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/*
* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: entropy2_test.c,v 1.16 2007/06/19 23:46:59 tbox Exp $ */
/*! \file */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <isc/entropy.h>
#include <isc/keyboard.h>
#include <isc/mem.h>
#include <isc/string.h>
#include <isc/time.h>
#include <isc/util.h>
static void
hex_dump(const char *msg, void *data, unsigned int length) {
unsigned int len;
unsigned char *base;
isc_boolean_t first = ISC_TRUE;
base = data;
printf("DUMP of %d bytes: %s\n\t", length, msg);
for (len = 0; len < length; len++) {
if (len % 16 == 0 && !first)
printf("\n\t");
printf("%02x ", base[len]);
first = ISC_FALSE;
}
printf("\n");
}
static void
CHECK(const char *msg, isc_result_t result) {
if (result != ISC_R_SUCCESS) {
printf("FAILURE: %s: %s\n", msg, isc_result_totext(result));
exit(1);
}
}
static isc_result_t
start(isc_entropysource_t *source, void *arg, isc_boolean_t blocking) {
isc_keyboard_t *kbd = (isc_keyboard_t *)arg;
UNUSED(source);
if (blocking)
printf("start called, blocking mode.\n");
else
printf("start called, non-blocking mode.\n");
return (isc_keyboard_open(kbd));
}
static void
stop(isc_entropysource_t *source, void *arg) {
isc_keyboard_t *kbd = (isc_keyboard_t *)arg;
UNUSED(source);
printf("ENOUGH! Stop typing, please.\r\n");
(void)isc_keyboard_close(kbd, 3);
printf("stop called\n");
}
static isc_result_t
get(isc_entropysource_t *source, void *arg, isc_boolean_t blocking) {
isc_keyboard_t *kbd = (isc_keyboard_t *)arg;
isc_result_t result;
isc_time_t t;
isc_uint32_t sample;
isc_uint32_t extra;
unsigned char c;
if (!blocking)
return (ISC_R_NOENTROPY);
result = isc_keyboard_getchar(kbd, &c);
if (result != ISC_R_SUCCESS)
return (result);
TIME_NOW(&t);
sample = isc_time_nanoseconds(&t);
extra = c;
result = isc_entropy_addcallbacksample(source, sample, extra);
if (result != ISC_R_SUCCESS) {
printf("\r\n");
return (result);
}
printf(".");
fflush(stdout);
return (result);
}
int
main(int argc, char **argv) {
isc_mem_t *mctx;
unsigned char buffer[512];
isc_entropy_t *ent;
isc_entropysource_t *source;
unsigned int returned;
unsigned int flags;
isc_result_t result;
isc_keyboard_t kbd;
UNUSED(argc);
UNUSED(argv);
mctx = NULL;
CHECK("isc_mem_create()",
isc_mem_create(0, 0, &mctx));
ent = NULL;
CHECK("isc_entropy_create()",
isc_entropy_create(mctx, &ent));
isc_entropy_stats(ent, stderr);
source = NULL;
result = isc_entropy_createcallbacksource(ent, start, get, stop, &kbd,
&source);
CHECK("isc_entropy_createcallbacksource()", result);
fprintf(stderr,
"Reading 32 bytes of GOOD random data only, partial OK\n");
flags = 0;
flags |= ISC_ENTROPY_GOODONLY;
flags |= ISC_ENTROPY_PARTIAL;
flags |= ISC_ENTROPY_BLOCKING;
returned = 0;
result = isc_entropy_getdata(ent, buffer, 32, &returned, flags);
if (result == ISC_R_NOENTROPY) {
fprintf(stderr, "No entropy.\r\n");
}
isc_entropy_stopcallbacksources(ent);
hex_dump("good data only:", buffer, returned);
isc_entropy_stats(ent, stderr);
isc_entropy_destroysource(&source);
isc_entropy_detach(&ent);
isc_mem_stats(mctx, stderr);
isc_mem_destroy(&mctx);
return (0);
}
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