| // 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/common_enums.h" |
| #include "tink/subtle/ec_util.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/test_util.h" |
| #include "gtest/gtest.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| namespace { |
| |
| TEST(EcUtilTest, testFieldSizeInBytes) { |
| EXPECT_EQ(256/8, EcUtil::FieldSizeInBytes(EllipticCurveType::NIST_P256)); |
| EXPECT_EQ(384/8, EcUtil::FieldSizeInBytes(EllipticCurveType::NIST_P384)); |
| EXPECT_EQ((521 + 7)/8, |
| EcUtil::FieldSizeInBytes(EllipticCurveType::NIST_P521)); |
| EXPECT_EQ((256) / 8, EcUtil::FieldSizeInBytes(EllipticCurveType::CURVE25519)); |
| |
| EXPECT_EQ(0, EcUtil::FieldSizeInBytes(EllipticCurveType::UNKNOWN_CURVE)); |
| } |
| |
| TEST(EcUtilTest, testEncodingSizeInBytes) { |
| EXPECT_EQ(2 * (256/8) + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P256, |
| EcPointFormat::UNCOMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ(256/8 + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P256, |
| EcPointFormat::COMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ(2 * (384/8) + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P384, |
| EcPointFormat::UNCOMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ(384/8 + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P384, |
| EcPointFormat::COMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ(2 * ((521 + 7)/8) + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P521, |
| EcPointFormat::UNCOMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ((521 + 7)/8 + 1, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P521, |
| EcPointFormat::COMPRESSED) |
| .ValueOrDie()); |
| EXPECT_EQ((256) / 8, |
| EcUtil::EncodingSizeInBytes(EllipticCurveType::CURVE25519, |
| EcPointFormat::COMPRESSED) |
| .ValueOrDie()); |
| |
| EXPECT_FALSE(EcUtil::EncodingSizeInBytes(EllipticCurveType::NIST_P256, |
| EcPointFormat::UNKNOWN_FORMAT).ok()); |
| } |
| |
| } // namespace |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |