// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <openssl/x509.h>

#include <openssl/asn1.h>

#include <openssl/digest.h>

#include <openssl/err.h>

#include <openssl/mem.h>

int ASN1_digest(i2d_of_void *i2d, const EVP_MD *type, char *data,

                unsigned char *md, unsigned int *len) {

  int i, ret;

  unsigned char *str, *p;

  i = i2d(data, NULL);

  if ((str = (unsigned char *)OPENSSL_malloc(i)) == NULL) {

    return 0;

  }

  p = str;

  i2d(data, &p);

  ret = EVP_Digest(str, i, md, len, type, NULL);

  OPENSSL_free(str);

  return ret;

}

int ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *type, void *asn,

                     unsigned char *md, unsigned int *len) {

  int i, ret;

  unsigned char *str = NULL;

  i = ASN1_item_i2d(reinterpret_cast<ASN1_VALUE *>(asn), &str, it);

  if (!str) {

    return 0;

  }

  ret = EVP_Digest(str, i, md, len, type, NULL);

  OPENSSL_free(str);

  return ret;

}