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authorMark Haines <mjark@negativecurvature.net>2015-02-26 16:43:06 +0000
committerMark Haines <mjark@negativecurvature.net>2015-02-26 16:43:06 +0000
commit15bb93321fdf9c5ec2c75e03f9a1bb5fdf8b7e10 (patch)
treed754f9776a62095d5adfb257134f7bcff54c1157 /lib/crypto-algorithms/des.h
parent6c56bcf2fd3db38c679b9cf9345051a7309fa02f (diff)
parentc61e5359cb454ae20c0b7b057c3a7b53e2beefd6 (diff)
Merge commit 'c61e5359cb454ae20c0b7b057c3a7b53e2beefd6' as 'lib/crypto-algorithms'
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+/*********************************************************************
+* Filename: des.h
+* Author: Brad Conte (brad AT bradconte.com)
+* Copyright:
+* Disclaimer: This code is presented "as is" without any guarantees.
+* Details: Defines the API for the corresponding DES implementation.
+ Note that encryption and decryption are defined by how
+ the key setup is performed, the actual en/de-cryption is
+ performed by the same function.
+*********************************************************************/
+
+#ifndef DES_H
+#define DESH
+
+/*************************** HEADER FILES ***************************/
+#include <stddef.h>
+
+/****************************** MACROS ******************************/
+#define DES_BLOCK_SIZE 8 // DES operates on 8 bytes at a time
+
+/**************************** DATA TYPES ****************************/
+typedef unsigned char BYTE; // 8-bit byte
+typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
+
+typedef enum {
+ DES_ENCRYPT,
+ DES_DECRYPT
+} DES_MODE;
+
+/*********************** FUNCTION DECLARATIONS **********************/
+void des_key_setup(const BYTE key[], BYTE schedule[][6], DES_MODE mode);
+void des_crypt(const BYTE in[], BYTE out[], const BYTE key[][6]);
+
+void three_des_key_setup(const BYTE key[], BYTE schedule[][16][6], DES_MODE mode);
+void three_des_crypt(const BYTE in[], BYTE out[], const BYTE key[][16][6]);
+
+#endif // DES_H