added lib dir

lib/aes.h

@@ -0,0 +1,45 @@
+/*
+ *  this file comes from https://github.com/kokke/tiny-AES128-C
+ */
+
+#ifndef _AES_H_
+#define _AES_H_
+
+#include <stdint.h>
+
+
+// #define the macros below to 1/0 to enable/disable the mode of operation.
+//
+// CBC enables AES encryption in CBC-mode of operation.
+// ECB enables the basic ECB 16-byte block algorithm. Both can be enabled simultaneously.
+
+// The #ifndef-guard allows it to be configured before #include'ing or at compile time.
+#ifndef CBC
+  #define CBC 1
+#endif
+
+#ifndef ECB
+  #define ECB 1
+#endif
+
+#define AES128 1
+//#define AES192 1
+//#define AES256 1
+
+#if defined(ECB) && (ECB == 1)
+
+void AES_ECB_encrypt(const uint8_t* input, const uint8_t* key, uint8_t *output, const uint32_t length);
+void AES_ECB_decrypt(const uint8_t* input, const uint8_t* key, uint8_t *output, const uint32_t length);
+
+#endif // #if defined(ECB) && (ECB == !)
+
+
+#if defined(CBC) && (CBC == 1)
+
+void AES_CBC_encrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, const uint8_t* key, const uint8_t* iv);
+void AES_CBC_decrypt_buffer(uint8_t* output, uint8_t* input, uint32_t length, const uint8_t* key, const uint8_t* iv);
+
+#endif // #if defined(CBC) && (CBC == 1)
+
+
+#endif //_AES_H_