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-rw-r--r--tests/sys/devrandom/uint128_test.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/tests/sys/devrandom/uint128_test.c b/tests/sys/devrandom/uint128_test.c
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index 000000000000..a59adba1a7c7
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+++ b/tests/sys/devrandom/uint128_test.c
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+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/random.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <crypto/chacha20/chacha.h>
+#include <crypto/rijndael/rijndael-api-fst.h>
+#include <crypto/sha2/sha256.h>
+
+#include <dev/random/hash.h>
+#include <dev/random/uint128.h>
+
+#include <atf-c.h>
+
+static void
+vec_u32_tole128(uint8_t dst[static 16], const uint32_t src[static 4])
+{
+ le32enc(dst, src[0]);
+ le32enc(&dst[4], src[1]);
+ le32enc(&dst[8], src[2]);
+ le32enc(&dst[12], src[3]);
+}
+
+static void
+le128_to_vec_u32(uint32_t dst[static 4], const uint8_t src[static 16])
+{
+ dst[0] = le32dec(src);
+ dst[1] = le32dec(&src[4]);
+ dst[2] = le32dec(&src[8]);
+ dst[3] = le32dec(&src[12]);
+}
+
+static void
+formatu128(char buf[static 52], uint128_t x)
+{
+ uint8_t le128x[16];
+ uint32_t vx[4];
+ size_t sz, i;
+ int rc;
+
+ le128enc(le128x, x);
+ le128_to_vec_u32(vx, le128x);
+
+ sz = 52;
+ for (i = 0; i < 4; i++) {
+ rc = snprintf(buf, sz, "0x%x ", vx[i]);
+ ATF_REQUIRE(rc > 0 && (size_t)rc < sz);
+
+ buf += rc;
+ sz -= rc;
+ }
+ /* Delete last trailing space */
+ buf[-1] = '\0';
+}
+
+static void
+u128_check_equality(uint128_t a, uint128_t b, const char *descr)
+{
+ char fmtbufa[52], fmtbufb[52];
+
+ formatu128(fmtbufa, a);
+ formatu128(fmtbufb, b);
+
+ ATF_CHECK_MSG(uint128_equals(a, b),
+ "Expected: [%s] != Actual: [%s]: %s", fmtbufa, fmtbufb, descr);
+}
+
+ATF_TC_WITHOUT_HEAD(uint128_inc);
+ATF_TC_BODY(uint128_inc, tc)
+{
+ static const struct u128_inc_tc {
+ uint32_t input[4];
+ uint32_t expected[4];
+ const char *descr;
+ } tests[] = {
+ {
+ .input = { 0, 0, 0, 0 },
+ .expected = { 1, 0, 0, 0 },
+ .descr = "0 -> 1",
+ },
+ {
+ .input = { 1, 0, 0, 0 },
+ .expected = { 2, 0, 0, 0 },
+ .descr = "0 -> 2",
+ },
+ {
+ .input = { 0xff, 0, 0, 0 },
+ .expected = { 0x100, 0, 0, 0 },
+ .descr = "0xff -> 0x100 (byte carry)",
+ },
+ {
+ .input = { UINT32_MAX, 0, 0, 0 },
+ .expected = { 0, 1, 0, 0 },
+ .descr = "2^32 - 1 -> 2^32 (word carry)",
+ },
+ {
+ .input = { UINT32_MAX, UINT32_MAX, 0, 0 },
+ .expected = { 0, 0, 1, 0 },
+ .descr = "2^64 - 1 -> 2^64 (u128t_word0 carry)",
+ },
+ {
+ .input = { UINT32_MAX, UINT32_MAX, UINT32_MAX, 0 },
+ .expected = { 0, 0, 0, 1 },
+ .descr = "2^96 - 1 -> 2^96 (word carry)",
+ },
+ };
+ uint8_t inputle[16], expectedle[16];
+ uint128_t a;
+ size_t i;
+
+ for (i = 0; i < nitems(tests); i++) {
+ vec_u32_tole128(inputle, tests[i].input);
+ vec_u32_tole128(expectedle, tests[i].expected);
+
+ a = le128dec(inputle);
+ uint128_increment(&a);
+ u128_check_equality(le128dec(expectedle), a, tests[i].descr);
+ }
+}
+
+ATF_TC_WITHOUT_HEAD(uint128_add64);
+ATF_TC_BODY(uint128_add64, tc)
+{
+ static const struct u128_add64_tc {
+ uint32_t input[4];
+ uint64_t addend;
+ uint32_t expected[4];
+ const char *descr;
+ } tests[] = {
+ {
+ .input = { 0, 0, 0, 0 },
+ .addend = 1,
+ .expected = { 1, 0, 0, 0 },
+ .descr = "0 + 1 -> 1",
+ },
+ {
+ .input = { 1, 0, 0, 0 },
+ .addend = UINT32_MAX,
+ .expected = { 0, 1, 0, 0 },
+ .descr = "1 + (2^32 - 1) -> 2^32 (word carry)",
+ },
+ {
+ .input = { 1, 0, 0, 0 },
+ .addend = UINT64_MAX,
+ .expected = { 0, 0, 1, 0 },
+ .descr = "1 + (2^64 - 1) -> 2^64 (u128t_word0 carry)",
+ },
+ {
+ .input = { 0x11111111, 0x11111111, 0, 0 },
+ .addend = 0xf0123456789abcdeULL,
+ .expected = { 0x89abcdef, 0x01234567, 1, 0 },
+ .descr = "0x1111_1111_1111_1111 +"
+ "0xf012_3456_789a_bcde ->"
+ "0x1_0123_4567_89ab_cdef",
+ },
+ {
+ .input = { 1, 0, UINT32_MAX, 0 },
+ .addend = UINT64_MAX,
+ .expected = { 0, 0, 0, 1 },
+ .descr = "Carry ~2^96",
+ },
+ };
+ uint8_t inputle[16], expectedle[16];
+ uint128_t a;
+ size_t i;
+
+ for (i = 0; i < nitems(tests); i++) {
+ vec_u32_tole128(inputle, tests[i].input);
+ vec_u32_tole128(expectedle, tests[i].expected);
+
+ a = le128dec(inputle);
+ uint128_add64(&a, tests[i].addend);
+ u128_check_equality(le128dec(expectedle), a, tests[i].descr);
+ }
+}
+
+/*
+ * Test assumptions about Chacha incrementing counter in the same way as
+ * uint128.h
+ */
+ATF_TC_WITHOUT_HEAD(uint128_chacha_ctr);
+ATF_TC_BODY(uint128_chacha_ctr, tc)
+{
+ static const struct u128_chacha_tc {
+ uint32_t input[4];
+ uint32_t expected[4];
+ const char *descr;
+ } tests[] = {
+ {
+ .input = { 0, 0, 0, 0 },
+ .expected = { 1, 0, 0, 0 },
+ .descr = "Single block",
+ },
+ {
+ .input = { 1, 0, 0, 0 },
+ .expected = { 2, 0, 0, 0 },
+ .descr = "0 -> 2",
+ },
+ {
+ .input = { 0xff, 0, 0, 0 },
+ .expected = { 0x100, 0, 0, 0 },
+ .descr = "0xff -> 0x100 (byte carry)",
+ },
+ {
+ .input = { UINT32_MAX, 0, 0, 0 },
+ .expected = { 0, 1, 0, 0 },
+ .descr = "2^32 - 1 -> 2^32 (word carry)",
+ },
+ {
+ .input = { UINT32_MAX, UINT32_MAX, 0, 0 },
+ .expected = { 0, 0, 1, 0 },
+ .descr = "2^64 - 1 -> 2^64 (u128t_word0 carry)",
+ },
+ {
+ .input = { UINT32_MAX, UINT32_MAX, UINT32_MAX, 0 },
+ .expected = { 0, 0, 0, 1 },
+ .descr = "2^96 - 1 -> 2^96 (word carry)",
+ },
+ };
+ union randomdev_key context;
+ uint8_t inputle[16], expectedle[16], trash[CHACHA_BLOCKLEN];
+ uint8_t notrandomkey[RANDOM_KEYSIZE] = { 0 };
+ uint128_t a;
+ size_t i;
+
+ random_chachamode = true;
+ randomdev_encrypt_init(&context, notrandomkey);
+
+ for (i = 0; i < nitems(tests); i++) {
+ vec_u32_tole128(inputle, tests[i].input);
+ vec_u32_tole128(expectedle, tests[i].expected);
+
+ a = le128dec(inputle);
+ randomdev_keystream(&context, &a, trash, sizeof(trash));
+ u128_check_equality(le128dec(expectedle), a, tests[i].descr);
+ }
+
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, uint128_inc);
+ ATF_TP_ADD_TC(tp, uint128_add64);
+ ATF_TP_ADD_TC(tp, uint128_chacha_ctr);
+ return (atf_no_error());
+}
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