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/*############################################################################
# Copyright 2017 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
############################################################################*/
/// TPM GetRandom unit tests.
/*! \file */
#include <vector>
#include "epid/common-testhelper/epid_gtest-testhelper.h"
#include "gtest/gtest.h"
#include "epid/common-testhelper/epid2params_wrapper-testhelper.h"
#include "epid/common-testhelper/prng-testhelper.h"
#include "epid/member/tpm2/unittests/tpm2-testhelper.h"
extern "C" {
#include "epid/member/tpm2/context.h"
#include "epid/member/tpm2/getrandom.h"
}
namespace {
//////////////////////////////////////////////////////////////////////////
// Tpm2GetRandom Tests
TEST_F(EpidTpm2Test, GetRandomFailsGivenNullParameters) {
uint8_t output[48] = {0};
Prng my_prng;
my_prng.set_seed(0x1234);
Epid2ParamsObj epid2params;
Tpm2CtxObj tpm(&Prng::Generate, &my_prng, nullptr, epid2params);
EXPECT_EQ(kEpidBadArgErr, Tpm2GetRandom(nullptr, 48 * 8, output));
EXPECT_EQ(kEpidBadArgErr, Tpm2GetRandom(tpm, 48 * 8, nullptr));
}
TEST_F(EpidTpm2Test, GetRandomReturnsDifferentBufs) {
Prng my_prng;
Epid2ParamsObj epid2params;
Tpm2CtxObj tpm(&Prng::Generate, &my_prng, nullptr, epid2params);
int length = 10;
std::vector<uint8_t> buf1(length, (uint8_t)0);
std::vector<uint8_t> buf2(length, (uint8_t)0);
EXPECT_EQ(kEpidNoErr, Tpm2GetRandom(tpm, length * CHAR_BIT, buf1.data()));
EXPECT_EQ(kEpidNoErr, Tpm2GetRandom(tpm, length * CHAR_BIT, buf2.data()));
EXPECT_NE(buf1, buf2);
}
TEST_F(EpidTpm2Test, GetRandomCanGenerateLongStream) {
Prng my_prng;
Epid2ParamsObj epid2params;
Tpm2CtxObj tpm(&Prng::Generate, &my_prng, nullptr, epid2params);
int length = 1000;
std::vector<uint8_t> zeros(length, (uint8_t)0);
std::vector<uint8_t> buf = zeros;
EXPECT_EQ(kEpidNoErr, Tpm2GetRandom(tpm, length * CHAR_BIT, buf.data()));
EXPECT_NE(buf, zeros);
}
} // namespace
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