1 files changed, 84 insertions, 0 deletions
diff --git a/tests/isc/crc64_test.c b/tests/isc/crc64_test.c
new file mode 100644
index 0000000..cb96437
--- /dev/null
+++ b/tests/isc/crc64_test.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/* ! \file */
+
+#include <inttypes.h>
+#include <sched.h> /* IWYU pragma: keep */
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define UNIT_TESTING
+#include <cmocka.h>
+
+#include <isc/crc64.h>
+#include <isc/print.h>
+#include <isc/result.h>
+#include <isc/util.h>
+
+#include <tests/isc.h>
+
+#define TEST_INPUT(x) (x), sizeof(x) - 1
+
+ISC_RUN_TEST_IMPL(isc_crc64_init) {
+	uint64_t crc;
+
+	isc_crc64_init(&crc);
+	assert_int_equal(crc, 0xffffffffffffffffUL);
+}
+
+static void
+_crc64(const char *buf, size_t buflen, const char *result, const int repeats) {
+	uint64_t crc;
+
+	isc_crc64_init(&crc);
+	assert_int_equal(crc, 0xffffffffffffffffUL);
+
+	for (int i = 0; i < repeats; i++) {
+		isc_crc64_update(&crc, buf, buflen);
+	}
+
+	isc_crc64_final(&crc);
+
+	char hex[16 + 1];
+	snprintf(hex, sizeof(hex), "%016" PRIX64, crc);
+
+	assert_memory_equal(hex, result, (result ? strlen(result) : 0));
+}
+
+/* 64-bit cyclic redundancy check */
+ISC_RUN_TEST_IMPL(isc_crc64) {
+	_crc64(TEST_INPUT(""), "0000000000000000", 1);
+	_crc64(TEST_INPUT("a"), "CE73F427ACC0A99A", 1);
+	_crc64(TEST_INPUT("abc"), "048B813AF9F49702", 1);
+	_crc64(TEST_INPUT("message digest"), "5273F9EA7A357BF4", 1);
+	_crc64(TEST_INPUT("abcdefghijklmnopqrstuvwxyz"), "59F079F9218BAAA1", 1);
+	_crc64(TEST_INPUT("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklm"
+			  "nopqrstuvwxyz0123456789"),
+	       "A36DA8F71E78B6FB", 1);
+	_crc64(TEST_INPUT("123456789012345678901234567890123456789"
+			  "01234567890123456789012345678901234567890"),
+	       "81E5EB73C8E7874A", 1);
+}
+
+ISC_TEST_LIST_START
+
+ISC_TEST_ENTRY(isc_crc64_init)
+ISC_TEST_ENTRY(isc_crc64)
+
+ISC_TEST_LIST_END
+
+ISC_TEST_MAIN