1 /* 2 * Copyright (c) 1997-2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 36 RCSID("$Id: verify_user.c,v 1.12 2001/01/04 17:40:00 joda Exp $"); 37 38 static krb5_error_code 39 verify_common (krb5_context context, 40 krb5_principal principal, 41 krb5_ccache ccache, 42 krb5_boolean secure, 43 const char *service, 44 krb5_creds cred) 45 { 46 krb5_error_code ret; 47 krb5_principal server; 48 krb5_verify_init_creds_opt vopt; 49 krb5_ccache id; 50 51 ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST, 52 &server); 53 if(ret) return ret; 54 55 krb5_verify_init_creds_opt_init(&vopt); 56 krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure); 57 58 ret = krb5_verify_init_creds(context, 59 &cred, 60 server, 61 NULL, 62 NULL, 63 &vopt); 64 krb5_free_principal(context, server); 65 if(ret) return ret; 66 if(ccache == NULL) 67 ret = krb5_cc_default (context, &id); 68 else 69 id = ccache; 70 if(ret == 0){ 71 ret = krb5_cc_initialize(context, id, principal); 72 if(ret == 0){ 73 ret = krb5_cc_store_cred(context, id, &cred); 74 } 75 if(ccache == NULL) 76 krb5_cc_close(context, id); 77 } 78 krb5_free_creds_contents(context, &cred); 79 return ret; 80 } 81 82 /* 83 * Verify user `principal' with `password'. 84 * 85 * If `secure', also verify against local service key for `service'. 86 * 87 * As a side effect, fresh tickets are obtained and stored in `ccache'. 88 */ 89 90 krb5_error_code 91 krb5_verify_user(krb5_context context, 92 krb5_principal principal, 93 krb5_ccache ccache, 94 const char *password, 95 krb5_boolean secure, 96 const char *service) 97 { 98 99 krb5_error_code ret; 100 krb5_get_init_creds_opt opt; 101 krb5_creds cred; 102 103 krb5_get_init_creds_opt_init (&opt); 104 krb5_get_init_creds_opt_set_default_flags(context, NULL, 105 *krb5_princ_realm(context, principal), 106 &opt); 107 108 ret = krb5_get_init_creds_password (context, 109 &cred, 110 principal, 111 (char*)password, 112 krb5_prompter_posix, 113 NULL, 114 0, 115 NULL, 116 &opt); 117 118 if(ret) 119 return ret; 120 return verify_common (context, principal, ccache, secure, service, cred); 121 } 122 123 /* 124 * A variant of `krb5_verify_user'. The realm of `principal' is 125 * ignored and all the local realms are tried. 126 */ 127 128 krb5_error_code 129 krb5_verify_user_lrealm(krb5_context context, 130 krb5_principal principal, 131 krb5_ccache ccache, 132 const char *password, 133 krb5_boolean secure, 134 const char *service) 135 { 136 krb5_error_code ret; 137 krb5_get_init_creds_opt opt; 138 krb5_realm *realms, *r; 139 krb5_creds cred; 140 141 krb5_get_init_creds_opt_init (&opt); 142 143 ret = krb5_get_default_realms (context, &realms); 144 if (ret) 145 return ret; 146 ret = KRB5_CONFIG_NODEFREALM; 147 148 for (r = realms; *r != NULL && ret != 0; ++r) { 149 char *tmp = strdup (*r); 150 151 if (tmp == NULL) { 152 krb5_free_host_realm (context, realms); 153 return ENOMEM; 154 } 155 free (*krb5_princ_realm (context, principal)); 156 krb5_princ_set_realm (context, principal, &tmp); 157 158 krb5_get_init_creds_opt_set_default_flags(context, NULL, 159 *krb5_princ_realm(context, principal), 160 &opt); 161 ret = krb5_get_init_creds_password (context, 162 &cred, 163 principal, 164 (char*)password, 165 krb5_prompter_posix, 166 NULL, 167 0, 168 NULL, 169 &opt); 170 } 171 krb5_free_host_realm (context, realms); 172 if(ret) 173 return ret; 174 175 return verify_common (context, principal, ccache, secure, service, cred); 176 } 177