verify_user.c revision 102644
1169689Skan/* 290075Sobrien * Copyright (c) 1997-2002 Kungliga Tekniska H�gskolan 390075Sobrien * (Royal Institute of Technology, Stockholm, Sweden). 4169689Skan * All rights reserved. 590075Sobrien * 6169689Skan * Redistribution and use in source and binary forms, with or without 7169689Skan * modification, are permitted provided that the following conditions 8169689Skan * are met: 9169689Skan * 10169689Skan * 1. Redistributions of source code must retain the above copyright 11169689Skan * notice, this list of conditions and the following disclaimer. 1290075Sobrien * 13169689Skan * 2. Redistributions in binary form must reproduce the above copyright 14169689Skan * notice, this list of conditions and the following disclaimer in the 1590075Sobrien * documentation and/or other materials provided with the distribution. 16169689Skan * 17169689Skan * 3. Neither the name of the Institute nor the names of its contributors 18169689Skan * may be used to endorse or promote products derived from this software 19169689Skan * without specific prior written permission. 2090075Sobrien * 21169689Skan * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22169689Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23169689Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24169689Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25169689Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26169689Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27169689Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28117395Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29117395Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3090075Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3190075Sobrien * SUCH DAMAGE. 3290075Sobrien */ 3390075Sobrien 3490075Sobrien#include "krb5_locl.h" 3590075Sobrien 3690075SobrienRCSID("$Id: verify_user.c,v 1.17 2002/08/20 14:48:31 joda Exp $"); 3790075Sobrien 3890075Sobrienstatic krb5_error_code 3990075Sobrienverify_common (krb5_context context, 4090075Sobrien krb5_principal principal, 4190075Sobrien krb5_ccache ccache, 4290075Sobrien krb5_keytab keytab, 4390075Sobrien krb5_boolean secure, 4490075Sobrien const char *service, 45132718Skan krb5_creds cred) 46132718Skan{ 4790075Sobrien krb5_error_code ret; 48132718Skan krb5_principal server; 4990075Sobrien krb5_verify_init_creds_opt vopt; 5090075Sobrien krb5_ccache id; 51132718Skan 52132718Skan ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST, 53132718Skan &server); 5490075Sobrien if(ret) 5590075Sobrien return ret; 5690075Sobrien 57132718Skan krb5_verify_init_creds_opt_init(&vopt); 5890075Sobrien krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure); 5990075Sobrien 60132718Skan ret = krb5_verify_init_creds(context, 6190075Sobrien &cred, 62132718Skan server, 6390075Sobrien keytab, 64132718Skan NULL, 6590075Sobrien &vopt); 6690075Sobrien krb5_free_principal(context, server); 67117395Skan if(ret) 68117395Skan return ret; 69132718Skan if(ccache == NULL) 70117395Skan ret = krb5_cc_default (context, &id); 71117395Skan else 72132718Skan id = ccache; 73117395Skan if(ret == 0){ 74117395Skan ret = krb5_cc_initialize(context, id, principal); 75117395Skan if(ret == 0){ 76117395Skan ret = krb5_cc_store_cred(context, id, &cred); 7790075Sobrien } 7890075Sobrien if(ccache == NULL) 7990075Sobrien krb5_cc_close(context, id); 8090075Sobrien } 8190075Sobrien krb5_free_creds_contents(context, &cred); 8290075Sobrien return ret; 8390075Sobrien} 8490075Sobrien 8590075Sobrien/* 8690075Sobrien * Verify user `principal' with `password'. 8790075Sobrien * 8890075Sobrien * If `secure', also verify against local service key for `service'. 8990075Sobrien * 9090075Sobrien * As a side effect, fresh tickets are obtained and stored in `ccache'. 9190075Sobrien */ 92132718Skan 9390075Sobrienvoid 9490075Sobrienkrb5_verify_opt_init(krb5_verify_opt *opt) 9590075Sobrien{ 9690075Sobrien memset(opt, 0, sizeof(*opt)); 9790075Sobrien opt->secure = TRUE; 9890075Sobrien opt->service = "host"; 9990075Sobrien} 10090075Sobrien 101132718Skanvoid 10290075Sobrienkrb5_verify_opt_set_ccache(krb5_verify_opt *opt, krb5_ccache ccache) 10390075Sobrien{ 10490075Sobrien opt->ccache = ccache; 10590075Sobrien} 10690075Sobrien 10790075Sobrienvoid 10890075Sobrienkrb5_verify_opt_set_keytab(krb5_verify_opt *opt, krb5_keytab keytab) 10990075Sobrien{ 110132718Skan opt->keytab = keytab; 11190075Sobrien} 11290075Sobrien 11390075Sobrienvoid 11490075Sobrienkrb5_verify_opt_set_secure(krb5_verify_opt *opt, krb5_boolean secure) 11590075Sobrien{ 11690075Sobrien opt->secure = secure; 11790075Sobrien} 11890075Sobrien 119132718Skanvoid 12090075Sobrienkrb5_verify_opt_set_service(krb5_verify_opt *opt, const char *service) 12190075Sobrien{ 12290075Sobrien opt->service = service; 123117395Skan} 12490075Sobrien 12590075Sobrienvoid 126132718Skankrb5_verify_opt_set_flags(krb5_verify_opt *opt, unsigned int flags) 127132718Skan{ 12890075Sobrien opt->flags |= flags; 129132718Skan} 13090075Sobrien 131132718Skanstatic krb5_error_code 132132718Skanverify_user_opt_int(krb5_context context, 133132718Skan krb5_principal principal, 134132718Skan const char *password, 135132718Skan krb5_verify_opt *vopt) 136132718Skan 137132718Skan{ 138132718Skan krb5_error_code ret; 139132718Skan krb5_get_init_creds_opt opt; 140132718Skan krb5_creds cred; 14190075Sobrien 14290075Sobrien krb5_get_init_creds_opt_init (&opt); 14390075Sobrien krb5_get_init_creds_opt_set_default_flags(context, NULL, 14490075Sobrien *krb5_princ_realm(context, principal), 14590075Sobrien &opt); 146132718Skan ret = krb5_get_init_creds_password (context, 147132718Skan &cred, 148132718Skan principal, 149132718Skan password, 150132718Skan krb5_prompter_posix, 151132718Skan NULL, 152132718Skan 0, 153132718Skan NULL, 154132718Skan &opt); 155132718Skan if(ret) 156132718Skan return ret; 157132718Skan#define OPT(V, D) ((vopt && (vopt->V)) ? (vopt->V) : (D)) 158132718Skan return verify_common (context, principal, OPT(ccache, NULL), 159132718Skan OPT(keytab, NULL), vopt ? vopt->secure : TRUE, 160132718Skan OPT(service, "host"), cred); 161132718Skan#undef OPT 162132718Skan} 163132718Skan 164132718Skankrb5_error_code 165132718Skankrb5_verify_user_opt(krb5_context context, 166132718Skan krb5_principal principal, 167132718Skan const char *password, 168132718Skan krb5_verify_opt *opt) 169132718Skan{ 170132718Skan krb5_error_code ret; 171132718Skan 172132718Skan if(opt && (opt->flags & KRB5_VERIFY_LREALMS)) { 173132718Skan krb5_realm *realms, *r; 174132718Skan ret = krb5_get_default_realms (context, &realms); 175132718Skan if (ret) 176132718Skan return ret; 17790075Sobrien ret = KRB5_CONFIG_NODEFREALM; 17890075Sobrien 17990075Sobrien for (r = realms; *r != NULL && ret != 0; ++r) { 18090075Sobrien char *tmp = strdup (*r); 18190075Sobrien 18290075Sobrien if (tmp == NULL) { 18390075Sobrien krb5_free_host_realm (context, realms); 184132718Skan krb5_set_error_string (context, "malloc: out of memory"); 185132718Skan return ENOMEM; 186132718Skan } 187132718Skan free (*krb5_princ_realm (context, principal)); 188132718Skan krb5_princ_set_realm (context, principal, &tmp); 18990075Sobrien 190132718Skan ret = verify_user_opt_int(context, principal, password, opt); 191132718Skan } 192132718Skan krb5_free_host_realm (context, realms); 193132718Skan if(ret) 194132718Skan return ret; 195132718Skan } else 196132718Skan ret = verify_user_opt_int(context, principal, password, opt); 197132718Skan return ret; 198132718Skan} 199132718Skan 200132718Skan/* compat function that calls above */ 201132718Skan 202132718Skankrb5_error_code 203132718Skankrb5_verify_user(krb5_context context, 204132718Skan krb5_principal principal, 205132718Skan krb5_ccache ccache, 206132718Skan const char *password, 207132718Skan krb5_boolean secure, 208132718Skan const char *service) 209132718Skan{ 210132718Skan krb5_verify_opt opt; 211132718Skan 21290075Sobrien krb5_verify_opt_init(&opt); 213132718Skan 214132718Skan krb5_verify_opt_set_ccache(&opt, ccache); 215132718Skan krb5_verify_opt_set_secure(&opt, secure); 216132718Skan krb5_verify_opt_set_service(&opt, service); 217132718Skan 21890075Sobrien return krb5_verify_user_opt(context, principal, password, &opt); 219132718Skan} 220132718Skan 221132718Skan/* 222132718Skan * A variant of `krb5_verify_user'. The realm of `principal' is 223132718Skan * ignored and all the local realms are tried. 224132718Skan */ 225132718Skan 226132718Skankrb5_error_code 227132718Skankrb5_verify_user_lrealm(krb5_context context, 228132718Skan krb5_principal principal, 229132718Skan krb5_ccache ccache, 230132718Skan const char *password, 231132718Skan krb5_boolean secure, 232132718Skan const char *service) 233132718Skan{ 234132718Skan krb5_verify_opt opt; 235132718Skan 236132718Skan krb5_verify_opt_init(&opt); 237132718Skan 238132718Skan krb5_verify_opt_set_ccache(&opt, ccache); 239132718Skan krb5_verify_opt_set_secure(&opt, secure); 240132718Skan krb5_verify_opt_set_service(&opt, service); 241132718Skan krb5_verify_opt_set_flags(&opt, KRB5_VERIFY_LREALMS); 242132718Skan 243132718Skan return krb5_verify_user_opt(context, principal, password, &opt); 244132718Skan} 245132718Skan