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// Copyright 2021 Google LLC
//
// 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.
//
///////////////////////////////////////////////////////////////////////////////
#include "tink/config/tink_fips.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/status/status.h"
#include "openssl/crypto.h"
#include "tink/aead/aead_config.h"
#include "tink/internal/fips_utils.h"
#include "tink/registry.h"
#include "tink/util/status.h"
#include "tink/util/test_matchers.h"
namespace crypto {
namespace tink {
namespace {
using testing::Eq;
using ::crypto::tink::test::IsOk;
using ::crypto::tink::test::StatusIs;
class FipsIncompatible {
public:
static constexpr crypto::tink::internal::FipsCompatibility kFipsStatus =
crypto::tink::internal::FipsCompatibility::kNotFips;
};
class FipsCompatibleWithBoringCrypto {
public:
static constexpr crypto::tink::internal::FipsCompatibility kFipsStatus =
crypto::tink::internal::FipsCompatibility::kRequiresBoringCrypto;
};
TEST(TinkFipsTest, FipsEnabledWhenBuiltInFipsMode) {
// Check if the built flag is set.
if (!internal::kUseOnlyFips) {
GTEST_SKIP() << "Only supported in FIPS-only mode";
}
EXPECT_THAT(IsFipsModeEnabled(), Eq(true));
}
TEST(TinkFipsTest, FipsDisabledWhenNotBuildInFipsMode) {
// Check if the built flag is set.
if (internal::kUseOnlyFips) {
GTEST_SKIP() << "Not supported in FIPS-only mode";
}
EXPECT_THAT(IsFipsModeEnabled(), Eq(false));
}
TEST(TinkFipsTest, CompatibilityChecksWithBoringCrypto) {
if (!internal::IsFipsEnabledInSsl()) {
GTEST_SKIP() << "Test only run if BoringCrypto module is available.";
}
Registry::Reset();
// Tink is not build in FIPS mode, but the FIPS mode is enabled at runtime.
EXPECT_THAT(crypto::tink::RestrictToFips(), IsOk());
// In FIPS only mode compatibility checks should disallow algorithms
// with the FipsCompatibility::kNone flag.
EXPECT_THAT(internal::CheckFipsCompatibility<FipsIncompatible>(),
StatusIs(absl::StatusCode::kInternal));
// FIPS validated implementations should still be allowed.
EXPECT_THAT(
internal::CheckFipsCompatibility<FipsCompatibleWithBoringCrypto>(),
IsOk());
internal::UnSetFipsRestricted();
}
TEST(TinkFipsTest, CompatibilityChecksWithoutBoringCrypto) {
if (internal::IsFipsEnabledInSsl()) {
GTEST_SKIP() << "Test only run if BoringCrypto module is not available.";
}
Registry::Reset();
// Tink is not build in FIPS mode, but the FIPS mode is enabled at runtime.
EXPECT_THAT(crypto::tink::RestrictToFips(), IsOk());
// In FIPS only mode compatibility checks should disallow algorithms
// with the FipsCompatibility::kNone flag.
EXPECT_THAT(internal::CheckFipsCompatibility<FipsIncompatible>(),
StatusIs(absl::StatusCode::kInternal));
// FIPS validated implementations are not allowed if BoringCrypto is not
// available.
EXPECT_THAT(
internal::CheckFipsCompatibility<FipsCompatibleWithBoringCrypto>(),
StatusIs(absl::StatusCode::kInternal));
internal::UnSetFipsRestricted();
}
TEST(TinkFipsTest, FailIfRegistryNotEmpty) {
if (internal::kUseOnlyFips) {
GTEST_SKIP() << "Not supported in FIPS-only mode";
}
Registry::Reset();
internal::UnSetFipsRestricted();
EXPECT_THAT(AeadConfig::Register(), IsOk());
EXPECT_THAT(crypto::tink::RestrictToFips(),
StatusIs(absl::StatusCode::kInternal));
}
} // namespace
} // namespace tink
} // namespace crypto
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