ResourceHasher.h - mozsearch

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/* 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 https://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_ResourceHasher_h

#define mozilla_dom_ResourceHasher_h

#include "nsCOMPtr.h"

#include "nsICryptoHash.h"

#include "nsString.h"

namespace mozilla::dom {

class ResourceHasher final {

 public:

  NS_INLINE_DECL_REFCOUNTING(ResourceHasher)

  // Create a hasher.

  static already_AddRefed<ResourceHasher> Init();

  // Update hash with new data

  nsresult Update(const uint8_t* aData, uint32_t aLength);

  // Finalize and get the hash as base64 string

  nsresult Finish();

  const nsACString& GetHash() const { return mComputedHash; }

 private:

  explicit ResourceHasher(nsICryptoHash* aCrypto);

  ~ResourceHasher() = default;

  nsCOMPtr<nsICryptoHash> mCrypto;

  nsCString mComputedHash;

  bool mFinalized;

};

}  // namespace mozilla::dom

#endif  // mozilla_dom_ResourceHasher_h