1/* v3_akey.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4 * 1999. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60#include <stdio.h> 61#include "cryptlib.h" 62#include <openssl/conf.h> 63#include <openssl/asn1.h> 64#include <openssl/asn1t.h> 65#include <openssl/x509v3.h> 66 67static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 68 AUTHORITY_KEYID *akeyid, 69 STACK_OF(CONF_VALUE) 70 *extlist); 71static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 72 X509V3_CTX *ctx, 73 STACK_OF(CONF_VALUE) *values); 74 75const X509V3_EXT_METHOD v3_akey_id = { 76 NID_authority_key_identifier, 77 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID), 78 0, 0, 0, 0, 79 0, 0, 80 (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID, 81 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, 82 0, 0, 83 NULL 84}; 85 86static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 87 AUTHORITY_KEYID *akeyid, 88 STACK_OF(CONF_VALUE) 89 *extlist) 90{ 91 char *tmp; 92 if (akeyid->keyid) { 93 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length); 94 X509V3_add_value("keyid", tmp, &extlist); 95 OPENSSL_free(tmp); 96 } 97 if (akeyid->issuer) 98 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); 99 if (akeyid->serial) { 100 tmp = hex_to_string(akeyid->serial->data, akeyid->serial->length); 101 X509V3_add_value("serial", tmp, &extlist); 102 OPENSSL_free(tmp); 103 } 104 return extlist; 105} 106 107/*- 108 * Currently two options: 109 * keyid: use the issuers subject keyid, the value 'always' means its is 110 * an error if the issuer certificate doesn't have a key id. 111 * issuer: use the issuers cert issuer and serial number. The default is 112 * to only use this if keyid is not present. With the option 'always' 113 * this is always included. 114 */ 115 116static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 117 X509V3_CTX *ctx, 118 STACK_OF(CONF_VALUE) *values) 119{ 120 char keyid = 0, issuer = 0; 121 int i; 122 CONF_VALUE *cnf; 123 ASN1_OCTET_STRING *ikeyid = NULL; 124 X509_NAME *isname = NULL; 125 GENERAL_NAMES *gens = NULL; 126 GENERAL_NAME *gen = NULL; 127 ASN1_INTEGER *serial = NULL; 128 X509_EXTENSION *ext; 129 X509 *cert; 130 AUTHORITY_KEYID *akeyid; 131 132 for (i = 0; i < sk_CONF_VALUE_num(values); i++) { 133 cnf = sk_CONF_VALUE_value(values, i); 134 if (!strcmp(cnf->name, "keyid")) { 135 keyid = 1; 136 if (cnf->value && !strcmp(cnf->value, "always")) 137 keyid = 2; 138 } else if (!strcmp(cnf->name, "issuer")) { 139 issuer = 1; 140 if (cnf->value && !strcmp(cnf->value, "always")) 141 issuer = 2; 142 } else { 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 if (ctx && (ctx->flags == CTX_TEST)) 151 return AUTHORITY_KEYID_new(); 152 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, 153 X509V3_R_NO_ISSUER_CERTIFICATE); 154 return NULL; 155 } 156 157 cert = ctx->issuer_cert; 158 159 if (keyid) { 160 i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); 161 if ((i >= 0) && (ext = X509_get_ext(cert, i))) 162 ikeyid = X509V3_EXT_d2i(ext); 163 if (keyid == 2 && !ikeyid) { 164 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, 165 X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); 166 return NULL; 167 } 168 } 169 170 if ((issuer && !ikeyid) || (issuer == 2)) { 171 isname = X509_NAME_dup(X509_get_issuer_name(cert)); 172 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert)); 173 if (!isname || !serial) { 174 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, 175 X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); 176 goto err; 177 } 178 } 179 180 if (!(akeyid = AUTHORITY_KEYID_new())) 181 goto err; 182 183 if (isname) { 184 if (!(gens = sk_GENERAL_NAME_new_null()) 185 || !(gen = GENERAL_NAME_new()) 186 || !sk_GENERAL_NAME_push(gens, gen)) { 187 X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE); 188 goto err; 189 } 190 gen->type = GEN_DIRNAME; 191 gen->d.dirn = isname; 192 } 193 194 akeyid->issuer = gens; 195 akeyid->serial = serial; 196 akeyid->keyid = ikeyid; 197 198 return akeyid; 199 200 err: 201 X509_NAME_free(isname); 202 M_ASN1_INTEGER_free(serial); 203 M_ASN1_OCTET_STRING_free(ikeyid); 204 return NULL; 205} 206