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Editing: crypto_hash.h

#ifndef SRC_CRYPTO_CRYPTO_HASH_H_
#define SRC_CRYPTO_CRYPTO_HASH_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "base_object.h"
#include "crypto/crypto_keys.h"
#include "crypto/crypto_util.h"
#include "env.h"
#include "memory_tracker.h"
#include "v8.h"

namespace node {
namespace crypto {
class Hash final : public BaseObject {
 public:
  static void Initialize(Environment* env, v8::Local<v8::Object> target);
  static void RegisterExternalReferences(ExternalReferenceRegistry* registry);

void MemoryInfo(MemoryTracker* tracker) const override;
  SET_MEMORY_INFO_NAME(Hash)
  SET_SELF_SIZE(Hash)

bool HashInit(const EVP_MD* md, v8::Maybe<unsigned int> xof_md_len);
  bool HashUpdate(const char* data, size_t len);

static void GetHashes(const v8::FunctionCallbackInfo<v8::Value>& args);

protected:
  static void New(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void HashUpdate(const v8::FunctionCallbackInfo<v8::Value>& args);
  static void HashDigest(const v8::FunctionCallbackInfo<v8::Value>& args);

Hash(Environment* env, v8::Local<v8::Object> wrap);

private:
  EVPMDPointer mdctx_ {};
  unsigned int md_len_ = 0;
  ByteSource digest_;
};

struct HashConfig final : public MemoryRetainer {
  CryptoJobMode mode;
  ByteSource in;
  const EVP_MD* digest;
  unsigned int length;

HashConfig() = default;

explicit HashConfig(HashConfig&& other) noexcept;

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

void MemoryInfo(MemoryTracker* tracker) const override;
  SET_MEMORY_INFO_NAME(HashConfig)
  SET_SELF_SIZE(HashConfig)
};

struct HashTraits final {
  using AdditionalParameters = HashConfig;
  static constexpr const char* JobName = "HashJob";
  static constexpr AsyncWrap::ProviderType Provider =
      AsyncWrap::PROVIDER_HASHREQUEST;

static v8::Maybe<bool> AdditionalConfig(
      CryptoJobMode mode,
      const v8::FunctionCallbackInfo<v8::Value>& args,
      unsigned int offset,
      HashConfig* params);

static bool DeriveBits(Environment* env,
                         const HashConfig& params,
                         ByteSource* out,
                         CryptoJobMode mode);

static v8::Maybe<bool> EncodeOutput(
      Environment* env,
      const HashConfig& params,
      ByteSource* out,
      v8::Local<v8::Value>* result);
};

using HashJob = DeriveBitsJob<HashTraits>;

void InternalVerifyIntegrity(const v8::FunctionCallbackInfo<v8::Value>& args);

}  // namespace crypto
}  // namespace node

#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif  // SRC_CRYPTO_CRYPTO_HASH_H_

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