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/*
* lib/crypto/t_prng.c
*
* Copyright (C) 2001 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. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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.
*
* This file contains tests for the PRNG code in Kerberos. It reads
* an input file, and writes an output file. It is assumed that the
* output file will be diffed against expected output to see whether
* regression tests pass. The input file has a very primitive format.
* It is composed of alternating seeds and outputs. The first line in
* the file is an integer source id from the krb5_c_randsource enum in
* krb5.h. Then an integer seed length is read. Then that many bytes
* (encoded in hex) are read; whitespace or newlines may be inserted
* between bytes. Then after the seed data is an integer describing
* how many bytes of output should be written. Then another source ID
* and seed length is read. If the seed length is 0, the source id is
* ignored and the seed is not seeded.
*/
#include "k5-int.h"
#include <assert.h>
int main () {
krb5_error_code ret;
krb5_data input, output;
unsigned int source_id, seed_length;
unsigned int i;
while (1) {
/* Read source*/
if (scanf ("%u", &source_id ) == EOF )
break;
/* Read seed length*/
if (scanf ("%u", &seed_length) == EOF)
break;
if (seed_length ) {
unsigned int lc;
assert ((input.data = malloc(seed_length)) != NULL);
for (lc = seed_length; lc > 0; lc--) {
scanf ("%2x", &i);
input.data[seed_length-lc] = (unsigned) (i&0xff);
}
input.length = seed_length;
assert (krb5_c_random_add_entropy (0, source_id, &input) == 0);
free (input.data);
input.data = NULL;
}
if (scanf ("%u", &i) == EOF)
break;
if (i) {
assert ((output.data = malloc (i)) != NULL);
output.length = i;
ret = krb5_c_random_make_octets (0, &output);
if (ret)
printf ("failed\n");
else {
for (; i > 0; i--) {
printf ("%02x",
(unsigned int) ((unsigned char ) output.data[output.length-i]));
}
printf ("\n");
}
free (output.data);
output.data = NULL;
}
}
return (0);
}
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