1 /* v3_akey.c */ 2 /* 3 * Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh (at) cryptsoft.com). */ 57 58 #include <stdio.h> 59 #include <string.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/asn1t.h> 63 #include <openssl/conf.h> 64 #include <openssl/err.h> 65 #include <openssl/mem.h> 66 #include <openssl/obj.h> 67 #include <openssl/x509v3.h> 68 69 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 70 AUTHORITY_KEYID *akeyid, 71 STACK_OF(CONF_VALUE) 72 *extlist); 73 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 74 X509V3_CTX *ctx, 75 STACK_OF(CONF_VALUE) *values); 76 77 const X509V3_EXT_METHOD v3_akey_id = { 78 NID_authority_key_identifier, 79 X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID), 80 0, 0, 0, 0, 81 0, 0, 82 (X509V3_EXT_I2V) i2v_AUTHORITY_KEYID, 83 (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, 84 0, 0, 85 NULL 86 }; 87 88 static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 89 AUTHORITY_KEYID *akeyid, 90 STACK_OF(CONF_VALUE) 91 *extlist) 92 { 93 char *tmp; 94 if (akeyid->keyid) { 95 tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length); 96 X509V3_add_value("keyid", tmp, &extlist); 97 OPENSSL_free(tmp); 98 } 99 if (akeyid->issuer) 100 extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); 101 if (akeyid->serial) { 102 tmp = hex_to_string(akeyid->serial->data, akeyid->serial->length); 103 X509V3_add_value("serial", tmp, &extlist); 104 OPENSSL_free(tmp); 105 } 106 return extlist; 107 } 108 109 /* 110 * Currently two options: keyid: use the issuers subject keyid, the value 111 * 'always' means its is an error if the issuer certificate doesn't have a 112 * key id. issuer: use the issuers cert issuer and serial number. The default 113 * is to only use this if keyid is not present. With the option 'always' this 114 * is always included. 115 */ 116 117 static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, 118 X509V3_CTX *ctx, 119 STACK_OF(CONF_VALUE) *values) 120 { 121 char keyid = 0, issuer = 0; 122 size_t i; 123 int j; 124 CONF_VALUE *cnf; 125 ASN1_OCTET_STRING *ikeyid = NULL; 126 X509_NAME *isname = NULL; 127 GENERAL_NAMES *gens = NULL; 128 GENERAL_NAME *gen = NULL; 129 ASN1_INTEGER *serial = NULL; 130 X509_EXTENSION *ext; 131 X509 *cert; 132 AUTHORITY_KEYID *akeyid; 133 134 for (i = 0; i < sk_CONF_VALUE_num(values); i++) { 135 cnf = sk_CONF_VALUE_value(values, i); 136 if (!strcmp(cnf->name, "keyid")) { 137 keyid = 1; 138 if (cnf->value && !strcmp(cnf->value, "always")) 139 keyid = 2; 140 } else if (!strcmp(cnf->name, "issuer")) { 141 issuer = 1; 142 if (cnf->value && !strcmp(cnf->value, "always")) 143 issuer = 2; 144 } else { 145 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_OPTION); 146 ERR_add_error_data(2, "name=", cnf->name); 147 return NULL; 148 } 149 } 150 151 if (!ctx || !ctx->issuer_cert) { 152 if (ctx && (ctx->flags == CTX_TEST)) 153 return AUTHORITY_KEYID_new(); 154 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_CERTIFICATE); 155 return NULL; 156 } 157 158 cert = ctx->issuer_cert; 159 160 if (keyid) { 161 j = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); 162 if ((j >= 0) && (ext = X509_get_ext(cert, j))) 163 ikeyid = X509V3_EXT_d2i(ext); 164 if (keyid == 2 && !ikeyid) { 165 OPENSSL_PUT_ERROR(X509V3, 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 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); 175 goto err; 176 } 177 } 178 179 if (!(akeyid = AUTHORITY_KEYID_new())) 180 goto err; 181 182 if (isname) { 183 if (!(gens = sk_GENERAL_NAME_new_null()) 184 || !(gen = GENERAL_NAME_new()) 185 || !sk_GENERAL_NAME_push(gens, gen)) { 186 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE); 187 goto err; 188 } 189 gen->type = GEN_DIRNAME; 190 gen->d.dirn = isname; 191 } 192 193 akeyid->issuer = gens; 194 akeyid->serial = serial; 195 akeyid->keyid = ikeyid; 196 197 return akeyid; 198 199 err: 200 X509_NAME_free(isname); 201 M_ASN1_INTEGER_free(serial); 202 M_ASN1_OCTET_STRING_free(ikeyid); 203 return NULL; 204 } 205
