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// 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 http://mozilla.org/MPL/2.0/.
#include "gcm-vectors.h"
#include "gtest/gtest.h"
#include "util.h"
#include "gcm.h"
namespace nss_test {
class GHashTest : public ::testing::TestWithParam<gcm_kat_value> {
protected:
void TestGHash(const gcm_kat_value val, bool sw) {
// Read test data.
std::vector<uint8_t> hash_key = hex_string_to_bytes(val.hash_key);
ASSERT_EQ(16UL, hash_key.size());
std::vector<uint8_t> additional_data =
hex_string_to_bytes(val.additional_data);
std::vector<uint8_t> result = hex_string_to_bytes(val.result);
std::vector<uint8_t> cipher_text(result.begin(), result.end() - 16);
std::vector<uint8_t> expected = hex_string_to_bytes(val.ghash);
ASSERT_EQ(16UL, expected.size());
// Prepare context.
gcmHashContext ghashCtx;
ASSERT_EQ(SECSuccess, gcmHash_InitContext(&ghashCtx, hash_key.data(), sw));
// Hash additional_data, cipher_text.
gcmHash_Reset(&ghashCtx,
const_cast<const unsigned char *>(additional_data.data()),
additional_data.size());
gcmHash_Update(&ghashCtx,
const_cast<const unsigned char *>(cipher_text.data()),
cipher_text.size());
// Finalise (hash in the length).
uint8_t result_bytes[16];
unsigned int out_len;
ASSERT_EQ(SECSuccess, gcmHash_Final(&ghashCtx, result_bytes, &out_len, 16));
ASSERT_EQ(16U, out_len);
EXPECT_EQ(expected, std::vector<uint8_t>(result_bytes, result_bytes + 16));
}
};
#ifdef NSS_X86_OR_X64
TEST_P(GHashTest, KAT_X86_HW) { TestGHash(GetParam(), false); }
#endif
TEST_P(GHashTest, KAT_Sftw) { TestGHash(GetParam(), true); }
INSTANTIATE_TEST_CASE_P(NISTTestVector, GHashTest,
::testing::ValuesIn(kGcmKatValues));
} // nss_test
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