crypto/x509v3/v3_akey.c

   1 /* v3_akey.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/conf.h>
  62 #include <openssl/asn1.h>
  63 #include <openssl/asn1t.h>
  64 #include <openssl/x509v3.h>
  65
  66 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
  67                         AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist);
  68 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
  69                         X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
  70
  71 const X509V3_EXT_METHOD v3_akey_id =
  72         {
  73         NID_authority_key_identifier,
  74         X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
  75         0,0,0,0,
  76         0,0,
  77         (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  78         (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  79         0,0,
  80         NULL
  81         };
  82
  83 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
  84              AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
  85 {
  86         char *tmp;
  87         if(akeyid->keyid) {
  88                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
  89                 X509V3_add_value("keyid", tmp, &extlist);
  90                 OPENSSL_free(tmp);
  91         }
  92         if(akeyid->issuer)
  93                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
  94         if(akeyid->serial) {
  95                 tmp = hex_to_string(akeyid->serial->data,
  96                                                  akeyid->serial->length);
  97                 X509V3_add_value("serial", tmp, &extlist);
  98                 OPENSSL_free(tmp);
  99         }
 100         return extlist;
 101 }
 102
 103 /*-
 104  * Currently two options:
 105  * keyid: use the issuers subject keyid, the value 'always' means its is
 106  * an error if the issuer certificate doesn't have a key id.
 107  * issuer: use the issuers cert issuer and serial number. The default is
 108  * to only use this if keyid is not present. With the option 'always'
 109  * this is always included.
 110  */
 111
 112 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 113              X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
 114         {
 115         char keyid=0, issuer=0;
 116         int i;
 117         CONF_VALUE *cnf;
 118         ASN1_OCTET_STRING *ikeyid = NULL;
 119         X509_NAME *isname = NULL;
 120         GENERAL_NAMES * gens = NULL;
 121         GENERAL_NAME *gen = NULL;
 122         ASN1_INTEGER *serial = NULL;
 123         X509_EXTENSION *ext;
 124         X509 *cert;
 125         AUTHORITY_KEYID *akeyid;
 126
 127         for(i = 0; i < sk_CONF_VALUE_num(values); i++)
 128                 {
 129                 cnf = sk_CONF_VALUE_value(values, i);
 130                 if(!strcmp(cnf->name, "keyid"))
 131                         {
 132                         keyid = 1;
 133                         if(cnf->value && !strcmp(cnf->value, "always"))
 134                                 keyid = 2;
 135                         }
 136                 else if(!strcmp(cnf->name, "issuer"))
 137                         {
 138                         issuer = 1;
 139                         if(cnf->value && !strcmp(cnf->value, "always"))
 140                                 issuer = 2;
 141                         }
 142                 else
 143                         {
 144                         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 145                         ERR_add_error_data(2, "name=", cnf->name);
 146                         return NULL;
 147                         }
 148                 }
 149
 150         if(!ctx || !ctx->issuer_cert)
 151                 {
 152                 if(ctx && (ctx->flags==CTX_TEST))
 153                         return AUTHORITY_KEYID_new();
 154                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 155                 return NULL;
 156                 }
 157
 158         cert = ctx->issuer_cert;
 159
 160         if(keyid)
 161                 {
 162                 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 163                 if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 164                         ikeyid = X509V3_EXT_d2i(ext);
 165                 if(keyid==2 && !ikeyid)
 166                         {
 167                         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 168                         return NULL;
 169                         }
 170                 }
 171
 172         if((issuer && !ikeyid) || (issuer == 2))
 173                 {
 174                 isname = X509_NAME_dup(X509_get_issuer_name(cert));
 175                 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 176                 if(!isname || !serial)
 177                         {
 178                         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 179                         goto err;
 180                         }
 181                 }
 182
 183         if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 184
 185         if(isname)
 186                 {
 187                 if(!(gens = sk_GENERAL_NAME_new_null())
 188                         || !(gen = GENERAL_NAME_new())
 189                         || !sk_GENERAL_NAME_push(gens, gen))
 190                         {
 191                         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 192                         goto err;
 193                         }
 194                 gen->type = GEN_DIRNAME;
 195                 gen->d.dirn = isname;
 196                 }
 197
 198         akeyid->issuer = gens;
 199         akeyid->serial = serial;
 200         akeyid->keyid = ikeyid;
 201
 202         return akeyid;
 203
 204  err:
 205         X509_NAME_free(isname);
 206         M_ASN1_INTEGER_free(serial);
 207         M_ASN1_OCTET_STRING_free(ikeyid);
 208         return NULL;
 209         }