1 /* $OpenBSD: x509_att.c,v 1.25 2024/08/31 10:46:40 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_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid, int lastpos) 73 { 74 ASN1_OBJECT *obj; 75 76 obj = OBJ_nid2obj(nid); 77 if (obj == NULL) 78 return (-2); 79 return (X509at_get_attr_by_OBJ(x, obj, lastpos)); 80 } 81 82 int 83 X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, 84 const ASN1_OBJECT *obj, int lastpos) 85 { 86 int n; 87 X509_ATTRIBUTE *ex; 88 89 if (sk == NULL) 90 return (-1); 91 lastpos++; 92 if (lastpos < 0) 93 lastpos = 0; 94 n = sk_X509_ATTRIBUTE_num(sk); 95 for (; lastpos < n; lastpos++) { 96 ex = sk_X509_ATTRIBUTE_value(sk, lastpos); 97 if (OBJ_cmp(ex->object, obj) == 0) 98 return (lastpos); 99 } 100 return (-1); 101 } 102 103 STACK_OF(X509_ATTRIBUTE) * 104 X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x, X509_ATTRIBUTE *attr) 105 { 106 X509_ATTRIBUTE *new_attr = NULL; 107 STACK_OF(X509_ATTRIBUTE) *sk = NULL; 108 109 if (x == NULL) { 110 X509error(ERR_R_PASSED_NULL_PARAMETER); 111 return (NULL); 112 } 113 114 if (*x == NULL) { 115 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL) 116 goto err; 117 } else 118 sk = *x; 119 120 if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL) 121 goto err2; 122 if (!sk_X509_ATTRIBUTE_push(sk, new_attr)) 123 goto err; 124 if (*x == NULL) 125 *x = sk; 126 return (sk); 127 128 err: 129 X509error(ERR_R_MALLOC_FAILURE); 130 err2: 131 if (new_attr != NULL) 132 X509_ATTRIBUTE_free(new_attr); 133 if (sk != NULL && sk != *x) 134 sk_X509_ATTRIBUTE_free(sk); 135 return (NULL); 136 } 137 138 STACK_OF(X509_ATTRIBUTE) * 139 X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x, const ASN1_OBJECT *obj, 140 int type, const unsigned char *bytes, int len) 141 { 142 X509_ATTRIBUTE *attr; 143 STACK_OF(X509_ATTRIBUTE) *ret; 144 145 attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len); 146 if (!attr) 147 return 0; 148 ret = X509at_add1_attr(x, attr); 149 X509_ATTRIBUTE_free(attr); 150 return ret; 151 } 152 153 STACK_OF(X509_ATTRIBUTE) * 154 X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x, int nid, int type, 155 const unsigned char *bytes, int len) 156 { 157 X509_ATTRIBUTE *attr; 158 STACK_OF(X509_ATTRIBUTE) *ret; 159 160 attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len); 161 if (!attr) 162 return 0; 163 ret = X509at_add1_attr(x, attr); 164 X509_ATTRIBUTE_free(attr); 165 return ret; 166 } 167 168 STACK_OF(X509_ATTRIBUTE) * 169 X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x, const char *attrname, 170 int type, const unsigned char *bytes, int len) 171 { 172 X509_ATTRIBUTE *attr; 173 STACK_OF(X509_ATTRIBUTE) *ret; 174 175 attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len); 176 if (!attr) 177 return 0; 178 ret = X509at_add1_attr(x, attr); 179 X509_ATTRIBUTE_free(attr); 180 return ret; 181 } 182 183 void * 184 X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x, const ASN1_OBJECT *obj, 185 int lastpos, int type) 186 { 187 int i; 188 X509_ATTRIBUTE *at; 189 190 i = X509at_get_attr_by_OBJ(x, obj, lastpos); 191 if (i == -1) 192 return NULL; 193 if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1)) 194 return NULL; 195 at = sk_X509_ATTRIBUTE_value(x, i); 196 if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1)) 197 return NULL; 198 return X509_ATTRIBUTE_get0_data(at, 0, type, NULL); 199 } 200 201 X509_ATTRIBUTE * 202 X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid, int atrtype, 203 const void *data, int len) 204 { 205 ASN1_OBJECT *obj; 206 X509_ATTRIBUTE *ret; 207 208 obj = OBJ_nid2obj(nid); 209 if (obj == NULL) { 210 X509error(X509_R_UNKNOWN_NID); 211 return (NULL); 212 } 213 ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len); 214 if (ret == NULL) 215 ASN1_OBJECT_free(obj); 216 return (ret); 217 } 218 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_NID); 219 220 X509_ATTRIBUTE * 221 X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr, const