1 /* $OpenBSD: x509_v3.c,v 1.43 2024/07/12 09:57:04 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/err.h> 63 #include <openssl/objects.h> 64 #include <openssl/stack.h> 65 #include <openssl/x509.h> 66 #include <openssl/x509v3.h> 67 68 #include "x509_local.h" 69 70 int 71 X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *exts) 72 { 73 if (exts == NULL) 74 return 0; 75 76 return sk_X509_EXTENSION_num(exts); 77 } 78 LCRYPTO_ALIAS(X509v3_get_ext_count); 79 80 int 81 X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *exts, int nid, int lastpos) 82 { 83 const ASN1_OBJECT *obj; 84 85 if ((obj = OBJ_nid2obj(nid)) == NULL) 86 return -2; 87 88 return X509v3_get_ext_by_OBJ(exts, obj, lastpos); 89 } 90 LCRYPTO_ALIAS(X509v3_get_ext_by_NID); 91 92 int 93 X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *exts, 94 const ASN1_OBJECT *obj, int lastpos) 95 { 96 if (++lastpos < 0) 97 lastpos = 0; 98 99 for (; lastpos < X509v3_get_ext_count(exts); lastpos++) { 100 const X509_EXTENSION *ext = X509v3_get_ext(exts, lastpos); 101 102 if (OBJ_cmp(ext->object, obj) == 0) 103 return lastpos; 104 } 105 106 return -1; 107 } 108 LCRYPTO_ALIAS(X509v3_get_ext_by_OBJ); 109 110 int 111 X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *exts, int critical, 112 int lastpos) 113 { 114 critical = (critical != 0); 115 116 if (++lastpos < 0) 117 lastpos = 0; 118 119 for (; lastpos < X509v3_get_ext_count(exts); lastpos++) { 120 const X509_EXTENSION *ext = X509v3_get_ext(exts, lastpos); 121 122 if (X509_EXTENSION_get_critical(ext) == critical) 123 return lastpos; 124 } 125 126 return -1; 127 } 128 LCRYPTO_ALIAS(X509v3_get_ext_by_critical); 129 130 X509_EXTENSION * 131 X509v3_get_ext(const STACK_OF(X509_EXTENSION) *exts, int loc) 132 { 133 return sk_X509_EXTENSION_value(exts, loc); 134 } 135 LCRYPTO_ALIAS(X509v3_get_ext); 136 137 X509_EXTENSION * 138 X509v3_delete_ext(STACK_OF(X509_EXTENSION) *exts, int loc) 139 { 140 return sk_X509_EXTENSION_delete(exts, loc); 141 } 142 LCRYPTO_ALIAS(X509v3_delete_ext); 143 144 STACK_OF(X509_EXTENSION) * 145 X509v3_add_ext(STACK_OF(X509_EXTENSION) **out_exts, X509_EXTENSION *ext, int loc) 146 { 147 STACK_OF(X509_EXTENSION) *exts = NULL; 148 X509_EXTENSION *new_ext = NULL; 149 150 /* 151 * XXX - Nonsense from the poorly reviewed OpenSSL c755c5fd8ba (2005). 152 * This check should have been joined with the next check, i.e., if no 153 * stack was passed in, a new one should be created and returned. 