goto cleanup2; 22181477Smarkm } 22281477Smarkm 22381477Smarkm PAM_LOG("Done getpwnam()"); 22481477Smarkm 22581477Smarkm /* Get a TGT */ 22681477Smarkm memset(&creds, 0, sizeof(krb5_creds)); 22781477Smarkm krbret = krb5_get_init_creds_password(pam_context, &creds, princ, 22881477Smarkm pass, NULL, pamh, 0, NULL, &opts); 22981477Smarkm if (krbret != 0) { 23081477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 23181477Smarkm PAM_LOG("Error krb5_get_init_creds_password(): %s", 232106862Snectar krb5_get_err_text(pam_context, krbret)); 23381477Smarkm retval = PAM_AUTH_ERR; 23481477Smarkm goto cleanup2; 23581477Smarkm } 23681477Smarkm 23781477Smarkm PAM_LOG("Got TGT"); 23881477Smarkm 239106864Snectar /* Generate a temporary cache */ 240106864Snectar krbret = krb5_cc_gen_new(pam_context, &krb5_mcc_ops, &ccache); 24181477Smarkm if (krbret != 0) { 24281477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 243106864Snectar PAM_LOG("Error krb5_cc_gen_new(): %s", 244106862Snectar krb5_get_err_text(pam_context, krbret)); 24581477Smarkm retval = PAM_SERVICE_ERR; 24681477Smarkm goto cleanup; 24781477Smarkm } 24881477Smarkm krbret = krb5_cc_initialize(pam_context, ccache, princ); 24981477Smarkm if (krbret != 0) { 25081477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 251106862Snectar PAM_LOG("Error krb5_cc_initialize(): %s", 252106862Snectar krb5_get_err_text(pam_context, krbret)); 25381477Smarkm retval = PAM_SERVICE_ERR; 25481477Smarkm goto cleanup; 25581477Smarkm } 25681477Smarkm krbret = krb5_cc_store_cred(pam_context, ccache, &creds); 25781477Smarkm if (krbret != 0) { 25881477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 259106862Snectar PAM_LOG("Error krb5_cc_store_cred(): %s", 260106862Snectar krb5_get_err_text(pam_context, krbret)); 26181477Smarkm krb5_cc_destroy(pam_context, ccache); 26281477Smarkm retval = PAM_SERVICE_ERR; 26381477Smarkm goto cleanup; 26481477Smarkm } 26581477Smarkm 26681477Smarkm PAM_LOG("Credentials stashed"); 26781477Smarkm 26881477Smarkm /* Verify them */ 26993984Sdes if ((srvdup = strdup(service)) == NULL) { 27093984Sdes retval = PAM_BUF_ERR; 27193984Sdes goto cleanup; 27293984Sdes } 27393984Sdes krbret = verify_krb_v5_tgt(pam_context, ccache, srvdup, 274140667Srwatson openpam_get_option(pamh, PAM_OPT_DEBUG) ? 1 : 0); 27593984Sdes free(srvdup); 27693984Sdes if (krbret == -1) { 27781477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 27881477Smarkm krb5_cc_destroy(pam_context, ccache); 27981477Smarkm retval = PAM_AUTH_ERR; 28081477Smarkm goto cleanup; 28181477Smarkm } 28281477Smarkm 28381477Smarkm PAM_LOG("Credentials stash verified"); 28481477Smarkm 285125650Sdes retval = pam_get_data(pamh, "ccache", &ccache_data); 28681477Smarkm if (retval == PAM_SUCCESS) { 28781477Smarkm krb5_cc_destroy(pam_context, ccache); 28881477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 28981477Smarkm retval = PAM_AUTH_ERR; 29081477Smarkm goto cleanup; 29181477Smarkm } 29281477Smarkm 29381477Smarkm PAM_LOG("Credentials stash not pre-existing"); 29481477Smarkm 295106864Snectar asprintf(&ccache_name, "%s:%s", krb5_cc_get_type(pam_context, 296106864Snectar ccache), krb5_cc_get_name(pam_context, ccache)); 297106864Snectar if (ccache_name == NULL) { 298106864Snectar PAM_VERBOSE_ERROR("Kerberos 5 error"); 299106864Snectar retval = PAM_BUF_ERR; 300106864Snectar goto cleanup; 301106864Snectar } 302106864Snectar retval = pam_set_data(pamh, "ccache", ccache_name, cleanup_cache); 30381477Smarkm if (retval != 0) { 30481477Smarkm krb5_cc_destroy(pam_context, ccache); 30581477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 