#ifndef SRC_CRYPTO_CRYPTO_KMAC_H_

#define SRC_CRYPTO_CRYPTO_KMAC_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include <string>

#include "crypto/crypto_keys.h"

#include "crypto/crypto_sig.h"

#include "crypto/crypto_util.h"

namespace node::crypto {

// KMAC (Keccak Message Authentication Code) is available since OpenSSL 3.0.

#if OPENSSL_VERSION_MAJOR >= 3

enum class KmacVariant { KMAC128, KMAC256 };

struct KmacConfig final : public MemoryRetainer {

CryptoJobMode job_mode;

SignConfiguration::Mode mode;

KeyObjectData key;

ByteSource data;

ByteSource signature;

ByteSource customization;

KmacVariant variant;

uint32_t length; // Output length in bytes

KmacConfig() = default;

explicit KmacConfig(KmacConfig&& other) noexcept;

KmacConfig& operator=(KmacConfig&& other) noexcept;

void MemoryInfo(MemoryTracker* tracker) const override;

SET_MEMORY_INFO_NAME(KmacConfig)

SET_SELF_SIZE(KmacConfig)

};

struct KmacTraits final {

using AdditionalParameters = KmacConfig;

static constexpr const char* JobName = "KmacJob";

static constexpr AsyncWrap::ProviderType Provider =

AsyncWrap::PROVIDER_SIGNREQUEST;

static v8::Maybe<void> AdditionalConfig(

CryptoJobMode mode,

const v8::FunctionCallbackInfo<v8::Value>& args,

unsigned int offset,

KmacConfig* params);

static bool DeriveBits(Environment* env,

const KmacConfig& params,

ByteSource* out,

CryptoJobMode mode);

static v8::MaybeLocal<v8::Value> EncodeOutput(Environment* env,

const KmacConfig& params,

ByteSource* out);

};

using KmacJob = DeriveBitsJob<KmacTraits>;

namespace Kmac {

void Initialize(Environment* env, v8::Local<v8::Object> target);

void RegisterExternalReferences(ExternalReferenceRegistry* registry);

} // namespace Kmac

#else

// If there is no KMAC support, provide empty namespace functions.

namespace Kmac {

void Initialize(Environment* env, v8::Local<v8::Object> target) {}

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {}

} // namespace Kmac

#endif

} // namespace node::crypto

#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif // SRC_CRYPTO_CRYPTO_KMAC_H_