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      1 /* v3_skey.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  */
     58 
     59 
     60 #include <stdio.h>
     61 #include "cryptlib.h"
     62 #include <openssl/x509v3.h>
     63 
     64 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str);
     65 const X509V3_EXT_METHOD v3_skey_id = {
     66 NID_subject_key_identifier, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
     67 0,0,0,0,
     68 (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
     69 (X509V3_EXT_S2I)s2i_skey_id,
     70 0,0,0,0,
     71 NULL};
     72 
     73 char *i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
     74 	     ASN1_OCTET_STRING *oct)
     75 {
     76 	return hex_to_string(oct->data, oct->length);
     77 }
     78 
     79 ASN1_OCTET_STRING *s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method,
     80 	     X509V3_CTX *ctx, char *str)
     81 {
     82 	ASN1_OCTET_STRING *oct;
     83 	long length;
     84 
     85 	if(!(oct = M_ASN1_OCTET_STRING_new())) {
     86 		X509V3err(X509V3_F_S2I_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE);
     87 		return NULL;
     88 	}
     89 
     90 	if(!(oct->data = string_to_hex(str, &length))) {
     91 		M_ASN1_OCTET_STRING_free(oct);
     92 		return NULL;
     93 	}
     94 
     95 	oct->length = length;
     96 
     97 	return oct;
     98 
     99 }
    100 
    101 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
    102 	     X509V3_CTX *ctx, char *str)
    103 {
    104 	ASN1_OCTET_STRING *oct;
    105 	ASN1_BIT_STRING *pk;
    106 	unsigned char pkey_dig[EVP_MAX_MD_SIZE];
    107 	unsigned int diglen;
    108 
    109 	if(strcmp(str, "hash")) return s2i_ASN1_OCTET_STRING(method, ctx, str);
    110 
    111 	if(!(oct = M_ASN1_OCTET_STRING_new())) {
    112 		X509V3err(X509V3_F_S2I_SKEY_ID,ERR_R_MALLOC_FAILURE);
    113 		return NULL;
    114 	}
    115 
    116 	if(ctx && (ctx->flags == CTX_TEST)) return oct;
    117 
    118 	if(!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
    119 		X509V3err(X509V3_F_S2I_SKEY_ID,X509V3_R_NO_PUBLIC_KEY);
    120 		goto err;
    121 	}
    122 
    123 	if(ctx->subject_req)
    124 		pk = ctx->subject_req->req_info->pubkey->public_key;
    125 	else pk = ctx->subject_cert->cert_info->key->public_key;
    126 
    127 	if(!pk) {
    128 		X509V3err(X509V3_F_S2I_SKEY_ID,X509V3_R_NO_PUBLIC_KEY);
    129 		goto err;
    130 	}
    131 
    132 	EVP_Digest(pk->data, pk->length, pkey_dig, &diglen, EVP_sha1(), NULL);
    133 
    134 	if(!M_ASN1_OCTET_STRING_set(oct, pkey_dig, diglen)) {
    135 		X509V3err(X509V3_F_S2I_SKEY_ID,ERR_R_MALLOC_FAILURE);
    136 		goto err;
    137 	}
    138 
    139 	return oct;
    140 
    141 	err:
    142 	M_ASN1_OCTET_STRING_free(oct);
    143 	return NULL;
    144 }
    145