tree-wide: beautify remaining copyright statements

[thirdparty/systemd.git] / src / test / test-siphash24.c

diff --git a/src/test/test-siphash24.c b/src/test/test-siphash24.c
index c20be993507b5d6bd0dde4d54725b707e41ed6e4..e340388d8d46c6fd05a1871ddc1b30839509ac45 100644 (file)
--- a/src/test/test-siphash24.c
+++ b/src/test/test-siphash24.c
@@ -1,22 +1,6 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
-  This file is part of systemd.
-
-  Copyright 2015 Tom Gundersen
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+  Copyright © 2015 Tom Gundersen
 ***/
 
 #include "siphash24.h"
@@ -24,9 +8,9 @@
 
 #define ITERATIONS 10000000ULL
 
-static int do_test(const uint8_t *in, size_t len, const uint8_t *key) {
+static void do_test(const uint8_t *in, size_t len, const uint8_t *key) {
         struct siphash state = {};
-        uint64_t out = 0;
+        uint64_t out;
         unsigned i, j;
 
         out = siphash24(in, len, key);
@@ -62,7 +46,46 @@ static int do_test(const uint8_t *in, size_t len, const uint8_t *key) {
                         assert_se(out == 0xa129ca6149be45e5);
                 }
         }
-        return 0;
+}
+
+static void test_short_hashes(void) {
+        const uint8_t one[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+                                0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16 };
+        const uint8_t  key[16] = { 0x22, 0x24, 0x41, 0x22, 0x55, 0x77, 0x88, 0x07,
+                                   0x23, 0x09, 0x23, 0x14, 0x0c, 0x33, 0x0e, 0x0f};
+        uint8_t two[sizeof one] = {};
+
+        struct siphash state1 = {}, state2 = {};
+        unsigned i, j;
+
+        siphash24_init(&state1, key);
+        siphash24_init(&state2, key);
+
+        /* hashing 1, 2, 3, 4, 5, ..., 16 bytes, with the byte after the buffer different */
+        for (i = 1; i <= sizeof one; i++) {
+                siphash24_compress(one, i, &state1);
+
+                two[i-1] = one[i-1];
+                siphash24_compress(two, i, &state2);
+
+                assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
+        }
+
+        /* hashing n and 1, n and 2, n and 3, ..., n-1 and 1, n-2 and 2, ... */
+        for (i = sizeof one; i > 0; i--) {
+                zero(two);
+
+                for (j = 1; j <= sizeof one; j++) {
+                        siphash24_compress(one, i, &state1);
+                        siphash24_compress(one, j, &state1);
+
+                        siphash24_compress(one, i, &state2);
+                        two[j-1] = one[j-1];
+                        siphash24_compress(two, j, &state2);
+
+                        assert_se(memcmp(&state1, &state2, sizeof state1) == 0);
+                }
+        }
 }
 
 /* see https://131002.net/siphash/siphash.pdf, Appendix A */
@@ -82,4 +105,6 @@ int main(int argc, char *argv[]) {
         do_test(in_buf + 2, sizeof(in), key);
         memcpy(in_buf + 4, in, sizeof(in));
         do_test(in_buf + 4, sizeof(in), key);
+
+        test_short_hashes();
 }