1 files changed, 120 insertions, 0 deletions
diff --git a/include/oox/crypto/CryptTools.hxx b/include/oox/crypto/CryptTools.hxx
new file mode 100644
index 000000000..c8c142007
--- /dev/null
+++ b/include/oox/crypto/CryptTools.hxx
@@ -0,0 +1,120 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_OOX_CRYPTO_CRYPTTOOLS_HXX
+#define INCLUDED_OOX_CRYPTO_CRYPTTOOLS_HXX
+
+#include <oox/dllapi.h>
+#include <sal/types.h>
+
+#include <vector>
+#include <memory>
+
+namespace oox::crypto {
+
+/** Rounds up the input to the nearest multiple
+ *
+ *  For example:
+ *  input  1, multiple 16 = 16
+ *  input 16, multiple 16 = 16
+ *  input 17, multiple 16 = 32
+ *  input 31, multiple 16 = 32
+ */
+template<typename T>
+T roundUp(T input, T multiple)
+{
+    if (input % multiple == 0)
+        return input;
+    return ((input / multiple) * multiple) + multiple;
+}
+
+enum class CryptoHashType
+{
+    SHA1,
+    SHA256,
+    SHA512
+};
+
+struct CryptoImpl;
+
+class OOX_DLLPUBLIC Crypto
+{
+public:
+    enum CryptoType
+    {
+        UNKNOWN,
+        AES_128_ECB,
+        AES_128_CBC,
+        AES_256_CBC,
+    };
+
+protected:
+    std::unique_ptr<CryptoImpl> mpImpl;
+
+protected:
+    Crypto();
+
+public:
+    virtual ~Crypto();
+};
+
+class Decrypt final : public Crypto
+{
+public:
+    Decrypt(std::vector<sal_uInt8>& key, std::vector<sal_uInt8>& iv, CryptoType type);
+
+    sal_uInt32 update(
+                    std::vector<sal_uInt8>& output,
+                    std::vector<sal_uInt8>& input,
+                    sal_uInt32 inputLength = 0);
+
+
+    static sal_uInt32 aes128ecb(
+                    std::vector<sal_uInt8>& output,
+                    std::vector<sal_uInt8>& input,
+                    std::vector<sal_uInt8>& key );
+
+};
+
+class Encrypt final : public Crypto
+{
+public:
+    Encrypt(std::vector<sal_uInt8>& key, std::vector<sal_uInt8>& iv, CryptoType type);
+
+    sal_uInt32 update(
+                    std::vector<sal_uInt8>& output,
+                    std::vector<sal_uInt8>& input,
+                    sal_uInt32 inputLength = 0);
+};
+
+class OOX_DLLPUBLIC CryptoHash final : public Crypto
+{
+    sal_Int32 mnHashSize;
+public:
+    CryptoHash(std::vector<sal_uInt8>& rKey, CryptoHashType eType);
+    bool update(std::vector<sal_uInt8>& rInput, sal_uInt32 nInputLength = 0);
+    std::vector<sal_uInt8> finalize();
+};
+
+
+} // namespace oox::crypto
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */