// 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_SECURITY_HANDLER_H_
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#define CORE_FPDFAPI_FPDF_PARSER_CPDF_SECURITY_HANDLER_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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#define FXCIPHER_NONE 0
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#define FXCIPHER_RC4 1
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#define FXCIPHER_AES 2
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#define FXCIPHER_AES2 3
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#define PDF_ENCRYPT_CONTENT 0
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class CPDF_Array;
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class CPDF_CryptoHandler;
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class CPDF_Dictionary;
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class CPDF_Parser;
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class CPDF_SecurityHandler {
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public:
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CPDF_SecurityHandler();
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~CPDF_SecurityHandler();
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FX_BOOL OnInit(CPDF_Parser* pParser, CPDF_Dictionary* pEncryptDict);
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uint32_t GetPermissions();
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FX_BOOL GetCryptInfo(int& cipher, const uint8_t*& buffer, int& keylen);
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bool IsMetadataEncrypted() const;
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CPDF_CryptoHandler* CreateCryptoHandler();
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void OnCreate(CPDF_Dictionary* pEncryptDict,
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CPDF_Array* pIdArray,
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const uint8_t* user_pass,
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uint32_t user_size,
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const uint8_t* owner_pass,
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uint32_t owner_size,
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uint32_t type = PDF_ENCRYPT_CONTENT);
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void OnCreate(CPDF_Dictionary* pEncryptDict,
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CPDF_Array* pIdArray,
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const uint8_t* user_pass,
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uint32_t user_size,
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uint32_t type = PDF_ENCRYPT_CONTENT);
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CFX_ByteString GetUserPassword(const uint8_t* owner_pass,
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uint32_t pass_size,
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int32_t key_len);
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int CheckPassword(const uint8_t* password,
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uint32_t pass_size,
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FX_BOOL bOwner,
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uint8_t* key,
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int key_len);
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private:
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FX_BOOL LoadDict(CPDF_Dictionary* pEncryptDict);
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FX_BOOL LoadDict(CPDF_Dictionary* pEncryptDict,
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uint32_t type,
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int& cipher,
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int& key_len);
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FX_BOOL CheckUserPassword(const uint8_t* password,
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uint32_t pass_size,
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FX_BOOL bIgnoreEncryptMeta,
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uint8_t* key,
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int32_t key_len);
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FX_BOOL CheckOwnerPassword(const uint8_t* password,
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uint32_t pass_size,
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uint8_t* key,
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int32_t key_len);
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FX_BOOL AES256_CheckPassword(const uint8_t* password,
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uint32_t size,
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FX_BOOL bOwner,
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uint8_t* key);
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void AES256_SetPassword(CPDF_Dictionary* pEncryptDict,
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const uint8_t* password,
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uint32_t size,
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FX_BOOL bOwner,
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const uint8_t* key);
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void AES256_SetPerms(CPDF_Dictionary* pEncryptDict,
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uint32_t permission,
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FX_BOOL bEncryptMetadata,
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const uint8_t* key);
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void OnCreate(CPDF_Dictionary* pEncryptDict,
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CPDF_Array* pIdArray,
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const uint8_t* user_pass,
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uint32_t user_size,
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const uint8_t* owner_pass,
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uint32_t owner_size,
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FX_BOOL bDefault,
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uint32_t type);
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FX_BOOL CheckSecurity(int32_t key_len);
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int m_Version;
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int m_Revision;
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CPDF_Parser* m_pParser;
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CPDF_Dictionary* m_pEncryptDict;
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uint32_t m_Permissions;
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int m_Cipher;
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uint8_t m_EncryptKey[32];
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int m_KeyLen;
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bool m_bOwnerUnlocked;
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};
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#endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_SECURITY_HANDLER_H_
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