crypto/x509v3/v3_akey.c

   1 /* v3_akey.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 X509V3_EXT_METHOD v3_akey_id = {
  72 NID_authority_key_identifier, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID),
  73 0,0,0,0,
  74 0,0,
  75 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  76 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  77 0,0,
  78 NULL
  79 };
  80
  81 ASN1_SEQUENCE(AUTHORITY_KEYID) = {
  82         ASN1_IMP_OPT(AUTHORITY_KEYID, keyid, ASN1_OCTET_STRING, 0),
  83         ASN1_IMP_SEQUENCE_OF_OPT(AUTHORITY_KEYID, issuer, GENERAL_NAME, 1),
  84         ASN1_IMP_OPT(AUTHORITY_KEYID, serial, ASN1_INTEGER, 2)
  85 } ASN1_SEQUENCE_END(AUTHORITY_KEYID)
  86
  87 IMPLEMENT_ASN1_FUNCTIONS(AUTHORITY_KEYID)
  88
  89 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
  90              AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
  91 {
  92         char *tmp;
  93         if(akeyid->keyid) {
  94                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
  95                 X509V3_add_value("keyid", tmp, &extlist);
  96                 OPENSSL_free(tmp);
  97         }
  98         if(akeyid->issuer)
  99                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
 100         if(akeyid->serial) {
 101                 tmp = hex_to_string(akeyid->serial->data,
 102                                                  akeyid->serial->length);
 103                 X509V3_add_value("serial", tmp, &extlist);
 104                 OPENSSL_free(tmp);
 105         }
 106         return extlist;
 107 }
 108
 109 /* Currently two options:
 110  * keyid: use the issuers subject keyid, the value 'always' means its is
 111  * an error if the issuer certificate doesn't have a key id.
 112  * issuer: use the issuers cert issuer and serial number. The default is
 113  * to only use this if keyid is not present. With the option 'always'
 114  * this is always included.
 115  */
 116
 117 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 118              X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
 119 {
 120 char keyid=0, issuer=0;
 121 int i;
 122 CONF_VALUE *cnf;
 123 ASN1_OCTET_STRING *ikeyid = NULL;
 124 X509_NAME *isname = NULL;
 125 GENERAL_NAMES * gens = NULL;
 126 GENERAL_NAME *gen = NULL;
 127 ASN1_INTEGER *serial = NULL;
 128 X509_EXTENSION *ext;
 129 X509 *cert;
 130 AUTHORITY_KEYID *akeyid;
 131 for(i = 0; i < sk_CONF_VALUE_num(values); i++) {
 132         cnf = sk_CONF_VALUE_value(values, i);
 133         if(!strcmp(cnf->name, "keyid")) {
 134                 keyid = 1;
 135                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
 136         } else if(!strcmp(cnf->name, "issuer")) {
 137                 issuer = 1;
 138                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
 139         } else {
 140                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 141                 ERR_add_error_data(2, "name=", cnf->name);
 142                 return NULL;
 143         }
 144 }
 145
 146 if(!ctx || !ctx->issuer_cert) {
 147         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
 148         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 149         return NULL;
 150 }
 151
 152 cert = ctx->issuer_cert;
 153
 154 if(keyid) {
 155         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 156         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 157                                                  ikeyid = X509V3_EXT_d2i(ext);
 158         if(keyid==2 && !ikeyid) {
 159                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 160                 return NULL;
 161         }
 162 }
 163
 164 if((issuer && !ikeyid) || (issuer == 2)) {
 165         isname = X509_NAME_dup(X509_get_issuer_name(cert));
 166         serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 167         if(!isname || !serial) {
 168                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 169                 goto err;
 170         }
 171 }
 172
 173 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 174
 175 if(isname) {
 176         if(!(gens = sk_GENERAL_NAME_new_null()) || !(gen = GENERAL_NAME_new())
 177                 || !sk_GENERAL_NAME_push(gens, gen)) {
 178                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 179                 goto err;
 180         }
 181         gen->type = GEN_DIRNAME;
 182         gen->d.dirn = isname;
 183 }
 184
 185 akeyid->issuer = gens;
 186 akeyid->serial = serial;
 187 akeyid->keyid = ikeyid;
 188
 189 return akeyid;
 190
 191 err:
 192 X509_NAME_free(isname);
 193 M_ASN1_INTEGER_free(serial);
 194 M_ASN1_OCTET_STRING_free(ikeyid);
 195 return NULL;
 196
 197 }
 198