crypto/x509/x509_att.c

   1 /* crypto/x509/x509_att.c */
   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 <openssl/stack.h>
  61 #include "cryptlib.h"
  62 #include <openssl/asn1.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/evp.h>
  65 #include <openssl/x509.h>
  66 #include <openssl/x509v3.h>
  67
  68 int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
  69 {
  70     return sk_X509_ATTRIBUTE_num(x);
  71 }
  72
  73 int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
  74                            int lastpos)
  75 {
  76     ASN1_OBJECT *obj;
  77
  78     obj = OBJ_nid2obj(nid);
  79     if (obj == NULL)
  80         return (-2);
  81     return (X509at_get_attr_by_OBJ(x, obj, lastpos));
  82 }
  83
  84 int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
  85                            ASN1_OBJECT *obj, int lastpos)
  86 {
  87     int n;
  88     X509_ATTRIBUTE *ex;
  89
  90     if (sk == NULL)
  91         return (-1);
  92     lastpos++;
  93     if (lastpos < 0)
  94         lastpos = 0;
  95     n = sk_X509_ATTRIBUTE_num(sk);
  96     for (; lastpos < n; lastpos++) {
  97         ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
  98         if (OBJ_cmp(ex->object, obj) == 0)
  99             return (lastpos);
 100     }
 101     return (-1);
 102 }
 103
 104 X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
 105 {
 106     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 107         return NULL;
 108     else
 109         return sk_X509_ATTRIBUTE_value(x, loc);
 110 }
 111
 112 X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
 113 {
 114     X509_ATTRIBUTE *ret;
 115
 116     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 117         return (NULL);
 118     ret = sk_X509_ATTRIBUTE_delete(x, loc);
 119     return (ret);
 120 }
 121
 122 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
 123                                            X509_ATTRIBUTE *attr)
 124 {
 125     X509_ATTRIBUTE *new_attr = NULL;
 126     STACK_OF(X509_ATTRIBUTE) *sk = NULL;
 127
 128     if (x == NULL) {
 129         X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);
 130         goto err2;
 131     }
 132
 133     if (*x == NULL) {
 134         if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
 135             goto err;
 136     } else
 137         sk = *x;
 138
 139     if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
 140         goto err2;
 141     if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
 142         goto err;
 143     if (*x == NULL)
 144         *x = sk;
 145     return (sk);
 146  err:
 147     X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_MALLOC_FAILURE);
 148  err2:
 149     if (new_attr != NULL)
 150         X509_ATTRIBUTE_free(new_attr);
 151     if (sk != NULL)
 152         sk_X509_ATTRIBUTE_free(sk);
 153     return (NULL);
 154 }
 155
 156 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
 157                                                   **x, const ASN1_OBJECT *obj,
 158                                                   int type,
 159                                                   const unsigned char *bytes,
 160                                                   int len)
 161 {
 162     X509_ATTRIBUTE *attr;
 163     STACK_OF(X509_ATTRIBUTE) *ret;
 164     attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
 165     if (!attr)
 166         return 0;
 167     ret = X509at_add1_attr(x, attr);
 168     X509_ATTRIBUTE_free(attr);
 169     return ret;
 170 }
 171
 172 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
 173                                                   **x, int nid, int type,
 174                                                   const unsigned char *bytes,
 175                                                   int len)
 176 {
 177     X509_ATTRIBUTE *attr;
 178     STACK_OF(X509_ATTRIBUTE) *ret;
 179     attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
 180     if (!attr)
 181         return 0;
 182     ret = X509at_add1_attr(x, attr);
 183     X509_ATTRIBUTE_free(attr);
 184     return ret;
 185 }
 186
 187 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)
 188                                                   **x, const char *attrname,
 189                                                   int type,
 190                                                   const unsigned char *bytes,
 191                                                   int len)
 192 {
 193     X509_ATTRIBUTE *attr;
 194     STACK_OF(X509_ATTRIBUTE) *ret;
 195     attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
 196     if (!attr)
 197         return 0;
 198     ret = X509at_add1_attr(x, attr);
 199     X509_ATTRIBUTE_free(attr);
 200     return ret;
 201 }
 202
 203 void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,
 204                               ASN1_OBJECT *obj, int lastpos, int type)
 205 {
 206     int i;
 207     X509_ATTRIBUTE *at;
 208     i = X509at_get_attr_by_OBJ(x, obj, lastpos);
 209     if (i == -1)
 210         return NULL;
 211     if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
 212         return NULL;
 213     at = X509at_get_attr(x, i);
 214     if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
 215         return NULL;
 216     return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
 217 }
 218
 219 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
