AgileEngine.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#ifndef INCLUDED_OOX_CRYPTO_AGILEENGINE_HXX
#define INCLUDED_OOX_CRYPTO_AGILEENGINE_HXX
 
#include <vector>
 
#include <oox/dllapi.h>
#include <oox/crypto/CryptTools.hxx>
#include <oox/crypto/CryptoEngine.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
 
namespace oox {
    class BinaryXInputStream;
    class BinaryXOutputStream;
}
 
namespace oox::crypto {
 
struct OOX_DLLPUBLIC AgileEncryptionInfo
{
    sal_Int32 spinCount;
    sal_Int32 saltSize;
    sal_Int32 keyBits;
    sal_Int32 hashSize;
    sal_Int32 blockSize;
 
    OUString cipherAlgorithm;
    OUString cipherChaining;
    OUString hashAlgorithm;
 
    std::vector<sal_uInt8> keyDataSalt;
 
    // Key Encryptor
    std::vector<sal_uInt8> saltValue;
    std::vector<sal_uInt8> encryptedVerifierHashInput;
    std::vector<sal_uInt8> encryptedVerifierHashValue;
    std::vector<sal_uInt8> encryptedKeyValue;
 
    // HMAC
    std::vector<sal_uInt8> hmacKey;
    std::vector<sal_uInt8> hmacHash;
    std::vector<sal_uInt8> hmacCalculatedHash;
    std::vector<sal_uInt8> hmacEncryptedKey; // encrypted Key
    std::vector<sal_uInt8> hmacEncryptedValue; // encrypted Hash
};
 
struct OOX_DLLPUBLIC AgileEncryptionParameters
{
    sal_Int32 spinCount;
    sal_Int32 saltSize;
    sal_Int32 keyBits;
    sal_Int32 hashSize;
    sal_Int32 blockSize;
 
    OUString cipherAlgorithm;
    OUString cipherChaining;
    OUString hashAlgorithm;
};
 
enum class AgileEncryptionPreset
{
    AES_128_SHA1,
    AES_256_SHA512,
};
 
class OOX_DLLPUBLIC AgileEngine final : public CryptoEngine
{
private:
    AgileEncryptionInfo mInfo;
    AgileEncryptionPreset meEncryptionPreset;
 
    void calculateHashFinal(const OUString& rPassword, std::vector<sal_uInt8>& aHashFinal);
 
    void calculateBlock(
            std::vector<sal_uInt8> const & rBlock,
            std::vector<sal_uInt8>& rHashFinal,
            std::vector<sal_uInt8>& rInput,
            std::vector<sal_uInt8>& rOutput);
 
    void encryptBlock(
            std::vector<sal_uInt8> const & rBlock,
            std::vector<sal_uInt8>& rHashFinal,
            std::vector<sal_uInt8>& rInput,
            std::vector<sal_uInt8>& rOutput);
 
    static Crypto::CryptoType cryptoType(const AgileEncryptionInfo& rInfo);
 
public:
    AgileEngine();
 
    AgileEncryptionInfo& getInfo() { return mInfo;}
 
    void setPreset(AgileEncryptionPreset ePreset)
    {
        meEncryptionPreset = ePreset;
    }
 
    // Decryption
 
    void decryptEncryptionKey(OUString const & rPassword);
    bool decryptAndCheckVerifierHash(OUString const & rPassword);
 
    bool generateEncryptionKey(OUString const & rPassword) override;
    bool readEncryptionInfo(css::uno::Reference<css::io::XInputStream> & rxInputStream) override;
    bool decrypt(BinaryXInputStream& aInputStream,
                 BinaryXOutputStream& aOutputStream) override;
 
    bool checkDataIntegrity() override;
 
    bool decryptHmacKey();
    bool decryptHmacValue();
 
    // Encryption
 
    void writeEncryptionInfo(BinaryXOutputStream& rStream) override;
 
    void encrypt(const css::uno::Reference<css::io::XInputStream>&  rxInputStream,
                 css::uno::Reference<css::io::XOutputStream>& rxOutputStream,
                 sal_uInt32 nSize) override;
 
    bool setupEncryption(OUString const & rPassword) override;
 
    bool generateAndEncryptVerifierHash(OUString const & rPassword);
 
    bool encryptHmacKey();
    bool encryptHmacValue();
 
    bool encryptEncryptionKey(OUString const & rPassword);
    void setupEncryptionParameters(AgileEncryptionParameters const & rAgileEncryptionParameters);
    bool setupEncryptionKey(OUString const & rPassword);
};
 
} // namespace oox::crypto
 
#endif
 
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