llsec: Allow for sharing AES-128

core/lib/aes-128.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013, Hasso-Plattner-Institut.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+/**
+ * \file
+ *         AES-128.
+ * \author
+ *         Konrad Krentz <konrad.krentz@gmail.com>
+ */
+
+#ifndef AES_H_
+#define AES_H_
+
+#include "contiki.h"
+
+#define AES_128_BLOCK_SIZE 16
+#define AES_128_KEY_LENGTH 16
+
+#ifdef AES_128_CONF
+#define AES_128            AES_128_CONF
+#else /* AES_128_CONF */
+#define AES_128            aes_128_driver
+#endif /* AES_128_CONF */
+
+/**
+ * Structure of AES drivers.
+ */
+struct aes_128_driver {
+  
+  /**
+   * \brief Sets the current key.
+   */
+  void (* set_key)(uint8_t *key);
+  
+  /**
+   * \brief Encrypts.
+   */
+  void (* encrypt)(uint8_t *plaintext_and_result);
+};
+
+/**
+ * \brief Pads the plaintext with zeroes before calling AES_128.encrypt
+ */
+void aes_128_padded_encrypt(uint8_t *plaintext_and_result, uint8_t plaintext_len);
+
+/**
+ * \brief Pads the key with zeroes before calling AES_128.set_key
+ */
+void aes_128_set_padded_key(uint8_t *key, uint8_t key_len);
+
+extern const struct aes_128_driver AES_128;
+
+#endif /* AES_H_ */