1 /* $OpenBSD: x509_skey.c,v 1.6 2024/07/13 15:08:58 tb Exp $ */ 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 <string.h> 61 62 #include <openssl/err.h> 63 #include <openssl/x509v3.h> 64 65 #include "x509_local.h" 66 67 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method, 68 X509V3_CTX *ctx, char *str); 69 70 static const X509V3_EXT_METHOD x509v3_ext_subject_key_identifier = { 71 .ext_nid = NID_subject_key_identifier, 72 .ext_flags = 0, 73 .it = &ASN1_OCTET_STRING_it, 74 .ext_new = NULL, 75 .ext_free = NULL, 76 .d2i = NULL, 77 .i2d = NULL, 78 .i2s = (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING, 79 .s2i = (X509V3_EXT_S2I)s2i_skey_id, 80 .i2v = NULL, 81 .v2i = NULL, 82 .i2r = NULL, 83 .r2i = NULL, 84 .usr_data = NULL, 85 }; 86 87 const X509V3_EXT_METHOD * 88 x509v3_ext_method_subject_key_identifier(void) 89 { 90 return &x509v3_ext_subject_key_identifier; 91 } 92 93 char * 94 i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, const ASN1_OCTET_STRING *oct) 95 { 96 return hex_to_string(oct->data, oct->length); 97 } 98 LCRYPTO_ALIAS(i2s_ASN1_OCTET_STRING); 99 100 ASN1_OCTET_STRING * 101 s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, 102 const char *str) 103 { 104 ASN1_OCTET_STRING *oct; 105 long length; 106 107 if (!(oct = ASN1_OCTET_STRING_new())) { 108 X509V3error(ERR_R_MALLOC_FAILURE); 109 return NULL; 110 } 111 112 if (!(oct->data = string_to_hex(str, &length))) { 113 ASN1_OCTET_STRING_free(oct); 114 return NULL; 115 } 116 117 oct->length = length; 118 119 return oct; 120 } 121 LCRYPTO_ALIAS(s2i_ASN1_OCTET_STRING); 122 123 static ASN1_OCTET_STRING * 124 s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str) 125 { 126 ASN1_OCTET_STRING *oct; 127 ASN1_BIT_STRING *pk; 128 unsigned char pkey_dig[EVP_MAX_MD_SIZE]; 129 unsigned int diglen; 130 131 if (strcmp(str, "hash")) 132 return s2i_ASN1_OCTET_STRING(method, ctx, str); 133 134 if (!(oct = ASN1_OCTET_STRING_new())) { 135 X509V3error(ERR_R_MALLOC_FAILURE); 136 return NULL; 137 } 138 139 if (ctx && (ctx->flags == CTX_TEST)) 140 return oct; 141 142 if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) { 143 X509V3error(X509V3_R_NO_PUBLIC_KEY); 144 goto err; 145 } 146 147 if (ctx->subject_req) 148 pk = ctx->subject_req->req_info->pubkey->public_key; 149 else 150 pk = ctx->subject_cert->cert_info->key->public_key; 151 152 if (!pk) { 153 X509V3error(X509V3_R_NO_PUBLIC_KEY); 154 goto err; 155 } 156 157 if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, 158 EVP_sha1(), NULL)) 159 goto err; 160 161 if (!ASN1_STRING_set(oct, pkey_dig, diglen)) { 162 X509V3error(ERR_R_MALLOC_FAILURE); 163 goto err; 164 } 165 166 return oct; 167 168 err: 169 ASN1_OCTET_STRING_free(oct); 170 return NULL; 171 } 172