| // Copyright 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef DEVICE_FIDO_EC_PUBLIC_KEY_H_ |
| #define DEVICE_FIDO_EC_PUBLIC_KEY_H_ |
| |
| #include <stdint.h> |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/component_export.h" |
| #include "base/containers/span.h" |
| #include "base/macros.h" |
| #include "device/fido/public_key.h" |
| |
| namespace device { |
| |
| // An uncompressed ECPublicKey consisting of 64 bytes: |
| // - the 32-byte x coordinate |
| // - the 32-byte y coordinate. |
| class COMPONENT_EXPORT(DEVICE_FIDO) ECPublicKey : public PublicKey { |
| public: |
| static std::unique_ptr<ECPublicKey> ExtractFromU2fRegistrationResponse( |
| std::string algorithm, |
| base::span<const uint8_t> u2f_data); |
| |
| // Parse a public key encoded in ANSI X9.62 uncompressed format. |
| static std::unique_ptr<ECPublicKey> ParseX962Uncompressed( |
| std::string algorithm, |
| base::span<const uint8_t> input); |
| |
| ECPublicKey(std::string algorithm, |
| std::vector<uint8_t> x, |
| std::vector<uint8_t> y); |
| |
| ~ECPublicKey() override; |
| |
| // Produces a key in COSE_key format, which is an integer-keyed CBOR map: |
| // { 1 ("kty") : 2 (the EC2 key id), |
| // 3 ("alg") : -7 (the ES256 COSEAlgorithmIdentifier), |
| // -1 ("crv"): 1 (the P-256 EC identifier), |
| // -2: x-coordinate, |
| // -3: y-coordinate } |
| std::vector<uint8_t> EncodeAsCOSEKey() const override; |
| |
| private: |
| // Note that these values might not be minimal and might not be on the curve. |
| const std::vector<uint8_t> x_coordinate_; |
| const std::vector<uint8_t> y_coordinate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ECPublicKey); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_FIDO_EC_PUBLIC_KEY_H_ |