1 /* $OpenBSD: x509_att.c,v 1.19 2022/05/09 19:19:33 jsing 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_lcl.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 77 int 78 X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid, int lastpos) 79 { 80 ASN1_OBJECT *obj; 81 82 obj = OBJ_nid2obj(nid); 83 if (obj == NULL) 84 return (-2); 85 return (X509at_get_attr_by_OBJ(x, obj, lastpos)); 86 } 87 88 int 89 X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, 90 const ASN1_OBJECT *obj, int lastpos) 91 { 92 int n; 93 X509_ATTRIBUTE *ex; 94 95 if (sk == NULL) 96 return (-1); 97 lastpos++; 98 if (lastpos < 0) 99 lastpos = 0; 100 n = sk_X509_ATTRIBUTE_num(sk); 101 for (; lastpos < n; lastpos++) { 102 ex = sk_X509_ATTRIBUTE_value(sk, lastpos); 103 if (OBJ_cmp(ex->object, obj) == 0) 104 return (lastpos); 105 } 106 return (-1); 107 } 108 109 X509_ATTRIBUTE * 110 X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc) 111 { 112 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) 113 return NULL; 114 else 115 return sk_X509_ATTRIBUTE_value(x, loc); 116 } 117 118 X509_ATTRIBUTE * 119 X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc) 120 { 121 X509_ATTRIBUTE *ret; 122 123 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) 124 return (NULL); 125 ret = sk_X509_ATTRIBUTE_delete(x, loc); 126 return (ret); 127 } 128 129 STACK_OF(X509_ATTRIBUTE) * 130 X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x, X509_ATTRIBUTE *attr) 131 { 132 X509_ATTRIBUTE *new_attr = NULL; 133 STACK_OF(X509_ATTRIBUTE) *sk = NULL; 134 135 if (x == NULL) { 136 X509error(ERR_R_PASSED_NULL_PARAMETER); 137 return (NULL); 138 } 139 140 if (*x == NULL) { 141 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL) 142 goto err; 143 } else 144 sk = *x; 145 146 if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL) 147 goto err2; 148 if (!sk_X509_ATTRIBUTE_push(sk, new_attr)) 149 goto err; 150 if (*x == NULL) 151 *x = sk; 152 return (sk); 153 154 err: 155 X509error(ERR_R_MALLOC_FAILURE); 156 err2: 157 if (new_attr != NULL) 158 X509_ATTRIBUTE_free(new_attr); 159 if (sk != NULL && sk != *x) 160 sk_X509_ATTRIBUTE_free(sk); 161 return (NULL); 162 } 163 164 STACK_OF(X509_ATTRIBUTE) * 165 X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x, const ASN1_OBJECT *obj, 166 int type, const unsigned char *bytes, int len) 167 { 168 X509_ATTRIBUTE *attr; 169 STACK_OF(X509_ATTRIBUTE) *ret; 170 171 attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len); 172 if (!attr) 173 return 0; 174 ret = X509at_add1_attr(x, attr); 175 X509_ATTRIBUTE_free(attr); 176 return ret; 177 } 178 179 STACK_OF(X509_ATTRIBUTE) * 180 X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x, int nid, int type, 181 const unsigned char *bytes, int len) 182 { 183 X509_ATTRIBUTE *attr; 184 STACK_OF(X509_ATTRIBUTE) *ret; 185 186 attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len); 187 if (!attr) 188 return 0; 189 ret = X509at_add1_attr(x, attr); 190 X509_ATTRIBUTE_free(attr); 191 return ret; 192 } 193 194 STACK_OF(X509_ATTRIBUTE) * 195 X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x, const char *attrname, 196 int type, const unsigned char *bytes, int len) 197 { 198 X509_ATTRIBUTE *attr; 199 STACK_OF(X509_ATTRIBUTE) *ret; 200 201 attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len); 202 if (!attr) 203 return 0; 204 ret = X509at_add1_attr(x, attr); 205 X509_ATTRIBUTE_free(attr); 206 return ret; 207 } 208 209 void * 210 X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x, const ASN1_OBJECT *obj, 211 int lastpos, int type) 212 { 213 int i; 214 X509_ATTRIBUTE *at; 215 216 i = X509at_get_attr_by_OBJ(x, obj, lastpos); 217 if (i == -1) 218 return NULL; 219 if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1)) 220 return NULL; 221 at = X509at_get_attr(x, i); 222 if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1)) 223 return NULL; 224 return X509_ATTRIBUTE_get0_data(at, 0, type, NULL); 225 } 226 227 X509_ATTRIBUTE * 228 