idea.h

有关的IDEA的加解密算法

# ifndef _IDEA_DOT_H
# define _IDEA_DOT_H
# include <stdio.h>
# include <time.h>
# include <process.h>
# include <io.h>
# include <string.h>
# include <conio.h>
# define IDEAKEYSIZE 16
# define IDEABLOCKSIZE 8
# define word16 unsigned short int
# define word32 unsigned long int
# define ROUNDS 8
# define KEYLEN (6*ROUNDS+4)
# define tempfilename "tempfile.enc"
int end_of_file,noisy,overwrite;       /*全面变量*/
# define low16(x)((x)& 0xffff)
typedef unsigned short int uint16;
typedef word16 IDEAkey[KEYLEN];
void en_key_idea_(word16 userkey[8],IDEAkey Z);
void de_key_idea(IDEAkey Z,IDEAkey DK);
void cipher_idea(word16 in[4],word16 out[4],IDEAkey Z);
uint16 inv(uint16 x);
uint16 mul(uint16 a,uint16 b);
char read_char_from_file(FILE *fp);
word16 read_word16_from_file(FILE *fp);
void write_char_to_file(char data,FILE *fp);
void write_word16_to_file(word16 data,FILE *fp);
void cipher_file(FILE *in,FILE *out,word16 *key);
void decipher_file(FILE *in,FILE *out,word16 *key);
void swap_file_and_clean_up(char *file);
#endif