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// Copyright 2014 PDFium Authors. All rights reserved.
// 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_H_
#define CORE_FDRM_FX_CRYPT_H_
#include "core/fxcrt/fx_system.h"
constexpr int32_t kRC4ContextPermutationLength = 256;
struct CRYPT_rc4_context {
int32_t x;
int32_t y;
int32_t m[kRC4ContextPermutationLength];
};
#define MAX_NR 14
#define MAX_NB 8
struct CRYPT_aes_context {
void (*encrypt)(CRYPT_aes_context* ctx, unsigned int* block);
void (*decrypt)(CRYPT_aes_context* ctx, unsigned int* block);
int Nb;
int Nr;
unsigned int keysched[(MAX_NR + 1) * MAX_NB];
unsigned int invkeysched[(MAX_NR + 1) * MAX_NB];
unsigned int iv[MAX_NB];
};
struct CRYPT_md5_context {
uint32_t total[2];
uint32_t state[4];
uint8_t buffer[64];
};
struct CRYPT_sha1_context {
unsigned int h[5];
unsigned char block[64];
int blkused;
unsigned int lenhi;
unsigned int lenlo;
};
struct CRYPT_sha2_context {
uint64_t total[2];
uint64_t state[8];
uint8_t buffer[128];
};
void CRYPT_ArcFourCryptBlock(uint8_t* data,
uint32_t size,
const uint8_t* key,
uint32_t keylen);
void CRYPT_ArcFourSetup(CRYPT_rc4_context* context,
const uint8_t* key,
uint32_t length);
void CRYPT_ArcFourCrypt(CRYPT_rc4_context* context,
uint8_t* data,
uint32_t size);
void CRYPT_AESSetKey(CRYPT_aes_context* context,
const uint8_t* key,
uint32_t keylen,
bool bEncrypt);
void CRYPT_AESSetIV(CRYPT_aes_context* context, const uint8_t* iv);
void CRYPT_AESDecrypt(CRYPT_aes_context* context,
uint8_t* dest,
const uint8_t* src,
uint32_t size);
void CRYPT_AESEncrypt(CRYPT_aes_context* context,
uint8_t* dest,
const uint8_t* src,
uint32_t size);
void CRYPT_MD5Start(CRYPT_md5_context* context);
void CRYPT_MD5Update(CRYPT_md5_context* context,
const uint8_t* data,
uint32_t size);
void CRYPT_MD5Finish(CRYPT_md5_context* context, uint8_t digest[16]);
void CRYPT_MD5Generate(const uint8_t* data, uint32_t size, uint8_t digest[16]);
void CRYPT_SHA1Start(CRYPT_sha1_context* context);
void CRYPT_SHA1Update(CRYPT_sha1_context* context,
const uint8_t* data,
uint32_t size);
void CRYPT_SHA1Finish(CRYPT_sha1_context* context, uint8_t digest[20]);
void CRYPT_SHA1Generate(const uint8_t* data, uint32_t size, uint8_t digest[20]);
void CRYPT_SHA256Start(CRYPT_sha2_context* context);
void CRYPT_SHA256Update(CRYPT_sha2_context* context,
const uint8_t* data,
uint32_t size);
void CRYPT_SHA256Finish(CRYPT_sha2_context* context, uint8_t digest[32]);
void CRYPT_SHA256Generate(const uint8_t* data,
uint32_t size,
uint8_t digest[32]);
void CRYPT_SHA384Start(CRYPT_sha2_context* context);
void CRYPT_SHA384Update(CRYPT_sha2_context* context,
const uint8_t* data,
uint32_t size);
void CRYPT_SHA384Finish(CRYPT_sha2_context* context, uint8_t digest[48]);
void CRYPT_SHA384Generate(const uint8_t* data,
uint32_t size,
uint8_t digest[48]);
void CRYPT_SHA512Start(CRYPT_sha2_context* context);
void CRYPT_SHA512Update(CRYPT_sha2_context* context,
const uint8_t* data,
uint32_t size);
void CRYPT_SHA512Finish(CRYPT_sha2_context* context, uint8_t digest[64]);
void CRYPT_SHA512Generate(const uint8_t* data,
uint32_t size,
uint8_t digest[64]);
#endif // CORE_FDRM_FX_CRYPT_H_
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