X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid, int atrtype, 229 const void *data, int len) 230 { 231 ASN1_OBJECT *obj; 232 X509_ATTRIBUTE *ret; 233 234 obj = OBJ_nid2obj(nid); 235 if (obj == NULL) { 236 X509error(X509_R_UNKNOWN_NID); 237 return (NULL); 238 } 239 ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len); 240 if (ret == NULL) 241 ASN1_OBJECT_free(obj); 242 return (ret); 243 } 244 245 X509_ATTRIBUTE * 246 X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr, const ASN1_OBJECT *obj, 247 int atrtype, const void *data, int len) 248 { 249 X509_ATTRIBUTE *ret; 250 251 if ((attr == NULL) || (*attr == NULL)) { 252 if ((ret = X509_ATTRIBUTE_new()) == NULL) { 253 X509error(ERR_R_MALLOC_FAILURE); 254 return (NULL); 255 } 256 } else 257 ret= *attr; 258 259 if (!X509_ATTRIBUTE_set1_object(ret, obj)) 260 goto err; 261 if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len)) 262 goto err; 263 264 if ((attr != NULL) && (*attr == NULL)) 265 *attr = ret; 266 return (ret); 267 268 err: 269 if ((attr == NULL) || (ret != *attr)) 270 X509_ATTRIBUTE_free(ret); 271 return (NULL); 272 } 273 274 X509_ATTRIBUTE * 275 X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr, const char *atrname, 276 int type, const unsigned char *bytes, int len) 277 { 278 ASN1_OBJECT *obj; 279 X509_ATTRIBUTE *nattr; 280 281 obj = OBJ_txt2obj(atrname, 0); 282 if (obj == NULL) { 283 X509error(X509_R_INVALID_FIELD_NAME); 284 ERR_asprintf_error_data("name=%s", atrname); 285 return (NULL); 286 } 287 nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len); 288 ASN1_OBJECT_free(obj); 289 return nattr; 290 } 291 292 int 293 X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj) 294 { 295 if ((attr == NULL) || (obj == NULL)) 296 return (0); 297 ASN1_OBJECT_free(attr->object); 298 attr->object = OBJ_dup(obj); 299 return attr->object != NULL; 300 } 301 302 int 303 X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, 304 int len) 305 { 306 ASN1_TYPE *ttmp = NULL; 307 ASN1_STRING *stmp = NULL; 308 int atype = 0; 309 310 if (!attr) 311 return 0; 312 if (attrtype & MBSTRING_FLAG) { 313 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype, 314 OBJ_obj2nid(attr->object)); 315 if (!stmp) { 316 X509error(ERR_R_ASN1_LIB); 317 return 0; 318 } 319 atype = stmp->type; 320 } else if (len != -1){ 321 if (!(stmp = ASN1_STRING_type_new(attrtype))) 322 goto err; 323 if (!ASN1_STRING_set(stmp, data, len)) 324 goto err; 325 atype = attrtype; 326 } 327 /* 328 * This is a bit naughty because the attribute should really have 329 * at least one value but some types use and zero length SET and 330 * require this. 331 */ 332 if (attrtype == 0) { 333 ASN1_STRING_free(stmp); 334 return 1; 335 } 336 337 if (!(ttmp = ASN1_TYPE_new())) 338 goto err; 339 if ((len == -1) && !(attrtype & MBSTRING_FLAG)) { 340 if (!ASN1_TYPE_set1(ttmp, attrtype, data)) 341 goto err; 342 } else 343 ASN1_TYPE_set(ttmp, atype, stmp); 344 if (!sk_ASN1_TYPE_push(attr->set, ttmp)) 345 goto err; 346 return 1; 347 348 err: 349 ASN1_TYPE_free(ttmp); 350 ASN1_STRING_free(stmp); 351 X509error(ERR_R_MALLOC_FAILURE); 352 return 0; 353 } 354 355 int 356 X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr) 357 { 358 if (attr == NULL) 359 return 0; 360 361 return sk_ASN1_TYPE_num(attr->set); 362 } 363 364 ASN1_OBJECT * 365 X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr) 366 { 367 if (attr == NULL) 368 return (NULL); 369 return (attr->object); 370 } 371 372 void * 373 X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx, int atrtype, void *data) 374 { 375 ASN1_TYPE *ttmp; 376 377 ttmp = X509_ATTRIBUTE_get0_type(attr, idx); 378 if (!ttmp) 379 return NULL; 380 if (atrtype != ASN1_TYPE_get(ttmp)){ 381 X509error(X509_R_WRONG_TYPE); 382 return NULL; 383 } 384 return ttmp->value.ptr; 385 } 386 387 ASN1_TYPE * 388 X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx) 389 { 390 if (attr == NULL) 391 return (NULL); 392 393 return sk_ASN1_TYPE_value(attr->set, idx); 394 } 395