/*
 * Copyright 2015 Google Inc. 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
 *
 *     http://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 "cobalt/csp/crypto.h"

#include "base/logging.h"
#include "base/string_piece.h"
#include "crypto/sha2.h"

namespace cobalt {

namespace csp {

bool ComputeDigest(HashAlgorithm algorithm, const char* digestable,
                   size_t length, DigestValue* digest_result) {
  if (algorithm == kHashAlgorithmSha256) {
    digest_result->resize(crypto::kSHA256Length);
    crypto::SHA256HashString(base::StringPiece(digestable, length),
                             &(*digest_result)[0], digest_result->size());
    return true;
  } else {
    DLOG(ERROR) << "Unsupported hash algorithm " << algorithm;
    return false;
  }
}

}  // namespace csp
}  // namespace cobalt