ASN1_OBJECT *obj, 222 int atrtype, const void *data, int len) 223 { 224 X509_ATTRIBUTE *ret; 225 226 if ((attr == NULL) || (*attr == NULL)) { 227 if ((ret = X509_ATTRIBUTE_new()) == NULL) { 228 X509error(ERR_R_MALLOC_FAILURE); 229 return (NULL); 230 } 231 } else 232 ret= *attr; 233 234 if (!X509_ATTRIBUTE_set1_object(ret, obj)) 235 goto err; 236 if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len)) 237 goto err; 238 239 if ((attr != NULL) && (*attr == NULL)) 240 *attr = ret; 241 return (ret); 242 243 err: 244 if ((attr == NULL) || (ret != *attr)) 245 X509_ATTRIBUTE_free(ret); 246 return (NULL); 247 } 248 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_OBJ); 249 250 X509_ATTRIBUTE * 251 X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr, const char *atrname, 252 int type, const unsigned char *bytes, int len) 253 { 254 ASN1_OBJECT *obj; 255 X509_ATTRIBUTE *nattr; 256 257 obj = OBJ_txt2obj(atrname, 0); 258 if (obj == NULL) { 259 X509error(X509_R_INVALID_FIELD_NAME); 260 ERR_asprintf_error_data("name=%s", atrname); 261 return (NULL); 262 } 263 nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len); 264 ASN1_OBJECT_free(obj); 265 return nattr; 266 } 267 LCRYPTO_ALIAS(X509_ATTRIBUTE_create_by_txt); 268 269 int 270 X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj) 271 { 272 if ((attr == NULL) || (obj == NULL)) 273 return (0); 274 ASN1_OBJECT_free(attr->object); 275 attr->object = OBJ_dup(obj); 276 return attr->object != NULL; 277 } 278 LCRYPTO_ALIAS(X509_ATTRIBUTE_set1_object); 279 280 int 281 X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, 282 int len) 283 { 284 ASN1_TYPE *ttmp = NULL; 285 ASN1_STRING *stmp = NULL; 286 int atype = 0; 287 288 if (!attr) 289 return 0; 290 if (attrtype & MBSTRING_FLAG) { 291 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype, 292 OBJ_obj2nid(attr->object)); 293 if (!stmp) { 294 X509error(ERR_R_ASN1_LIB); 295 return 0; 296 } 297 atype = stmp->type; 298 } else if (len != -1){ 299 if (!(stmp = ASN1_STRING_type_new(attrtype))) 300 goto err; 301 if (!ASN1_STRING_set(stmp, data, len)) 302 goto err; 303 atype = attrtype; 304 } 305 /* 306 * This is a bit naughty because the attribute should really have 307 * at least one value but some types use and zero length SET and 308 * require this. 309 */ 310 if (attrtype == 0) { 311 ASN1_STRING_free(stmp); 312 return 1; 313 } 314 315 if (!(ttmp = ASN1_TYPE_new())) 316 goto err; 317 if ((len == -1) && !(attrtype & MBSTRING_FLAG)) { 318 if (!ASN1_TYPE_set1(ttmp, attrtype, data)) 319 goto err; 320 } else 321 ASN1_TYPE_set(ttmp, atype, stmp); 322 if (!sk_ASN1_TYPE_push(attr->set, ttmp)) 323 goto err; 324 return 1; 325 326 err: 327 ASN1_TYPE_free(ttmp); 328 ASN1_STRING_free(stmp); 329 X509error(ERR_R_MALLOC_FAILURE); 330 return 0; 331 } 332 LCRYPTO_ALIAS(X509_ATTRIBUTE_set1_data); 333 334 int 335 X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr) 336 { 337 if (attr == NULL) 338 return 0; 339 340 return sk_ASN1_TYPE_num(attr->set); 341 } 342 LCRYPTO_ALIAS(X509_ATTRIBUTE_count); 343 344 ASN1_OBJECT * 345 X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr) 346 { 347 if (attr == NULL) 348 return (NULL); 349 return (attr->object); 350 } 351 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_object); 352 353 void * 354 X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx, int atrtype, void *data) 355 { 356 ASN1_TYPE *ttmp; 357 358 ttmp = X509_ATTRIBUTE_get0_type(attr, idx); 359 if (!ttmp) 360 return NULL; 361 if (atrtype != ASN1_TYPE_get(ttmp)){ 362 X509error(X509_R_WRONG_TYPE); 363 return NULL; 364 } 365 return ttmp->value.ptr; 366 } 367 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_data); 368 369 ASN1_TYPE * 370 X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx) 371 { 372 if (attr == NULL) 373 return (NULL); 374 375 return sk_ASN1_TYPE_value(attr->set, idx); 376 } 377 LCRYPTO_ALIAS(X509_ATTRIBUTE_get0_type); 378