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1 // Copyright 2016 PDFium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
6 | |
7 #ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_ | |
8 #define CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_ | |
9 | |
10 #include "core/fxcrt/fx_basic.h" | |
11 #include "core/fxcrt/fx_string.h" | |
12 #include "core/fxcrt/fx_system.h" | |
13 | |
14 class CPDF_Dictionary; | |
15 class CPDF_SecurityHandler; | |
16 | |
17 class CPDF_CryptoHandler { | |
18 public: | |
19 CPDF_CryptoHandler(); | |
20 ~CPDF_CryptoHandler(); | |
21 | |
22 FX_BOOL Init(CPDF_Dictionary* pEncryptDict, | |
23 CPDF_SecurityHandler* pSecurityHandler); | |
24 uint32_t DecryptGetSize(uint32_t src_size); | |
25 void* DecryptStart(uint32_t objnum, uint32_t gennum); | |
26 void Decrypt(uint32_t objnum, uint32_t gennum, CFX_ByteString& str); | |
27 FX_BOOL DecryptStream(void* context, | |
28 const uint8_t* src_buf, | |
29 uint32_t src_size, | |
30 CFX_BinaryBuf& dest_buf); | |
31 FX_BOOL DecryptFinish(void* context, CFX_BinaryBuf& dest_buf); | |
32 uint32_t EncryptGetSize(uint32_t objnum, | |
33 uint32_t version, | |
34 const uint8_t* src_buf, | |
35 uint32_t src_size); | |
36 FX_BOOL EncryptContent(uint32_t objnum, | |
37 uint32_t version, | |
38 const uint8_t* src_buf, | |
39 uint32_t src_size, | |
40 uint8_t* dest_buf, | |
41 uint32_t& dest_size); | |
42 | |
43 FX_BOOL Init(int cipher, const uint8_t* key, int keylen); | |
44 | |
45 protected: | |
46 void CryptBlock(FX_BOOL bEncrypt, | |
47 uint32_t objnum, | |
48 uint32_t gennum, | |
49 const uint8_t* src_buf, | |
50 uint32_t src_size, | |
51 uint8_t* dest_buf, | |
52 uint32_t& dest_size); | |
53 void* CryptStart(uint32_t objnum, uint32_t gennum, FX_BOOL bEncrypt); | |
54 FX_BOOL CryptStream(void* context, | |
55 const uint8_t* src_buf, | |
56 uint32_t src_size, | |
57 CFX_BinaryBuf& dest_buf, | |
58 FX_BOOL bEncrypt); | |
59 FX_BOOL CryptFinish(void* context, CFX_BinaryBuf& dest_buf, FX_BOOL bEncrypt); | |
60 | |
61 uint8_t m_EncryptKey[32]; | |
62 int m_KeyLen; | |
63 int m_Cipher; | |
64 uint8_t* m_pAESContext; | |
65 | |
66 private: | |
67 void PopulateKey(uint32_t objnum, uint32_t gennum, uint8_t* key); | |
68 }; | |
69 | |
70 #endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_CRYPTO_HANDLER_H_ | |
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