lib/libcrypto/x509/x509name.c

   1 /* $OpenBSD: x509name.c,v 1.14 2017/01/29 17:49:23 beck 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 #include <string.h>
  61
  62 #include <openssl/asn1.h>
  63 #include <openssl/err.h>
  64 #include <openssl/evp.h>
  65 #include <openssl/objects.h>
  66 #include <openssl/stack.h>
  67 #include <openssl/x509.h>
  68
  69 int
  70 X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)
  71 {
  72         ASN1_OBJECT *obj;
  73
  74         obj = OBJ_nid2obj(nid);
  75         if (obj == NULL)
  76                 return (-1);
  77         return (X509_NAME_get_text_by_OBJ(name, obj, buf, len));
  78 }
  79
  80 int
  81 X509_NAME_get_text_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, char *buf,
  82     int len)
  83 {
  84         int i;
  85         ASN1_STRING *data;
  86
  87         i = X509_NAME_get_index_by_OBJ(name, obj, -1);
  88         if (i < 0)
  89                 return (-1);
  90         data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));
  91         i = (data->length > (len - 1)) ? (len - 1) : data->length;
  92         if (buf == NULL)
  93                 return (data->length);
  94         if (i >= 0) {
  95                 memcpy(buf, data->data, i);
  96                 buf[i] = '\0';
  97         }
  98         return (i);
  99 }
 100
 101 int
 102 X509_NAME_entry_count(X509_NAME *name)
 103 {
 104         if (name == NULL)
 105                 return (0);
 106         return (sk_X509_NAME_ENTRY_num(name->entries));
 107 }
 108
 109 int
 110 X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)
 111 {
 112         ASN1_OBJECT *obj;
 113
 114         obj = OBJ_nid2obj(nid);
 115         if (obj == NULL)
 116                 return (-2);
 117         return (X509_NAME_get_index_by_OBJ(name, obj, lastpos));
 118 }
 119
 120 /* NOTE: you should be passsing -1, not 0 as lastpos */
 121 int
 122 X509_NAME_get_index_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int lastpos)
 123 {
 124         int n;
 125         X509_NAME_ENTRY *ne;
 126         STACK_OF(X509_NAME_ENTRY) *sk;
 127
 128         if (name == NULL)
 129                 return (-1);
 130         if (lastpos < 0)
 131                 lastpos = -1;
 132         sk = name->entries;
 133         n = sk_X509_NAME_ENTRY_num(sk);
 134         for (lastpos++; lastpos < n; lastpos++) {
 135                 ne = sk_X509_NAME_ENTRY_value(sk, lastpos);
 136                 if (OBJ_cmp(ne->object, obj) == 0)
 137                         return (lastpos);
 138         }
 139         return (-1);
 140 }
 141
 142 X509_NAME_ENTRY *
 143 X509_NAME_get_entry(X509_NAME *name, int loc)
 144 {
 145         if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc ||
 146             loc < 0)
 147                 return (NULL);
 148         else
 149                 return (sk_X509_NAME_ENTRY_value(name->entries, loc));
 150 }
 151
 152 X509_NAME_ENTRY *
 153 X509_NAME_delete_entry(X509_NAME *name, int loc)
 154 {
 155         X509_NAME_ENTRY *ret;
 156         int i, n, set_prev, set_next;
 157         STACK_OF(X509_NAME_ENTRY) *sk;
 158
 159         if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc ||
 160             loc < 0)
 161                 return (NULL);
 162         sk = name->entries;
 163         ret = sk_X509_NAME_ENTRY_delete(sk, loc);
 164         n = sk_X509_NAME_ENTRY_num(sk);
 165         name->modified = 1;
 166         if (loc == n)
 167                 return (ret);
 168
 169         /* else we need to fixup the set field */
 170         if (loc != 0)
 171                 set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;
 172         else
 173                 set_prev = ret->set - 1;
 174         set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 175
 176         /* set_prev is the previous set
 177          * set is the current set
