main.c

用c语言实现的des加密解密程序源码

#include <stdio.h>
#include "des.h"

int main(int argc, char* argv[])
{
	BYTE data[64];
	BYTE key[64];
	int len;
	int i;

	memset(data, 0, sizeof(data));
	memset(key,  0, sizeof(key));

	printf("Please input a string:\n");
	gets(data);
	len = strlen(data);
	printf("Please input a key:\n");
	gets(key);
	
	printf("Original  data: %s\n", data);
	des(data, key, len);

	printf("Encrypted data: ");
	for (i = 0; i < len; i++)
		printf("%02X", data[i]);
	printf("\n");
	
	Ddes(data, key, len);
	printf("Decrypted data: %s\n", data);

	printf("\nPress Enter to exit...\n");
	getchar();
	return 0;
	system("PAUSE");
}