1/* v3_akey.c */ 2/* Written by Dr Stephen N Henson (steve@openssl.org) 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 66static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 67 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist); 68static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 69 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values); 70 71const X509V3_EXT_METHOD v3_akey_id = 72 { 73 NID_authority_key_identifier, 74 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID), 75 0,0,0,0, 76 0,0, 77 (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID, 78 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, 79 0,0, 80 NULL 81 }; 82 83static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 84 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist) 85{ 86 char *tmp; 87 if(akeyid->keyid) { 88 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length); 89 X509V3_add_value("keyid", tmp, &extlist); 90 OPENSSL_free(tmp); 91 } 92 if(akeyid->issuer) 93 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); 94 if(akeyid->serial) { 95 tmp = hex_to_string(akeyid->serial->data, 96 akeyid->serial->length); 97 X509V3_add_value("serial", tmp, &extlist); 98 OPENSSL_free(tmp); 99 } 100 return extlist; 101} 102 103/* Currently two options: 104 * keyid: use the issuers subject keyid, the value 'always' means its is 105 * an error if the issuer certificate doesn't have a key id. 106 * issuer: use the issuers cert issuer and serial number. The default is 107 * to only use this if keyid is not present. With the option 'always' 108 * this is always included. 109 */ 110 111static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 112 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values) 113 { 114 char keyid=0, issuer=0; 115 int i; 116 CONF_VALUE *cnf; 117 ASN1_OCTET_STRING *ikeyid = NULL; 118 X509_NAME *isname = NULL; 119 GENERAL_NAMES * gens = NULL; 120 GENERAL_NAME *gen = NULL; 121 ASN1_INTEGER *serial = NULL; 122 X509_EXTENSION *ext; 123 X509 *cert; 124 AUTHORITY_KEYID *akeyid; 125 126 for(i = 0; i < sk_CONF_VALUE_num(values); i++) 127 { 128 cnf = sk_CONF_VALUE_value(values, i); 129 if(!strcmp(cnf->name, "keyid")) 130 { 131 keyid = 1; 132 if(cnf->value && !strcmp(cnf->value, "always")) 133 keyid = 2; 134 } 135 else if(!strcmp(cnf->name, "issuer")) 136 { 137 issuer = 1; 138 if(cnf->value && !strcmp(cnf->value, "always")) 139 issuer = 2; 140 } 141 else 142 { 143 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION); 144 ERR_add_error_data(2, "name=", cnf->name); 145 return NULL; 146 } 147 } 148 149 if(!ctx || !ctx->issuer_cert) 150 { 151 if(ctx && (ctx->flags==CTX_TEST)) 152 return AUTHORITY_KEYID_new(); 153 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE); 154 return NULL; 155 } 156 157 cert = ctx->issuer_cert; 158 159 if(keyid) 160 { 161 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); 162 if((i >= 0) && (ext = X509_get_ext(cert, i))) 163 ikeyid = X509V3_EXT_d2i(ext); 164 if(keyid==2 && !ikeyid) 165 { 166 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); 167 return NULL; 168 } 169 } 170 171 if((issuer && !ikeyid) || (issuer == 2)) 172 { 173 isname = X509_NAME_dup(X509_get_issuer_name(cert)); 174 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert)); 175 if(!isname || !serial) 176 { 177 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); 178 goto err; 179 } 180 } 181 182 if(!(akeyid = AUTHORITY_KEYID_new())) goto err; 183 184 if(isname) 185 { 186 if(!(gens = sk_GENERAL_NAME_new_null()) 187 || !(gen = GENERAL_NAME_new()) 188 || !sk_GENERAL_NAME_push(gens, gen)) 189 { 190 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE); 191 goto err; 192 } 193 gen->type = GEN_DIRNAME; 194 gen->d.dirn = isname; 195 } 196 197 akeyid->issuer = gens; 198 akeyid->serial = serial; 199 akeyid->keyid = ikeyid; 200 201 return akeyid; 202 203 err: 204 X509_NAME_free(isname); 205 M_ASN1_INTEGER_free(serial); 206 M_ASN1_OCTET_STRING_free(ikeyid); 207 return NULL; 208 } 209