 178          * set_next is the following
 179          * prev  1 1    1 1     1 1     1 1
 180          * set   1      1       2       2
 181          * next  1 1    2 2     2 2     3 2
 182          * so basically only if prev and next differ by 2, then
 183          * re-number down by 1 */
 184         if (set_prev + 1 < set_next)
 185                 for (i = loc; i < n; i++)
 186                         sk_X509_NAME_ENTRY_value(sk, i)->set--;
 187         return (ret);
 188 }
 189
 190 int
 191 X509_NAME_add_entry_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int type,
 192     unsigned char *bytes, int len, int loc, int set)
 193 {
 194         X509_NAME_ENTRY *ne;
 195         int ret;
 196
 197         ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);
 198         if (!ne)
 199                 return 0;
 200         ret = X509_NAME_add_entry(name, ne, loc, set);
 201         X509_NAME_ENTRY_free(ne);
 202         return ret;
 203 }
 204
 205 int
 206 X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
 207     unsigned char *bytes, int len, int loc, int set)
 208 {
 209         X509_NAME_ENTRY *ne;
 210         int ret;
 211
 212         ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);
 213         if (!ne)
 214                 return 0;
 215         ret = X509_NAME_add_entry(name, ne, loc, set);
 216         X509_NAME_ENTRY_free(ne);
 217         return ret;
 218 }
 219
 220 int
 221 X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
 222     const unsigned char *bytes, int len, int loc, int set)
 223 {
 224         X509_NAME_ENTRY *ne;
 225         int ret;
 226
 227         ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);
 228         if (!ne)
 229                 return 0;
 230         ret = X509_NAME_add_entry(name, ne, loc, set);
 231         X509_NAME_ENTRY_free(ne);
 232         return ret;
 233 }
 234
 235 /* if set is -1, append to previous set, 0 'a new one', and 1,
 236  * prepend to the guy we are about to stomp on. */
 237 int
 238 X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne, int loc, int set)
 239 {
 240         X509_NAME_ENTRY *new_name = NULL;
 241         int n, i, inc;
 242         STACK_OF(X509_NAME_ENTRY) *sk;
 243
 244         if (name == NULL)
 245                 return (0);
 246         sk = name->entries;
 247         n = sk_X509_NAME_ENTRY_num(sk);
 248         if (loc > n)
 249                 loc = n;
 250         else if (loc < 0)
 251                 loc = n;
 252
 253         name->modified = 1;
 254
 255         if (set == -1) {
 256                 if (loc == 0) {
 257                         set = 0;
 258                         inc = 1;
 259                 } else {
 260                         set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;
 261                         inc = 0;
 262                 }
 263         } else /* if (set >= 0) */ {
 264                 if (loc >= n) {
 265                         if (loc != 0)
 266                                 set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;
 267                         else
 268                                 set = 0;
 269                 } else
 270                         set = sk_X509_NAME_ENTRY_value(sk, loc)->set;
 271                 inc = (set == 0) ? 1 : 0;
 272         }
 273
 274         if ((new_name = X509_NAME_ENTRY_dup(ne)) == NULL)
 275                 goto err;
 276         new_name->set = set;
 277         if (!sk_X509_NAME_ENTRY_insert(sk, new_name, loc)) {
 278                 X509error(ERR_R_MALLOC_FAILURE);
 279                 goto err;
 280         }
 281         if (inc) {
 282                 n = sk_X509_NAME_ENTRY_num(sk);
 283                 for (i = loc + 1; i < n; i++)
 284                         sk_X509_NAME_ENTRY_value(sk, i - 1)->set += 1;
 285         }
 286         return (1);
 287
 288 err:
 289         if (new_name != NULL)
 290                 X509_NAME_ENTRY_free(new_name);
 291         return (0);
 292 }
 293
 294 X509_NAME_ENTRY *
 295 X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
 296     const char *field, int type, const unsigned char *bytes, int len)
 297 {
 298         ASN1_OBJECT *obj;
 299         X509_NAME_ENTRY *nentry;
 300
 301         obj = OBJ_txt2obj(field, 0);
 302         if (obj == NULL) {
 303                 X509error(X509_R_INVALID_FIELD_NAME);
 304                 ERR_asprintf_error_data("name=%s", field);
 305                 return (NULL);
 306         }
 307         nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 308         ASN1_OBJECT_free(obj);
 309         return nentry;
 310 }
 311
 312 X509_NAME_ENTRY *
 313 X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid, int type,
 314     unsigned char *bytes, int len)
 315 {
 316         ASN1_OBJECT *obj;
 317         X509_NAME_ENTRY *nentry;
 318
 319         obj = OBJ_nid2obj(nid);
 320         if (obj == NULL) {
 321                 X509error(X509_R_UNKNOWN_NID);
 322                 return (NULL);
 323         }
 324         nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
 325         ASN1_OBJECT_free(obj);
 326         return nentry;
 327 }
 328
 329 X509_NAME_ENTRY *
 330 X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne, ASN1_OBJECT *obj, int type,
 331     const unsigned char *bytes, int len)
 332 {
 333         X509_NAME_ENTRY *ret;
 334
 335         if ((ne == NULL) || (*ne == NULL)) {
 336                 if ((ret = X509_NAME_ENTRY_new()) == NULL)
 337                         return (NULL);
 338         } else
 339                 ret= *ne;
 340
 341         if (!X509_NAME_ENTRY_set_object(ret, obj))
 342                 goto err;
 343         if (!X509_NAME_ENTRY_set_data(ret, type, bytes, len))
 344                 goto err;
 345
 346         if ((ne != NULL) && (*ne == NULL))
 347                 *ne = ret;
 348         return (ret);
 349
 350 err:
 351         if ((ne == NULL) || (ret != *ne))
 352                 X509_NAME_ENTRY_free(ret);
 353         return (NULL);
 354 }
 355
 356 int
 357 X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, ASN1_OBJECT *obj)
 358 {
 359         if ((ne == NULL) || (obj == NULL)) {
 360                 X509error(ERR_R_PASSED_NULL_PARAMETER);
 361                 return (0);
 362         }
 363         ASN1_OBJECT_free(ne->object);
 364         ne->object = OBJ_dup(obj);
 365         return ((ne->object == NULL) ? 0 : 1);
 366 }
 367
 368 int
 369 X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
 370     const unsigned char *bytes, int len)
 371 {
 372         int i;
 373
 374         if ((ne == NULL) || ((bytes == NULL) && (len != 0)))
 375                 return (0);
 376         if ((type > 0) && (type & MBSTRING_FLAG))
 377                 return ASN1_STRING_set_by_NID(&ne->value, bytes, len, type,
 378                     OBJ_obj2nid(ne->object)) ? 1 : 0;
 379         if (len < 0)
 380                 len = strlen((const char *)bytes);
 381         i = ASN1_STRING_set(ne->value, bytes, len);
 382         if (!i)
 383                 return (0);
 384         if (type != V_ASN1_UNDEF) {
 385                 if (type == V_ASN1_APP_CHOOSE)
 386                         ne->value->type = ASN1_PRINTABLE_type(bytes, len);
 387                 else
 388                         ne->value->type = type;
 389         }
 390         return (1);
 391 }
 392
 393 ASN1_OBJECT *
 394 X509_NAME_ENTRY_get_object(X509_NAME_ENTRY *ne)
 395 {
 396         if (ne == NULL)
 397                 return (NULL);
 398         return (ne->object);
 399 }
 400
 401 ASN1_STRING *
 402 X509_NAME_ENTRY_get_data(X509_NAME_ENTRY *ne)
 403 {
 404         if (ne == NULL)
 405                 return (NULL);
 406         return (ne->value);
 407 }