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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_U2FUtil_h
#define mozilla_dom_U2FUtil_h

namespace mozilla {
namespace dom {

static nsresult HashCString(nsICryptoHash* aHashService, const nsACString& aIn,
                            /* out */ CryptoBuffer& aOut) {
  MOZ_ASSERT(aHashService);

  nsresult rv = aHashService->Init(nsICryptoHash::SHA256);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  rv = aHashService->Update(
      reinterpret_cast<const uint8_t*>(aIn.BeginReading()), aIn.Length());
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  nsAutoCString fullHash;
  // Passing false below means we will get a binary result rather than a
  // base64-encoded string.
  rv = aHashService->Finish(false, fullHash);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return rv;
  }

  aOut.Assign(fullHash);
  return rv;
}

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_U2FUtil_h