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65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
#pragma once
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#include "api_frame_helper.h"
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#ifdef USE_API
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#ifdef USE_API_NOISE
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#include "noise/protocol.h"
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#include "api_noise_context.h"
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namespace esphome::api {
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class APINoiseFrameHelper final : public APIFrameHelper {
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public:
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APINoiseFrameHelper(std::unique_ptr<socket::Socket> socket, std::shared_ptr<APINoiseContext> ctx,
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const ClientInfo *client_info)
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: APIFrameHelper(std::move(socket), client_info), ctx_(std::move(ctx)) {
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// Noise header structure:
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// Pos 0: indicator (0x01)
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// Pos 1-2: encrypted payload size (16-bit big-endian)
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// Pos 3-6: encrypted type (16-bit) + data_len (16-bit)
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// Pos 7+: actual payload data
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frame_header_padding_ = 7;
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}
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~APINoiseFrameHelper() override;
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APIError init() override;
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APIError loop() override;
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APIError read_packet(ReadPacketBuffer *buffer) override;
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APIError write_protobuf_packet(uint8_t type, ProtoWriteBuffer buffer) override;
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APIError write_protobuf_packets(ProtoWriteBuffer buffer, std::span<const PacketInfo> packets) override;
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protected:
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APIError state_action_();
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APIError try_read_frame_(std::vector<uint8_t> *frame);
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APIError write_frame_(const uint8_t *data, uint16_t len);
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APIError init_handshake_();
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APIError check_handshake_finished_();
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void send_explicit_handshake_reject_(const std::string &reason);
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APIError handle_handshake_frame_error_(APIError aerr);
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APIError handle_noise_error_(int err, const char *func_name, APIError api_err);
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// Pointers first (4 bytes each)
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NoiseHandshakeState *handshake_{nullptr};
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NoiseCipherState *send_cipher_{nullptr};
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NoiseCipherState *recv_cipher_{nullptr};
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// Shared pointer (8 bytes on 32-bit = 4 bytes control block pointer + 4 bytes object pointer)
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std::shared_ptr<APINoiseContext> ctx_;
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// Vector (12 bytes on 32-bit)
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std::vector<uint8_t> prologue_;
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// NoiseProtocolId (size depends on implementation)
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NoiseProtocolId nid_;
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// Group small types together
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// Fixed-size header buffer for noise protocol:
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// 1 byte for indicator + 2 bytes for message size (16-bit value, not varint)
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// Note: Maximum message size is UINT16_MAX (65535), with a limit of 128 bytes during handshake phase
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uint8_t rx_header_buf_[3];
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uint8_t rx_header_buf_len_ = 0;
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// 4 bytes total, no padding
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};
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} // namespace esphome::api
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#endif // USE_API_NOISE
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#endif // USE_API
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