C++ (Cpp) isc_entropy_stats Examples

Example #1

File: entropy2_test.c Project: ElRevo/xia-core

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);
}

Example #2

File: entropy_test.c Project: pombredanne/NetBSD

int
main(int argc, char **argv) {
	isc_mem_t *mctx;
	unsigned char buffer[512];
	isc_entropy_t *ent;
	unsigned int returned;
	unsigned int flags;
	isc_result_t result;

	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);

#if 1
	CHECK("isc_entropy_createfilesource() 1",
	      isc_entropy_createfilesource(ent, "/dev/random"));
	CHECK("isc_entropy_createfilesource() 2",
	      isc_entropy_createfilesource(ent, "/dev/random"));
#else
	CHECK("isc_entropy_createfilesource() 3",
	      isc_entropy_createfilesource(ent, "/tmp/foo"));
#endif

	fprintf(stderr,
		"Reading 32 bytes of GOOD random data only, partial OK\n");

	flags = 0;
	flags |= ISC_ENTROPY_GOODONLY;
	flags |= ISC_ENTROPY_PARTIAL;
	result = isc_entropy_getdata(ent, buffer, 32, &returned, flags);
	if (result == ISC_R_NOENTROPY) {
		fprintf(stderr, "No entropy.\n");
		goto any;
	}
	hex_dump("good data only:", buffer, returned);

 any:
	isc_entropy_stats(ent, stderr);
	CHECK("isc_entropy_getdata() pseudorandom",
	      isc_entropy_getdata(ent, buffer, 128, NULL, 0));
	hex_dump("pseudorandom data", buffer, 128);

	isc_entropy_stats(ent, stderr);
	flags = 0;
	flags |= ISC_ENTROPY_GOODONLY;
	flags |= ISC_ENTROPY_BLOCKING;
	result = isc_entropy_getdata(ent, buffer, sizeof(buffer), &returned,
				     flags);
	CHECK("good data only, blocking mode", result);
	hex_dump("blocking mode data", buffer, sizeof(buffer));

	{
		isc_entropy_t *entcopy1 = NULL;
		isc_entropy_t *entcopy2 = NULL;
		isc_entropy_t *entcopy3 = NULL;

		isc_entropy_attach(ent, &entcopy1);
		isc_entropy_attach(ent, &entcopy2);
		isc_entropy_attach(ent, &entcopy3);

		isc_entropy_stats(ent, stderr);

		isc_entropy_detach(&entcopy1);
		isc_entropy_detach(&entcopy2);
		isc_entropy_detach(&entcopy3);
	}

	isc_entropy_detach(&ent);
	isc_mem_stats(mctx, stderr);
	isc_mem_destroy(&mctx);

	return (0);
}