/* $OpenBSD: x509_skey.c,v 1.2 2021/11/01 20:53:08 tb Exp $ */

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

 * project 1999.

 */

/* ====================================================================

 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include <string.h>

#include <openssl/err.h>

#include <openssl/x509v3.h>

#include "x509_lcl.h"

static ASN1_OCTET_STRING *s2i_skey_id(X509V3_EXT_METHOD *method,

    X509V3_CTX *ctx, char *str);

const X509V3_EXT_METHOD v3_skey_id = {

  .ext_nid = NID_subject_key_identifier,

  .ext_flags = 0,

  .it = &ASN1_OCTET_STRING_it,

  .ext_new = NULL,

  .ext_free = NULL,

  .d2i = NULL,

  .i2d = NULL,

  .i2s = (X509V3_EXT_I2S)i2s_ASN1_OCTET_STRING,

  .s2i = (X509V3_EXT_S2I)s2i_skey_id,

  .i2v = NULL,

  .v2i = NULL,

  .i2r = NULL,

  .r2i = NULL,

  .usr_data = NULL,

};

char *

i2s_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, const ASN1_OCTET_STRING *oct)

{

  return hex_to_string(oct->data, oct->length);

}

ASN1_OCTET_STRING *

s2i_ASN1_OCTET_STRING(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,

    const char *str)

{

  ASN1_OCTET_STRING *oct;

  long length;

  if (!(oct = ASN1_OCTET_STRING_new())) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

  if (!(oct->data = string_to_hex(str, &length))) {

    ASN1_OCTET_STRING_free(oct);

    return NULL;

  }

  oct->length = length;

  return oct;

}

static ASN1_OCTET_STRING *

s2i_skey_id(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, char *str)

{

  ASN1_OCTET_STRING *oct;

  ASN1_BIT_STRING *pk;

  unsigned char pkey_dig[EVP_MAX_MD_SIZE];

  unsigned int diglen;

  if (strcmp(str, "hash"))

    return s2i_ASN1_OCTET_STRING(method, ctx, str);

  if (!(oct = ASN1_OCTET_STRING_new())) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

  if (ctx && (ctx->flags == CTX_TEST))

    return oct;

  if (!ctx || (!ctx->subject_req && !ctx->subject_cert)) {

    X509V3error(X509V3_R_NO_PUBLIC_KEY);

    goto err;

  }

  if (ctx->subject_req)

    pk = ctx->subject_req->req_info->pubkey->public_key;

  else

    pk = ctx->subject_cert->cert_info->key->public_key;

  if (!pk) {

    X509V3error(X509V3_R_NO_PUBLIC_KEY);

    goto err;

  }

  if (!EVP_Digest(pk->data, pk->length, pkey_dig, &diglen,

      EVP_sha1(), NULL))

    goto err;

  if (!ASN1_STRING_set(oct, pkey_dig, diglen)) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    goto err;

  }

  return oct;

err:

  ASN1_OCTET_STRING_free(oct);

  return NULL;

}