verify_user.c revision 272461
1331722Seadler/* 2284741Sdavidcs * Copyright (c) 1997-2004 Kungliga Tekniska H��gskolan 3250661Sdavidcs * (Royal Institute of Technology, Stockholm, Sweden). 4250661Sdavidcs * All rights reserved. 5250661Sdavidcs * 6250661Sdavidcs * Redistribution and use in source and binary forms, with or without 7250661Sdavidcs * modification, are permitted provided that the following conditions 8250661Sdavidcs * are met: 9250661Sdavidcs * 10250661Sdavidcs * 1. Redistributions of source code must retain the above copyright 11250661Sdavidcs * notice, this list of conditions and the following disclaimer. 12250661Sdavidcs * 13250661Sdavidcs * 2. Redistributions in binary form must reproduce the above copyright 14250661Sdavidcs * notice, this list of conditions and the following disclaimer in the 15250661Sdavidcs * documentation and/or other materials provided with the distribution. 16250661Sdavidcs * 17250661Sdavidcs * 3. Neither the name of the Institute nor the names of its contributors 18250661Sdavidcs * may be used to endorse or promote products derived from this software 19250661Sdavidcs * without specific prior written permission. 20250661Sdavidcs * 21250661Sdavidcs * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22250661Sdavidcs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23250661Sdavidcs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24250661Sdavidcs * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25250661Sdavidcs * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26250661Sdavidcs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27250661Sdavidcs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28250661Sdavidcs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29250661Sdavidcs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30250661Sdavidcs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31250661Sdavidcs * SUCH DAMAGE. 32250661Sdavidcs */ 33250661Sdavidcs 34250661Sdavidcs#include "krb5_locl.h" 35250661Sdavidcs 36250661Sdavidcsstatic krb5_error_code 37250661Sdavidcsverify_common (krb5_context context, 38250661Sdavidcs krb5_principal principal, 39250661Sdavidcs krb5_ccache ccache, 40250661Sdavidcs krb5_keytab keytab, 41250661Sdavidcs krb5_boolean secure, 42313070Sdavidcs const char *service, 43250661Sdavidcs krb5_creds cred) 44250661Sdavidcs{ 45250661Sdavidcs krb5_error_code ret; 46250661Sdavidcs krb5_principal server; 47250661Sdavidcs krb5_verify_init_creds_opt vopt; 48250661Sdavidcs krb5_ccache id; 49250661Sdavidcs 50330555Sdavidcs ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST, 51250661Sdavidcs &server); 52250661Sdavidcs if(ret) 53250661Sdavidcs return ret; 54250661Sdavidcs 55250661Sdavidcs krb5_verify_init_creds_opt_init(&vopt); 56250661Sdavidcs krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure); 57250661Sdavidcs 58250661Sdavidcs ret = krb5_verify_init_creds(context, 59284741Sdavidcs &cred, 60284741Sdavidcs server, 61284741Sdavidcs keytab, 62250661Sdavidcs NULL, 63250661Sdavidcs &vopt); 64250661Sdavidcs krb5_free_principal(context, server); 65250661Sdavidcs if(ret) 66250661Sdavidcs return ret; 67284741Sdavidcs if(ccache == NULL) 68250661Sdavidcs ret = krb5_cc_default (context, &id); 69284741Sdavidcs else 70250661Sdavidcs id = ccache; 71313070Sdavidcs if(ret == 0){ 72250661Sdavidcs ret = krb5_cc_initialize(context, id, principal); 73250661Sdavidcs if(ret == 0){ 74250661Sdavidcs ret = krb5_cc_store_cred(context, id, &cred); 75250661Sdavidcs } 76284741Sdavidcs if(ccache == NULL) 77284741Sdavidcs krb5_cc_close(context, id); 78284741Sdavidcs } 79324324Sdavidcs krb5_free_cred_contents(context, &cred); 80284741Sdavidcs return ret; 81313070Sdavidcs} 82250661Sdavidcs 83305487Sdavidcs/* 84250661Sdavidcs * Verify user `principal' with `password'. 85250661Sdavidcs * 86250661Sdavidcs * If `secure', also verify against local service key for `service'. 87250661Sdavidcs * 88250661Sdavidcs * As a side effect, fresh tickets are obtained and stored in `ccache'. 