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 *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK *extlist);
  67 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK *values);
  68
  69 X509V3_EXT_METHOD v3_akey_id = {
  70 NID_authority_key_identifier, X509V3_EXT_MULTILINE,
  71 (X509V3_EXT_NEW)AUTHORITY_KEYID_new,
  72 AUTHORITY_KEYID_free,
  73 (X509V3_EXT_D2I)d2i_AUTHORITY_KEYID,
  74 i2d_AUTHORITY_KEYID,
  75 NULL, NULL,
  76 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  77 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  78 NULL,NULL,
  79 NULL
  80 };
  81
  82
  83 int i2d_AUTHORITY_KEYID(AUTHORITY_KEYID *a, unsigned char **pp)
  84 {
  85         M_ASN1_I2D_vars(a);
  86
  87         M_ASN1_I2D_len_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING);
  88         M_ASN1_I2D_len_IMP_opt (a->issuer, i2d_GENERAL_NAMES);
  89         M_ASN1_I2D_len_IMP_opt (a->serial, i2d_ASN1_INTEGER);
  90
  91         M_ASN1_I2D_seq_total();
  92
  93         M_ASN1_I2D_put_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING, 0);
  94         M_ASN1_I2D_put_IMP_opt (a->issuer, i2d_GENERAL_NAMES, 1);
  95         M_ASN1_I2D_put_IMP_opt (a->serial, i2d_ASN1_INTEGER, 2);
  96
  97         M_ASN1_I2D_finish();
  98 }
  99
 100 AUTHORITY_KEYID *AUTHORITY_KEYID_new(void)
 101 {
 102         AUTHORITY_KEYID *ret=NULL;
 103         ASN1_CTX c;
 104         M_ASN1_New_Malloc(ret, AUTHORITY_KEYID);
 105         ret->keyid = NULL;
 106         ret->issuer = NULL;
 107         ret->serial = NULL;
 108         return (ret);
 109         M_ASN1_New_Error(ASN1_F_AUTHORITY_KEYID_NEW);
 110 }
 111
 112 AUTHORITY_KEYID *d2i_AUTHORITY_KEYID(AUTHORITY_KEYID **a, unsigned char **pp,
 113              long length)
 114 {
 115         M_ASN1_D2I_vars(a,AUTHORITY_KEYID *,AUTHORITY_KEYID_new);
 116         M_ASN1_D2I_Init();
 117         M_ASN1_D2I_start_sequence();
 118         M_ASN1_D2I_get_IMP_opt (ret->keyid, d2i_ASN1_OCTET_STRING, 0,
 119                                                         V_ASN1_OCTET_STRING);
 120         M_ASN1_D2I_get_IMP_opt (ret->issuer, d2i_GENERAL_NAMES, 1,
 121                                                         V_ASN1_SEQUENCE);
 122         M_ASN1_D2I_get_IMP_opt (ret->serial, d2i_ASN1_INTEGER, 2,
 123                                                         V_ASN1_INTEGER);
 124         M_ASN1_D2I_Finish(a, AUTHORITY_KEYID_free, ASN1_F_D2I_AUTHORITY_KEYID);
 125 }
 126
 127 void AUTHORITY_KEYID_free(AUTHORITY_KEYID *a)
 128 {
 129         if (a == NULL) return;
 130         ASN1_OCTET_STRING_free(a->keyid);
 131         sk_GENERAL_NAME_pop_free(a->issuer, GENERAL_NAME_free);
 132         ASN1_INTEGER_free (a->serial);
 133         Free ((char *)a);
 134 }
 135
 136 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 137              AUTHORITY_KEYID *akeyid, STACK *extlist)
 138 {
 139         char *tmp;
 140         if(akeyid->keyid) {
 141                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
 142                 X509V3_add_value("keyid", tmp, &extlist);
 143                 Free(tmp);
 144         }
 145         if(akeyid->issuer)
 146                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
 147         if(akeyid->serial) {
 148                 tmp = hex_to_string(akeyid->serial->data,
 149                                                  akeyid->serial->length);
 150                 X509V3_add_value("serial", tmp, &extlist);
 151                 Free(tmp);
 152         }
 153         return extlist;
 154 }
 155
 156 /* Currently two options:
 157  * keyid: use the issuers subject keyid, the value 'always' means its is
 158  * an error if the issuer certificate doesn't have a key id.
 159  * issuer: use the issuers cert issuer and serial number. The default is
 160  * to only use this if keyid is not present. With the option 'always'
 161  * this is always included.
 162  */
 163
 164 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 165              X509V3_CTX *ctx, STACK *values)
 166 {
 167 char keyid=0, issuer=0;
 168 int i;
 169 CONF_VALUE *cnf;
 170 ASN1_OCTET_STRING *ikeyid = NULL;
 171 X509_NAME *isname = NULL;
 172 STACK_OF(GENERAL_NAME) * gens = NULL;
 173 GENERAL_NAME *gen = NULL;
 174 ASN1_INTEGER *serial = NULL;
 175 X509_EXTENSION *ext;
 176 X509 *cert;
 177 AUTHORITY_KEYID *akeyid;
 178 for(i = 0; i < sk_num(values); i++) {
 179         cnf = (CONF_VALUE *)sk_value(values, i);
 180         if(!strcmp(cnf->name, "keyid")) {
 181                 keyid = 1;
 182                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
 183         } else if(!strcmp(cnf->name, "issuer")) {
 184                 issuer = 1;
 185                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
 186         } else {
 187                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 188                 ERR_add_error_data(2, "name=", cnf->name);
 189                 return NULL;
 190         }
 191 }
 192
 193
 194
 195 if(!ctx || !ctx->issuer_cert) {
 196         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
 197         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 198         return NULL;
 199 }
 200
 201 cert = ctx->issuer_cert;
 202
 203 if(keyid) {
 204         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 205         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 206                                                  ikeyid = X509V3_EXT_d2i(ext);
 207         if(keyid==2 && !ikeyid) {
 208                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 209                 return NULL;
 210         }
 211 }
 212
 213 if((issuer && !ikeyid) || (issuer == 2)) {
 214         isname = X509_NAME_dup(X509_get_issuer_name(cert));
 215         serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 216         if(!isname || !serial) {
 217                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 218                 goto err;
 219         }
 220 }
 221
 222 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 223
 224 if(isname) {
 225         if(!(gens = sk_GENERAL_NAME_new(NULL)) || !(gen = GENERAL_NAME_new())
 226                 || !sk_GENERAL_NAME_push(gens, gen)) {
 227                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 228                 goto err;
 229         }
 230         gen->type = GEN_DIRNAME;
 231         gen->d.dirn = isname;
 232 }
 233
 234 akeyid->issuer = gens;
 235 akeyid->serial = serial;
 236 akeyid->keyid = ikeyid;
 237
 238 return akeyid;
 239
 240 err:
 241 X509_NAME_free(isname);
 242 ASN1_INTEGER_free(serial);
 243 ASN1_OCTET_STRING_free(ikeyid);
 244 return NULL;
 245
 246 }
 247