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(STACK *x)
  68         {
  69         if (x == NULL) return(0);
  70         return(sk_num(x));
  71         }
  72
  73 int X509v3_get_ext_by_NID(STACK *x, int nid, int lastpos)
  74         {
  75         ASN1_OBJECT *obj;
  76
  77         obj=OBJ_nid2obj(nid);
  78         if (obj == NULL) return(-2);
  79         return(X509v3_get_ext_by_OBJ(x,obj,lastpos));
  80         }
  81
  82 int X509v3_get_ext_by_OBJ(STACK *sk, ASN1_OBJECT *obj, int lastpos)
  83         {
  84         int n;
  85         X509_EXTENSION *ex;
  86
  87         if (sk == NULL) return(-1);
  88         lastpos++;
  89         if (lastpos < 0)
  90                 lastpos=0;
  91         n=sk_num(sk);
  92         for ( ; lastpos < n; lastpos++)
  93                 {
  94                 ex=(X509_EXTENSION *)sk_value(sk,lastpos);
  95                 if (OBJ_cmp(ex->object,obj) == 0)
  96                         return(lastpos);
  97                 }
  98         return(-1);
  99         }
 100
 101 int X509v3_get_ext_by_critical(STACK *sk, int crit, int lastpos)
 102         {
 103         int n;
 104         X509_EXTENSION *ex;
 105
 106         if (sk == NULL) return(-1);
 107         lastpos++;
 108         if (lastpos < 0)
 109                 lastpos=0;
 110         n=sk_num(sk);
 111         for ( ; lastpos < n; lastpos++)
 112                 {
 113                 ex=(X509_EXTENSION *)sk_value(sk,lastpos);
 114                 if (    (ex->critical && crit) ||
 115                         (!ex->critical && !crit))
 116                         return(lastpos);
 117                 }
 118         return(-1);
 119         }
 120
 121 X509_EXTENSION *X509v3_get_ext(STACK *x, int loc)
 122         {
 123         if ((x == NULL) || (sk_num(x) <= loc) || (loc < 0))
 124                 return(NULL);
 125         else
 126                 return((X509_EXTENSION *)sk_value(x,loc));
 127         }
 128
 129 X509_EXTENSION *X509v3_delete_ext(STACK *x, int loc)
 130         {
 131         X509_EXTENSION *ret;
 132
 133         if ((x == NULL) || (sk_num(x) <= loc) || (loc < 0))
 134                 return(NULL);
 135         ret=(X509_EXTENSION *)sk_delete(x,loc);
 136         return(ret);
 137         }
 138
 139 STACK *X509v3_add_ext(STACK **x, X509_EXTENSION *ex, int loc)
 140         {
 141         X509_EXTENSION *new_ex=NULL;
 142         int n;
 143         STACK *sk=NULL;
 144
 145         if ((x != NULL) && (*x == NULL))
 146                 {
 147                 if ((sk=sk_new_null()) == NULL)
 148                         goto err;
 149                 }
 150         else
 151                 sk= *x;
 152
 153         n=sk_num(sk);
 154         if (loc > n) loc=n;
 155         else if (loc < 0) loc=n;
 156
 157         if ((new_ex=X509_EXTENSION_dup(ex)) == NULL)
 158                 goto err2;
 159         if (!sk_insert(sk,(char *)new_ex,loc))
 160                 goto err;
 161         if ((x != NULL) && (*x == NULL))
 162                 *x=sk;
 163         return(sk);
 164 err:
 165         X509err(X509_F_X509V3_ADD_EXT,ERR_R_MALLOC_FAILURE);
 166 err2:
 167         if (new_ex != NULL) X509_EXTENSION_free(new_ex);
 168         if (sk != NULL) sk_free(sk);
 169         return(NULL);
 170         }
 171
 172 X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
 173              int crit, ASN1_OCTET_STRING *data)
 174         {
 175         ASN1_OBJECT *obj;
 176         X509_EXTENSION *ret;
 177
 178         obj=OBJ_nid2obj(nid);
 179         if (obj == NULL)
 180                 {
 181                 X509err(X509_F_X509_EXTENSION_CREATE_BY_NID,X509_R_UNKNOWN_NID);
 182                 return(NULL);
 183                 }
 184         ret=X509_EXTENSION_create_by_OBJ(ex,obj,crit,data);
 185         if (ret == NULL) ASN1_OBJECT_free(obj);
 186         return(ret);
 187         }
 188
 189 X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
 190              ASN1_OBJECT *obj, int crit, ASN1_OCTET_STRING *data)
 191         {
 192         X509_EXTENSION *ret;
 193
 194         if ((ex == NULL) || (*ex == NULL))
 195                 {
 196                 if ((ret=X509_EXTENSION_new()) == NULL)
 197                         {
 198                         X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);
 199                         return(NULL);
 200                         }
 201                 }
 202         else
 203                 ret= *ex;
 204
 205         if (!X509_EXTENSION_set_object(ret,obj))
 206                 goto err;
 207         if (!X509_EXTENSION_set_critical(ret,crit))
 208                 goto err;
 209         if (!X509_EXTENSION_set_data(ret,data))
 210                 goto err;
 211
 212         if ((ex != NULL) && (*ex == NULL)) *ex=ret;
 213         return(ret);
 214 err:
 215         if ((ex == NULL) || (ret != *ex))
 216                 X509_EXTENSION_free(ret);
 217         return(NULL);
 218         }
 219
 220 int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
 221         {
 222         if ((ex == NULL) || (obj == NULL))
 223                 return(0);
 224         ASN1_OBJECT_free(ex->object);
 225         ex->object=OBJ_dup(obj);
 226         return(1);
 227         }
 228
 229 int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
 230         {
 231         if (ex == NULL) return(0);
 232         ex->critical=(crit)?0xFF:0;
 233         return(1);
 234         }
 235
 236 int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
 237         {
 238         int i;
 239
 240         if (ex == NULL) return(0);
 241         i=ASN1_OCTET_STRING_set(ex->value,data->data,data->length);
 242         if (!i) return(0);
 243         return(1);
 244         }
 245
 246 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
 247         {
 248         if (ex == NULL) return(NULL);
 249         return(ex->object);
 250         }
 251
 252 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
 253         {
 254         if (ex == NULL) return(NULL);
 255         return(ex->value);
 256         }
 257
 258 int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
 259         {
 260         if (ex == NULL) return(0);
 261         return(ex->critical);
 262         }