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/*
* Fast DES evaluation & benchmarking for UNIX
* Compares output of fencrypt()/fsetkey() with UNIX crypt()/encrypt()/setkey()
* and measures speed using times().
*/
#include <stdio.h>
#include <stdlib.h>
#if USG
#include <sys/types.h>
#endif /*USG*/
#include <sys/param.h> /* for HZ */
#include <sys/times.h>
#include <crypt.h>
#include "des56.h"
typedef struct {
char b[8];
} chunk;
#ifdef CRAY
# define USG 1
#endif /*CRAY*/
#ifndef USG
# define USG 0
#endif /*!USG*/
#if BSD >= 43 && defined(vax) && !defined(HZ)
# define HZ 100
#endif
char *
bprint(char b[64])
{
static char s[17];
register int i;
for(i = 0; i < 64; i += 4)
sprintf(&s[i/4], "%1x", b[i]<<3 | b[i+1]<<2 | b[i+2]<<1 | b[i+3]);
return(s);
}
char *
wprint(chunk *v)
{
static char s[17];
register int i;
for(i = 0; i < 8; i++)
sprintf(&s[2*i], "%02x", v->b[i] & 0xff);
return(s);
}
void getv(char *s, chunk *v)
{
register int i, t;
if(s[0] == '0' && s[1] == 'x')
s += 2;
for(i = 0; i < 8; i++) {
t = 0;
if(*s >= '0' && *s <= '9') t = *s++ - '0';
else if(*s >= 'a' && *s <= 'f') t = *s++ - 'a' + 10;
else if(*s >= 'A' && *s <= 'F') t = *s++ - 'A' + 10;
t <<= 4;
if(*s >= '0' && *s <= '9') t |= *s++ - '0';
else if(*s >= 'a' && *s <= 'f') t |= *s++ - 'a' + 10;
else if(*s >= 'A' && *s <= 'F') t |= *s++ - 'A' + 10;
v->b[i] = t;
if(*s == '.') {
s++;
i = 4-1;
}
}
}
void expand(chunk *v, char bits[64])
{
register unsigned int i;
for(i = 0; i < 64; i++)
bits[i] = (v->b[i/8] >> (7 - i%8)) & 1;
}
int
main(int argc, char *argv[])
{
register int i;
chunk key, olddata, newdata;
char bkey[64], bdata[64];
int decrypt = 0;
keysched KS;
if(argc < 2 || argv[1][0] == '-') {
usage:
printf("\
Usage: %s key [ -{ckCK} count ] [ data ... ]\n\
Demonstrate and/or time fast DES routines.\n\
``key'' and ``data'' are left-justified, 0-padded hex values <= 16 digits\n\
By default, encrypts & decrypts each 'data' block with both fastdes and\n\
crypt() library DES routines to show equality.\n\
-c N encrypt N times using fast DES\n\
-k N set-key N times using fast DES\n\
-C N encrypt N times using library DES\n\
%s",
argv[0],
USG ? "" : "\
-K N set-key N times using library DES\n");
exit(1);
}
getv(argv[1], &key);
fsetkey(key.b, &KS);
expand(&key, bkey);
#if USG
/* System V systems don't seem to have setkey, just crypt
* so we use that to set the key.
*/
for(i = 0; i < 8; i++)
bdata[i] = (key.b[i] >> 1) | 0x80;
bdata[8] = '\0';
crypt((char *)bdata, ".."); /* Key, no salt */
#else /*!USG*/
setkey(bkey);
#endif /*!USG*/
printf("key\t%s\n", bprint(bkey));
for(i = 2; i < argc; i++) {
if(argv[i][0] == '-') {
int count, n;
char c, *op;
struct tms now, then;
c = argv[i][1];
op = &argv[i][2];
if(*op == '\0')
if((op = argv[++i]) == NULL)
goto usage;
count = atoi(op);
if(count <= 0)
count = 1;
n = count;
expand(&olddata, bdata);
times(&now);
switch(c) {
case 'c':
op = "fencrypt";
do fencrypt(newdata.b, 0, &KS); while(--n > 0); break;
case 'k':
op = "fsetkey";
do fsetkey(key.b, &KS); while(--n > 0); break;
case 'C':
op = "library encrypt";
do encrypt(bdata, decrypt); while(--n > 0); break;
case 'K':
#if USG
printf("UNIX library has no setkey() function on this system\n");
continue;
#else /*!USG*/
op = "library setkey";
do setkey(bkey); while(--n > 0); break;
#endif /*!USG*/
default:
printf("Unknown option -%c\n", c);
goto usage;
}
times(&then);
n = then.tms_utime - now.tms_utime;
printf("%d %s's in %0.2f seconds (%.2f us apiece)\n",
count, op, (float) n / HZ,
(1.0e6 * n / (HZ * count)));
} else {
/* Demonstrate that it works for a particular data block.
* To compare with UNIX encrypt(), we must play its game.
* On BSD systems, encrypt(block, 1) is the inverse of (..., 0)
* but on USG systems the second parameter is ignored and
* encrypt(block, x) always encrypts.
*/
getv(argv[i], &olddata);
newdata = olddata;
printf("\tOriginal data\t\tEncrypted\t\t%s\n",
USG ? "Encrypted again" : "Decrypted");
printf("fastdes\t%s", wprint(&olddata));
fencrypt(newdata.b, 0, &KS);
printf("\t%s", wprint(&newdata));
fencrypt(newdata.b, USG ? 0 : 1, &KS);
printf("\t%s\n", wprint(&newdata));
expand(&olddata, bdata);
printf("UNIXdes\t%s", bprint(bdata));
encrypt(bdata, 0);
printf("\t%s", bprint(bdata));
encrypt(bdata, USG ? 0 : 1);
printf("\t%s\n", bprint(bdata));
}
}
exit(0);
}
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