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 #include "x509_lcl.h"
  68
  69 int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
  70 {
  71     return sk_X509_ATTRIBUTE_num(x);
  72 }
  73
  74 int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
  75                            int lastpos)
  76 {
  77     ASN1_OBJECT *obj;
  78
  79     obj = OBJ_nid2obj(nid);
  80     if (obj == NULL)
  81         return (-2);
  82     return (X509at_get_attr_by_OBJ(x, obj, lastpos));
  83 }
  84
  85 int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
  86                            ASN1_OBJECT *obj, int lastpos)
  87 {
  88     int n;
  89     X509_ATTRIBUTE *ex;
  90
  91     if (sk == NULL)
  92         return (-1);
  93     lastpos++;
  94     if (lastpos < 0)
  95         lastpos = 0;
  96     n = sk_X509_ATTRIBUTE_num(sk);
  97     for (; lastpos < n; lastpos++) {
  98         ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
  99         if (OBJ_cmp(ex->object, obj) == 0)
 100             return (lastpos);
 101     }
 102     return (-1);
 103 }
 104
 105 X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
 106 {
 107     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 108         return NULL;
 109     else
 110         return sk_X509_ATTRIBUTE_value(x, loc);
 111 }
 112
 113 X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
 114 {
 115     X509_ATTRIBUTE *ret;
 116
 117     if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
 118         return (NULL);
 119     ret = sk_X509_ATTRIBUTE_delete(x, loc);
 120     return (ret);
 121 }
 122
 123 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
 124                                            X509_ATTRIBUTE *attr)
 125 {
 126     X509_ATTRIBUTE *new_attr = NULL;
 127     STACK_OF(X509_ATTRIBUTE) *sk = NULL;
 128
 129     if (x == NULL) {
 130         X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);
 131         goto err2;
 132     }
 133
 134     if (*x == NULL) {
 135         if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
 136             goto err;
 137     } else
 138         sk = *x;
 139
 140     if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
 141         goto err2;
 142     if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
 143         goto err;
 144     if (*x == NULL)
 145         *x = sk;
 146     return (sk);
 147  err:
 148     X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_MALLOC_FAILURE);
 149  err2:
 150     X509_ATTRIBUTE_free(new_attr);
 151     sk_X509_ATTRIBUTE_free(sk);
 152     return (NULL);
 153 }
 154
 155 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
 156                                                   **x, const ASN1_OBJECT *obj,
 157                                                   int type,
 158                                                   const unsigned char *bytes,
 159                                                   int len)
 160 {
 161     X509_ATTRIBUTE *attr;
 162     STACK_OF(X509_ATTRIBUTE) *ret;
 163     attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
 164     if (!attr)
 165         return 0;
 166     ret = X509at_add1_attr(x, attr);
 167     X509_ATTRIBUTE_free(attr);
 168     return ret;
 169 }
 170
 171 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
 172                                                   **x, int nid, int type,
 173                                                   const unsigned char *bytes,
 174                                                   int len)
 175 {
 176     X509_ATTRIBUTE *attr;
 177     STACK_OF(X509_ATTRIBUTE) *ret;
 178     attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
 179     if (!attr)
 180         return 0;
 181     ret = X509at_add1_attr(x, attr);
 182     X509_ATTRIBUTE_free(attr);
 183     return ret;
 184 }
 185
 186 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)
 187                                                   **x, const char *attrname,
 188                                                   int type,
 189                                                   const unsigned char *bytes,
 190                                                   int len)
 191 {
 192     X509_ATTRIBUTE *attr;
 193     STACK_OF(X509_ATTRIBUTE) *ret;
 194     attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
 195     if (!attr)
 196         return 0;
 197     ret = X509at_add1_attr(x, attr);
 198     X509_ATTRIBUTE_free(attr);
 199     return ret;
 200 }
 201
 202 void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,
 203                               ASN1_OBJECT *obj, int lastpos, int type)
 204 {
 205     int i;
 206     X509_ATTRIBUTE *at;
 207     i = X509at_get_attr_by_OBJ(x, obj, lastpos);
 208     if (i == -1)
 209         return NULL;
 210     if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
 211         return NULL;
 212     at = X509at_get_attr(x, i);
 213     if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
 214         return NULL;
 215     return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
 216 }
 217
 218 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
