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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2026
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/ByteFlow.h"
#include "td/utils/common.h"
#include "td/utils/crypto.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include "td/utils/UInt.h"
namespace td {
#if TD_HAVE_OPENSSL
class AesCtrByteFlow final : public ByteFlowInplaceBase {
public:
void init(const UInt256 &key, const UInt128 &iv) {
state_.init(as_slice(key), as_slice(iv));
}
void init(AesCtrState &&state) {
state_ = std::move(state);
}
AesCtrState move_aes_ctr_state() {
return std::move(state_);
}
bool loop() final {
bool result = false;
auto ready = input_->prepare_read();
if (!ready.empty()) {
state_.encrypt(ready, MutableSlice(const_cast<char *>(ready.data()), ready.size()));
input_->confirm_read(ready.size());
output_.advance_end(ready.size());
result = true;
}
if (!is_input_active_) {
finish(Status::OK()); // End of input stream.
}
return result;
}
private:
AesCtrState state_;
};
#endif
} // namespace td
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