 220                                              int atrtype, const void *data,
 221                                              int len)
 222 {
 223     ASN1_OBJECT *obj;
 224     X509_ATTRIBUTE *ret;
 225
 226     obj = OBJ_nid2obj(nid);
 227     if (obj == NULL) {
 228         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 229         return (NULL);
 230     }
 231     ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
 232     if (ret == NULL)
 233         ASN1_OBJECT_free(obj);
 234     return (ret);
 235 }
 236
 237 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
 238                                              const ASN1_OBJECT *obj,
 239                                              int atrtype, const void *data,
 240                                              int len)
 241 {
 242     X509_ATTRIBUTE *ret;
 243
 244     if ((attr == NULL) || (*attr == NULL)) {
 245         if ((ret = X509_ATTRIBUTE_new()) == NULL) {
 246             X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,
 247                     ERR_R_MALLOC_FAILURE);
 248             return (NULL);
 249         }
 250     } else
 251         ret = *attr;
 252
 253     if (!X509_ATTRIBUTE_set1_object(ret, obj))
 254         goto err;
 255     if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
 256         goto err;
 257
 258     if ((attr != NULL) && (*attr == NULL))
 259         *attr = ret;
 260     return (ret);
 261  err:
 262     if ((attr == NULL) || (ret != *attr))
 263         X509_ATTRIBUTE_free(ret);
 264     return (NULL);
 265 }
 266
 267 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
 268                                              const char *atrname, int type,
 269                                              const unsigned char *bytes,
 270                                              int len)
 271 {
 272     ASN1_OBJECT *obj;
 273     X509_ATTRIBUTE *nattr;
 274
 275     obj = OBJ_txt2obj(atrname, 0);
 276     if (obj == NULL) {
 277         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
 278                 X509_R_INVALID_FIELD_NAME);
 279         ERR_add_error_data(2, "name=", atrname);
 280         return (NULL);
 281     }
 282     nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
 283     ASN1_OBJECT_free(obj);
 284     return nattr;
 285 }
 286
 287 int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
 288 {
 289     if ((attr == NULL) || (obj == NULL))
 290         return (0);
 291     ASN1_OBJECT_free(attr->object);
 292     attr->object = OBJ_dup(obj);
 293     return (1);
 294 }
 295
 296 int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,
 297                              const void *data, int len)
 298 {
 299     ASN1_TYPE *ttmp;
 300     ASN1_STRING *stmp = NULL;
 301     int atype = 0;
 302     if (!attr)
 303         return 0;
 304     if (attrtype & MBSTRING_FLAG) {
 305         stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
 306                                       OBJ_obj2nid(attr->object));
 307         if (!stmp) {
 308             X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
 309             return 0;
 310         }
 311         atype = stmp->type;
 312     } else if (len != -1) {
 313         if (!(stmp = ASN1_STRING_type_new(attrtype)))
 314             goto err;
 315         if (!ASN1_STRING_set(stmp, data, len))
 316             goto err;
 317         atype = attrtype;
 318     }
 319     if (!(attr->value.set = sk_ASN1_TYPE_new_null()))
 320         goto err;
 321     attr->single = 0;
 322     /*
 323      * This is a bit naughty because the attribute should really have at
 324      * least one value but some types use and zero length SET and require
 325      * this.
 326      */
 327     if (attrtype == 0)
 328         return 1;
 329     if (!(ttmp = ASN1_TYPE_new()))
 330         goto err;
 331     if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {
 332         if (!ASN1_TYPE_set1(ttmp, attrtype, data))
 333             goto err;
 334     } else
 335         ASN1_TYPE_set(ttmp, atype, stmp);
 336     if (!sk_ASN1_TYPE_push(attr->value.set, ttmp))
 337         goto err;
 338     return 1;
 339  err:
 340     X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
 341     return 0;
 342 }
 343
 344 int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
 345 {
 346     if (!attr->single)
 347         return sk_ASN1_TYPE_num(attr->value.set);
 348     if (attr->value.single)
 349         return 1;
 350     return 0;
 351 }
 352
 353 ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
 354 {
 355     if (attr == NULL)
 356         return (NULL);
 357     return (attr->object);
 358 }
 359
 360 void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
 361                                int atrtype, void *data)
 362 {
 363     ASN1_TYPE *ttmp;
 364     ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
 365     if (!ttmp)
 366         return NULL;
 367     if (atrtype != ASN1_TYPE_get(ttmp)) {
 368         X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
 369         return NULL;
 370     }
 371     return ttmp->value.ptr;
 372 }
 373
 374 ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
 375 {
 376     if (attr == NULL)
 377         return (NULL);
 378     if (idx >= X509_ATTRIBUTE_count(attr))
 379         return NULL;
 380     if (!attr->single)
 381         return sk_ASN1_TYPE_value(attr->value.set, idx);
 382     else
 383         return attr->value.single;
 384 }