moved project source base

lib/Crypto/EAX.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2015 Southern Storm Software, Pty Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef CRYPTO_EAX_h
+#define CRYPTO_EAX_h
+
+#include "AuthenticatedCipher.h"
+#include "BlockCipher.h"
+#include "OMAC.h"
+
+class EAXCommon : public AuthenticatedCipher
+{
+public:
+    virtual ~EAXCommon();
+
+    size_t keySize() const;
+    size_t ivSize() const;
+    size_t tagSize() const;
+
+    bool setKey(const uint8_t *key, size_t len);
+    bool setIV(const uint8_t *iv, size_t len);
+
+    void encrypt(uint8_t *output, const uint8_t *input, size_t len);
+    void decrypt(uint8_t *output, const uint8_t *input, size_t len);
+
+    void addAuthData(const void *data, size_t len);
+
+    void computeTag(void *tag, size_t len);
+    bool checkTag(const void *tag, size_t len);
+
+    void clear();
+
+protected:
+    EAXCommon();
+    void setBlockCipher(BlockCipher *cipher)
+    {
+        omac.setBlockCipher(cipher);
+    }
+
+private:
+    struct {
+        uint8_t counter[16];
+        uint8_t stream[16];
+        uint8_t tag[16];
+        uint8_t hash[16];
+        uint8_t encPosn;
+        uint8_t authMode;
+    } state;
+    OMAC omac;
+
+    void closeAuthData();
+    void encryptCTR(uint8_t *output, const uint8_t *input, size_t len);
+    void closeTag();
+};
+
+template <typename T>
+class EAX : public EAXCommon
+{
+public:
+    EAX() { setBlockCipher(&cipher); }
+
+private:
+    T cipher;
+};
+
+#endif