lib/libcrypto/x509v3/v3_skey.c

   1 /* $OpenBSD: v3_skey.c,v 1.16 2018/05/19 10:37:02 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 static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,
  66     X509V3_CTX *ctx, char *str);
  67
  68 const X509V3_EXT_METHOD v3_skey_id = {
  69         .ext_nid = NID_subject_key_identifier,
  70         .ext_flags = 0,
  71         .it = &ASN1_OCTET_STRING_it,
  72         .ext_new = NULL,
  73         .ext_free = NULL,
  74         .d2i = NULL,
  75         .i2d = NULL,
  76         .i2s = (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,
  77         .s2i = (X509V3_EXT_S2I)s2i_skey_id,
  78         .i2v = NULL,
  79         .v2i = NULL,
  80         .i2r = NULL,
  81         .r2i = NULL,
  82         .usr_data = NULL,
  83 };
  84
  85 char *
  86 i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, const ASN1_OCTET_STRING *oct)
  87 {
  88         return hex_to_string(oct->data, oct->length);
  89 }
  90
  91 ASN1_OCTET_STRING *
  92 s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
  93     const char *str)
  94 {
  95         ASN1_OCTET_STRING *oct;
  96         long length;
  97
  98         if (!(oct = ASN1_OCTET_STRING_new())) {
  99                 X509V3error(ERR_R_MALLOC_FAILURE);
 100                 return NULL;
 101         }
 102
 103         if (!(oct->data = string_to_hex(str, &length))) {
 104                 ASN1_OCTET_STRING_free(oct);
 105                 return NULL;
 106         }
 107
 108         oct->length = length;
 109
 110         return oct;
 111 }
 112
 113 static ASN1_OCTET_STRING *
 114 s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str)
 115 {
 116         ASN1_OCTET_STRING *oct;
 117         ASN1_BIT_STRING *pk;
 118         unsigned char pkey_dig[EVP_MAX_MD_SIZE];
 119         unsigned int diglen;
 120
 121         if (strcmp(str, "hash"))
 122                 return s2i_ASN1_OCTET_STRING(method, ctx, str);
 123
 124         if (!(oct = ASN1_OCTET_STRING_new())) {
 125                 X509V3error(ERR_R_MALLOC_FAILURE);
 126                 return NULL;
 127         }
 128
 129         if (ctx && (ctx->flags == CTX_TEST))
 130                 return oct;
 131
 132         if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {
 133                 X509V3error(X509V3_R_NO_PUBLIC_KEY);
 134                 goto err;
 135         }
 136
 137         if (ctx->subject_req)
 138                 pk = ctx->subject_req->req_info->pubkey->public_key;
 139         else
 140                 pk = ctx->subject_cert->cert_info->key->public_key;
 141
 142         if (!pk) {
 143                 X509V3error(X509V3_R_NO_PUBLIC_KEY);
 144                 goto err;
 145         }
 146
 147         if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen,
 148             EVP_sha1(), NULL))
 149                 goto err;
 150
 151         if (!ASN1_STRING_set(oct, pkey_dig, diglen)) {
 152                 X509V3error(ERR_R_MALLOC_FAILURE);
 153                 goto err;
 154         }
 155
 156         return oct;
 157
 158 err:
 159         ASN1_OCTET_STRING_free(oct);
 160         return NULL;
 161 }