crypto/x509/x509_v3.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include <openssl/stack.h>
  60 #include "internal/cryptlib.h"
  61 #include <openssl/asn1.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/evp.h>
  64 #include <openssl/x509.h>
  65 #include <openssl/x509v3.h>
  66 #include "x509_lcl.h"
  67
  68 int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
  69 {
  70     if (x == NULL)
  71         return (0);
  72     return (sk_X509_EXTENSION_num(x));
  73 }
  74
  75 int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
  76                           int lastpos)
  77 {
  78     ASN1_OBJECT *obj;
  79
  80     obj = OBJ_nid2obj(nid);
  81     if (obj == NULL)
  82         return (-2);
  83     return (X509v3_get_ext_by_OBJ(x, obj, lastpos));
  84 }
  85
  86 int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
  87                           ASN1_OBJECT *obj, int lastpos)
  88 {
  89     int n;
  90     X509_EXTENSION *ex;
  91
  92     if (sk == NULL)
  93         return (-1);
  94     lastpos++;
  95     if (lastpos < 0)
  96         lastpos = 0;
  97     n = sk_X509_EXTENSION_num(sk);
  98     for (; lastpos < n; lastpos++) {
  99         ex = sk_X509_EXTENSION_value(sk, lastpos);
 100         if (OBJ_cmp(ex->object, obj) == 0)
 101             return (lastpos);
 102     }
 103     return (-1);
 104 }
 105
 106 int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
 107                                int lastpos)
 108 {
 109     int n;
 110     X509_EXTENSION *ex;
 111
 112     if (sk == NULL)
 113         return (-1);
 114     lastpos++;
 115     if (lastpos < 0)
 116         lastpos = 0;
 117     n = sk_X509_EXTENSION_num(sk);
 118     for (; lastpos < n; lastpos++) {
 119         ex = sk_X509_EXTENSION_value(sk, lastpos);
 120         if (((ex->critical > 0) && crit) || ((ex->critical <= 0) && !crit))
 121             return (lastpos);
 122     }
 123     return (-1);
 124 }
 125
 126 X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
 127 {
 128     if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 129         return NULL;
 130     else
 131         return sk_X509_EXTENSION_value(x, loc);
 132 }
 133
 134 X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
 135 {
 136     X509_EXTENSION *ret;
 137
 138     if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 139         return (NULL);
 140     ret = sk_X509_EXTENSION_delete(x, loc);
 141     return (ret);
 142 }
 143
 144 STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
 145                                          X509_EXTENSION *ex, int loc)
 146 {
 147     X509_EXTENSION *new_ex = NULL;
 148     int n;
 149     STACK_OF(X509_EXTENSION) *sk = NULL;
 150
 151     if (x == NULL) {
 152         X509err(X509_F_X509V3_ADD_EXT, ERR_R_PASSED_NULL_PARAMETER);
 153         goto err2;
 154     }
 155
 156     if (*x == NULL) {
 157         if ((sk = sk_X509_EXTENSION_new_null()) == NULL)
 158             goto err;
 159     } else
 160         sk = *x;
 161
 162     n = sk_X509_EXTENSION_num(sk);
 163     if (loc > n)
 164         loc = n;
 165     else if (loc < 0)
 166         loc = n;
 167
 168     if ((new_ex = X509_EXTENSION_dup(ex)) == NULL)
 169         goto err2;
 170     if (!sk_X509_EXTENSION_insert(sk, new_ex, loc))
 171         goto err;
 172     if (*x == NULL)
 173         *x = sk;
 174     return (sk);
 175  err:
 176     X509err(X509_F_X509V3_ADD_EXT, ERR_R_MALLOC_FAILURE);
 177  err2:
 178     X509_EXTENSION_free(new_ex);
 179     sk_X509_EXTENSION_free(sk);
 180     return (NULL);
 181 }
 182
 183 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
 184                                              int crit,
 185                                              ASN1_OCTET_STRING *data)
 186 {
 187     ASN1_OBJECT *obj;
 188     X509_EXTENSION *ret;
 189
 190     obj = OBJ_nid2obj(nid);
 191     if (obj == NULL) {
 192         X509err(X509_F_X509_EXTENSION_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 193         return (NULL);
 194     }
 195     ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
 196     if (ret == NULL)
 197         ASN1_OBJECT_free(obj);
 198     return (ret);
 199 }
 200
 201 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
 202                                              ASN1_OBJECT *obj, int crit,
 203                                              ASN1_OCTET_STRING *data)
 204 {
 205     X509_EXTENSION *ret;
 206
 207     if ((ex == NULL) || (*ex == NULL)) {
 208         if ((ret = X509_EXTENSION_new()) == NULL) {
 209             X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,
 210                     ERR_R_MALLOC_FAILURE);
 211             return (NULL);
 212         }
 213     } else
 214         ret = *ex;
 215
 216     if (!X509_EXTENSION_set_object(ret, obj))
 217         goto err;
 218     if (!X509_EXTENSION_set_critical(ret, crit))
 219         goto err;
 220     if (!X509_EXTENSION_set_data(ret, data))
 221         goto err;
 222
 223     if ((ex != NULL) && (*ex == NULL))
 224         *ex = ret;
 225     return (ret);
 226  err:
 227     if ((ex == NULL) || (ret != *ex))
 228         X509_EXTENSION_free(ret);
 229     return (NULL);
 230 }
 231
 232 int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
 233 {
 234     if ((ex == NULL) || (obj == NULL))
 235         return (0);
 236     ASN1_OBJECT_free(ex->object);
 237     ex->object = OBJ_dup(obj);
 238     return (1);
 239 }
 240
 241 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
 242 {
 243     if (ex == NULL)
 244         return (0);
 245     ex->critical = (crit) ? 0xFF : -1;
 246     return (1);
 247 }
 248
 249 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
 250 {
 251     int i;
 252
 253     if (ex == NULL)
 254         return (0);
 255     i = ASN1_OCTET_STRING_set(&ex->value, data->data, data->length);
 256     if (!i)
 257         return (0);
 258     return (1);
 259 }
 260
 261 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
 262 {
 263     if (ex == NULL)
 264         return (NULL);
 265     return (ex->object);
 266 }
 267
 268 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
 269 {
 270     if (ex == NULL)
 271         return (NULL);
 272     return &ex->value;
 273 }
 274
 275 int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
 276 {
 277     if (ex == NULL)
 278         return (0);
 279     if (ex->critical > 0)
 280         return 1;
 281     return 0;
 282 }