error"); 30681477Smarkm retval = PAM_SERVICE_ERR; 30781477Smarkm goto cleanup; 30881477Smarkm } 30981477Smarkm 31081477Smarkm PAM_LOG("Credentials stash saved"); 31181477Smarkm 31281477Smarkmcleanup: 31381477Smarkm krb5_free_cred_contents(pam_context, &creds); 31481477Smarkm PAM_LOG("Done cleanup"); 31581477Smarkmcleanup2: 31681477Smarkm krb5_free_principal(pam_context, princ); 31781477Smarkm PAM_LOG("Done cleanup2"); 31881477Smarkmcleanup3: 31981477Smarkm if (princ_name) 32081477Smarkm free(princ_name); 32181477Smarkm 32281477Smarkm krb5_free_context(pam_context); 32381477Smarkm 32481477Smarkm PAM_LOG("Done cleanup3"); 32581477Smarkm 32681477Smarkm if (retval != PAM_SUCCESS) 32781477Smarkm PAM_VERBOSE_ERROR("Kerberos 5 refuses you"); 32881477Smarkm 32994564Sdes return (retval); 33081477Smarkm} 33181477Smarkm 33281477SmarkmPAM_EXTERN int 33394564Sdespam_sm_setcred(pam_handle_t *pamh, int flags, 334115465Sdes int argc __unused, const char *argv[] __unused) 33581477Smarkm{ 336147810Skensmith#ifdef _FREEFALL_CONFIG 337147810Skensmith return (PAM_SUCCESS); 338147810Skensmith#else 33981477Smarkm 34081477Smarkm krb5_error_code krbret; 34181477Smarkm krb5_context pam_context; 34281477Smarkm krb5_principal princ; 34381477Smarkm krb5_creds creds; 34481477Smarkm krb5_ccache ccache_temp, ccache_perm; 34581477Smarkm krb5_cc_cursor cursor; 34681477Smarkm struct passwd *pwd = NULL; 34781477Smarkm int retval; 348123454Sdes const char *cache_name, *q; 349125650Sdes const void *user; 350125650Sdes void *cache_data; 351115465Sdes char *cache_name_buf = NULL, *p; 35281477Smarkm 35381477Smarkm uid_t euid; 35481477Smarkm gid_t egid; 35581477Smarkm 35681477Smarkm if (flags & PAM_DELETE_CRED) 35794564Sdes return (PAM_SUCCESS); 35881477Smarkm 35981477Smarkm if (flags & PAM_REFRESH_CRED) 36094564Sdes return (PAM_SUCCESS); 36181477Smarkm 36281477Smarkm if (flags & PAM_REINITIALIZE_CRED) 36394564Sdes return (PAM_SUCCESS); 36481477Smarkm 36581477Smarkm if (!(flags & PAM_ESTABLISH_CRED)) 36694564Sdes return (PAM_SERVICE_ERR); 36781477Smarkm 368140747Srwatson /* If a persistent cache isn't desired, stop now. */ 369140747Srwatson if (openpam_get_option(pamh, PAM_OPT_NO_CCACHE)) 370140747Srwatson return (PAM_SUCCESS); 371140747Srwatson 37281477Smarkm PAM_LOG("Establishing credentials"); 37381477Smarkm 37481477Smarkm /* Get username */ 375123454Sdes retval = pam_get_item(pamh, PAM_USER, &user); 37681477Smarkm if (retval != PAM_SUCCESS) 37794564Sdes return (retval); 37881477Smarkm 379123454Sdes PAM_LOG("Got user: %s", (const char *)user); 38081477Smarkm 38181477Smarkm krbret = krb5_init_context(&pam_context); 38281477Smarkm if (krbret != 0) { 383106862Snectar PAM_LOG("Error krb5_init_context() failed"); 38494564Sdes return (PAM_SERVICE_ERR); 38581477Smarkm } 38681477Smarkm 38781477Smarkm PAM_LOG("Context initialised"); 38881477Smarkm 38981477Smarkm euid = geteuid(); /* Usually 0 */ 39081477Smarkm egid = getegid(); 39181477Smarkm 39281477Smarkm PAM_LOG("Got euid, egid: %d %d", euid, egid); 39381477Smarkm 394106864Snectar /* Retrieve the temporary cache */ 395123454Sdes retval = pam_get_data(pamh, "ccache", &cache_data); 396110056Snectar if (retval != PAM_SUCCESS) { 397110056Snectar retval = PAM_CRED_UNAVAIL; 39881477Smarkm goto cleanup3; 399110056Snectar } 400123454Sdes krbret = krb5_cc_resolve(pam_context, cache_data, &ccache_temp); 401106864Snectar if (krbret != 0) { 402123454Sdes PAM_LOG("Error krb5_cc_resolve(\"%s\"): %s", (const char *)cache_data, 403106864Snectar krb5_get_err_text(pam_context, krbret)); 404110056Snectar retval = PAM_SERVICE_ERR; 405106864Snectar goto cleanup3; 406106864Snectar } 40781477Smarkm 40881477Smarkm /* Get the uid. This should exist. */ 40981477Smarkm pwd = getpwnam(user); 41081477Smarkm if (pwd == NULL) { 41181477Smarkm retval = PAM_USER_UNKNOWN; 41281477Smarkm goto cleanup3; 41381477Smarkm } 41481477Smarkm 41581477Smarkm PAM_LOG("Done getpwnam()"); 41681477Smarkm 41781477Smarkm /* Avoid following a symlink as root */ 41881477Smarkm if (setegid(pwd->pw_gid)) { 41981477Smarkm retval = PAM_SERVICE_ERR; 42081477Smarkm goto cleanup3; 42181477Smarkm } 42281477Smarkm if (seteuid(pwd->pw_uid)) { 42381477Smarkm retval = PAM_SERVICE_ERR; 42481477Smarkm goto cleanup3; 42581477Smarkm } 42681477Smarkm 42781477Smarkm PAM_LOG("Done setegid() & seteuid()"); 42881477Smarkm 42981477Smarkm /* Get the cache name */ 430115465Sdes cache_name = openpam_get_option(pamh, PAM_OPT_CCACHE); 431115465Sdes if (cache_name == NULL) { 432115465Sdes asprintf(&cache_name_buf, "FILE:/tmp/krb5cc_%d", pwd->pw_uid); 433115465Sdes cache_name = cache_name_buf; 434115465Sdes } 43581477Smarkm 43681477Smarkm p = calloc(PATH_MAX + 16, sizeof(char)); 43781477Smarkm q = cache_name; 43881477Smarkm 43981477Smarkm if (p == NULL) { 44081477Smarkm PAM_LOG("Error malloc(): failure"); 44181477Smarkm retval = PAM_BUF_ERR; 44281477Smarkm goto cleanup3; 44381477Smarkm } 44481477Smarkm cache_name = p; 44581477Smarkm 44681477Smarkm /* convert %u and %p */ 44781477Smarkm while (*q) { 44881477Smarkm if (*q == '%') { 44981477Smarkm q++; 45081477Smarkm if (*q == 'u') { 45181477Smarkm sprintf(p, "%d", pwd->pw_uid); 45281477Smarkm p += strlen(p); 45381477Smarkm } 45481477Smarkm else if (*q == 'p') { 45581477Smarkm sprintf(p, "%d", getpid()); 45681477Smarkm p += strlen(p); 45781477Smarkm } 45881477Smarkm else { 45981477Smarkm /* Not a special token */ 46081477Smarkm *p++ = '%'; 46181477Smarkm q--; 46281477Smarkm } 46381477Smarkm q++; 46481477Smarkm } 46581477Smarkm else { 46681477Smarkm *p++ = *q++; 46781477Smarkm } 46881477Smarkm } 46981477Smarkm 47081477Smarkm PAM_LOG("Got cache_name: %s", cache_name); 47181477Smarkm 47281477Smarkm /* Initialize the new ccache */ 47381477Smarkm krbret = krb5_cc_get_principal(pam_context, ccache_temp, &princ); 47481477Smarkm if (krbret != 0) { 47581477Smarkm PAM_LOG("Error krb5_cc_get_principal(): %s", 476106862Snectar krb5_get_err_text(pam_context, krbret)); 47781477Smarkm retval = PAM_SERVICE_ERR; 47881477Smarkm goto cleanup3; 47981477Smarkm } 48081477Smarkm krbret = krb5_cc_resolve(pam_context, cache_name, &ccache_perm); 48181477Smarkm if (krbret != 0) { 482106862Snectar PAM_LOG("Error krb5_cc_resolve(): %s", 483106862Snectar krb5_get_err_text(pam_context, krbret)); 48481477Smarkm retval = PAM_SERVICE_ERR; 48581477Smarkm goto cleanup2; 48681477Smarkm } 48781477Smarkm krbret = krb5_cc_initialize(pam_context, ccache_perm, princ); 48881477Smarkm if (krbret != 0) { 489106862Snectar PAM_LOG("Error krb5_cc_initialize(): %s", 490106862Snectar krb5_get_err_text(pam_context, krbret)); 49181477Smarkm retval = PAM_SERVICE_ERR; 49281477Smarkm goto cleanup2; 49381477Smarkm } 49481477Smarkm 49581477Smarkm PAM_LOG("Cache initialised"); 49681477Smarkm 49781477Smarkm /* Prepare for iteration over creds */ 49881477Smarkm krbret = krb5_cc_start_seq_get(pam_context, ccache_temp, &cursor); 49981477Smarkm if (krbret != 0) { 500106862Snectar PAM_LOG("Error krb5_cc_start_seq_get(): %s", 501106862Snectar krb5_get_err_text(pam_context, krbret)); 50281477Smarkm krb5_cc_destroy(pam_context, ccache_perm); 50381477Smarkm retval = PAM_SERVICE_ERR; 50481477Smarkm goto cleanup2; 