ec: add crc32_ctx..() to take context parameter.

Add crc32_ctx.. functions to take context parameter.

This allows for multiple instances to exist in parallel.

Signed-off-by: mschilder@google.com
TEST=make buildall -j8 succeeds
BRANCH=none
BUG=b:73832883

Change-Id: I66bbc56377eeebf01c790caad0bc4c7a51a1bc58
Reviewed-on: https://chromium-review.googlesource.com/935825
Commit-Ready: Marius Schilder <mschilder@chromium.org>
Tested-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/test/crc32.c b/test/crc32.c
new file mode 100644
index 0000000000..e3f6f8d5c6
--- /dev/null
+++ b/test/crc32.c
@@ -0,0 +1,75 @@
+/* Copyright 2016 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Tests crc32 sw implementation.
+ */
+
+#include "common.h"
+#include "console.h"
+#include "crc.h"
+#include "test_util.h"
+#include "util.h"
+
+// test that static version matches context version
+static int test_static(void)
+{
+	uint32_t crc;
+	const uint32_t input = 0xdeadbeef;
+
+	crc32_init();
+	crc32_hash32(input);
+
+	crc32_ctx_init(&crc);
+	crc32_ctx_hash32(&crc, input);
+
+	TEST_ASSERT(crc32_result() == crc32_ctx_result(&crc));
+
+	return EC_SUCCESS;
+}
+
+// test that context bytes at a time matches static word at time
+static int test_8(void)
+{
+	uint32_t crc;
+	const uint32_t input = 0xdeadbeef;
+	const uint8_t *p = (const uint8_t *) &input;
+	int i;
+
+	crc32_init();
+	crc32_hash32(input);
+
+	crc32_ctx_init(&crc);
+	for (i = 0; i < sizeof(input); ++i)
+		crc32_ctx_hash8(&crc, p[i]);
+
+	TEST_ASSERT(crc32_result() == crc32_ctx_result(&crc));
+
+	return EC_SUCCESS;
+}
+
+// http://www.febooti.com/products/filetweak/members/hash-and-crc/test-vectors/
+static int test_kat0(void)
+{
+	uint32_t crc;
+	int i;
+	const char input[] = "The quick brown fox jumps over the lazy dog";
+
+	crc32_ctx_init(&crc);
+	for (i = 0; i < strlen(input); ++i)
+		crc32_ctx_hash8(&crc, input[i]);
+	TEST_ASSERT(crc32_ctx_result(&crc) == 0x414fa339);
+
+	return EC_SUCCESS;
+}
+
+void run_test(void)
+{
+	test_reset();
+
+	RUN_TEST(test_static);
+	RUN_TEST(test_8);
+	RUN_TEST(test_kat0);
+
+	test_print_result();
+}