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
  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     if (new_ex != NULL)
 179         X509_EXTENSION_free(new_ex);
 180     if (x != NULL && *x == NULL && sk != NULL)
 181         sk_X509_EXTENSION_free(sk);
 182     return (NULL);
 183 }
 184
 185 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
 186                                              int crit,
 187                                              ASN1_OCTET_STRING *data)
 188 {
 189     ASN1_OBJECT *obj;
 190     X509_EXTENSION *ret;
 191
 192     obj = OBJ_nid2obj(nid);
 193     if (obj == NULL) {
 194         X509err(X509_F_X509_EXTENSION_CREATE_BY_NID, X509_R_UNKNOWN_NID);
 195         return (NULL);
 196     }
 197     ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
 198     if (ret == NULL)
 199         ASN1_OBJECT_free(obj);
 200     return (ret);
 201 }
 202
 203 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
 204                                              ASN1_OBJECT *obj, int crit,
 205                                              ASN1_OCTET_STRING *data)
 206 {
 207     X509_EXTENSION *ret;
 208
 209     if ((ex == NULL) || (*ex == NULL)) {
 210         if ((ret = X509_EXTENSION_new()) == NULL) {
 211             X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,
 212                     ERR_R_MALLOC_FAILURE);
 213             return (NULL);
 214         }
 215     } else
 216         ret = *ex;
 217
 218     if (!X509_EXTENSION_set_object(ret, obj))
 219         goto err;
 220     if (!X509_EXTENSION_set_critical(ret, crit))
 221         goto err;
 222     if (!X509_EXTENSION_set_data(ret, data))
 223         goto err;
 224
 225     if ((ex != NULL) && (*ex == NULL))
 226         *ex = ret;
 227     return (ret);
 228  err:
 229     if ((ex == NULL) || (ret != *ex))
 230         X509_EXTENSION_free(ret);
 231     return (NULL);
 232 }
 233
 234 int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
 235 {
 236     if ((ex == NULL) || (obj == NULL))
 237         return (0);
 238     ASN1_OBJECT_free(ex->object);
 239     ex->object = OBJ_dup(obj);
 240     return (1);
 241 }
 242
 243 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
 244 {
 245     if (ex == NULL)
 246         return (0);
 247     ex->critical = (crit) ? 0xFF : -1;
 248     return (1);
 249 }
 250
 251 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
 252 {
 253     int i;
 254
 255     if (ex == NULL)
 256         return (0);
 257     i = M_ASN1_OCTET_STRING_set(ex->value, data->data, data->length);
 258     if (!i)
 259         return (0);
 260     return (1);
 261 }
 262
 263 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
 264 {
 265     if (ex == NULL)
 266         return (NULL);
 267     return (ex->object);
 268 }
 269
 270 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
 271 {
 272     if (ex == NULL)
 273         return (NULL);
 274     return (ex->value);
 275 }
 276
 277 int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
 278 {
 279     if (ex == NULL)
 280         return (0);
 281     if (ex->critical > 0)
 282         return 1;
 283     return 0;
 284 }