www.pudn.com > speakFreely-code.zip > DESCERT.C

#include  
#include  
 
#include "ndes.h" 
 
void get8(cp) 
char *cp; 
{ 
	int i,t; 
 
	for(i=0;i<8;i++){ 
		scanf("%2x",&t); 
		if(feof(stdin)) 
			exit(0); 
		*cp++ = t; 
	} 
} 
 
void put8(cp) 
char *cp; 
{ 
	int i; 
 
	for(i=0;i<8;i++){ 
		printf("%02x",*cp++ & 0xff); 
	} 
} 
 
int main(void) 
{ 
	char key[8],plain[8],cipher[8],answer[8]; 
	int i; 
	int test; 
	int fail; 
 
	desinit(0); 
 
	for(test=0;!feof(stdin);test++){ 
 
		get8(key); 
		printf(" K: "); put8(key); 
		setkey(key); 
 
		get8(plain); 
		printf(" P: "); put8(plain); 
 
		get8(answer); 
		printf(" C: "); put8(answer); 
 
		for(i=0;i<8;i++) 
			cipher[i] = plain[i]; 
		endes(cipher); 
 
		for(i=0;i<8;i++) 
			if(cipher[i] != answer[i]) 
				break; 
		fail = 0; 
		if(i != 8){ 
			printf(" Encrypt FAIL"); 
			printf("\n R: "); put8(cipher); 
			fail++; 
		} 
		dedes(cipher); 
		for(i=0;i<8;i++) 
			if(cipher[i] != plain[i]) 
				break; 
		if(i != 8){ 
			printf(" Decrypt FAIL"); 
			fail++; 
		} 
		if(fail == 0) 
			printf(" OK"); 
		printf("\n"); 
	} 
	return 0; 
}