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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_WEBCRYPTO_ALGORITHMS_X25519_H_
#define COMPONENTS_WEBCRYPTO_ALGORITHMS_X25519_H_
#include "components/webcrypto/algorithm_implementation.h"
namespace webcrypto {
// This class implements X25519, a key agreement algorithm using the X25519
// function specified in RFC 8410. https://www.rfc-editor.org/rfc/rfc8410
class X25519Implementation : public AlgorithmImplementation {
public:
Status GenerateKey(const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
GenerateKeyResult* result) const override;
Status ImportKey(blink::WebCryptoKeyFormat format,
base::span<const uint8_t> key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const override;
Status ExportKey(blink::WebCryptoKeyFormat format,
const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const override;
Status DeriveBits(const blink::WebCryptoAlgorithm& algorithm,
const blink::WebCryptoKey& base_key,
absl::optional<unsigned int> length_bits,
std::vector<uint8_t>* derived_bytes) const override;
Status DeserializeKeyForClone(const blink::WebCryptoKeyAlgorithm& algorithm,
blink::WebCryptoKeyType type,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
base::span<const uint8_t> key_data,
blink::WebCryptoKey* key) const override;
private:
Status ImportKeyRaw(base::span<const uint8_t> key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const;
Status ImportKeyPkcs8(base::span<const uint8_t> key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const;
Status ImportKeySpki(base::span<const uint8_t> key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const;
Status ImportKeyJwk(base::span<const uint8_t> key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const;
Status ExportKeyRaw(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const;
Status ExportKeyPkcs8(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const;
Status ExportKeySpki(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const;
Status ExportKeyJwk(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const;
const blink::WebCryptoKeyUsageMask all_public_key_usages_{};
const blink::WebCryptoKeyUsageMask all_private_key_usages_{
blink::kWebCryptoKeyUsageDeriveKey | blink::kWebCryptoKeyUsageDeriveBits};
};
} // namespace webcrypto
#endif // COMPONENTS_WEBCRYPTO_ALGORITHMS_X25519_H_
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