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// Copyright 2014 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_AES_H_
#define COMPONENTS_WEBCRYPTO_ALGORITHMS_AES_H_
#include <stdint.h>
#include <string_view>
#include "components/webcrypto/algorithm_implementation.h"
namespace webcrypto {
// Base class for AES algorithms that provides the implementation for key
// creation and export.
class AesAlgorithm : public AlgorithmImplementation {
public:
// |all_key_usages| is the set of all WebCrypto key usages that are
// allowed for imported or generated keys. |jwk_suffix| is the suffix
// used when constructing JWK names for the algorithm. For instance A128CBC
// is the JWK name for 128-bit AES-CBC. The |jwk_suffix| in this case would
// be "CBC".
AesAlgorithm(blink::WebCryptoKeyUsageMask all_key_usages,
std::string_view jwk_suffix);
// This is the same as the other AesAlgorithm constructor where
// |all_key_usages| is pre-filled to values for encryption/decryption
// algorithms (supports usages for: encrypt, decrypt, wrap, unwrap).
explicit AesAlgorithm(std::string_view jwk_suffix);
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 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;
Status GetKeyLength(const blink::WebCryptoAlgorithm& key_length_algorithm,
std::optional<unsigned int>* length_bits) 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 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 ExportKeyJwk(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const;
const blink::WebCryptoKeyUsageMask all_key_usages_;
const std::string jwk_suffix_;
};
} // namespace webcrypto
#endif // COMPONENTS_WEBCRYPTO_ALGORITHMS_AES_H_
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