50581477Smarkm } 50681477Smarkm 50781477Smarkm PAM_LOG("Prepared for iteration"); 50881477Smarkm 50981477Smarkm /* Copy the creds (should be two of them) */ 51081477Smarkm while ((krbret = krb5_cc_next_cred(pam_context, ccache_temp, 51181477Smarkm &cursor, &creds) == 0)) { 51281477Smarkm krbret = krb5_cc_store_cred(pam_context, ccache_perm, &creds); 51381477Smarkm if (krbret != 0) { 51481477Smarkm PAM_LOG("Error krb5_cc_store_cred(): %s", 515106862Snectar krb5_get_err_text(pam_context, krbret)); 51681477Smarkm krb5_cc_destroy(pam_context, ccache_perm); 51781477Smarkm krb5_free_cred_contents(pam_context, &creds); 51881477Smarkm retval = PAM_SERVICE_ERR; 51981477Smarkm goto cleanup2; 52081477Smarkm } 52181477Smarkm krb5_free_cred_contents(pam_context, &creds); 52281477Smarkm PAM_LOG("Iteration"); 52381477Smarkm } 52481477Smarkm krb5_cc_end_seq_get(pam_context, ccache_temp, &cursor); 52581477Smarkm 52681477Smarkm PAM_LOG("Done iterating"); 52781477Smarkm 52881477Smarkm if (strstr(cache_name, "FILE:") == cache_name) { 52981477Smarkm if (chown(&cache_name[5], pwd->pw_uid, pwd->pw_gid) == -1) { 53081477Smarkm PAM_LOG("Error chown(): %s", strerror(errno)); 53181477Smarkm krb5_cc_destroy(pam_context, ccache_perm); 53281477Smarkm retval = PAM_SERVICE_ERR; 53381477Smarkm goto cleanup2; 53481477Smarkm } 53581477Smarkm PAM_LOG("Done chown()"); 53681477Smarkm 53781477Smarkm if (chmod(&cache_name[5], (S_IRUSR | S_IWUSR)) == -1) { 53881477Smarkm PAM_LOG("Error chmod(): %s", strerror(errno)); 53981477Smarkm krb5_cc_destroy(pam_context, ccache_perm); 54081477Smarkm retval = PAM_SERVICE_ERR; 54181477Smarkm goto cleanup2; 54281477Smarkm } 54381477Smarkm PAM_LOG("Done chmod()"); 54481477Smarkm } 54581477Smarkm 54681477Smarkm krb5_cc_close(pam_context, ccache_perm); 54781477Smarkm 54881477Smarkm PAM_LOG("Cache closed"); 54981477Smarkm 550115465Sdes retval = pam_setenv(pamh, "KRB5CCNAME", cache_name, 1); 551115465Sdes if (retval != PAM_SUCCESS) { 552115465Sdes PAM_LOG("Error pam_setenv(): %s", pam_strerror(pamh, retval)); 55381477Smarkm krb5_cc_destroy(pam_context, ccache_perm); 55481477Smarkm retval = PAM_SERVICE_ERR; 55581477Smarkm goto cleanup2; 55681477Smarkm } 55781477Smarkm 55881477Smarkm PAM_LOG("Environment done: KRB5CCNAME=%s", cache_name); 55981477Smarkm 56081477Smarkmcleanup2: 56181477Smarkm krb5_free_principal(pam_context, princ); 56281477Smarkm PAM_LOG("Done cleanup2"); 56381477Smarkmcleanup3: 56481477Smarkm krb5_free_context(pam_context); 56581477Smarkm PAM_LOG("Done cleanup3"); 56681477Smarkm 56781477Smarkm seteuid(euid); 56881477Smarkm setegid(egid); 56981477Smarkm 57081477Smarkm PAM_LOG("Done seteuid() & setegid()"); 57194564Sdes 572115465Sdes if (cache_name_buf != NULL) 573115465Sdes free(cache_name_buf); 574115465Sdes 57594564Sdes return (retval); 576147810Skensmith#endif 57781477Smarkm} 57881477Smarkm 57994564Sdes/* 58081477Smarkm * account management 58181477Smarkm */ 58281477SmarkmPAM_EXTERN int 58394564Sdespam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused, 584115465Sdes int argc __unused, const char *argv[] __unused) 58581477Smarkm{ 58681477Smarkm krb5_error_code krbret; 58781477Smarkm krb5_context pam_context; 58881477Smarkm krb5_ccache ccache; 58981477Smarkm krb5_principal princ; 59081477Smarkm int retval; 591125650Sdes const void *user; 592125650Sdes void *ccache_name; 59381477Smarkm 594123454Sdes retval = pam_get_item(pamh, PAM_USER, &user); 59581477Smarkm if (retval != PAM_SUCCESS) 59694564Sdes return (retval); 59781477Smarkm 598123454Sdes PAM_LOG("Got user: %s", (const char *)user); 59981477Smarkm 600123454Sdes