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
  67 int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
  68         {
  69         if (x == NULL) return(0);
  70         return(sk_X509_EXTENSION_num(x));
  71         }
  72
  73 int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
  74                           int lastpos)
  75         {
  76         ASN1_OBJECT *obj;
  77
  78         obj=OBJ_nid2obj(nid);
  79         if (obj == NULL) return(-2);
  80         return(X509v3_get_ext_by_OBJ(x,obj,lastpos));
  81         }
  82
  83 int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk, ASN1_OBJECT *obj,
  84                           int lastpos)
  85         {
  86         int n;
  87         X509_EXTENSION *ex;
  88
  89         if (sk == NULL) return(-1);
  90         lastpos++;
  91         if (lastpos < 0)
  92                 lastpos=0;
  93         n=sk_X509_EXTENSION_num(sk);
  94         for ( ; lastpos < n; lastpos++)
  95                 {
  96                 ex=sk_X509_EXTENSION_value(sk,lastpos);
  97                 if (OBJ_cmp(ex->object,obj) == 0)
  98                         return(lastpos);
  99                 }
 100         return(-1);
 101         }
 102
 103 int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
 104                                int lastpos)
 105         {
 106         int n;
 107         X509_EXTENSION *ex;
 108
 109         if (sk == NULL) return(-1);
 110         lastpos++;
 111         if (lastpos < 0)
 112                 lastpos=0;
 113         n=sk_X509_EXTENSION_num(sk);
 114         for ( ; lastpos < n; lastpos++)
 115                 {
 116                 ex=sk_X509_EXTENSION_value(sk,lastpos);
 117                 if (    (ex->critical && crit) ||
 118                         (!ex->critical && !crit))
 119                         return(lastpos);
 120                 }
 121         return(-1);
 122         }
 123
 124 X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
 125         {
 126         if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 127                 return NULL;
 128         else
 129                 return sk_X509_EXTENSION_value(x,loc);
 130         }
 131
 132 X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
 133         {
 134         X509_EXTENSION *ret;
 135
 136         if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
 137                 return(NULL);
 138         ret=sk_X509_EXTENSION_delete(x,loc);
 139         return(ret);
 140         }
 141
 142 STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
 143                                          X509_EXTENSION *ex, int loc)
 144         {
 145         X509_EXTENSION *new_ex=NULL;
 146         int n;
 147         STACK_OF(X509_EXTENSION) *sk=NULL;
 148
 149         if ((x != NULL) && (*x == NULL))
 150                 {
 151                 if ((sk=sk_X509_EXTENSION_new_null()) == NULL)
 152                         goto err;
 153                 }
 154         else
 155                 sk= *x;
 156
 157         n=sk_X509_EXTENSION_num(sk);
 158         if (loc > n) loc=n;
 159         else if (loc < 0) loc=n;
 160
 161         if ((new_ex=X509_EXTENSION_dup(ex)) == NULL)
 162                 goto err2;
 163         if (!sk_X509_EXTENSION_insert(sk,new_ex,loc))
 164                 goto err;
 165         if ((x != NULL) && (*x == NULL))
 166                 *x=sk;
 167         return(sk);
 168 err:
 169         X509err(X509_F_X509V3_ADD_EXT,ERR_R_MALLOC_FAILURE);
 170 err2:
 171         if (new_ex != NULL) X509_EXTENSION_free(new_ex);
 172         if (sk != NULL) sk_X509_EXTENSION_free(sk);
 173         return(NULL);
 174         }
 175
 176 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
 177              int crit, ASN1_OCTET_STRING *data)
 178         {
 179         ASN1_OBJECT *obj;
 180         X509_EXTENSION *ret;
 181
 182         obj=OBJ_nid2obj(nid);
 183         if (obj == NULL)
 184                 {
 185                 X509err(X509_F_X509_EXTENSION_CREATE_BY_NID,X509_R_UNKNOWN_NID);
 186                 return(NULL);
 187                 }
 188         ret=X509_EXTENSION_create_by_OBJ(ex,obj,crit,data);
 189         if (ret == NULL) ASN1_OBJECT_free(obj);
 190         return(ret);
 191         }
 192
 193 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
 194              ASN1_OBJECT *obj, int crit, ASN1_OCTET_STRING *data)
 195         {
 196         X509_EXTENSION *ret;
 197
 198         if ((ex == NULL) || (*ex == NULL))
 199                 {
 200                 if ((ret=X509_EXTENSION_new()) == NULL)
 201                         {
 202                         X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);
 203                         return(NULL);
 204                         }
 205                 }
 206         else
 207                 ret= *ex;
 208
 209         if (!X509_EXTENSION_set_object(ret,obj))
 210                 goto err;
 211         if (!X509_EXTENSION_set_critical(ret,crit))
 212                 goto err;
 213         if (!X509_EXTENSION_set_data(ret,data))
 214                 goto err;
 215
 216         if ((ex != NULL) && (*ex == NULL)) *ex=ret;
 217         return(ret);
 218 err:
 219         if ((ex == NULL) || (ret != *ex))
 220                 X509_EXTENSION_free(ret);
 221         return(NULL);
 222         }
 223
 224 int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
 225         {
 226         if ((ex == NULL) || (obj == NULL))
 227                 return(0);
 228         ASN1_OBJECT_free(ex->object);
 229         ex->object=OBJ_dup(obj);
 230         return(1);
 231         }
 232
 233 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
 234         {
 235         if (ex == NULL) return(0);
 236         ex->critical=(crit)?0xFF:0;
 237         return(1);
 238         }
 239
 240 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
 241         {
 242         int i;
 243
 244         if (ex == NULL) return(0);
 245         i=M_ASN1_OCTET_STRING_set(ex->value,data->data,data->length);
 246         if (!i) return(0);
 247         return(1);
 248         }
 249
 250 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
 251         {
 252         if (ex == NULL) return(NULL);
 253         return(ex->object);
 254         }
 255
 256 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
 257         {
 258         if (ex == NULL) return(NULL);
 259         return(ex->value);
 260         }
 261
 262 int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
 263         {
 264         if (ex == NULL) return(0);
 265         return(ex->critical);
 266         }