1 /* v3_akey.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). */ 56 57 #include <stdio.h> 58 #include <string.h> 59 60 #include <openssl/asn1.h> 61 #include <openssl/asn1t.h> 62 #include <openssl/conf.h> 63 #include <openssl/err.h> 64 #include <openssl/mem.h> 65 #include <openssl/obj.h> 66 #include <openssl/x509v3.h> 67 68 69 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 70 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist); 71 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 72 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values); 73 74 const X509V3_EXT_METHOD v3_akey_id = 75 { 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 86 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 87 AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist) 88 { 89 char *tmp; 90 if(akeyid->keyid) { 91 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length); 92 X509V3_add_value("keyid", tmp, &extlist); 93 OPENSSL_free(tmp); 94 } 95 if(akeyid->issuer) 96 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); 97 if(akeyid->serial) { 98 tmp = hex_to_string(akeyid->serial->data, 99 akeyid->serial->length); 100 X509V3_add_value("serial", tmp, &extlist); 101 OPENSSL_free(tmp); 102 } 103 return extlist; 104 } 105 106 /* Currently two options: 107 * keyid: use the issuers subject keyid, the value 'always' means its is 108 * an error if the issuer certificate doesn't have a key id. 109 * issuer: use the issuers cert issuer and serial number. The default is 110 * to only use this if keyid is not present. With the option 'always' 111 * this is always included. 112 */ 113 114 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 115 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values) 116 { 117 char keyid=0, issuer=0; 118 size_t i; 119 int j; 120 CONF_VALUE *cnf; 121 ASN1_OCTET_STRING *ikeyid = NULL; 122 X509_NAME *isname = NULL; 123 GENERAL_NAMES * gens = NULL; 124 GENERAL_NAME *gen = NULL; 125 ASN1_INTEGER *serial = NULL; 126 X509_EXTENSION *ext; 127 X509 *cert; 128 AUTHORITY_KEYID *akeyid; 129 130 for(i = 0; i < sk_CONF_VALUE_num(values); i++) 131 { 132 cnf = sk_CONF_VALUE_value(values, i); 133 if(!strcmp(cnf->name, "keyid")) 134 { 135 keyid = 1; 136 if(cnf->value && !strcmp(cnf->value, "always")) 137 keyid = 2; 138 } 139 else if(!strcmp(cnf->name, "issuer")) 140 { 141 issuer = 1; 142 if(cnf->value && !strcmp(cnf->value, "always")) 143 issuer = 2; 144 } 145 else 146 { 147 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_OPTION); 148 ERR_add_error_data(2, "name=", cnf->name); 149 return NULL; 150 } 151 } 152 153 if(!ctx || !ctx->issuer_cert) 154 { 155 if(ctx && (ctx->flags==CTX_TEST)) 156 return AUTHORITY_KEYID_new(); 157 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_CERTIFICATE); 158 return NULL; 159 } 160 161 cert = ctx->issuer_cert; 162 163 if(keyid) 164 { 165 j = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); 166 if((j >= 0) && (ext = X509_get_ext(cert, j))) 167 ikeyid = X509V3_EXT_d2i(ext); 168 if(keyid==2 && !ikeyid) 169 { 170 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); 171 return NULL; 172 } 173 } 174 175 if((issuer && !ikeyid) || (issuer == 2)) 176 { 177 isname = X509_NAME_dup(X509_get_issuer_name(cert)); 178 serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert)); 179 if(!isname || !serial) 180 { 181 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); 182 goto err; 183 } 184 } 185 186 if(!(akeyid = AUTHORITY_KEYID_new())) goto err; 187 188 if(isname) 189 { 190 if(!(gens = sk_GENERAL_NAME_new_null()) 191 || !(gen = GENERAL_NAME_new()) 192 || !sk_GENERAL_NAME_push(gens, gen)) 193 { 194 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE); 195 goto err; 196 } 197 gen->type = GEN_DIRNAME; 198 gen->d.dirn = isname; 199 } 200 201 akeyid->issuer = gens; 202 akeyid->serial = serial; 203 akeyid->keyid = ikeyid; 204 205 return akeyid; 206 207 err: 208 X509_NAME_free(isname); 209 M_ASN1_INTEGER_free(serial); 210 M_ASN1_OCTET_STRING_free(ikeyid); 211 return NULL; 212 } 213
