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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 "components/apdu/apdu_response.h"
- #include <utility>
- #include "base/numerics/safe_conversions.h"
- namespace apdu {
- // static
- absl::optional<ApduResponse> ApduResponse::CreateFromMessage(
- base::span<const uint8_t> data) {
- // Invalid message size, data is appended by status byte.
- if (data.size() < 2)
- return absl::nullopt;
- uint16_t status_bytes = data[data.size() - 2] << 8;
- status_bytes |= data[data.size() - 1];
- return ApduResponse(std::vector<uint8_t>(data.begin(), data.end() - 2),
- static_cast<Status>(status_bytes));
- }
- ApduResponse::ApduResponse(std::vector<uint8_t> data, Status response_status)
- : data_(std::move(data)), response_status_(response_status) {}
- ApduResponse::ApduResponse(ApduResponse&& that) = default;
- ApduResponse& ApduResponse::operator=(ApduResponse&& that) = default;
- ApduResponse::~ApduResponse() = default;
- std::vector<uint8_t> ApduResponse::GetEncodedResponse() const {
- std::vector<uint8_t> encoded_response = data_;
- encoded_response.push_back(
- base::strict_cast<uint16_t>(response_status_) >> 8 & 0xff);
- encoded_response.push_back(base::strict_cast<uint16_t>(response_status_) &
- 0xff);
- return encoded_response;
- }
- } // namespace apdu
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