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