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Code Issues Releases Wiki Activity

[api] Use std::unique_ptr for fixed-size byte buffers in Noise protocol (#11278)

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This commit is contained in:
J. Nick Koston
2025-10-15 16:41:25 -10:00
committed by GitHub
parent 22056e0809
commit 10ca86ae8d
1 changed files with 11 additions and 12 deletions
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23
esphome/components/api/api_frame_helper_noise.cpp
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@@ -242,7 +242,6 @@ APIError APINoiseFrameHelper::state_action_() {
const std::string &name = App.get_name();
const std::string &mac = get_mac_address();
std::vector<uint8_t> msg;
// Calculate positions and sizes
size_t name_len = name.size() + 1; // including null terminator
size_t mac_len = mac.size() + 1; // including null terminator
@@ -250,17 +249,17 @@ APIError APINoiseFrameHelper::state_action_() {
size_t mac_offset = name_offset + name_len;
size_t total_size = 1 + name_len + mac_len;
msg.resize(total_size);
auto msg = std::make_unique<uint8_t[]>(total_size);
// chosen proto
msg[0] = 0x01;
// node name, terminated by null byte
std::memcpy(msg.data() + name_offset, name.c_str(), name_len);
std::memcpy(msg.get() + name_offset, name.c_str(), name_len);
// node mac, terminated by null byte
std::memcpy(msg.data() + mac_offset, mac.c_str(), mac_len);
std::memcpy(msg.get() + mac_offset, mac.c_str(), mac_len);
aerr = write_frame_(msg.data(), msg.size());
aerr = write_frame_(msg.get(), total_size);
if (aerr != APIError::OK)
return aerr;
@@ -339,32 +338,32 @@ void APINoiseFrameHelper::send_explicit_handshake_reject_(const LogString *reaso
#ifdef USE_STORE_LOG_STR_IN_FLASH
// On ESP8266 with flash strings, we need to use PROGMEM-aware functions
size_t reason_len = strlen_P(reinterpret_cast<PGM_P>(reason));
std::vector<uint8_t> data;
data.resize(reason_len + 1);
size_t data_size = reason_len + 1;
auto data = std::make_unique<uint8_t[]>(data_size);
data[0] = 0x01; // failure
// Copy error message from PROGMEM
if (reason_len > 0) {
memcpy_P(data.data() + 1, reinterpret_cast<PGM_P>(reason), reason_len);
memcpy_P(data.get() + 1, reinterpret_cast<PGM_P>(reason), reason_len);
}
#else
// Normal memory access
const char *reason_str = LOG_STR_ARG(reason);
size_t reason_len = strlen(reason_str);
std::vector<uint8_t> data;
data.resize(reason_len + 1);
size_t data_size = reason_len + 1;
auto data = std::make_unique<uint8_t[]>(data_size);
data[0] = 0x01; // failure
// Copy error message in bulk
if (reason_len > 0) {
std::memcpy(data.data() + 1, reason_str, reason_len);
std::memcpy(data.get() + 1, reason_str, reason_len);
}
#endif
// temporarily remove failed state
auto orig_state = state_;
state_ = State::EXPLICIT_REJECT;
write_frame_(data.data(), data.size());
write_frame_(data.get(), data_size);
state_ = orig_state;
}
APIError APINoiseFrameHelper::read_packet(ReadPacketBuffer *buffer) {