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// Copyright 2017 Google Inc.
//
// 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/subtle/ecdsa_sign_boringssl.h"
#include <string>
#include "gtest/gtest.h"
#include "tink/public_key_sign.h"
#include "tink/public_key_verify.h"
#include "tink/subtle/common_enums.h"
#include "tink/subtle/ec_util.h"
#include "tink/subtle/ecdsa_verify_boringssl.h"
#include "tink/subtle/subtle_util_boringssl.h"
#include "tink/util/status.h"
#include "tink/util/statusor.h"
#include "tink/util/test_util.h"
namespace crypto {
namespace tink {
namespace subtle {
namespace {
class EcdsaSignBoringSslTest : public ::testing::Test {
};
TEST_F(EcdsaSignBoringSslTest, testBasicSigning) {
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subtle::EcdsaSignatureEncoding encodings[2] = {
EcdsaSignatureEncoding::DER, EcdsaSignatureEncoding::IEEE_P1363};
for (EcdsaSignatureEncoding encoding : encodings) {
auto ec_key = SubtleUtilBoringSSL::GetNewEcKey(EllipticCurveType::NIST_P256)
.ValueOrDie();
auto signer_result =
EcdsaSignBoringSsl::New(ec_key, HashType::SHA256, encoding);
ASSERT_TRUE(signer_result.ok()) << signer_result.status();
auto signer = std::move(signer_result.ValueOrDie());
auto verifier_result =
EcdsaVerifyBoringSsl::New(ec_key, HashType::SHA256, encoding);
ASSERT_TRUE(verifier_result.ok()) << verifier_result.status();
auto verifier = std::move(verifier_result.ValueOrDie());
std::string message = "some data to be signed";
std::string signature = signer->Sign(message).ValueOrDie();
EXPECT_NE(signature, message);
auto status = verifier->Verify(signature, message);
EXPECT_TRUE(status.ok()) << status;
status = verifier->Verify("some bad signature", message);
EXPECT_FALSE(status.ok());
status = verifier->Verify(signature, "some bad message");
EXPECT_FALSE(status.ok());
// Message is a null string_view.
const absl::string_view empty_message;
signature = signer->Sign(empty_message).ValueOrDie();
EXPECT_NE(signature, empty_message);
status = verifier->Verify(signature, empty_message);
EXPECT_TRUE(status.ok()) << status;
}
}
TEST_F(EcdsaSignBoringSslTest, testEncodingsMismatch) {
subtle::EcdsaSignatureEncoding encodings[2] = {
EcdsaSignatureEncoding::DER, EcdsaSignatureEncoding::IEEE_P1363};
for (EcdsaSignatureEncoding encoding : encodings) {
auto ec_key = SubtleUtilBoringSSL::GetNewEcKey(EllipticCurveType::NIST_P256)
.ValueOrDie();
auto signer_result =
EcdsaSignBoringSsl::New(ec_key, HashType::SHA256, encoding);
ASSERT_TRUE(signer_result.ok()) << signer_result.status();
auto signer = std::move(signer_result.ValueOrDie());
auto verifier_result =
EcdsaVerifyBoringSsl::New(ec_key, HashType::SHA256,
encoding == EcdsaSignatureEncoding::DER
? EcdsaSignatureEncoding::IEEE_P1363
: EcdsaSignatureEncoding::DER);
ASSERT_TRUE(verifier_result.ok()) << verifier_result.status();
auto verifier = std::move(verifier_result.ValueOrDie());
std::string message = "some data to be signed";
std::string signature = signer->Sign(message).ValueOrDie();
EXPECT_NE(signature, message);
auto status = verifier->Verify(signature, message);
EXPECT_FALSE(status.ok()) << status;
}
}
TEST_F(EcdsaSignBoringSslTest, testSignatureSizesWithIEEE_P1364Encoding) {
EllipticCurveType curves[3] = {EllipticCurveType::NIST_P256,
EllipticCurveType::NIST_P384,
EllipticCurveType::NIST_P521};
for (EllipticCurveType curve : curves) {
auto ec_key = SubtleUtilBoringSSL::GetNewEcKey(curve).ValueOrDie();
auto signer_result = EcdsaSignBoringSsl::New(
ec_key, HashType::SHA256, EcdsaSignatureEncoding::IEEE_P1363);
ASSERT_TRUE(signer_result.ok()) << signer_result.status();
auto signer = std::move(signer_result.ValueOrDie());
auto verifier_result = EcdsaVerifyBoringSsl::New(
ec_key, HashType::SHA256, EcdsaSignatureEncoding::IEEE_P1363);
ASSERT_TRUE(verifier_result.ok()) << verifier_result.status();
auto verifier = std::move(verifier_result.ValueOrDie());
std::string message = "some data to be signed";
std::string signature = signer->Sign(message).ValueOrDie();
EXPECT_NE(signature, message);
auto status = verifier->Verify(signature, message);
EXPECT_TRUE(status.ok()) << status;
// Check signature size.
auto field_size_in_bytes = EcUtil::FieldSizeInBytes(curve);
EXPECT_EQ(2 * field_size_in_bytes, signature.size());
}
TEST_F(EcdsaSignBoringSslTest, testNewErrors) {
auto ec_key = SubtleUtilBoringSSL::GetNewEcKey(EllipticCurveType::NIST_P256)
.ValueOrDie();
auto signer_result = EcdsaSignBoringSsl::New(ec_key, HashType::SHA1,
EcdsaSignatureEncoding::DER);
EXPECT_FALSE(signer_result.ok()) << signer_result.status();
}
// TODO(bleichen): add Wycheproof tests.
} // namespace
} // namespace subtle
} // namespace tink
} // namespace crypto