// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_
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#define CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_
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#include "core/fxcrt/include/fx_basic.h"
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#include "core/fxcrt/include/fx_string.h"
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#include "core/fxcrt/include/fx_system.h"
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class CPDF_Dictionary;
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class CPDF_SecurityHandler;
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class CPDF_CryptoHandler {
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public:
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CPDF_CryptoHandler();
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~CPDF_CryptoHandler();
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FX_BOOL Init(CPDF_Dictionary* pEncryptDict,
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CPDF_SecurityHandler* pSecurityHandler);
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uint32_t DecryptGetSize(uint32_t src_size);
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void* DecryptStart(uint32_t objnum, uint32_t gennum);
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void Decrypt(uint32_t objnum, uint32_t gennum, CFX_ByteString& str);
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FX_BOOL DecryptStream(void* context,
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const uint8_t* src_buf,
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uint32_t src_size,
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CFX_BinaryBuf& dest_buf);
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FX_BOOL DecryptFinish(void* context, CFX_BinaryBuf& dest_buf);
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uint32_t EncryptGetSize(uint32_t objnum,
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uint32_t version,
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const uint8_t* src_buf,
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uint32_t src_size);
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FX_BOOL EncryptContent(uint32_t objnum,
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uint32_t version,
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const uint8_t* src_buf,
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uint32_t src_size,
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uint8_t* dest_buf,
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uint32_t& dest_size);
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FX_BOOL Init(int cipher, const uint8_t* key, int keylen);
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protected:
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void CryptBlock(FX_BOOL bEncrypt,
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uint32_t objnum,
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uint32_t gennum,
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const uint8_t* src_buf,
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uint32_t src_size,
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uint8_t* dest_buf,
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uint32_t& dest_size);
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void* CryptStart(uint32_t objnum, uint32_t gennum, FX_BOOL bEncrypt);
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FX_BOOL CryptStream(void* context,
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const uint8_t* src_buf,
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uint32_t src_size,
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CFX_BinaryBuf& dest_buf,
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FX_BOOL bEncrypt);
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FX_BOOL CryptFinish(void* context, CFX_BinaryBuf& dest_buf, FX_BOOL bEncrypt);
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uint8_t m_EncryptKey[32];
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int m_KeyLen;
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int m_Cipher;
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uint8_t* m_pAESContext;
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};
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#endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_
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