Diff: crypto/crypto_aes_128.h

Revision:

4:cbaf466d717d

Parent:

2:527a66d0a1a9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/crypto_aes_128.h	Tue Jun 10 14:23:09 2014 +0000
@@ -0,0 +1,63 @@
+/*
+MiniTLS - A super trimmed down TLS/SSL Library for embedded devices
+Author: Donatien Garnier
+Copyright (C) 2013-2014 AppNearMe Ltd
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*//**
+ * \file crypto_aes_128.h
+ * \copyright Copyright (c) AppNearMe Ltd 2013
+ * \author Donatien Garnier
+ */
+
+#ifndef CRYPTO_AES_128_H_
+#define CRYPTO_AES_128_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "inc/minitls_errors.h"
+
+#define AES_128_KEY_SIZE 16 //128 bits
+#define AES_128_BLOCK_SIZE AES_128_KEY_SIZE
+
+//This cipher is based on the Rijndael cipher and the rijndael.c reference implementation
+
+#define AES_128_EXPANDED_KEY_SIZE (28 + AES_128_KEY_SIZE)
+
+typedef enum __crypto_aes_128_key_expansion_type
+{
+  expand_encryption_key,
+  expand_decryption_key,
+} crypto_aes_128_key_expansion_type_t;
+
+//One-way implementation only
+typedef struct __crypto_aes_128
+{
+  uint32_t expanded_key[AES_128_EXPANDED_KEY_SIZE];
+} crypto_aes_128_t;
+
+//Asymmetric impl: To diminish key sizes, only the AES encipher OR decipher operation can be executed - on the other side, only the reverse operation is executed
+void crypto_aes_128_init(crypto_aes_128_t* aes_128, const uint8_t* key, crypto_aes_128_key_expansion_type_t expansion_type);
+
+void crypto_aes_128_encrypt(crypto_aes_128_t* aes_128, const uint8_t* plaintext, uint8_t* ciphertext);
+void crypto_aes_128_decrypt(crypto_aes_128_t* aes_128, const uint8_t* ciphertext, uint8_t* plaintext);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CRYPTO_AES_128_H_ */