retval = pam_get_data(pamh, "ccache", &ccache_name); 601110275Sdes if (retval != PAM_SUCCESS) 602110275Sdes return (PAM_SUCCESS); 603110275Sdes 604110275Sdes PAM_LOG("Got credentials"); 605110275Sdes 60681477Smarkm krbret = krb5_init_context(&pam_context); 60781477Smarkm if (krbret != 0) { 608106862Snectar PAM_LOG("Error krb5_init_context() failed"); 60994564Sdes return (PAM_PERM_DENIED); 61081477Smarkm } 61181477Smarkm 61281477Smarkm PAM_LOG("Context initialised"); 61381477Smarkm 614123454Sdes krbret = krb5_cc_resolve(pam_context, (const char *)ccache_name, &ccache); 615106864Snectar if (krbret != 0) { 616123454Sdes PAM_LOG("Error krb5_cc_resolve(\"%s\"): %s", (const char *)ccache_name, 617106864Snectar krb5_get_err_text(pam_context, krbret)); 618106864Snectar krb5_free_context(pam_context); 619106864Snectar return (PAM_PERM_DENIED); 620106864Snectar } 621106864Snectar 622123454Sdes PAM_LOG("Got ccache %s", (const char *)ccache_name); 623106864Snectar 624106864Snectar 62581477Smarkm krbret = krb5_cc_get_principal(pam_context, ccache, &princ); 62681477Smarkm if (krbret != 0) { 627106862Snectar PAM_LOG("Error krb5_cc_get_principal(): %s", 628106862Snectar krb5_get_err_text(pam_context, krbret)); 62981477Smarkm retval = PAM_PERM_DENIED;; 63081477Smarkm goto cleanup; 63181477Smarkm } 63281477Smarkm 63381477Smarkm PAM_LOG("Got principal"); 63481477Smarkm 635123454Sdes if (krb5_kuserok(pam_context, princ, (const char *)user)) 63681477Smarkm retval = PAM_SUCCESS; 63781477Smarkm else 63881477Smarkm retval = PAM_PERM_DENIED; 63981477Smarkm krb5_free_principal(pam_context, princ); 64081477Smarkm 64181477Smarkm PAM_LOG("Done kuserok()"); 64281477Smarkm 64381477Smarkmcleanup: 64481477Smarkm krb5_free_context(pam_context); 64581477Smarkm PAM_LOG("Done cleanup"); 64681477Smarkm 64794564Sdes return (retval); 64881477Smarkm 64981477Smarkm} 65081477Smarkm 65194564Sdes/* 65281477Smarkm * password management 65381477Smarkm */ 65481477SmarkmPAM_EXTERN int 65594564Sdespam_sm_chauthtok(pam_handle_t *pamh, int flags, 656115465Sdes int argc __unused, const char *argv[] __unused) 65781477Smarkm{ 65881477Smarkm krb5_error_code krbret; 65981477Smarkm krb5_context pam_context; 66081477Smarkm krb5_creds creds; 66181477Smarkm krb5_principal princ; 66281477Smarkm krb5_get_init_creds_opt opts; 66381477Smarkm krb5_data result_code_string, result_string; 66481477Smarkm int result_code, retval; 665123454Sdes const char *pass; 666123454Sdes const void *user; 66793984Sdes char *princ_name, *passdup; 66881477Smarkm 66981477Smarkm if (!(flags & PAM_UPDATE_AUTHTOK)) 67094564Sdes return (PAM_AUTHTOK_ERR); 67181477Smarkm 672123454Sdes retval = pam_get_item(pamh, PAM_USER, &user); 67381477Smarkm if (retval != PAM_SUCCESS) 67494564Sdes return (retval); 67581477Smarkm 676123454Sdes PAM_LOG("Got user: %s", (const char *)user); 67781477Smarkm 67881477Smarkm krbret = krb5_init_context(&pam_context); 67981477Smarkm if (krbret != 0) { 680106862Snectar PAM_LOG("Error krb5_init_context() failed"); 68194564Sdes return (PAM_SERVICE_ERR); 68281477Smarkm } 68381477Smarkm 68481477Smarkm PAM_LOG("Context initialised"); 68581477Smarkm 68681477Smarkm krb5_get_init_creds_opt_init(&opts); 68781477Smarkm 68881477Smarkm PAM_LOG("Credentials options initialised"); 68981477Smarkm 69081477Smarkm /* Get principal name */ 691123454Sdes krbret = krb5_parse_name(pam_context, (const char *)user, &princ); 69281477Smarkm if (krbret != 0) { 693106862Snectar PAM_LOG("Error krb5_parse_name(): %s", 694106862Snectar krb5_get_err_text(pam_context, krbret)); 69581477Smarkm retval = PAM_USER_UNKNOWN; 69681477Smarkm goto cleanup3; 69781477Smarkm } 69881477Smarkm 69981477Smarkm /* Now convert the principal name into something human readable */ 70081477Smarkm princ_name = NULL; 70181477Smarkm krbret = krb5_unparse_name(pam_context, princ, &princ_name); 70281477Smarkm if (krbret != 0) { 703106862Snectar PAM_LOG("Error krb5_unparse_name(): %s", 704106862Snectar krb5_get_err_text(pam_context, krbret)); 70581477Smarkm retval = PAM_SERVICE_ERR; 70681477Smarkm goto cleanup2; 70781477Smarkm } 70881477Smarkm 70981477Smarkm PAM_LOG("Got principal: %s", princ_name); 71081477Smarkm 71181477Smarkm /* Get password */ 71293984Sdes retval = pam_get_authtok(pamh, PAM_OLDAUTHTOK, &pass, PASSWORD_PROMPT); 71381477Smarkm if (retval != PAM_SUCCESS) 71481477Smarkm goto cleanup2; 71581477Smarkm 71681477Smarkm PAM_LOG("Got password"); 71781477Smarkm 71881477Smarkm memset(&creds, 0, sizeof(krb5_creds)); 71981477Smarkm krbret = krb5_get_init_creds_password(pam_context, &creds, princ, 72081477Smarkm pass, NULL, pamh, 0, "kadmin/changepw", &opts); 72181477Smarkm if (krbret != 0) { 722125650Sdes PAM_LOG("Error krb5_get_init_creds_password(): %s", 723106862Snectar krb5_get_err_text(pam_context, krbret)); 72481477Smarkm retval = PAM_AUTH_ERR; 72581477Smarkm goto cleanup2; 72681477Smarkm } 72781477Smarkm 72881477Smarkm PAM_LOG("Credentials established"); 72981477Smarkm 73081477Smarkm /* Now get the new password */ 73193984Sdes for (;;) { 73293984Sdes retval = pam_get_authtok(pamh, 73393984Sdes PAM_AUTHTOK, &pass, NEW_PASSWORD_PROMPT); 73493984Sdes if (retval != PAM_TRY_AGAIN) 73593984Sdes break; 73693984Sdes pam_error(pamh, "Mismatch; try again, EOF to quit."); 73793984Sdes } 73881477Smarkm if (retval != PAM_SUCCESS) 73981477Smarkm goto cleanup; 74081477Smarkm 74193984Sdes PAM_LOG("Got new password"); 74281477Smarkm 74393984Sdes /* Change it */ 74493984Sdes if ((passdup = strdup(pass)) == NULL) { 74593984Sdes retval = PAM_BUF_ERR; 74681477Smarkm goto cleanup; 74781477Smarkm } 74893984Sdes krbret = krb5_change_password(pam_context, &creds, passdup, 74981477Smarkm &result_code, &result_code_string, &result_string); 75093984Sdes free(passdup); 75181477Smarkm if (krbret != 0) { 75281477Smarkm PAM_LOG("Error krb5_change_password(): %s", 753106862Snectar krb5_get_err_text(pam_context, krbret)); 75481477Smarkm retval = PAM_AUTHTOK_ERR; 75581477Smarkm goto cleanup; 75681477Smarkm } 75781477Smarkm if (result_code) { 75881477Smarkm PAM_LOG("Error krb5_change_password(): (result_code)"); 75981477Smarkm retval = PAM_AUTHTOK_ERR; 76081477Smarkm goto cleanup; 76181477Smarkm } 76281477Smarkm 76381477Smarkm PAM_LOG("Password changed"); 76481477Smarkm 76581477Smarkm if (result_string.data) 76681477Smarkm free(result_string.data); 76781477Smarkm if (result_code_string.data) 76881477Smarkm free(result_code_string.data); 76981477Smarkm 77081477Smarkmcleanup: 77181477Smarkm krb5_free_cred_contents(pam_context, &creds); 77281477Smarkm PAM_LOG("Done cleanup"); 77381477Smarkmcleanup2: 77481477Smarkm krb5_free_principal(pam_context, princ); 77581477Smarkm PAM_LOG("Done cleanup2"); 77681477Smarkmcleanup3: 77781477Smarkm if (princ_name) 77881477Smarkm free(princ_name); 77981477Smarkm 78081477Smarkm krb5_free_context(pam_context); 78181477Smarkm 78281477Smarkm PAM_LOG("Done cleanup3"); 78381477Smarkm 78494564Sdes return (retval); 78581477Smarkm} 78681477Smarkm 78781477SmarkmPAM_MODULE_ENTRY("pam_krb5"); 78881477Smarkm 78981477Smarkm/* 79081477Smarkm * This routine with some modification is from the MIT V5B6 appl/bsd/login.c 79181477Smarkm * Modified by Sam Hartman <hartmans@mit.edu> to support PAM services 79281477Smarkm * for Debian. 79381477Smarkm * 79481477Smarkm * Verify the Kerberos ticket-granting ticket just retrieved for the 79581477Smarkm * user. If the Kerberos server doesn't respond, assume the user is 79681477Smarkm * trying to fake us out (since we DID just get a TGT from what is 79781477Smarkm * supposedly our KDC). If the host/<host> service is unknown (i.e., 79881477Smarkm * the local keytab doesn't have it), and we cannot find another 79981477Smarkm * service we do have, let her in. 80081477Smarkm * 80181477Smarkm * Returns 1 for confirmation, -1 for failure, 0 for uncertainty. 80281477Smarkm */ 803111985Smarkm/* ARGSUSED */ 80481477Smarkmstatic int 80581477Smarkmverify_krb_v5_tgt(krb5_context context, krb5_ccache ccache, 80681477Smarkm char *pam_service, int debug) 80781477Smarkm{ 80881477Smarkm krb5_error_code retval; 80981477Smarkm krb5_principal princ; 81081477Smarkm krb5_keyblock *keyblock; 81181477Smarkm krb5_data packet; 81281477Smarkm krb5_auth_context auth_context; 81389760Smarkm char phost[BUFSIZ]; 81489760Smarkm const char *services[3], **service; 81581477Smarkm 81681477Smarkm packet.data = 0; 81781477Smarkm 81881477Smarkm /* If possible we want to try and verify the ticket we have 81981477Smarkm * received against a keytab. We will try multiple service 82081477Smarkm * principals, including at least the host principal and the PAM 82181477Smarkm * service principal. The host principal is preferred because access 82281477Smarkm * to that key is generally sufficient to compromise root, while the 82381477Smarkm * service key for this PAM service may be less carefully guarded. 82481477Smarkm * It is important to check the keytab first before the KDC so we do 82581477Smarkm * not get spoofed by a fake KDC. 82681477Smarkm */ 82781477Smarkm services[0] = "host"; 82881477Smarkm services[1] = pam_service; 82981477Smarkm services[2] = NULL; 83081477Smarkm keyblock = 0; 83181477Smarkm retval = -1; 83281477Smarkm for (service = &services[0]; *service != NULL; service++) { 83381477Smarkm retval = krb5_sname_to_principal(context, NULL, *service, 83481477Smarkm KRB5_NT_SRV_HST, &princ); 83581477Smarkm if (retval != 0) { 83681477Smarkm if (debug) 837106862Snectar syslog(LOG_DEBUG, 838106862Snectar "pam_krb5: verify_krb_v5_tgt(): %s: %s", 839106862Snectar "krb5_sname_to_principal()", 840106862Snectar krb5_get_err_text(context, retval)); 84181477Smarkm return -1; 84281477Smarkm } 84381477Smarkm 84481477Smarkm /* Extract the name directly. */ 84581477Smarkm strncpy(phost, compat_princ_component(context, princ, 1), 84681477Smarkm BUFSIZ); 84781477Smarkm phost[BUFSIZ - 1] = '\0'; 84881477Smarkm 84981477Smarkm /* 85094564Sdes * Do we have service/<host> keys? 85194564Sdes * (use default/configured keytab, kvno IGNORE_VNO to get the 85294564Sdes * first match, and ignore enctype.) 85394564Sdes */ 85481477Smarkm retval = krb5_kt_read_service_key(context, NULL, princ, 0, 0, 85581477Smarkm &keyblock); 85681477Smarkm if (retval != 0) 85781477Smarkm continue; 85881477Smarkm break; 85981477Smarkm } 86081477Smarkm if (retval != 0) { /* failed to find key */ 86181477Smarkm /* Keytab or service key does not exist */ 86281477Smarkm if (debug) 863106862Snectar syslog(LOG_DEBUG, 864106862Snectar "pam_krb5: verify_krb_v5_tgt(): %s: %s", 865106862Snectar "krb5_kt_read_service_key()", 866106862Snectar krb5_get_err_text(context, retval)); 86781477Smarkm retval = 0; 86881477Smarkm goto cleanup; 86981477Smarkm } 87081477Smarkm if (keyblock) 87181477Smarkm krb5_free_keyblock(context, keyblock); 87281477Smarkm 87381477Smarkm /* Talk to the kdc and construct the ticket. */ 87481477Smarkm auth_context = NULL; 87581477Smarkm retval = krb5_mk_req(context, &auth_context, 0, *service, phost, 87681477Smarkm NULL, ccache, &packet); 87781477Smarkm if (auth_context) { 87881477Smarkm krb5_auth_con_free(context, auth_context); 87981477Smarkm auth_context = NULL; /* setup for rd_req */ 88081477Smarkm } 88181477Smarkm if (retval) { 88281477Smarkm if (debug) 883106862Snectar syslog(LOG_DEBUG, 884106862Snectar "pam_krb5: verify_krb_v5_tgt(): %s: %s", 885106862Snectar "krb5_mk_req()", 886106862Snectar krb5_get_err_text(context, retval)); 88781477Smarkm retval = -1; 88881477Smarkm goto cleanup; 88981477Smarkm } 89081477Smarkm 89181477Smarkm /* Try to use the ticket. */ 89281477Smarkm retval = krb5_rd_req(context, &auth_context, &packet, princ, NULL, 89381477Smarkm NULL, NULL); 89481477Smarkm if (retval) { 89581477Smarkm if (debug) 896106862Snectar syslog(LOG_DEBUG, 897106862Snectar "pam_krb5: verify_krb_v5_tgt(): %s: %s", 898106862Snectar "krb5_rd_req()", 899106862Snectar krb5_get_err_text(context, retval)); 90081477Smarkm retval = -1; 90181477Smarkm } 90281477Smarkm else 90381477Smarkm retval = 1; 90481477Smarkm 90581477Smarkmcleanup: 90681477Smarkm if (packet.data) 90781477Smarkm compat_free_data_contents(context, &packet); 90881477Smarkm krb5_free_principal(context, princ); 90981477Smarkm return retval; 91081477Smarkm} 91181477Smarkm 91281477Smarkm/* Free the memory for cache_name. Called by pam_end() */ 913111985Smarkm/* ARGSUSED */ 91481477Smarkmstatic void 91589760Smarkmcleanup_cache(pam_handle_t *pamh __unused, void *data, int pam_end_status __unused) 91681477Smarkm{ 91781477Smarkm krb5_context pam_context; 91881477Smarkm krb5_ccache ccache; 919106864Snectar krb5_error_code krbret; 92081477Smarkm 92181477Smarkm if (krb5_init_context(&pam_context)) 92281477Smarkm return; 92381477Smarkm 924106864Snectar krbret = krb5_cc_resolve(pam_context, data, &ccache); 925106864Snectar if (krbret == 0) 926106864Snectar krb5_cc_destroy(pam_context, ccache); 92781477Smarkm krb5_free_context(pam_context); 928106864Snectar free(data); 92981477Smarkm} 93081477Smarkm 93181477Smarkm#ifdef COMPAT_HEIMDAL 93281477Smarkm#ifdef COMPAT_MIT 93381477Smarkm#error This cannot be MIT and Heimdal compatible! 93481477Smarkm#endif 93581477Smarkm#endif 93681477Smarkm 93781477Smarkm#ifndef COMPAT_HEIMDAL 93881477Smarkm#ifndef COMPAT_MIT 93981477Smarkm#error One of COMPAT_MIT and COMPAT_HEIMDAL must be specified! 94081477Smarkm#endif 94181477Smarkm#endif 94281477Smarkm 94381477Smarkm#ifdef COMPAT_HEIMDAL 944111985Smarkm/* ARGSUSED */ 94581477Smarkmstatic const char * 94689760Smarkmcompat_princ_component(krb5_context context __unused, krb5_principal princ, int n) 94781477Smarkm{ 94881477Smarkm return princ->name.name_string.val[n]; 94981477Smarkm} 95081477Smarkm 951111985Smarkm/* ARGSUSED */ 95281477Smarkmstatic void 95389760Smarkmcompat_free_data_contents(krb5_context context __unused, krb5_data * data) 95481477Smarkm{ 95581477Smarkm krb5_xfree(data->data); 95681477Smarkm} 95781477Smarkm#endif 95881477Smarkm 95981477Smarkm#ifdef COMPAT_MIT 96081477Smarkmstatic const char * 96181477Smarkmcompat_princ_component(krb5_context context, krb5_principal princ, int n) 96281477Smarkm{ 96381477Smarkm return krb5_princ_component(context, princ, n)->data; 96481477Smarkm} 96581477Smarkm 96681477Smarkmstatic void 96781477Smarkmcompat_free_data_contents(krb5_context context, krb5_data * data) 96881477Smarkm{ 96981477Smarkm krb5_free_data_contents(context, data); 97081477Smarkm} 97181477Smarkm#endif 972