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/*
* lib/crypto/des/destest.c
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* Test a DES implementation against known inputs & outputs
*/
#include <krb5/krb5.h>
#include <krb5/mit-des.h>
#include <krb5/ext-proto.h>
#include <com_err.h>
extern int errno;
extern mit_des_ecb_encrypt();
#include <stdio.h>
void convert();
void
main(argc, argv)
int argc;
char *argv[];
{
char block1[17], block2[17], block3[17];
krb5_encrypt_block eblock;
krb5_keyblock keyblock;
mit_des_cblock key, input, output, output2;
krb5_error_code retval;
int num = 0;
int error = 0;
/* do some initialisation */
initialize_krb5_error_table();
krb5_use_cstype(&eblock, ETYPE_DES_CBC_CRC);
keyblock.magic = KV5M_KEYBLOCK;
keyblock.etype = ETYPE_DES_CBC_CRC;
keyblock.keytype = KEYTYPE_DES;
keyblock.length = sizeof (mit_des_cblock);
keyblock.contents = (krb5_octet *)key;
while (scanf("%16s %16s %16s", block1, block2, block3) == 3) {
convert(block1, key);
convert(block2, input);
convert(block3, output);
if (retval = krb5_process_key(&eblock,&keyblock)) {
com_err("des test", retval, "can't process key");
exit(-1);
}
mit_des_ecb_encrypt(input, output2,
(struct mit_des_ks_struct *)eblock.priv,1);
if (memcmp((char *)output2, (char *)output, 8)) {
fprintf(stderr,
"DES ENCRYPT ERROR, key %s, text %s, real cipher %s, computed cyphertext %02X%02X%02X%02X%02X%02X%02X%02X\n",
block1, block2, block3,
output2[0],output2[1],output2[2],output2[3],
output2[4],output2[5],output2[6],output2[7]);
error++;
}
/*
* Now try decrypting....
*/
mit_des_ecb_encrypt(output, output2,
(struct mit_des_ks_struct *)eblock.priv,0);
if (memcmp((char *)output2, (char *)input, 8)) {
fprintf(stderr,
"DES DECRYPT ERROR, key %s, text %s, real cipher %s, computed cleartext %02X%02X%02X%02X%02X%02X%02X%02X\n",
block1, block2, block3,
output2[0],output2[1],output2[2],output2[3],
output2[4],output2[5],output2[6],output2[7]);
error++;
}
if (retval = krb5_finish_key(&eblock)) {
com_err("des verify", retval, "can't finish key");
exit(-1);
}
num++;
}
if (error)
printf("destest: failed to pass the test\n");
else
printf("destest: %d tests passed successfully\n", num);
exit( (error > 256 && error % 256) ? 1 : error);
}
unsigned int value[128] = {
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, -1, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
};
void
convert(text, cblock)
char *text;
unsigned char cblock[];
{
register int i;
for (i = 0; i < 8; i++) {
if (value[text[i*2]] == -1 || value[text[i*2+1]] == -1) {
printf("Bad value byte %d in %s\n", i, text);
exit(1);
}
cblock[i] = 16*value[text[i*2]] + value[text[i*2+1]];
}
return;
}
/*
* Fake out the DES library, for the purposes of testing.
*/
#include "des.h"
int
mit_des_is_weak_key(key)
mit_des_cblock key;
{
return 0; /* fake it out for testing */
}
void
des_cblock_print_file(x, fp)
mit_des_cblock x;
FILE *fp;
{
unsigned char *y = (unsigned char *) x;
register int i = 0;
fprintf(fp," 0x { ");
while (i++ < 8) {
fprintf(fp,"%x",*y++);
if (i < 8)
fprintf(fp,", ");
}
fprintf(fp," }");
}
#define smask(step) ((1<<step)-1)
#define pstep(x,step) (((x)&smask(step))^(((x)>>step)&smask(step)))
#define parity_char(x) pstep(pstep(pstep((x),4),2),1)
/*
* des_check_key_parity: returns true iff key has the correct des parity.
* See des_fix_key_parity for the definition of
* correct des parity.
*/
int
mit_des_check_key_parity(key)
register des_cblock key;
{
int i;
for (i=0; i<sizeof(des_cblock); i++) {
if ((key[i] & 1) == parity_char(0xfe&key[i])) {
printf("warning: bad parity key:");
des_cblock_print_file(key, stdout);
putchar('\n');
return 1;
}
}
return(1);
}
void
mit_des_fixup_key_parity(key)
register des_cblock key;
{
int i;
for (i=0; i<sizeof(des_cblock); i++)
{
key[i] &= 0xfe;
key[i] |= 1^parity_char(key[i]);
}
return;
}
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