1 /* $NetBSD: verify_user.c,v 1.2 2017/01/28 21:31:49 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2004 Kungliga Tekniska Hgskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "krb5_locl.h" 37 38 static krb5_error_code 39 verify_common (krb5_context context, 40 krb5_principal principal, 41 krb5_ccache ccache, 42 krb5_keytab keytab, 43 krb5_boolean secure, 44 const char *service, 45 krb5_creds cred) 46 { 47 krb5_error_code ret; 48 krb5_principal server; 49 krb5_verify_init_creds_opt vopt; 50 krb5_ccache id; 51 52 ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST, 53 &server); 54 if(ret) 55 return ret; 56 57 krb5_verify_init_creds_opt_init(&vopt); 58 krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure); 59 60 ret = krb5_verify_init_creds(context, 61 &cred, 62 server, 63 keytab, 64 NULL, 65 &vopt); 66 krb5_free_principal(context, server); 67 if(ret) 68 return ret; 69 if(ccache == NULL) 70 ret = krb5_cc_default (context, &id); 71 else 72 id = ccache; 73 if(ret == 0){ 74 ret = krb5_cc_initialize(context, id, principal); 75 if(ret == 0){ 76 ret = krb5_cc_store_cred(context, id, &cred); 77 } 78 if(ccache == NULL) 79 krb5_cc_close(context, id); 80 } 81 krb5_free_cred_contents(context, &cred); 82 return ret; 83 } 84 85 /* 86 * Verify user `principal' with `password'. 87 * 88 * If `secure', also verify against local service key for `service'. 89 * 90 * As a side effect, fresh tickets are obtained and stored in `ccache'. 91 */ 92 93 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 94 krb5_verify_opt_init(krb5_verify_opt *opt) 95 { 96 memset(opt, 0, sizeof(*opt)); 97 opt->secure = TRUE; 98 opt->service = "host"; 99 } 100 101 KRB5_LIB_FUNCTION int KRB5_LIB_CALL 102 krb5_verify_opt_alloc(krb5_context context, krb5_verify_opt **opt) 103 { 104 *opt = calloc(1, sizeof(**opt)); 105 if ((*opt) == NULL) 106 return krb5_enomem(context); 107 krb5_verify_opt_init(*opt); 108 return 0; 109 } 110 111 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 112 krb5_verify_opt_free(krb5_verify_opt *opt) 113 { 114 free(opt); 115 } 116 117 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 118 krb5_verify_opt_set_ccache(krb5_verify_opt *opt, krb5_ccache ccache) 119 { 120 opt->ccache = ccache; 121 } 122 123 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 124 krb5_verify_opt_set_keytab(krb5_verify_opt *opt, krb5_keytab keytab) 125 { 126 opt->keytab = keytab; 127 } 128 129 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 130 krb5_verify_opt_set_secure(krb5_verify_opt *opt, krb5_boolean secure) 131 { 132 opt->secure = secure; 133 } 134 135 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 136 krb5_verify_opt_set_service(krb5_verify_opt *opt, const char *service) 137 { 138 opt->service = service; 139 } 140 141 KRB5_LIB_FUNCTION void KRB5_LIB_CALL 142 krb5_verify_opt_set_flags(krb5_verify_opt *opt, unsigned int flags) 143 { 144 opt->flags |= flags; 145 } 146 147 static krb5_error_code 148 verify_user_opt_int(krb5_context context, 149 krb5_principal principal, 150 const char *password, 151 krb5_verify_opt *vopt) 152 153 { 154 krb5_error_code ret; 155 krb5_get_init_creds_opt *opt; 156 krb5_creds cred; 157 158 ret = krb5_get_init_creds_opt_alloc (context, &opt); 159 if (ret) 160 return ret; 161 krb5_get_init_creds_opt_set_default_flags(context, NULL, 162 krb5_principal_get_realm(context, principal), 163 opt); 164 ret = krb5_get_init_creds_password (context, 165 &cred, 166 principal, 167 password, 168 krb5_prompter_posix, 169 NULL, 170 0, 171 NULL, 172 opt); 173 krb5_get_init_creds_opt_free(context, opt); 174 if(ret) 175 return ret; 176 #define OPT(V, D) ((vopt && (vopt->V)) ? (vopt->V) : (D)) 177 return verify_common (context, principal, OPT(ccache, NULL), 178 OPT(keytab, NULL), vopt ? vopt->secure : TRUE, 179 OPT(service, "host"), cred); 180 #undef OPT 181 } 182 183 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 184 krb5_verify_user_opt(krb5_context context, 185 krb5_principal principal, 186 const char *password, 187 krb5_verify_opt *opt) 188 { 189 krb5_error_code ret; 190 191 if(opt && (opt->flags & KRB5_VERIFY_LREALMS)) { 192 krb5_realm *realms, *r; 193 ret = krb5_get_default_realms (context, &realms); 194 if (ret) 195 return ret; 196 ret = KRB5_CONFIG_NODEFREALM; 197 198 for (r = realms; *r != NULL && ret != 0; ++r) { 199 ret = krb5_principal_set_realm(context, principal, *r); 200 if (ret) { 201 krb5_free_host_realm (context, realms); 202 return ret; 203 } 204 205 ret = verify_user_opt_int(context, principal, password, opt); 206 } 207 krb5_free_host_realm (context, realms); 208 if(ret) 209 return ret; 210 } else 211 ret = verify_user_opt_int(context, principal, password, opt); 212 return ret; 213 } 214 215 /* compat function that calls above */ 216 217 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 218 krb5_verify_user(krb5_context context, 219 krb5_principal principal, 220 krb5_ccache ccache, 221 const char *password, 222 krb5_boolean secure, 223 const char *service) 224 { 225 krb5_verify_opt opt; 226 227 krb5_verify_opt_init(&opt); 228 229 krb5_verify_opt_set_ccache(&opt, ccache); 230 krb5_verify_opt_set_secure(&opt, secure); 231 krb5_verify_opt_set_service(&opt, service); 232 233 return krb5_verify_user_opt(context, principal, password, &opt); 234 } 235 236 /* 237 * A variant of `krb5_verify_user'. The realm of `principal' is 238 * ignored and all the local realms are tried. 239 */ 240 241 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 242 krb5_verify_user_lrealm(krb5_context context, 243 krb5_principal principal, 244 krb5_ccache ccache, 245 const char *password, 246 krb5_boolean secure, 247 const char *service) 248 { 249 krb5_verify_opt opt; 250 251 krb5_verify_opt_init(&opt); 252 253 krb5_verify_opt_set_ccache(&opt, ccache); 254 krb5_verify_opt_set_secure(&opt, secure); 255 krb5_verify_opt_set_service(&opt, service); 256 krb5_verify_opt_set_flags(&opt, KRB5_VERIFY_LREALMS); 257 258 return krb5_verify_user_opt(context, principal, password, &opt); 259 } 260
Indexes created Wed Jul 29 00:25:28 UTC 2026