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 <stdlib.h>
  61 #include <pem.h>
  62 #include <asn1_mac.h>
  63 #include <err.h>
  64 #include <objects.h>
  65 #include <conf.h>
  66 #include "x509v3.h"
  67
  68 #ifndef NOPROTO
  69 static STACK *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK *extlist);
  70 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK *values);
  71
  72 #else
  73
  74 static STACK *i2v_AUTHORITY_KEYID();
  75 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID();
  76
  77 #endif
  78
  79 X509V3_EXT_METHOD v3_akey_id = {
  80 NID_authority_key_identifier, 0,
  81 (X509V3_EXT_NEW)AUTHORITY_KEYID_new,
  82 AUTHORITY_KEYID_free,
  83 (X509V3_EXT_D2I)d2i_AUTHORITY_KEYID,
  84 i2d_AUTHORITY_KEYID,
  85 NULL, NULL,
  86 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID,
  87 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID,
  88 NULL,
  89 NULL
  90 };
  91
  92
  93 /*
  94  * ASN1err(ASN1_F_AUTHORITY_KEYID_NEW,ERR_R_MALLOC_FAILURE);
  95  * ASN1err(ASN1_F_D2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
  96  */
  97
  98 int i2d_AUTHORITY_KEYID(a,pp)
  99 AUTHORITY_KEYID *a;
 100 unsigned char **pp;
 101 {
 102         M_ASN1_I2D_vars(a);
 103
 104         M_ASN1_I2D_len_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING);
 105         M_ASN1_I2D_len_IMP_opt (a->issuer, i2d_GENERAL_NAMES);
 106         M_ASN1_I2D_len_IMP_opt (a->serial, i2d_ASN1_INTEGER);
 107
 108         M_ASN1_I2D_seq_total();
 109
 110         M_ASN1_I2D_put_IMP_opt (a->keyid, i2d_ASN1_OCTET_STRING, 0);
 111         M_ASN1_I2D_put_IMP_opt (a->issuer, i2d_GENERAL_NAMES, 1);
 112         M_ASN1_I2D_put_IMP_opt (a->serial, i2d_ASN1_INTEGER, 2);
 113
 114         M_ASN1_I2D_finish();
 115 }
 116
 117 AUTHORITY_KEYID *AUTHORITY_KEYID_new()
 118 {
 119         AUTHORITY_KEYID *ret=NULL;
 120         ASN1_CTX c;
 121         M_ASN1_New_Malloc(ret, AUTHORITY_KEYID);
 122         ret->keyid = NULL;
 123         ret->issuer = NULL;
 124         ret->serial = NULL;
 125         return (ret);
 126         M_ASN1_New_Error(ASN1_F_AUTHORITY_KEYID_NEW);
 127 }
 128
 129 AUTHORITY_KEYID *d2i_AUTHORITY_KEYID(a,pp,length)
 130 AUTHORITY_KEYID **a;
 131 unsigned char **pp;
 132 long length;
 133 {
 134         M_ASN1_D2I_vars(a,AUTHORITY_KEYID *,AUTHORITY_KEYID_new);
 135         M_ASN1_D2I_Init();
 136         M_ASN1_D2I_start_sequence();
 137         M_ASN1_D2I_get_IMP_opt (ret->keyid, d2i_ASN1_OCTET_STRING, 0,
 138                                                         V_ASN1_OCTET_STRING);
 139         M_ASN1_D2I_get_IMP_opt (ret->issuer, d2i_GENERAL_NAMES, 1,
 140                                                         V_ASN1_SEQUENCE);
 141         M_ASN1_D2I_get_IMP_opt (ret->serial, d2i_ASN1_INTEGER, 2,
 142                                                         V_ASN1_INTEGER);
 143         M_ASN1_D2I_Finish(a, AUTHORITY_KEYID_free, ASN1_F_D2I_AUTHORITY_KEYID);
 144 }
 145
 146 void AUTHORITY_KEYID_free(a)
 147 AUTHORITY_KEYID *a;
 148 {
 149         if (a == NULL) return;
 150         ASN1_OCTET_STRING_free(a->keyid);
 151         sk_pop_free(a->issuer, GENERAL_NAME_free);
 152         ASN1_INTEGER_free (a->serial);
 153         Free ((char *)a);
 154 }
 155
 156 static STACK *i2v_AUTHORITY_KEYID(method, akeyid, extlist)
 157 X509V3_EXT_METHOD *method;
 158 AUTHORITY_KEYID *akeyid;
 159 STACK *extlist;
 160 {
 161         char *tmp;
 162         if(akeyid->keyid) {
 163                 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length);
 164                 X509V3_add_value("keyid", tmp, &extlist);
 165                 Free(tmp);
 166         }
 167         if(akeyid->issuer)
 168                 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist);
 169         if(akeyid->serial) {
 170                 tmp = hex_to_string(akeyid->serial->data,
 171                                                  akeyid->serial->length);
 172                 X509V3_add_value("serial", tmp, &extlist);
 173                 Free(tmp);
 174         }
 175         return extlist;
 176 }
 177
 178 /* Currently two options:
 179  * keyid: use the issuers subject keyid, the value 'always' means its is
 180  * an error if the issuer certificate doesn't have a key id.
 181  * issuer: use the issuers cert issuer and serial number. The default is
 182  * to only use this if keyid is not present. With the option 'always'
 183  * this is always included.
 184  */
 185
 186 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(method, ctx, values)
 187 X509V3_EXT_METHOD *method;
 188 X509V3_CTX *ctx;
 189 STACK *values;
 190 {
 191 char keyid=0, issuer=0;
 192 int i;
 193 CONF_VALUE *cnf;
 194 ASN1_OCTET_STRING *ikeyid = NULL;
 195 X509_NAME *isname = NULL;
 196 STACK * gens = NULL;
 197 GENERAL_NAME *gen = NULL;
 198 ASN1_INTEGER *serial = NULL;
 199 X509_EXTENSION *ext;
 200 X509 *cert;
 201 AUTHORITY_KEYID *akeyid;
 202 for(i = 0; i < sk_num(values); i++) {
 203         cnf = (CONF_VALUE *)sk_value(values, i);
 204         if(!strcmp(cnf->name, "keyid")) {
 205                 keyid = 1;
 206                 if(cnf->value && !strcmp(cnf->value, "always")) keyid = 2;
 207         } else if(!strcmp(cnf->name, "issuer")) {
 208                 issuer = 1;
 209                 if(cnf->value && !strcmp(cnf->value, "always")) issuer = 2;
 210         } else {
 211                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION);
 212                 ERR_add_error_data(2, "name=", cnf->name);
 213                 return NULL;
 214         }
 215 }
 216
 217
 218
 219 if(!ctx || !ctx->issuer_cert) {
 220         if(ctx && (ctx->flags==CTX_TEST)) return AUTHORITY_KEYID_new();
 221         X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE);
 222         return NULL;
 223 }
 224
 225 cert = ctx->issuer_cert;
 226
 227 if(keyid) {
 228         i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1);
 229         if((i >= 0)  && (ext = X509_get_ext(cert, i)))
 230                         ikeyid = (ASN1_OCTET_STRING *) X509V3_EXT_d2i(ext);
 231         if(keyid==2 && !ikeyid) {
 232                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID);
 233                 return NULL;
 234         }
 235 }
 236
 237 if((issuer && !ikeyid) || (issuer == 2)) {
 238         isname = X509_NAME_dup(X509_get_issuer_name(cert));
 239         serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert));
 240         if(!isname || !serial) {
 241                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS);
 242                 goto err;
 243         }
 244 }
 245
 246 if(!(akeyid = AUTHORITY_KEYID_new())) goto err;
 247
 248 if(isname) {
 249         if(!(gens = sk_new(NULL)) || !(gen = GENERAL_NAME_new())
 250                 || !sk_push(gens, (char *)gen)) {
 251                 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE);
 252                 goto err;
 253         }
 254         gen->type = GEN_DIRNAME;
 255         gen->d.dirn = isname;
 256 }
 257
 258 akeyid->issuer = gens;
 259 akeyid->serial = serial;
 260 akeyid->keyid = ikeyid;
 261
 262 return akeyid;
 263
 264 err:
 265 X509_NAME_free(isname);
 266 ASN1_INTEGER_free(serial);
 267 ASN1_OCTET_STRING_free(ikeyid);
 268 return NULL;
 269
 270 }
 271