1 /* $OpenBSD: x509_att.c,v 1.22 2023/02/16 08:38:17 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/evp.h> 64 #include <openssl/objects.h> 65 #include <openssl/stack.h> 66 #include <openssl/x509.h> 67 #include <openssl/x509v3.h> 68 69 #include "x509_local.h" 70 71 int 72 X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x) 73 { 74 return sk_X509_ATTRIBUTE_num(x); 75 } 76 LCRYPTO_ALIAS(X509at_get_attr_count); 77 78 int 79 X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid, int lastpos) 80 { 81 ASN1_OBJECT *obj; 82 83 obj = OBJ_nid2obj(nid); 84 if (obj == NULL) 85 return (-2); 86 return (X509at_get_attr_by_OBJ(x, obj, lastpos)); 87 } 88 LCRYPTO_ALIAS(X509at_get_attr_by_NID); 89 90 int 91 X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, 92 const ASN1_OBJECT *obj, int lastpos) 93 { 94 int n; 95 X509_ATTRIBUTE *ex; 96 97 if (sk == NULL) 98 return (-1); 99 lastpos++; 100 if (lastpos < 0) 101 lastpos = 0; 102 n = sk_X509_ATTRIBUTE_num(sk); 103 for (; lastpos < n; lastpos++) { 104 ex = sk_X509_ATTRIBUTE_value(sk, lastpos); 105 if (OBJ_cmp(ex->object, obj) == 0) 106 return (lastpos); 107 } 108 return (-1); 109 } 110 LCRYPTO_ALIAS(X509at_get_attr_by_OBJ); 111 112 X509_ATTRIBUTE * 113 X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc) 114 { 115 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) 116 return NULL; 117 else 118 return sk_X509_ATTRIBUTE_value(x, loc); 119 } 120 LCRYPTO_ALIAS(X509at_get_attr); 121 122 X509_ATTRIBUTE * 123 X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc) 124 { 125 X509_ATTRIBUTE *ret; 126 127 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) 128 return (NULL); 129 ret = sk_X509_ATTRIBUTE_delete(x, loc); 130 return (ret); 131 } 132 LCRYPTO_ALIAS(X509at_delete_attr); 133 134 STACK_OF(X509_ATTRIBUTE) * 135 X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x, X509_ATTRIBUTE *attr) 136 { 137 X509_ATTRIBUTE *new_attr = NULL; 138 STACK_OF(X509_ATTRIBUTE) *sk = NULL; 139 140 if (x == NULL) { 141 X509error(ERR_R_PASSED_NULL_PARAMETER); 142 return (NULL); 143 } 144 145 if (*x == NULL) { 146 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL) 147 goto err; 148 } else 149 sk = *x; 150 151 if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL) 152 goto err2; 153 if (!sk_X509_ATTRIBUTE_push(sk, new_attr)) 154 goto err; 155 if (*x == NULL) 156 *x = sk; 157 return (sk); 158 159 err: 160 X509error(ERR_R_MALLOC_FAILURE); 161 err2: 162 if (new_attr != NULL) 163 X509_ATTRIBUTE_free(new_attr); 164 if (sk != NULL && sk != *x) 165 sk_X509_ATTRIBUTE_free(sk); 166 return (NULL); 167 } 168 LCRYPTO_ALIAS(X509at_add1_attr); 169 170 STACK_OF(X509_ATTRIBUTE) * 171 X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x, const ASN1_OBJECT *obj, 172 int type, const unsigned char *bytes, int len) 173 { 174 X509_ATTRIBUTE *attr; 175 STACK_OF(X509_ATTRIBUTE) *ret; 176 177 attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len); 178 if (!attr) 179 return 0; 180 ret = X509at_add1_attr(x, attr); 181 X509_ATTRIBUTE_free(attr); 182 return ret; 183 } 184 LCRYPTO_ALIAS(X509at_add1_attr_by_OBJ); 185 186 STACK_OF(X509_ATTRIBUTE) * 187 X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x, int nid, int type, 188 const unsigned char *bytes, int len) 189 { 190 X509_ATTRIBUTE *attr; 191 STACK_OF(X509_ATTRIBUTE) *ret; 192 193 attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len); 194 if (!attr) 195 return 0; 196 ret = X509at_add1_attr(x, attr); 197 X509_ATTRIBUTE_free(attr); 198 return ret; 199 } 200 LCRYPTO_ALIAS(X509at_add1_attr_by_NID); 201 202 STACK_OF(X509_ATTRIBUTE) * 203 X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x, const char *attrname, 204 int type, const unsigned char *bytes, int len) 205 { 206 X509_ATTRIBUTE *attr; 207 STACK_OF(X509_ATTRIBUTE) *ret; 208 209 attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len); 210 if (!attr) 211 return 0; 212 ret = X509at_add1_attr(x, attr); 213 X509_ATTRIBUTE_free(attr); 214 return ret; 215 } 216 LCRYPTO_ALIAS(X509at_add1_attr_by_txt); 217 218 void * 219 X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x, const ASN1_OBJECT *obj, 220 int lastpos, int type) 221 { 222 int i; 223 X509_ATTRIBUTE *at; 224 225 i = X509at_get_attr_by_OBJ(x, obj, lastpos); 226 if (i == -1) 227 return NULL; 228 if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1)) 229 return NULL; 230 at = X509at_get_attr(x, i); 231 if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1)) 232 return NULL; 233 return X509_ATTRIBUTE_get0_data(at, 0, type, NULL); 234 } 235 LCRYPTO_ALIAS(X509at_get0_data_by_OBJ); 