1 files changed, 147 insertions, 0 deletions
diff --git a/include/oox/crypto/AgileEngine.hxx b/include/oox/crypto/AgileEngine.hxx
new file mode 100644
index 000000000..ece492871
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+++ b/include/oox/crypto/AgileEngine.hxx
@@ -0,0 +1,147 @@
+/* -*- 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_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
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */