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/* unixcert.c,v 3.1 1993/07/06 01:05:14 jbj Exp
* This file, and the certdata file, shamelessly stolen
* from Phil Karn's DES implementation.
*
* This version uses the standard Unix setkey() and encrypt()
* routines to do the encryption.
*/
#include <stdio.h>
#include <sys/types.h>
#include "ntp_stdlib.h"
static void get8 P((U_LONG *));
static void put8 P((U_LONG *));
static void do_setkey P((U_LONG *));
static void do_crypt P((U_LONG *, int));
void
main()
{
U_LONG key[2], plain[2], cipher[2], answer[2];
int i;
int test;
int fail;
for(test=0;!feof(stdin);test++){
get8(key);
do_setkey(key);
printf(" K: "); put8(key);
get8(plain);
printf(" P: "); put8(plain);
get8(answer);
printf(" C: "); put8(answer);
for(i=0;i<2;i++)
cipher[i] = plain[i];
do_crypt(cipher, 0);
for(i=0;i<2;i++)
if(cipher[i] != answer[i])
break;
fail = 0;
if(i != 2){
printf(" Encrypt FAIL");
fail++;
}
do_crypt(cipher, 1);
for(i=0;i<2;i++)
if(cipher[i] != plain[i])
break;
if(i != 2){
printf(" Decrypt FAIL");
fail++;
}
if(fail == 0)
printf(" OK");
printf("\n");
}
}
static void
get8(lp)
U_LONG *lp;
{
int t;
U_LONG l[2];
int i;
l[0] = l[1] = 0L;
for(i=0;i<8;i++){
scanf("%2x",&t);
if(feof(stdin))
exit(0);
l[i/4] <<= 8;
l[i/4] |= (U_LONG)(t & 0xff);
}
*lp = l[0];
*(lp+1) = l[1];
}
static void
put8(lp)
U_LONG *lp;
{
int i;
for(i=0;i<2;i++){
printf("%08x",*lp++);
}
}
static void
do_setkey(key)
U_LONG *key;
{
int j;
register int i;
register char *kb;
register U_LONG *kp;
char keybits[64];
kb = keybits;
kp = key;
for (j = 0; j < 2; j++) {
for (i = 0; i < 32; i++) {
if (*kp & (1<<(31-i)))
*kb++ = 1;
else
*kb++ = 0;
}
kp++;
}
setkey(keybits);
}
static void
do_crypt(data, edflag)
U_LONG *data;
int edflag;
{
int j;
register int i;
register char *bp;
register U_LONG *dp;
char block[64];
bp = block;
dp = data;
for (j = 0; j < 2; j++) {
for (i = 0; i < 32; i++) {
if (*dp & (1<<(31-i)))
*bp++ = 1;
else
*bp++ = 0;
}
dp++;
}
encrypt(block, edflag);
bp = block;
dp = data;
for (j = 0; j < 2; j++) {
*dp = 0;
for (i = 0; i < 32; i++) {
if (*bp++)
*dp |= 1<<(31-i);
}
dp++;
}
}
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