forgotten files

[avr-crypto-lib.git] / des.h

diff --git a/des.h b/des.h
index 241a4b5f93cec4e09e25eb3be1c2226f386e209b..082de13084e0366579dc9ba595bdd2d5b85b986d 100644 (file)
--- a/des.h
+++ b/des.h
@@ -1,24 +1,100 @@
+/* des.h */
+/*
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+*/
 /**
  * \file       des.h
  * \author     Daniel Otte 
  * \date       2007-06-16
  * \brief      des and tdes declarations
- * \par License        
- * GPL
+ * \license    GPLv3 or later
  * 
  */
 #ifndef DES_H_
 #define DES_H_
 
-#include <stdint.h>
 /* the FIPS 46-3 (1999-10-25) name for triple DES is triple data encryption algorithm so TDEA.
  * Also we only implement the three key mode  */
-#define tdea_encrypt tdes_encrypt
-#define tdea_decrypt tdes_decrypt
 
-void des_encrypt(uint8_t* out, uint8_t* in, uint8_t* key);
-void des_decrypt(uint8_t* out, uint8_t* in, uint8_t* key);
-void tdes_encrypt(uint8_t* out, uint8_t* in, uint8_t* key);
-void tdes_decrypt(uint8_t* out, uint8_t* in, uint8_t* key);
+/** \def tdea_enc
+ * \brief defining an alias for void tdes_enc(void* out, const void* in, const void* key)
+ */
+
+/** \def tdea_dec
+ * \brief defining an alias for void tdes_dec(void* out, const void* in, const void* key)
+ */
+
+#define tdea_enc tdes_enc
+#define tdea_dec tdes_dec
+
+/** \fn void des_enc(void* out, const void* in, const void* key)
+ * \brief encrypt a block with DES
+ * 
+ * This function encrypts a block of 64 bits (8 bytes) with the DES algorithm.
+ * Key expansion is done automatically. The key is 64 bits long, but note that
+ * only 56 bits are used (the LSB of each byte is droped). The input and output
+ * blocks may overlap.
+ * 
+ * \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
+ * \param in  pointer to the block (64 bit = 8 byte) where the plaintext is read from
+ * \param key pointer to the key (64 bit = 8 byte)
+ */
+void des_enc(void* out, const void* in, const void* key);
+
+/** \fn void des_dec(void* out, const void* in, const void* key)
+ * \brief decrypt a block with DES
+ * 
+ * This function decrypts a block of 64 bits (8 bytes) with the DES algorithm.
+ * Key expansion is done automatically. The key is 64 bits long, but note that
+ * only 56 bits are used (the LSB of each byte is droped). The input and output
+ * blocks may overlap.
+ * 
+ * \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
+ * \param in  pointer to the block (64 bit = 8 byte) where the ciphertext is read from
+ * \param key pointer to the key (64 bit = 8 byte)
+ */
+void des_dec(void* out, const void* in, const void* key);
+
+/** \fn void tdes_enc(void* out, const void* in, const void* key)
+ * \brief encrypt a block with Tripple-DES
+ * 
+ * This function encrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
+ * algorithm. Key expansion is done automatically. The key is 192 bits long, but
+ * note that only 178 bits are used (the LSB of each byte is droped). The input
+ * and output blocks may overlap.
+ * 
+ * \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
+ * \param in  pointer to the block (64 bit = 8 byte) where the plaintext is read from
+ * \param key pointer to the key (192 bit = 24 byte)
+ */
+void tdes_enc(void* out, const void* in, const void* key);
+
+/** \fn void tdes_dec(void* out, const void* in, const void* key)
+ * \brief decrypt a block with Tripple-DES
+ * 
+ * This function decrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
+ * algorithm. Key expansion is done automatically. The key is 192 bits long, but
+ * note that only 178 bits are used (the LSB of each byte is droped). The input
+ * and output blocks may overlap.
+ * 
+ * \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
+ * \param in  pointer to the block (64 bit = 8 byte) where the ciphertext is read from
+ * \param key pointer to the key (192 bit = 24 byte)
+ */
+ void tdes_dec(void* out, const void* in, const void* key);
 
 #endif /*DES_H_*/