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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_SECURITY_HANDLER_H_
#define CORE_FPDFAPI_PARSER_CPDF_SECURITY_HANDLER_H_
#include "core/fpdfapi/parser/cpdf_crypto_handler.h"
#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
#define PDF_ENCRYPT_CONTENT 0
class CPDF_Array;
class CPDF_Dictionary;
class CPDF_Parser;
class CPDF_SecurityHandler {
public:
CPDF_SecurityHandler();
~CPDF_SecurityHandler();
bool OnInit(CPDF_Parser* pParser, CPDF_Dictionary* pEncryptDict);
uint32_t GetPermissions();
bool GetCryptInfo(int& cipher, const uint8_t*& buffer, int& keylen);
bool IsMetadataEncrypted() const;
void OnCreate(CPDF_Dictionary* pEncryptDict,
CPDF_Array* pIdArray,
const uint8_t* user_pass,
uint32_t user_size,
const uint8_t* owner_pass,
uint32_t owner_size,
uint32_t type = PDF_ENCRYPT_CONTENT);
void OnCreate(CPDF_Dictionary* pEncryptDict,
CPDF_Array* pIdArray,
const uint8_t* user_pass,
uint32_t user_size,
uint32_t type = PDF_ENCRYPT_CONTENT);
CFX_ByteString GetUserPassword(const uint8_t* owner_pass,
uint32_t pass_size,
int32_t key_len);
bool CheckPassword(const uint8_t* password,
uint32_t pass_size,
bool bOwner,
uint8_t* key,
int key_len);
private:
bool LoadDict(CPDF_Dictionary* pEncryptDict);
bool LoadDict(CPDF_Dictionary* pEncryptDict,
uint32_t type,
int& cipher,
int& key_len);
bool CheckUserPassword(const uint8_t* password,
uint32_t pass_size,
bool bIgnoreEncryptMeta,
uint8_t* key,
int32_t key_len);
bool CheckOwnerPassword(const uint8_t* password,
uint32_t pass_size,
uint8_t* key,
int32_t key_len);
bool AES256_CheckPassword(const uint8_t* password,
uint32_t size,
bool bOwner,
uint8_t* key);
void AES256_SetPassword(CPDF_Dictionary* pEncryptDict,
const uint8_t* password,
uint32_t size,
bool bOwner,
const uint8_t* key);
void AES256_SetPerms(CPDF_Dictionary* pEncryptDict,
uint32_t permission,
bool bEncryptMetadata,
const uint8_t* key);
void OnCreate(CPDF_Dictionary* pEncryptDict,
CPDF_Array* pIdArray,
const uint8_t* user_pass,
uint32_t user_size,
const uint8_t* owner_pass,
uint32_t owner_size,
bool bDefault,
uint32_t type);
bool CheckSecurity(int32_t key_len);
int m_Version;
int m_Revision;
CFX_UnownedPtr<CPDF_Parser> m_pParser;
CFX_UnownedPtr<CPDF_Dictionary> m_pEncryptDict;
uint32_t m_Permissions;
int m_Cipher;
uint8_t m_EncryptKey[32];
int m_KeyLen;
bool m_bOwnerUnlocked;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_SECURITY_HANDLER_H_
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