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// 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.
#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 {
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;
// 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_;
} // namespace device