core/fdrm/fx_crypt_sha.h

// Copyright 2024 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#ifndef CORE_FDRM_FX_CRYPT_SHA_H_
#define CORE_FDRM_FX_CRYPT_SHA_H_

#include <stdint.h>

#include <array>

#include "core/fxcrt/data_vector.h"
#include "core/fxcrt/span.h"

struct CRYPT_sha1_context {
  uint64_t total_bytes;
  uint32_t blkused;  // Constrained to [0, 64).
  std::array<uint32_t, 5> h;
  std::array<uint8_t, 64> block;
};

struct CRYPT_sha2_context {
  uint64_t total_bytes;
  std::array<uint64_t, 8> state;
  uint8_t buffer[128];
};

void CRYPT_SHA1Start(CRYPT_sha1_context* context);
void CRYPT_SHA1Update(CRYPT_sha1_context* context,
                      pdfium::span<const uint8_t> data);
void CRYPT_SHA1Finish(CRYPT_sha1_context* context,
                      pdfium::span<uint8_t, 20> digest);
DataVector<uint8_t> CRYPT_SHA1Generate(pdfium::span<const uint8_t> data);

void CRYPT_SHA256Start(CRYPT_sha2_context* context);
void CRYPT_SHA256Update(CRYPT_sha2_context* context,
                        pdfium::span<const uint8_t> data);
void CRYPT_SHA256Finish(CRYPT_sha2_context* context,
                        pdfium::span<uint8_t, 32> digest);
DataVector<uint8_t> CRYPT_SHA256Generate(pdfium::span<const uint8_t> data);

void CRYPT_SHA384Start(CRYPT_sha2_context* context);
void CRYPT_SHA384Update(CRYPT_sha2_context* context,
                        pdfium::span<const uint8_t> data);
void CRYPT_SHA384Finish(CRYPT_sha2_context* context,
                        pdfium::span<uint8_t, 48> digest);
DataVector<uint8_t> CRYPT_SHA384Generate(pdfium::span<const uint8_t> data);

void CRYPT_SHA512Start(CRYPT_sha2_context* context);
void CRYPT_SHA512Update(CRYPT_sha2_context* context,
                        pdfium::span<const uint8_t> data);
void CRYPT_SHA512Finish(CRYPT_sha2_context* context,
                        pdfium::span<uint8_t, 64> digest);
DataVector<uint8_t> CRYPT_SHA512Generate(pdfium::span<const uint8_t> data);

#endif  // CORE_FDRM_FX_CRYPT_SHA_H_