1 /* $NetBSD: creds.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Kungliga Tekniska Högskolan 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 "gsskrb5_locl.h" 37 38 OM_uint32 GSSAPI_CALLCONV 39 _gsskrb5_export_cred(OM_uint32 *minor_status, 40 gss_cred_id_t cred_handle, 41 gss_buffer_t cred_token) 42 { 43 gsskrb5_cred handle = (gsskrb5_cred)cred_handle; 44 krb5_context context; 45 krb5_error_code ret; 46 krb5_storage *sp; 47 krb5_data data, mech; 48 const char *type; 49 char *str; 50 51 GSSAPI_KRB5_INIT (&context); 52 53 if (handle->usage != GSS_C_INITIATE && handle->usage != GSS_C_BOTH) { 54 *minor_status = GSS_KRB5_S_G_BAD_USAGE; 55 return GSS_S_FAILURE; 56 } 57 58 sp = krb5_storage_emem(); 59 if (sp == NULL) { 60 *minor_status = ENOMEM; 61 return GSS_S_FAILURE; 62 } 63 64 type = krb5_cc_get_type(context, handle->ccache); 65 if (strcmp(type, "MEMORY") == 0) { 66 krb5_creds *creds; 67 krb5_data config_start_realm; 68 char *start_realm; 69 70 ret = krb5_store_uint32(sp, 0); 71 if (ret) { 72 krb5_storage_free(sp); 73 *minor_status = ret; 74 return GSS_S_FAILURE; 75 } 76 77 ret = krb5_cc_get_config(context, handle->ccache, NULL, "start_realm", 78 &config_start_realm); 79 if (ret == 0) { 80 start_realm = strndup(config_start_realm.data, 81 config_start_realm.length); 82 krb5_data_free(&config_start_realm); 83 } else { 84 start_realm = strdup(krb5_principal_get_realm(context, 85 handle->principal)); 86 } 87 if (start_realm == NULL) { 88 *minor_status = krb5_enomem(context); 89 krb5_storage_free(sp); 90 return GSS_S_FAILURE; 91 } 92 93 ret = _krb5_get_krbtgt(context, handle->ccache, start_realm, &creds); 94 free(start_realm); 95 start_realm = NULL; 96 if (ret) { 97 krb5_storage_free(sp); 98 *minor_status = ret; 99 return GSS_S_FAILURE; 100 } 101 102 ret = krb5_store_creds(sp, creds); 103 krb5_free_creds(context, creds); 104 if (ret) { 105 krb5_storage_free(sp); 106 *minor_status = ret; 107 return GSS_S_FAILURE; 108 } 109 110 } else { 111 ret = krb5_store_uint32(sp, 1); 112 if (ret) { 113 krb5_storage_free(sp); 114 *minor_status = ret; 115 return GSS_S_FAILURE; 116 } 117 118 ret = krb5_cc_get_full_name(context, handle->ccache, &str); 119 if (ret) { 120 krb5_storage_free(sp); 121 *minor_status = ret; 122 return GSS_S_FAILURE; 123 } 124 125 ret = krb5_store_string(sp, str); 126 free(str); 127 if (ret) { 128 krb5_storage_free(sp); 129 *minor_status = ret; 130 return GSS_S_FAILURE; 131 } 132 } 133 ret = krb5_storage_to_data(sp, &data); 134 krb5_storage_free(sp); 135 if (ret) { 136 *minor_status = ret; 137 return GSS_S_FAILURE; 138 } 139 sp = krb5_storage_emem(); 140 if (sp == NULL) { 141 krb5_data_free(&data); 142 *minor_status = ENOMEM; 143 return GSS_S_FAILURE; 144 } 145 146 mech.data = GSS_KRB5_MECHANISM->elements; 147 mech.length = GSS_KRB5_MECHANISM->length; 148 149 ret = krb5_store_data(sp, mech); 150 if (ret) { 151 krb5_data_free(&data); 152 krb5_storage_free(sp); 153 *minor_status = ret; 154 return GSS_S_FAILURE; 155 } 156 157 ret = krb5_store_data(sp, data); 158 krb5_data_free(&data); 159 if (ret) { 160 krb5_storage_free(sp); 161 *minor_status = ret; 162 return GSS_S_FAILURE; 163 } 164 165 ret = krb5_storage_to_data(sp, &data); 166 krb5_storage_free(sp); 167 if (ret) { 168 *minor_status = ret; 169 return GSS_S_FAILURE; 170 } 171 172 cred_token->value = data.data; 173 cred_token->length = data.length; 174 175 return GSS_S_COMPLETE; 176 } 177 178 OM_uint32 GSSAPI_CALLCONV 179 _gsskrb5_import_cred(OM_uint32 * minor_status, 180 gss_buffer_t cred_token, 181 gss_cred_id_t * cred_handle) 182 { 183 krb5_context context; 184 krb5_error_code ret; 185 gsskrb5_cred handle; 186 krb5_ccache id; 187 krb5_storage *sp; 188 char *str; 189 uint32_t type; 190 int flags = 0; 191 192 *cred_handle = GSS_C_NO_CREDENTIAL; 193 194 GSSAPI_KRB5_INIT (&context); 195 196 sp = krb5_storage_from_mem(cred_token->value, cred_token->length); 197 if (sp == NULL) { 198 *minor_status = ENOMEM; 199 return GSS_S_FAILURE; 200 } 201 202 ret = krb5_ret_uint32(sp, &type); 203 if (ret) { 204 krb5_storage_free(sp); 205 *minor_status = ret; 206 return GSS_S_FAILURE; 207 } 208 switch (type) { 209 case 0: { 210 krb5_creds creds; 211 212 ret = krb5_ret_creds(sp, &creds); 213 krb5_storage_free(sp); 214 if (ret) { 215 *minor_status = ret; 216 return GSS_S_FAILURE; 217 } 218 219 ret = krb5_cc_new_unique(context, "MEMORY", NULL, &id); 220 if (ret) { 221 *minor_status = ret; 222 return GSS_S_FAILURE; 223 } 224 225 ret = krb5_cc_initialize(context, id, creds.client); 226 if (ret) { 227 krb5_cc_destroy(context, id); 228 *minor_status = ret; 229 return GSS_S_FAILURE; 230 } 231 232 ret = krb5_cc_store_cred(context, id, &creds); 233 krb5_free_cred_contents(context, &creds); 234 if (ret) { 235 *minor_status = ret; 236 return GSS_S_FAILURE; 237 } 238 239 flags |= GSS_CF_DESTROY_CRED_ON_RELEASE; 240 241 break; 242 } 243 case 1: 244 ret = krb5_ret_string(sp, &str); 245 krb5_storage_free(sp); 246 if (ret) { 247 *minor_status = ret; 248 return GSS_S_FAILURE; 249 } 250 251 ret = krb5_cc_resolve(context, str, &id); 252 krb5_xfree(str); 253 if (ret) { 254 *minor_status = ret; 255 return GSS_S_FAILURE; 256 } 257 break; 258 259 default: 260 krb5_storage_free(sp); 261 *minor_status = 0; 262 return GSS_S_NO_CRED; 263 } 264 265 handle = calloc(1, sizeof(*handle)); 266 if (handle == NULL) { 267 krb5_cc_close(context, id); 268 *minor_status = ENOMEM; 269 return GSS_S_FAILURE; 270 } 271 272 handle->usage = GSS_C_INITIATE; 273 krb5_cc_get_principal(context, id, &handle->principal); 274 handle->ccache = id; 275 handle->cred_flags = flags; 276 277 *cred_handle = (gss_cred_id_t)handle; 278 279 return GSS_S_COMPLETE; 280 } 281