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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#ifndef INCLUDED_OOX_CRYPTO_STANDARD2007ENGINE_HXX
#define INCLUDED_OOX_CRYPTO_STANDARD2007ENGINE_HXX
#include <oox/crypto/CryptoEngine.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
namespace oox {
class BinaryXInputStream;
class BinaryXOutputStream;
}
namespace oox {
namespace core {
const sal_uInt32 ENCRYPTINFO_CRYPTOAPI = 0x00000004;
const sal_uInt32 ENCRYPTINFO_DOCPROPS = 0x00000008;
const sal_uInt32 ENCRYPTINFO_EXTERNAL = 0x00000010;
const sal_uInt32 ENCRYPTINFO_AES = 0x00000020;
const sal_uInt32 ENCRYPT_ALGO_AES128 = 0x0000660E;
const sal_uInt32 ENCRYPT_ALGO_AES192 = 0x0000660F;
const sal_uInt32 ENCRYPT_ALGO_AES256 = 0x00006610;
const sal_uInt32 ENCRYPT_ALGO_RC4 = 0x00006801;
const sal_uInt32 ENCRYPT_HASH_SHA1 = 0x00008004;
const sal_uInt32 ENCRYPT_KEY_SIZE_AES_128 = 0x00000080;
const sal_uInt32 ENCRYPT_KEY_SIZE_AES_192 = 0x000000C0;
const sal_uInt32 ENCRYPT_KEY_SIZE_AES_256 = 0x00000100;
const sal_uInt32 ENCRYPT_PROVIDER_TYPE_AES = 0x00000018;
const sal_uInt32 ENCRYPT_PROVIDER_TYPE_RC4 = 0x00000001;
// version of encryption info used in MS Office 2007 (major = 3, minor = 2)
const sal_uInt32 VERSION_INFO_2007_FORMAT = 0x00020003;
// version of encryption info used in MS Office 2007 SP2 and older (major = 4, minor = 2)
const sal_uInt32 VERSION_INFO_2007_FORMAT_SP2 = 0x00020004;
// version of encryption info - agile (major = 4, minor = 4)
const sal_uInt32 VERSION_INFO_AGILE = 0x00040004;
const sal_uInt32 SALT_LENGTH = 16;
const sal_uInt32 ENCRYPTED_VERIFIER_LENGTH = 16;
const sal_uInt32 ENCRYPTED_VERIFIER_HASH_LENGTH = 32;
struct EncryptionStandardHeader
{
sal_uInt32 flags;
sal_uInt32 sizeExtra; // 0
sal_uInt32 algId; // if flag AES && CRYPTOAPI this defaults to 128-bit AES
sal_uInt32 algIdHash; // 0: determine by flags - defaults to SHA-1 if not external
sal_uInt32 keyBits; // key size in bits: 0 (determine by flags), 128, 192, 256
sal_uInt32 providedType; // AES or RC4
sal_uInt32 reserved1; // 0
sal_uInt32 reserved2; // 0
EncryptionStandardHeader();
};
struct EncryptionVerifierAES
{
sal_uInt32 saltSize; // must be 0x00000010
sal_uInt8 salt[SALT_LENGTH]; // random generated salt value
sal_uInt8 encryptedVerifier[ENCRYPTED_VERIFIER_LENGTH]; // randomly generated verifier value
sal_uInt32 encryptedVerifierHashSize; // actually written hash size - depends on algorithm
sal_uInt8 encryptedVerifierHash[ENCRYPTED_VERIFIER_HASH_LENGTH]; // verifier value hash - itself also encrypted
EncryptionVerifierAES();
};
struct StandardEncryptionInfo
{
EncryptionStandardHeader header;
EncryptionVerifierAES verifier;
};
class Standard2007Engine : public CryptoEngine
{
StandardEncryptionInfo mInfo;
bool generateVerifier();
bool calculateEncryptionKey(const OUString& rPassword);
public:
Standard2007Engine();
virtual ~Standard2007Engine();
StandardEncryptionInfo& getInfo() { return mInfo;}
virtual bool generateEncryptionKey(const OUString& rPassword) override;
virtual void writeEncryptionInfo(
const OUString& rPassword,
BinaryXOutputStream& rStream) override;
virtual bool decrypt(
BinaryXInputStream& aInputStream,
BinaryXOutputStream& aOutputStream) override;
virtual void encrypt(
BinaryXInputStream& aInputStream,
BinaryXOutputStream& aOutputStream) override;
};
} // namespace core
} // namespace oox
#endif
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