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// Copyright 2016 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_FPDFAPI_PARSER_CPDF_CRYPTO_HANDLER_H_
#define CORE_FPDFAPI_PARSER_CPDF_CRYPTO_HANDLER_H_
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
class CPDF_Dictionary;
class CPDF_SecurityHandler;
class CPDF_CryptoHandler {
public:
CPDF_CryptoHandler();
~CPDF_CryptoHandler();
bool Init(CPDF_Dictionary* pEncryptDict,
CPDF_SecurityHandler* pSecurityHandler);
uint32_t DecryptGetSize(uint32_t src_size);
void* DecryptStart(uint32_t objnum, uint32_t gennum);
void Decrypt(uint32_t objnum, uint32_t gennum, CFX_ByteString& str);
bool DecryptStream(void* context,
const uint8_t* src_buf,
uint32_t src_size,
CFX_BinaryBuf& dest_buf);
bool DecryptFinish(void* context, CFX_BinaryBuf& dest_buf);
uint32_t EncryptGetSize(uint32_t objnum,
uint32_t version,
const uint8_t* src_buf,
uint32_t src_size);
bool EncryptContent(uint32_t objnum,
uint32_t version,
const uint8_t* src_buf,
uint32_t src_size,
uint8_t* dest_buf,
uint32_t& dest_size);
bool Init(int cipher, const uint8_t* key, int keylen);
protected:
void CryptBlock(bool bEncrypt,
uint32_t objnum,
uint32_t gennum,
const uint8_t* src_buf,
uint32_t src_size,
uint8_t* dest_buf,
uint32_t& dest_size);
void* CryptStart(uint32_t objnum, uint32_t gennum, bool bEncrypt);
bool CryptStream(void* context,
const uint8_t* src_buf,
uint32_t src_size,
CFX_BinaryBuf& dest_buf,
bool bEncrypt);
bool CryptFinish(void* context, CFX_BinaryBuf& dest_buf, bool bEncrypt);
uint8_t m_EncryptKey[32];
int m_KeyLen;
int m_Cipher;
uint8_t* m_pAESContext;
private:
void PopulateKey(uint32_t objnum, uint32_t gennum, uint8_t* key);
};
#endif // CORE_FPDFAPI_PARSER_CPDF_CRYPTO_HANDLER_H_
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