1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// 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_SECURITY_HANDLER_H_
#define CORE_FPDFAPI_PARSER_CPDF_SECURITY_HANDLER_H_
#include <memory>
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
#define FXCIPHER_NONE 0
#define FXCIPHER_RC4 1
#define FXCIPHER_AES 2
#define FXCIPHER_AES2 3
class CPDF_Array;
class CPDF_CryptoHandler;
class CPDF_Dictionary;
class CPDF_Parser;
class CPDF_SecurityHandler {
public:
CPDF_SecurityHandler();
~CPDF_SecurityHandler();
bool OnInit(const CPDF_Dictionary* pEncryptDict,
const CPDF_Array* pIdArray,
const ByteString& password);
void OnCreate(CPDF_Dictionary* pEncryptDict,
const CPDF_Array* pIdArray,
const ByteString& user_password,
const ByteString& owner_password);
void OnCreate(CPDF_Dictionary* pEncryptDict,
const CPDF_Array* pIdArray,
const ByteString& user_password);
uint32_t GetPermissions() const;
bool IsMetadataEncrypted() const;
ByteString GetUserPassword(const ByteString& owner_password,
int32_t key_len) const;
bool CheckPassword(const ByteString& user_password,
bool bOwner,
uint8_t* key,
int key_len);
CPDF_CryptoHandler* GetCryptoHandler() const {
return m_pCryptoHandler.get();
}
private:
bool LoadDict(const CPDF_Dictionary* pEncryptDict);
bool LoadDict(const CPDF_Dictionary* pEncryptDict,
int& cipher,
int& key_len);
bool CheckUserPassword(const ByteString& password,
bool bIgnoreEncryptMeta,
uint8_t* key,
int32_t key_len);
bool CheckOwnerPassword(const ByteString& password,
uint8_t* key,
int32_t key_len);
bool AES256_CheckPassword(const ByteString& password,
bool bOwner,
uint8_t* key);
void AES256_SetPassword(CPDF_Dictionary* pEncryptDict,
const ByteString& password,
bool bOwner,
const uint8_t* key);
void AES256_SetPerms(CPDF_Dictionary* pEncryptDict,
uint32_t permission,
bool bEncryptMetadata,
const uint8_t* key);
void OnCreateInternal(CPDF_Dictionary* pEncryptDict,
const CPDF_Array* pIdArray,
const ByteString& user_password,
const ByteString& owner_password,
bool bDefault);
bool CheckSecurity(const ByteString& password);
void InitCryptoHandler();
int m_Version;
int m_Revision;
ByteString m_FileId;
uint32_t m_Permissions;
int m_Cipher;
int m_KeyLen;
bool m_bOwnerUnlocked;
UnownedPtr<const CPDF_Dictionary> m_pEncryptDict;
std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
uint8_t m_EncryptKey[32];
};
#endif // CORE_FPDFAPI_PARSER_CPDF_SECURITY_HANDLER_H_
|
