56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/utils/ByteFlow.h"
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#include "td/utils/common.h"
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#include "td/utils/crypto.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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namespace td {
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#if TD_HAVE_OPENSSL
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class AesCtrByteFlow : public ByteFlowInplaceBase {
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public:
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void init(const UInt256 &key, const UInt128 &iv) {
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state_.init(key, iv);
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}
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void init(AesCtrState &&state) {
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state_ = std::move(state);
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}
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AesCtrState move_aes_ctr_state() {
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return std::move(state_);
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}
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void loop() override {
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bool was_updated = false;
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while (true) {
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auto ready = input_->prepare_read();
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if (ready.empty()) {
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break;
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}
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state_.encrypt(ready, MutableSlice(const_cast<char *>(ready.data()), ready.size()));
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input_->confirm_read(ready.size());
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output_.advance_end(ready.size());
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was_updated = true;
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}
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if (was_updated) {
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on_output_updated();
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}
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if (!is_input_active_) {
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finish(Status::OK()); // End of input stream.
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}
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set_need_size(1);
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}
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private:
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AesCtrState state_;
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};
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#endif
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} // namespace td
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