89250661Sdavidcs */ 90250661Sdavidcs 91250661SdavidcsKRB5_LIB_FUNCTION void KRB5_LIB_CALL 92250661Sdavidcskrb5_verify_opt_init(krb5_verify_opt *opt) 93250661Sdavidcs{ 94250661Sdavidcs memset(opt, 0, sizeof(*opt)); 95250661Sdavidcs opt->secure = TRUE; 96250661Sdavidcs opt->service = "host"; 97250661Sdavidcs} 98250661Sdavidcs 99250661SdavidcsKRB5_LIB_FUNCTION int KRB5_LIB_CALL 100250661Sdavidcskrb5_verify_opt_alloc(krb5_context context, krb5_verify_opt **opt) 101250661Sdavidcs{ 102250661Sdavidcs *opt = calloc(1, sizeof(**opt)); 103250661Sdavidcs if ((*opt) == NULL) { 104250661Sdavidcs krb5_set_error_message(context, ENOMEM, 105250661Sdavidcs N_("malloc: out of memory", "")); 106250661Sdavidcs return ENOMEM; 107284741Sdavidcs } 108284741Sdavidcs krb5_verify_opt_init(*opt); 109284741Sdavidcs return 0; 110284741Sdavidcs} 111284741Sdavidcs 112284741SdavidcsKRB5_LIB_FUNCTION void KRB5_LIB_CALL 113284741Sdavidcskrb5_verify_opt_free(krb5_verify_opt *opt) 114284741Sdavidcs{ 115284741Sdavidcs free(opt); 116324762Sdavidcs} 117324762Sdavidcs 118324762SdavidcsKRB5_LIB_FUNCTION void KRB5_LIB_CALL 119330555Sdavidcskrb5_verify_opt_set_ccache(krb5_verify_opt *opt, krb5_ccache ccache) 120330555Sdavidcs{ 121330555Sdavidcs opt->ccache = ccache; 122330555Sdavidcs} 123330555Sdavidcs 124324762SdavidcsKRB5_LIB_FUNCTION void KRB5_LIB_CALL 125330555Sdavidcskrb5_verify_opt_set_keytab(krb5_verify_opt *opt, krb5_keytab keytab) 126250661Sdavidcs{ 127 opt->keytab = keytab; 128} 129 130KRB5_LIB_FUNCTION void KRB5_LIB_CALL 131krb5_verify_opt_set_secure(krb5_verify_opt *opt, krb5_boolean secure) 132{ 133 opt->secure = secure; 134} 135 136KRB5_LIB_FUNCTION void KRB5_LIB_CALL 137krb5_verify_opt_set_service(krb5_verify_opt *opt, const char *service) 138{ 139 opt->service = service; 140} 141 142KRB5_LIB_FUNCTION void KRB5_LIB_CALL 143krb5_verify_opt_set_flags(krb5_verify_opt *opt, unsigned int flags) 144{ 145 opt->flags |= flags; 146} 147 148static krb5_error_code 149verify_user_opt_int(krb5_context context, 150 krb5_principal principal, 151 const char *password, 152 krb5_verify_opt *vopt) 153 154{ 155 krb5_error_code ret; 156 krb5_get_init_creds_opt *opt; 157 krb5_creds cred; 158 159 ret = krb5_get_init_creds_opt_alloc (context, &opt); 160 if (ret) 161 return ret; 162 krb5_get_init_creds_opt_set_default_flags(context, NULL, 163 krb5_principal_get_realm(context, principal), 164 opt); 165 ret = krb5_get_init_creds_password (context, 166 &cred, 167 principal, 168 password, 169 krb5_prompter_posix, 170 NULL, 171 0, 172 NULL, 173 opt); 174 krb5_get_init_creds_opt_free(context, opt); 175 if(ret) 176 return ret; 177#define OPT(V, D) ((vopt && (vopt->V)) ? (vopt->V) : (D)) 178 return verify_common (context, principal, OPT(ccache, NULL), 179 OPT(keytab, NULL), vopt ? vopt->secure : TRUE, 180 OPT(service, "host"), cred); 181#undef OPT 182} 183 184KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 185krb5_verify_user_opt(krb5_context context, 186 krb5_principal principal, 187 const char *password, 188 krb5_verify_opt *opt) 189{ 190 krb5_error_code ret; 191 192 if(opt && (opt->flags & KRB5_VERIFY_LREALMS)) { 193 krb5_realm *realms, *r; 194 ret = krb5_get_default_realms (context, &realms); 195 if (ret) 196 return ret; 197 ret = KRB5_CONFIG_NODEFREALM; 198 199 for (r = realms; *r != NULL && ret != 0; ++r) { 200 ret = krb5_principal_set_realm(context, principal, *r); 201 if (ret) { 202 krb5_free_host_realm (context, realms); 203 return ret; 204 } 205 206 ret = verify_user_opt_int(context, principal, password, opt); 207 } 208 krb5_free_host_realm (context, realms); 209 if(ret) 210 return ret; 211 } else 212 ret = verify_user_opt_int(context, principal, password, opt); 213 return ret; 214} 215 216/* compat function that calls above */ 217 218KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 219krb5_verify_user(krb5_context context, 220 krb5_principal principal, 221 krb5_ccache ccache, 222 const char *password, 223 krb5_boolean secure, 224 const char *service) 225{ 226 krb5_verify_opt opt; 227 228 krb5_verify_opt_init(&opt); 229 230 krb5_verify_opt_set_ccache(&opt, ccache); 231 krb5_verify_opt_set_secure(&opt, secure); 232 krb5_verify_opt_set_service(&opt, service); 233 234 return krb5_verify_user_opt(context, principal, password, &opt); 235} 236 237/* 238 * A variant of `krb5_verify_user'. The realm of `principal' is 239 * ignored and all the local realms are tried. 240 */ 241 242KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 243krb5_verify_user_lrealm(krb5_context context, 244 krb5_principal principal, 245 krb5_ccache ccache, 246 const char *password, 247 krb5_boolean secure, 248 const char *service) 249{ 250 krb5_verify_opt opt; 251 252 krb5_verify_opt_init(&opt); 253 254 krb5_verify_opt_set_ccache(&opt, ccache); 255 krb5_verify_opt_set_secure(&opt, secure); 256 krb5_verify_opt_set_service(&opt, service); 257 krb5_verify_opt_set_flags(&opt, KRB5_VERIFY_LREALMS); 258 259 return krb5_verify_user_opt(context, principal, password, &opt); 260} 261