crypto/libressl/crypto/x509/x509_att.c

   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 }