236 237 X509_ATTRIBUTE * 238 X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid, int atrtype, 239 const void *data, int len) 240 { 241 ASN1_OBJECT *obj; 242 X509_ATTRIBUTE *ret; 243 244 obj = OBJ_nid2obj(nid); 245 if (obj == NULL) { 246 X509error(X509_R_UNKNOWN_NID); 247 return (NULL); 248 } 249 ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len); 250 if (ret == NULL) 251 ASN1_OBJECT_free(obj); 252 return (ret); 253 } 254 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_NID); 255 256 X509_ATTRIBUTE * 257 X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr, const ASN1_OBJECT *obj, 258 int atrtype, const void *data, int len) 259 { 260 X509_ATTRIBUTE *ret; 261 262 if ((attr == NULL) || (*attr == NULL)) { 263 if ((ret = X509_ATTRIBUTE_new()) == NULL) { 264 X509error(ERR_R_MALLOC_FAILURE); 265 return (NULL); 266 } 267 } else 268 ret= *attr; 269 270 if (!X509_ATTRIBUTE_set1_object(ret, obj)) 271 goto err; 272 if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len)) 273 goto err; 274 275 if ((attr != NULL) && (*attr == NULL)) 276 *attr = ret; 277 return (ret); 278 279 err: 280 if ((attr == NULL) || (ret != *attr)) 281 X509_ATTRIBUTE_free(ret); 282 return (NULL); 283 } 284 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_OBJ); 285 286 X509_ATTRIBUTE * 287 X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr, const char *atrname, 288 int type, const unsigned char *bytes, int len) 289 { 290 ASN1_OBJECT *obj; 291 X509_ATTRIBUTE *nattr; 292 293 obj = OBJ_txt2obj(atrname, 0); 294 if (obj == NULL) { 295 X509error(X509_R_INVALID_FIELD_NAME); 296 ERR_asprintf_error_data("name=%s", atrname); 297 return (NULL); 298 } 299 nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len); 300 ASN1_OBJECT_free(obj); 301 return nattr; 302 } 303 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_txt); 304 305 int 306 X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj) 307 { 308 if ((attr == NULL) || (obj == NULL)) 309 return (0); 310 ASN1_OBJECT_free(attr->object); 311 attr->object = OBJ_dup(obj); 312 return attr->object != NULL; 313 } 314 LCRYPTO_ALIAS(X509_ATTRIBUTE_set1_object); 315 316 int 317 X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, 318 int len) 319 { 320 ASN1_TYPE *ttmp = NULL; 321 ASN1_STRING *stmp = NULL; 322 int atype = 0; 323 324 if (!attr) 325 return 0; 326 if (attrtype & MBSTRING_FLAG) { 327 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype, 328 OBJ_obj2nid(attr->object)); 329 if (!stmp) { 330 X509error(ERR_R_ASN1_LIB); 331 return 0; 332 } 333 atype = stmp->type; 334 } else if (len != -1){ 335 if (!(stmp = ASN1_STRING_type_new(attrtype))) 336 goto err; 337 if (!ASN1_STRING_set(stmp, data, len)) 338 goto err; 339 atype = attrtype; 340 } 341 /* 342 * This is a bit naughty because the attribute should really have 343 * at least one value but some types use and zero length SET and 344 * require this. 345 */ 346 if (attrtype == 0) { 347 ASN1_STRING_free(stmp); 348 return 1; 349 } 350 351 if (!(ttmp = ASN1_TYPE_new())) 352 goto err; 353 if ((len == -1) && !(attrtype & MBSTRING_FLAG)) { 354 if (!ASN1_TYPE_set1(ttmp, attrtype, data)) 355 goto err; 356 } else 357 ASN1_TYPE_set(ttmp, atype, stmp); 358 if (!sk_ASN1_TYPE_push(attr->set, ttmp)) 359 goto err; 360 return 1; 361 362 err: 363 ASN1_TYPE_free(ttmp); 364 ASN1_STRING_free(stmp); 365 X509error(ERR_R_MALLOC_FAILURE); 366 return 0; 367 } 368 LCRYPTO_ALIAS(X509_ATTRIBUTE_set1_data); 369 370 int 371 X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr) 372 { 373 if (attr == NULL) 374 return 0; 375 376 return sk_ASN1_TYPE_num(attr->set); 377 } 378 LCRYPTO_ALIAS(X509_ATTRIBUTE_count); 379 380 ASN1_OBJECT * 381 X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr) 382 { 383 if (attr == NULL) 384 return (NULL); 385 return (attr->object); 386 } 387 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_object); 388 389 void * 390 X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx, int atrtype, void *data) 391 { 392 ASN1_TYPE *ttmp; 393 394 ttmp = X509_ATTRIBUTE_get0_type(attr, idx); 395 if (!ttmp) 396 return NULL; 397 if (atrtype != ASN1_TYPE_get(ttmp)){ 398 X509error(X509_R_WRONG_TYPE); 399 return NULL; 400 } 401 return ttmp->value.ptr; 402 } 403 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_data); 404 405 ASN1_TYPE * 406 X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx) 407 { 408 if (attr == NULL) 409 return (NULL); 410 411 return sk_ASN1_TYPE_value(attr->set, idx); 412 } 413 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_type); 414