| // 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_U2F_AUTHENTICATOR_DATA_H_ |
| #define DEVICE_U2F_AUTHENTICATOR_DATA_H_ |
| |
| #include <stdint.h> |
| #include <string> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/optional.h" |
| #include "device/u2f/attested_credential_data.h" |
| |
| namespace device { |
| |
| // https://www.w3.org/TR/2017/WD-webauthn-20170505/#sec-authenticator-data. |
| class AuthenticatorData { |
| public: |
| enum class Flag : uint8_t { |
| kTestOfUserPresence = 1u << 0, |
| kAttestation = 1u << 6 |
| }; |
| |
| AuthenticatorData(std::string relying_party_id, |
| uint8_t flags, |
| std::vector<uint8_t> counter, |
| base::Optional<AttestedCredentialData> data); |
| |
| // Moveable. |
| AuthenticatorData(AuthenticatorData&& other); |
| AuthenticatorData& operator=(AuthenticatorData&& other); |
| |
| ~AuthenticatorData(); |
| |
| // Produces a byte array consisting of: |
| // * hash(relying_party_id) |
| // * flags |
| // * counter |
| // * attestation_data. |
| std::vector<uint8_t> SerializeToByteArray() const; |
| |
| private: |
| // RP ID associated with the credential |
| std::string relying_party_id_; |
| |
| // Flags (bit 0 is the least significant bit): |
| // [ED | AT | RFU | RFU | RFU | RFU | RFU | UP ] |
| // * Bit 0: Test of User Presence (TUP) result. |
| // * Bits 1-5: Reserved for future use (RFU). |
| // * Bit 6: Attestation data included (AT). |
| // * Bit 7: Extension data included (ED). |
| uint8_t flags_; |
| |
| // Signature counter, 32-bit unsigned big-endian integer. |
| std::vector<uint8_t> counter_; |
| base::Optional<AttestedCredentialData> attested_data_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AuthenticatorData); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_U2F_AUTHENTICATOR_DATA_H_ |