154 */ 155 if (out_exts == NULL) { 156 X509error(ERR_R_PASSED_NULL_PARAMETER); 157 goto err; 158 } 159 160 if ((exts = *out_exts) == NULL) 161 exts = sk_X509_EXTENSION_new_null(); 162 if (exts == NULL) { 163 X509error(ERR_R_MALLOC_FAILURE); 164 goto err; 165 } 166 167 if ((new_ext = X509_EXTENSION_dup(ext)) == NULL) 168 goto err; 169 if (!sk_X509_EXTENSION_insert(exts, new_ext, loc)) 170 goto err; 171 new_ext = NULL; 172 173 *out_exts = exts; 174 175 return exts; 176 177 err: 178 X509_EXTENSION_free(new_ext); 179 if (out_exts != NULL && exts != *out_exts) 180 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free); 181 182 return NULL; 183 } 184 LCRYPTO_ALIAS(X509v3_add_ext); 185 186 X509_EXTENSION * 187 X509_EXTENSION_create_by_NID(X509_EXTENSION **out_ext, int nid, int critical, 188 ASN1_OCTET_STRING *data) 189 { 190 const ASN1_OBJECT *obj; 191 192 if ((obj = OBJ_nid2obj(nid)) == NULL) { 193 X509error(X509_R_UNKNOWN_NID); 194 return NULL; 195 } 196 197 return X509_EXTENSION_create_by_OBJ(out_ext, obj, critical, data); 198 } 199 LCRYPTO_ALIAS(X509_EXTENSION_create_by_NID); 200 201 X509_EXTENSION * 202 X509_EXTENSION_create_by_OBJ(X509_EXTENSION **out_ext, const ASN1_OBJECT *obj, 203 int critical, ASN1_OCTET_STRING *data) 204 { 205 X509_EXTENSION *ext; 206 207 if (out_ext == NULL || (ext = *out_ext) == NULL) 208 ext = X509_EXTENSION_new(); 209 if (ext == NULL) { 210 X509error(ERR_R_MALLOC_FAILURE); 211 goto err; 212 } 213 214 if (!X509_EXTENSION_set_object(ext, obj)) 215 goto err; 216 if (!X509_EXTENSION_set_critical(ext, critical)) 217 goto err; 218 if (!X509_EXTENSION_set_data(ext, data)) 219 goto err; 220 221 if (out_ext != NULL) 222 *out_ext = ext; 223 224 return ext; 225 226 err: 227 if (out_ext == NULL || ext != *out_ext) 228 X509_EXTENSION_free(ext); 229 230 return NULL; 231 } 232 LCRYPTO_ALIAS(X509_EXTENSION_create_by_OBJ); 233 234 int 235 X509_EXTENSION_set_object(X509_EXTENSION *ext, const ASN1_OBJECT *obj) 236 { 237 if (ext == NULL || obj == NULL) 238 return 0; 239 240 ASN1_OBJECT_free(ext->object); 241 return (ext->object = OBJ_dup(obj)) != NULL; 242 } 243 LCRYPTO_ALIAS(X509_EXTENSION_set_object); 244 245 int 246 X509_EXTENSION_set_critical(X509_EXTENSION *ext, int critical) 247 { 248 if (ext == NULL) 249 return 0; 250 251 ext->critical = critical ? 0xFF : -1; 252 253 return 1; 254 } 255 LCRYPTO_ALIAS(X509_EXTENSION_set_critical); 256 257 int 258 X509_EXTENSION_set_data(X509_EXTENSION *ext, ASN1_OCTET_STRING *data) 259 { 260 if (ext == NULL) 261 return 0; 262 263 return ASN1_STRING_set(ext->value, data->data, data->length); 264 } 265 LCRYPTO_ALIAS(X509_EXTENSION_set_data); 266 267 ASN1_OBJECT * 268 X509_EXTENSION_get_object(X509_EXTENSION *ext) 269 { 270 if (ext == NULL) 271 return NULL; 272 273 return ext->object; 274 } 275 LCRYPTO_ALIAS(X509_EXTENSION_get_object); 276 277 ASN1_OCTET_STRING * 278 X509_EXTENSION_get_data(X509_EXTENSION *ext) 279 { 280 if (ext == NULL) 281 return NULL; 282 283 return ext->value; 284 } 285 LCRYPTO_ALIAS(X509_EXTENSION_get_data); 286 287 int 288 X509_EXTENSION_get_critical(const X509_EXTENSION *ext) 289 { 290 if (ext == NULL) 291 return 0; 292 293 return ext->critical > 0; 294 } 295 LCRYPTO_ALIAS(X509_EXTENSION_get_critical); 296