 219                                              int atrtype, const void *data,
 220                                              int len)
 221 {
 222     ASN1_OBJECT *obj;
 223     X509_ATTRIBUTE *ret;
 224
 225     obj = OBJ_nid2obj(nid);
 226     if (obj == NULL) {
 227         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 228         return (NULL);
 229     }
 230     ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
 231     if (ret == NULL)
 232         ASN1_OBJECT_free(obj);
 233     return (ret);
 234 }
 235
 236 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
 237                                              const ASN1_OBJECT *obj,
 238                                              int atrtype, const void *data,
 239                                              int len)
 240 {
 241     X509_ATTRIBUTE *ret;
 242
 243     if ((attr == NULL) || (*attr == NULL)) {
 244         if ((ret = X509_ATTRIBUTE_new()) == NULL) {
 245             X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,
 246                     ERR_R_MALLOC_FAILURE);
 247             return (NULL);
 248         }
 249     } else
 250         ret = *attr;
 251
 252     if (!X509_ATTRIBUTE_set1_object(ret, obj))
 253         goto err;
 254     if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
 255         goto err;
 256
 257     if ((attr != NULL) && (*attr == NULL))
 258         *attr = ret;
 259     return (ret);
 260  err:
 261     if ((attr == NULL) || (ret != *attr))
 262         X509_ATTRIBUTE_free(ret);
 263     return (NULL);
 264 }
 265
 266 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
 267                                              const char *atrname, int type,
 268                                              const unsigned char *bytes,
 269                                              int len)
 270 {
 271     ASN1_OBJECT *obj;
 272     X509_ATTRIBUTE *nattr;
 273
 274     obj = OBJ_txt2obj(atrname, 0);
 275     if (obj == NULL) {
 276         X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
 277                 X509_R_INVALID_FIELD_NAME);
 278         ERR_add_error_data(2, "name=", atrname);
 279         return (NULL);
 280     }
 281     nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
 282     ASN1_OBJECT_free(obj);
 283     return nattr;
 284 }
 285
 286 int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
 287 {
 288     if ((attr == NULL) || (obj == NULL))
 289         return (0);
 290     ASN1_OBJECT_free(attr->object);
 291     attr->object = OBJ_dup(obj);
 292     return (1);
 293 }
 294
 295 int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,
 296                              const void *data, int len)
 297 {
 298     ASN1_TYPE *ttmp;
 299     ASN1_STRING *stmp = NULL;
 300     int atype = 0;
 301     if (!attr)
 302         return 0;
 303     if (attrtype & MBSTRING_FLAG) {
 304         stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
 305                                       OBJ_obj2nid(attr->object));
 306         if (!stmp) {
 307             X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
 308             return 0;
 309         }
 310         atype = stmp->type;
 311     } else if (len != -1) {
 312         if ((stmp = ASN1_STRING_type_new(attrtype)) == NULL)
 313             goto err;
 314         if (!ASN1_STRING_set(stmp, data, len))
 315             goto err;
 316         atype = attrtype;
 317     }
 318     /*
 319      * This is a bit naughty because the attribute should really have at
 320      * least one value but some types use and zero length SET and require
 321      * this.
 322      */
 323     if (attrtype == 0)
 324         return 1;
 325     if ((ttmp = ASN1_TYPE_new()) == NULL)
 326         goto err;
 327     if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {
 328         if (!ASN1_TYPE_set1(ttmp, attrtype, data))
 329             goto err;
 330     } else
 331         ASN1_TYPE_set(ttmp, atype, stmp);
 332     if (!sk_ASN1_TYPE_push(attr->set, ttmp))
 333         goto err;
 334     return 1;
 335  err:
 336     X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
 337     return 0;
 338 }
 339
 340 int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
 341 {
 342     if (attr == NULL)
 343         return 0;
 344     return sk_ASN1_TYPE_num(attr->set);
 345 }
 346
 347 ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
 348 {
 349     if (attr == NULL)
 350         return (NULL);
 351     return (attr->object);
 352 }
 353
 354 void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
 355                                int atrtype, void *data)
 356 {
 357     ASN1_TYPE *ttmp;
 358     ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
 359     if (!ttmp)
 360         return NULL;
 361     if (atrtype != ASN1_TYPE_get(ttmp)) {
 362         X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
 363         return NULL;
 364     }
 365     return ttmp->value.ptr;
 366 }
 367
 368 ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
 369 {
 370     if (attr == NULL)
 371         return NULL;
 372     return sk_ASN1_TYPE_value(attr->set, idx);
 373 }