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/asn1_mac.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,
  73 (X509V3_EXT_NEW)AUTHORITY_KEYID_new,
  74 (X509V3_EXT_FREE)AUTHORITY_KEYID_free,
  75 (X509V3_EXT_D2I)d2i_AUTHORITY_KEYID,
  76 (X509V3_EXT_I2D)i2d_AUTHORITY_KEYID,
  77 NULL, NULL,
  78 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  79 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  80 NULL,NULL,
  81 NULL
  82 };
  83
  84
  85 int i2d_AUTHORITY_KEYID(AUTHORITY_KEYID *a, unsigned char **pp)
  86 {
  87         M_ASN1_I2D_vars(a);
  88
  89         M_ASN1_I2D_len_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING);
  90         M_ASN1_I2D_len_IMP_opt (a->issuer, i2d_GENERAL_NAMES);
  91         M_ASN1_I2D_len_IMP_opt (a->serial, i2d_ASN1_INTEGER);
  92
  93         M_ASN1_I2D_seq_total();
  94
  95         M_ASN1_I2D_put_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING, 0);
  96         M_ASN1_I2D_put_IMP_opt (a->issuer, i2d_GENERAL_NAMES, 1);
  97         M_ASN1_I2D_put_IMP_opt (a->serial, i2d_ASN1_INTEGER, 2);
  98
  99         M_ASN1_I2D_finish();
 100 }
 101
 102 AUTHORITY_KEYID *AUTHORITY_KEYID_new(void)
 103 {
 104         AUTHORITY_KEYID *ret=NULL;
 105         ASN1_CTX c;
 106         M_ASN1_New_Malloc(ret, AUTHORITY_KEYID);
 107         ret->keyid = NULL;
 108         ret->issuer = NULL;
 109         ret->serial = NULL;
 110         return (ret);
 111         M_ASN1_New_Error(ASN1_F_AUTHORITY_KEYID_NEW);
 112 }
 113
 114 AUTHORITY_KEYID *d2i_AUTHORITY_KEYID(AUTHORITY_KEYID **a, unsigned char **pp,
 115              long length)
 116 {
 117         M_ASN1_D2I_vars(a,AUTHORITY_KEYID *,AUTHORITY_KEYID_new);
 118         M_ASN1_D2I_Init();
 119         M_ASN1_D2I_start_sequence();
 120         M_ASN1_D2I_get_IMP_opt (ret->keyid, d2i_ASN1_OCTET_STRING, 0,
 121                                                         V_ASN1_OCTET_STRING);
 122         M_ASN1_D2I_get_IMP_opt (ret->issuer, d2i_GENERAL_NAMES, 1,
 123                                                         V_ASN1_SEQUENCE);
 124         M_ASN1_D2I_get_IMP_opt (ret->serial, d2i_ASN1_INTEGER, 2,
 125                                                         V_ASN1_INTEGER);
 126         M_ASN1_D2I_Finish(a, AUTHORITY_KEYID_free, ASN1_F_D2I_AUTHORITY_KEYID);
 127 }
 128
 129 void AUTHORITY_KEYID_free(AUTHORITY_KEYID *a)
 130 {
 131         if (a == NULL) return;
 132         M_ASN1_OCTET_STRING_free(a->keyid);
 133         sk_GENERAL_NAME_pop_free(a->issuer, GENERAL_NAME_free);
 134         M_ASN1_INTEGER_free (a->serial);
 135         OPENSSL_free (a);
 136 }
 137
 138 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 139              AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist)
 140 {
 141         char *tmp;
 142         if(akeyid->keyid) {
 143                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
 144                 X509V3_add_value("keyid", tmp, &extlist);
 145                 OPENSSL_free(tmp);
 146         }
 147         if(akeyid->issuer)
 148                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
 149         if(akeyid->serial) {
 150                 tmp = hex_to_string(akeyid->serial->data,
 151                                                  akeyid->serial->length);
 152                 X509V3_add_value("serial", tmp, &extlist);
 153                 OPENSSL_free(tmp);
 154         }
 155         return extlist;
 156 }
 157
 158 /* Currently two options:
 159  * keyid: use the issuers subject keyid, the value 'always' means its is
 160  * an error if the issuer certificate doesn't have a key id.
 161  * issuer: use the issuers cert issuer and serial number. The default is
 162  * to only use this if keyid is not present. With the option 'always'
 163  * this is always included.
 164  */
 165
 166 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 167              X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values)
 168 {
 169 char keyid=0, issuer=0;
 170 int i;
 171 CONF_VALUE *cnf;
 172 ASN1_OCTET_STRING *ikeyid = NULL;
 173 X509_NAME *isname = NULL;
 174 STACK_OF(GENERAL_NAME) * gens = NULL;
 175 GENERAL_NAME *gen = NULL;
 176 ASN1_INTEGER *serial = NULL;
 177 X509_EXTENSION *ext;
 178 X509 *cert;
 179 AUTHORITY_KEYID *akeyid;
 180 for(i = 0; i < sk_CONF_VALUE_num(values); i++) {
 181         cnf = sk_CONF_VALUE_value(values, i);
 182         if(!strcmp(cnf->name, "keyid")) {
 183                 keyid = 1;
 184                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
 185         } else if(!strcmp(cnf->name, "issuer")) {
 186                 issuer = 1;
 187                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
 188         } else {
 189                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 190                 ERR_add_error_data(2, "name=", cnf->name);
 191                 return NULL;
 192         }
 193 }
 194
 195
 196
 197 if(!ctx || !ctx->issuer_cert) {
 198         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
 199         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 200         return NULL;
 201 }
 202
 203 cert = ctx->issuer_cert;
 204
 205 if(keyid) {
 206         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 207         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 208                                                  ikeyid = X509V3_EXT_d2i(ext);
 209         if(keyid==2 && !ikeyid) {
 210                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 211                 return NULL;
 212         }
 213 }
 214
 215 if((issuer && !ikeyid) || (issuer == 2)) {
 216         isname = X509_NAME_dup(X509_get_issuer_name(cert));
 217         serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 218         if(!isname || !serial) {
 219                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 220                 goto err;
 221         }
 222 }
 223
 224 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 225
 226 if(isname) {
 227         if(!(gens = sk_GENERAL_NAME_new_null()) || !(gen = GENERAL_NAME_new())
 228                 || !sk_GENERAL_NAME_push(gens, gen)) {
 229                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 230                 goto err;
 231         }
 232         gen->type = GEN_DIRNAME;
 233         gen->d.dirn = isname;
 234 }
 235
 236 akeyid->issuer = gens;
 237 akeyid->serial = serial;
 238 akeyid->keyid = ikeyid;
 239
 240 return akeyid;
 241
 242 err:
 243 X509_NAME_free(isname);
 244 M_ASN1_INTEGER_free(serial);
 245 M_ASN1_OCTET_STRING_free(ikeyid);
 246 return NULL;
 247
 248 }
 249