crypto/x509/x509_v3.c

   1 /* crypto/x509/x509_v3.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 X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
  70 {
  71     if (x == NULL)
  72         return (0);
  73     return (sk_X509_EXTENSION_num(x));
  74 }
  75
  76 int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
  77                           int lastpos)
  78 {
  79     ASN1_OBJECT *obj;
  80
  81     obj = OBJ_nid2obj(nid);
  82     if (obj == NULL)
  83         return (-2);
  84     return (X509v3_get_ext_by_OBJ(x, obj, lastpos));
  85 }
  86
  87 int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
  88                           ASN1_OBJECT *obj, int lastpos)
  89 {
  90     int n;
  91     X509_EXTENSION *ex;
  92
  93     if (sk == NULL)
  94         return (-1);
  95     lastpos++;
  96     if (lastpos < 0)
  97         lastpos = 0;
  98     n = sk_X509_EXTENSION_num(sk);
  99     for (; lastpos < n; lastpos++) {
 100         ex = sk_X509_EXTENSION_value(sk, lastpos);
 101         if (OBJ_cmp(ex->object, obj) == 0)
 102             return (lastpos);
 103     }
 104     return (-1);
 105 }
 106
 107 int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
 108                                int lastpos)
 109 {
 110     int n;
 111     X509_EXTENSION *ex;
 112
 113     if (sk == NULL)
 114         return (-1);
 115     lastpos++;
 116     if (lastpos < 0)
 117         lastpos = 0;
 118     n = sk_X509_EXTENSION_num(sk);
 119     for (; lastpos < n; lastpos++) {
 120         ex = sk_X509_EXTENSION_value(sk, lastpos);
 121         if (((ex->critical > 0) && crit) || ((ex->critical <= 0) && !crit))
 122             return (lastpos);
 123     }
 124     return (-1);
 125 }
 126
 127 X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
 128 {
 129     if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 130         return NULL;
 131     else
 132         return sk_X509_EXTENSION_value(x, loc);
 133 }
 134
 135 X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
 136 {
 137     X509_EXTENSION *ret;
 138
 139     if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 140         return (NULL);
 141     ret = sk_X509_EXTENSION_delete(x, loc);
 142     return (ret);
 143 }
 144
 145 STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
 146                                          X509_EXTENSION *ex, int loc)
 147 {
 148     X509_EXTENSION *new_ex = NULL;
 149     int n;
 150     STACK_OF(X509_EXTENSION) *sk = NULL;
 151
 152     if (x == NULL) {
 153         X509err(X509_F_X509V3_ADD_EXT, ERR_R_PASSED_NULL_PARAMETER);
 154         goto err2;
 155     }
 156
 157     if (*x == NULL) {
 158         if ((sk = sk_X509_EXTENSION_new_null()) == NULL)
 159             goto err;
 160     } else
 161         sk = *x;
 162
 163     n = sk_X509_EXTENSION_num(sk);
 164     if (loc > n)
 165         loc = n;
 166     else if (loc < 0)
 167         loc = n;
 168
 169     if ((new_ex = X509_EXTENSION_dup(ex)) == NULL)
 170         goto err2;
 171     if (!sk_X509_EXTENSION_insert(sk, new_ex, loc))
 172         goto err;
 173     if (*x == NULL)
 174         *x = sk;
 175     return (sk);
 176  err:
 177     X509err(X509_F_X509V3_ADD_EXT, ERR_R_MALLOC_FAILURE);
 178  err2:
 179     if (new_ex != NULL)
 180         X509_EXTENSION_free(new_ex);
 181     if (sk != NULL)
 182         sk_X509_EXTENSION_free(sk);
 183     return (NULL);
 184 }
 185
 186 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
 187                                              int crit,
 188                                              ASN1_OCTET_STRING *data)
 189 {
 190     ASN1_OBJECT *obj;
 191     X509_EXTENSION *ret;
 192
 193     obj = OBJ_nid2obj(nid);
 194     if (obj == NULL) {
 195         X509err(X509_F_X509_EXTENSION_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 196         return (NULL);
 197     }
 198     ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
 199     if (ret == NULL)
 200         ASN1_OBJECT_free(obj);
 201     return (ret);
 202 }
 203
 204 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
 205                                              ASN1_OBJECT *obj, int crit,
 206                                              ASN1_OCTET_STRING *data)
 207 {
 208     X509_EXTENSION *ret;
 209
 210     if ((ex == NULL) || (*ex == NULL)) {
 211         if ((ret = X509_EXTENSION_new()) == NULL) {
 212             X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,
 213                     ERR_R_MALLOC_FAILURE);
 214             return (NULL);
 215         }
 216     } else
 217         ret = *ex;
 218
 219     if (!X509_EXTENSION_set_object(ret, obj))
 220         goto err;
 221     if (!X509_EXTENSION_set_critical(ret, crit))
 222         goto err;
 223     if (!X509_EXTENSION_set_data(ret, data))
 224         goto err;
 225
 226     if ((ex != NULL) && (*ex == NULL))
 227         *ex = ret;
 228     return (ret);
 229  err:
 230     if ((ex == NULL) || (ret != *ex))
 231         X509_EXTENSION_free(ret);
 232     return (NULL);
 233 }
 234
 235 int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
 236 {
 237     if ((ex == NULL) || (obj == NULL))
 238         return (0);
 239     ASN1_OBJECT_free(ex->object);
 240     ex->object = OBJ_dup(obj);
 241     return (1);
 242 }
 243
 244 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
 245 {
 246     if (ex == NULL)
 247         return (0);
 248     ex->critical = (crit) ? 0xFF : -1;
 249     return (1);
 250 }
 251
 252 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
 253 {
 254     int i;
 255
 256     if (ex == NULL)
 257         return (0);
 258     i = ASN1_OCTET_STRING_set(ex->value, data->data, data->length);
 259     if (!i)
 260         return (0);
 261     return (1);
 262 }
 263
 264 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
 265 {
 266     if (ex == NULL)
 267         return (NULL);
 268     return (ex->object);
 269 }
 270
 271 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
 272 {
 273     if (ex == NULL)
 274         return (NULL);
 275     return (ex->value);
 276 }
 277
 278 int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
 279 {
 280     if (ex == NULL)
 281         return (0);
 282     if (ex->critical > 0)
 283         return 1;
 284     return 0;
 285 }