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This commit is contained in:
J. Nick Koston
2025-09-26 23:38:13 -05:00
parent 9f421ca60c
commit 6430ae80cf
1 changed files with 13 additions and 7 deletions
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20
esphome/components/esphome/ota/ota_esphome.cpp
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@@ -665,10 +665,10 @@ bool ESPHomeOTAComponent::handle_auth_read_() {
const size_t to_read = hex_size * 2; // CNonce + Response
// Try to read remaining bytes (CNonce + Response)
// We need to read into the buffer starting after the auth_type (1 byte) and nonce (hex_size bytes)
size_t offset = 1 + hex_size;
// We read cnonce+response starting at offset 1+hex_size (after auth_type and our nonce)
size_t cnonce_offset = 1 + hex_size; // Offset where cnonce should be stored in buffer
size_t remaining = to_read - this->auth_buf_pos_;
ssize_t read = this->client_->read(this->auth_buf_.get() + offset + this->auth_buf_pos_, remaining);
ssize_t read = this->client_->read(this->auth_buf_.get() + cnonce_offset + this->auth_buf_pos_, remaining);
if (read == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
@@ -760,11 +760,17 @@ bool ESPHomeOTAComponent::prepare_auth_nonce_(HashBase *hasher) {
}
bool ESPHomeOTAComponent::verify_hash_auth_(HashBase *hasher, size_t hex_size) {
// Get pointers to the data
size_t offset = 1 + hex_size; // Skip auth_type byte and nonce
// Buffer layout after AUTH_READ completes:
// [0]: auth_type (1 byte)
// [1...hex_size]: nonce (hex_size bytes) - our random nonce sent in AUTH_SEND
// [1+hex_size...1+2*hex_size-1]: cnonce (hex_size bytes) - client's nonce
// [1+2*hex_size...1+3*hex_size-1]: response (hex_size bytes) - client's hash
// Get pointers to the data in the buffer
char *nonce = reinterpret_cast<char *>(this->auth_buf_.get() + 1); // Skip auth_type byte
char *cnonce = reinterpret_cast<char *>(this->auth_buf_.get() + offset);
const char *response = cnonce + hex_size;
size_t cnonce_offset = 1 + hex_size; // Offset where cnonce starts in buffer
char *cnonce = reinterpret_cast<char *>(this->auth_buf_.get() + cnonce_offset);
const char *response = cnonce + hex_size; // Response immediately follows cnonce
// Calculate expected hash: password + nonce + cnonce
hasher->init();