Split tunnel-specific crypto from aes.h/cpp.

tunnel/TunnelCrypto.h

@@ -0,0 +1,49 @@
+#ifndef TUNNEL_CRYPTO_H__
+#define TUNNEL_CRYPTO_H__
+
+#include "crypto/aes.h"
+
+namespace i2p {
+namespace crypto {
+
+class TunnelEncryption { // with double IV encryption
+public:
+    void SetKeys (const AESKey& layerKey, const AESKey& ivKey);
+
+    void Encrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data)     
+
+private:
+
+    ECBEncryption m_IVEncryption;
+#ifdef AESNI
+    ECBEncryption m_LayerEncryption;
+#else
+    CBCEncryption m_LayerEncryption;
+#endif
+};
+
+class TunnelDecryption { // with double IV encryption
+public:
+
+    void SetKeys (const AESKey& layerKey, const AESKey& ivKey)
+    {
+        m_LayerDecryption.SetKey (layerKey);
+        m_IVDecryption.SetKey (ivKey);
+    }           
+
+    void Decrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data) 
+
+private:
+
+    ECBDecryption m_IVDecryption;
+#ifdef AESNI
+    ECBDecryption m_LayerDecryption;
+#else
+    CBCDecryption m_LayerDecryption;
+#endif
+};
+
+} // crypto
+} // i2p
+
+#endif