lib/libcrypto/x509/x509_att.c

   1 /* $OpenBSD: x509_att.c,v 1.17 2018/05/18 19:21:33 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 int
  70 X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
  71 {
  72         return sk_X509_ATTRIBUTE_num(x);
  73 }
  74
  75 int
  76 X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid, int lastpos)
  77 {
  78         ASN1_OBJECT *obj;
  79
  80         obj = OBJ_nid2obj(nid);
  81         if (obj == NULL)
  82                 return (-2);
  83         return (X509at_get_attr_by_OBJ(x, obj, lastpos));
  84 }
  85
  86 int
  87 X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
  88     const ASN1_OBJECT *obj, int lastpos)
  89 {
  90         int n;
  91         X509_ATTRIBUTE *ex;
  92
  93         if (sk == NULL)
  94                 return (-1);
  95         lastpos++;
  96         if (lastpos < 0)
  97                 lastpos = 0;
  98         n = sk_X509_ATTRIBUTE_num(sk);
  99         for (; lastpos < n; lastpos++) {
 100                 ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
 101                 if (OBJ_cmp(ex->object, obj) == 0)
 102                         return (lastpos);
 103         }
 104         return (-1);
 105 }
 106
 107 X509_ATTRIBUTE *
 108 X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
 109 {
 110         if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 111                 return NULL;
 112         else
 113                 return sk_X509_ATTRIBUTE_value(x, loc);
 114 }
 115
 116 X509_ATTRIBUTE *
 117 X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
 118 {
 119         X509_ATTRIBUTE *ret;
 120
 121         if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 122                 return (NULL);
 123         ret = sk_X509_ATTRIBUTE_delete(x, loc);
 124         return (ret);
 125 }
 126
 127 STACK_OF(X509_ATTRIBUTE) *
 128 X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x, X509_ATTRIBUTE *attr)
 129 {
 130         X509_ATTRIBUTE *new_attr = NULL;
 131         STACK_OF(X509_ATTRIBUTE) *sk = NULL;
 132
 133         if (x == NULL) {
 134                 X509error(ERR_R_PASSED_NULL_PARAMETER);
 135                 return (NULL);
 136         }
 137
 138         if (*x == NULL) {
 139                 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
 140                         goto err;
 141         } else
 142                 sk = *x;
 143
 144         if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
 145                 goto err2;
 146         if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
 147                 goto err;
 148         if (*x == NULL)
 149                 *x = sk;
 150         return (sk);
 151
 152 err:
 153         X509error(ERR_R_MALLOC_FAILURE);
 154 err2:
 155         if (new_attr != NULL)
 156                 X509_ATTRIBUTE_free(new_attr);
 157         if (sk != NULL && sk != *x)
 158                 sk_X509_ATTRIBUTE_free(sk);
 159         return (NULL);
 160 }
 161
 162 STACK_OF(X509_ATTRIBUTE) *
 163 X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x, const ASN1_OBJECT *obj,
 164     int type, const unsigned char *bytes, int len)
 165 {
 166         X509_ATTRIBUTE *attr;
 167         STACK_OF(X509_ATTRIBUTE) *ret;
 168
 169         attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
 170         if (!attr)
 171                 return 0;
 172         ret = X509at_add1_attr(x, attr);
 173         X509_ATTRIBUTE_free(attr);
 174         return ret;
 175 }
 176
 177 STACK_OF(X509_ATTRIBUTE) *
 178 X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x, int nid, int type,
 179     const unsigned char *bytes, int len)
 180 {
 181         X509_ATTRIBUTE *attr;
 182         STACK_OF(X509_ATTRIBUTE) *ret;
 183
 184         attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
 185         if (!attr)
 186                 return 0;
 187         ret = X509at_add1_attr(x, attr);
 188         X509_ATTRIBUTE_free(attr);
 189         return ret;
 190 }
 191
 192 STACK_OF(X509_ATTRIBUTE) *
 193 X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x, const char *attrname,
 194     int type, const unsigned char *bytes, int len)
 195 {
 196         X509_ATTRIBUTE *attr;
 197         STACK_OF(X509_ATTRIBUTE) *ret;
 198
 199         attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
 200         if (!attr)
 201                 return 0;
 202         ret = X509at_add1_attr(x, attr);
 203         X509_ATTRIBUTE_free(attr);
 204         return ret;
 205 }
 206
 207 void *
 208 X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x, const ASN1_OBJECT *obj,
 209     int lastpos, int type)
 210 {
 211         int i;
 212         X509_ATTRIBUTE *at;
 213
 214         i = X509at_get_attr_by_OBJ(x, obj, lastpos);
 215         if (i == -1)
 216                 return NULL;
 217         if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
 218                 return NULL;
 219         at = X509at_get_attr(x, i);
 220         if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
 221                 return NULL;
 222         return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
 223 }
 224
 225 X509_ATTRIBUTE *
 226 X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid, int atrtype,
 227     const void *data, int len)
 228 {
 229         ASN1_OBJECT *obj;
 230         X509_ATTRIBUTE *ret;
 231
 232         obj = OBJ_nid2obj(nid);
 233         if (obj == NULL) {
 234                 X509error(X509_R_UNKNOWN_NID);
 235                 return (NULL);
 236         }
 237         ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
 238         if (ret == NULL)
 239                 ASN1_OBJECT_free(obj);
 240         return (ret);
 241 }
 242
 243 X509_ATTRIBUTE *
 244 X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr, const ASN1_OBJECT *obj,
 245     int atrtype, const void *data, int len)
 246 {
 247         X509_ATTRIBUTE *ret;
 248
 249         if ((attr == NULL) || (*attr == NULL)) {
 250                 if ((ret = X509_ATTRIBUTE_new()) == NULL) {
 251                         X509error(ERR_R_MALLOC_FAILURE);
 252                         return (NULL);
 253                 }
 254         } else
 255                 ret= *attr;
 256
 257         if (!X509_ATTRIBUTE_set1_object(ret, obj))
 258                 goto err;
 259         if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
 260                 goto err;
 261
 262         if ((attr != NULL) && (*attr == NULL))
 263                 *attr = ret;
 264         return (ret);
 265
 266 err:
 267         if ((attr == NULL) || (ret != *attr))
 268                 X509_ATTRIBUTE_free(ret);
 269         return (NULL);
 270 }
 271
 272 X509_ATTRIBUTE *
 273 X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr, const char *atrname,
 274     int type, const unsigned char *bytes, int len)
 275 {
 276         ASN1_OBJECT *obj;
 277         X509_ATTRIBUTE *nattr;
 278
 279         obj = OBJ_txt2obj(atrname, 0);
 280         if (obj == NULL) {
 281                 X509error(X509_R_INVALID_FIELD_NAME);
 282                 ERR_asprintf_error_data("name=%s", atrname);
 283                 return (NULL);
 284         }
 285         nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
 286         ASN1_OBJECT_free(obj);
 287         return nattr;
 288 }
 289
 290 int
 291 X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
 292 {
 293         if ((attr == NULL) || (obj == NULL))
 294                 return (0);
 295         ASN1_OBJECT_free(attr->object);
 296         attr->object = OBJ_dup(obj);
 297         return attr->object != NULL;
 298 }
 299
 300 int
 301 X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data,
 302     int len)
 303 {
 304         ASN1_TYPE *ttmp = NULL;
 305         ASN1_STRING *stmp = NULL;
 306         int atype = 0;
 307
 308         if (!attr)
 309                 return 0;
 310         if (attrtype & MBSTRING_FLAG) {
 311                 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
 312                     OBJ_obj2nid(attr->object));
 313                 if (!stmp) {
 314                         X509error(ERR_R_ASN1_LIB);
 315                         return 0;
 316                 }
 317                 atype = stmp->type;
 318         } else if (len != -1){
 319                 if (!(stmp = ASN1_STRING_type_new(attrtype)))
 320                         goto err;
 321                 if (!ASN1_STRING_set(stmp, data, len))
 322                         goto err;
 323                 atype = attrtype;
 324         }
 325         if (!(attr->value.set = sk_ASN1_TYPE_new_null()))
 326                 goto err;
 327         attr->single = 0;
 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->value.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->single)
 359                 return sk_ASN1_TYPE_num(attr->value.set);
 360         if (attr->value.single)
 361                 return 1;
 362         return 0;
 363 }
 364
 365 ASN1_OBJECT *
 366 X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
 367 {
 368         if (attr == NULL)
 369                 return (NULL);
 370         return (attr->object);
 371 }
 372
 373 void *
 374 X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx, int atrtype, void *data)
 375 {
 376         ASN1_TYPE *ttmp;
 377
 378         ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
 379         if (!ttmp)
 380                 return NULL;
 381         if (atrtype != ASN1_TYPE_get(ttmp)){
 382                 X509error(X509_R_WRONG_TYPE);
 383                 return NULL;
 384         }
 385         return ttmp->value.ptr;
 386 }
 387
 388 ASN1_TYPE *
 389 X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
 390 {
 391         if (attr == NULL)
 392                 return (NULL);
 393         if (idx >= X509_ATTRIBUTE_count(attr))
 394                 return NULL;
 395         if (!attr->single)
 396                 return sk_ASN1_TYPE_value(attr->value.set, idx);
 397         else
 398                 return attr->value.single;
 399 }