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 #ifndef NOPROTO
  67 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK *extlist);
  68 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK *values);
  69
  70 #else
  71
  72 static STACK *i2v_AUTHORITY_KEYID();
  73 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID();
  74
  75 #endif
  76
  77 X509V3_EXT_METHOD v3_akey_id = {
  78 NID_authority_key_identifier, X509V3_EXT_MULTILINE,
  79 (X509V3_EXT_NEW)AUTHORITY_KEYID_new,
  80 AUTHORITY_KEYID_free,
  81 (X509V3_EXT_D2I)d2i_AUTHORITY_KEYID,
  82 i2d_AUTHORITY_KEYID,
  83 NULL, NULL,
  84 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  85 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  86 NULL,NULL,
  87 NULL
  88 };
  89
  90
  91 /*
  92  * ASN1err(ASN1_F_AUTHORITY_KEYID_NEW,ERR_R_MALLOC_FAILURE);
  93  * ASN1err(ASN1_F_D2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
  94  */
  95
  96 int i2d_AUTHORITY_KEYID(AUTHORITY_KEYID *a, unsigned char **pp)
  97 {
  98         M_ASN1_I2D_vars(a);
  99
 100         M_ASN1_I2D_len_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING);
 101         M_ASN1_I2D_len_IMP_opt (a->issuer, i2d_GENERAL_NAMES);
 102         M_ASN1_I2D_len_IMP_opt (a->serial, i2d_ASN1_INTEGER);
 103
 104         M_ASN1_I2D_seq_total();
 105
 106         M_ASN1_I2D_put_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING, 0);
 107         M_ASN1_I2D_put_IMP_opt (a->issuer, i2d_GENERAL_NAMES, 1);
 108         M_ASN1_I2D_put_IMP_opt (a->serial, i2d_ASN1_INTEGER, 2);
 109
 110         M_ASN1_I2D_finish();
 111 }
 112
 113 AUTHORITY_KEYID *AUTHORITY_KEYID_new(void)
 114 {
 115         AUTHORITY_KEYID *ret=NULL;
 116         ASN1_CTX c;
 117         M_ASN1_New_Malloc(ret, AUTHORITY_KEYID);
 118         ret->keyid = NULL;
 119         ret->issuer = NULL;
 120         ret->serial = NULL;
 121         return (ret);
 122         M_ASN1_New_Error(ASN1_F_AUTHORITY_KEYID_NEW);
 123 }
 124
 125 AUTHORITY_KEYID *d2i_AUTHORITY_KEYID(AUTHORITY_KEYID **a, unsigned char **pp,
 126              long length)
 127 {
 128         M_ASN1_D2I_vars(a,AUTHORITY_KEYID *,AUTHORITY_KEYID_new);
 129         M_ASN1_D2I_Init();
 130         M_ASN1_D2I_start_sequence();
 131         M_ASN1_D2I_get_IMP_opt (ret->keyid, d2i_ASN1_OCTET_STRING, 0,
 132                                                         V_ASN1_OCTET_STRING);
 133         M_ASN1_D2I_get_IMP_opt (ret->issuer, d2i_GENERAL_NAMES, 1,
 134                                                         V_ASN1_SEQUENCE);
 135         M_ASN1_D2I_get_IMP_opt (ret->serial, d2i_ASN1_INTEGER, 2,
 136                                                         V_ASN1_INTEGER);
 137         M_ASN1_D2I_Finish(a, AUTHORITY_KEYID_free, ASN1_F_D2I_AUTHORITY_KEYID);
 138 }
 139
 140 void AUTHORITY_KEYID_free(AUTHORITY_KEYID *a)
 141 {
 142         if (a == NULL) return;
 143         ASN1_OCTET_STRING_free(a->keyid);
 144         sk_GENERAL_NAME_pop_free(a->issuer, GENERAL_NAME_free);
 145         ASN1_INTEGER_free (a->serial);
 146         Free ((char *)a);
 147 }
 148
 149 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 150              AUTHORITY_KEYID *akeyid, STACK *extlist)
 151 {
 152         char *tmp;
 153         if(akeyid->keyid) {
 154                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
 155                 X509V3_add_value("keyid", tmp, &extlist);
 156                 Free(tmp);
 157         }
 158         if(akeyid->issuer)
 159                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
 160         if(akeyid->serial) {
 161                 tmp = hex_to_string(akeyid->serial->data,
 162                                                  akeyid->serial->length);
 163                 X509V3_add_value("serial", tmp, &extlist);
 164                 Free(tmp);
 165         }
 166         return extlist;
 167 }
 168
 169 /* Currently two options:
 170  * keyid: use the issuers subject keyid, the value 'always' means its is
 171  * an error if the issuer certificate doesn't have a key id.
 172  * issuer: use the issuers cert issuer and serial number. The default is
 173  * to only use this if keyid is not present. With the option 'always'
 174  * this is always included.
 175  */
 176
 177 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method,
 178              X509V3_CTX *ctx, STACK *values)
 179 {
 180 char keyid=0, issuer=0;
 181 int i;
 182 CONF_VALUE *cnf;
 183 ASN1_OCTET_STRING *ikeyid = NULL;
 184 X509_NAME *isname = NULL;
 185 STACK_OF(GENERAL_NAME) * gens = NULL;
 186 GENERAL_NAME *gen = NULL;
 187 ASN1_INTEGER *serial = NULL;
 188 X509_EXTENSION *ext;
 189 X509 *cert;
 190 AUTHORITY_KEYID *akeyid;
 191 for(i = 0; i < sk_num(values); i++) {
 192         cnf = (CONF_VALUE *)sk_value(values, i);
 193         if(!strcmp(cnf->name, "keyid")) {
 194                 keyid = 1;
 195                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
 196         } else if(!strcmp(cnf->name, "issuer")) {
 197                 issuer = 1;
 198                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
 199         } else {
 200                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 201                 ERR_add_error_data(2, "name=", cnf->name);
 202                 return NULL;
 203         }
 204 }
 205
 206
 207
 208 if(!ctx || !ctx->issuer_cert) {
 209         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
 210         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 211         return NULL;
 212 }
 213
 214 cert = ctx->issuer_cert;
 215
 216 if(keyid) {
 217         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 218         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 219                                                  ikeyid = X509V3_EXT_d2i(ext);
 220         if(keyid==2 && !ikeyid) {
 221                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 222                 return NULL;
 223         }
 224 }
 225
 226 if((issuer && !ikeyid) || (issuer == 2)) {
 227         isname = X509_NAME_dup(X509_get_issuer_name(cert));
 228         serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 229         if(!isname || !serial) {
 230                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 231                 goto err;
 232         }
 233 }
 234
 235 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 236
 237 if(isname) {
 238         if(!(gens = sk_GENERAL_NAME_new(NULL)) || !(gen = GENERAL_NAME_new())
 239                 || !sk_GENERAL_NAME_push(gens, gen)) {
 240                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 241                 goto err;
 242         }
 243         gen->type = GEN_DIRNAME;
 244         gen->d.dirn = isname;
 245 }
 246
 247 akeyid->issuer = gens;
 248 akeyid->serial = serial;
 249 akeyid->keyid = ikeyid;
 250
 251 return akeyid;
 252
 253 err:
 254 X509_NAME_free(isname);
 255 ASN1_INTEGER_free(serial);
 256 ASN1_OCTET_STRING_free(ikeyid);
 257 return NULL;
 258
 259 }
 260