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This commit is contained in:
J. Nick Koston
2025-09-21 11:47:15 -06:00
parent d5b57384bf
commit 9cbbb167db
5 changed files with 20 additions and 22 deletions
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29
esphome/components/esphome/ota/ota_esphome.cpp
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@@ -266,11 +266,13 @@ void ESPHomeOTAComponent::handle_data_() {
// TODO: Remove this entire ifdef block in 2026.1.0
if (client_supports_sha256) {
sha256::SHA256 sha_hasher;
auth_success = this->perform_hash_auth_(&sha_hasher, this->password_, 16, ota::OTA_RESPONSE_REQUEST_SHA256_AUTH);
auth_success = this->perform_hash_auth_(&sha_hasher, this->password_, 16, ota::OTA_RESPONSE_REQUEST_SHA256_AUTH,
LOG_STR("SHA256"));
} else {
ESP_LOGW(TAG, "Using MD5 auth for compatibility (deprecated)");
md5::MD5Digest md5_hasher;
auth_success = this->perform_hash_auth_(&md5_hasher, this->password_, 8, ota::OTA_RESPONSE_REQUEST_AUTH);
auth_success =
this->perform_hash_auth_(&md5_hasher, this->password_, 8, ota::OTA_RESPONSE_REQUEST_AUTH, LOG_STR("MD5"));
}
#else
// Strict mode: SHA256 required on capable platforms (future default)
@@ -512,12 +514,15 @@ void ESPHomeOTAComponent::yield_and_feed_watchdog_() {
delay(1);
}
void ESPHomeOTAComponent::log_auth_warning_(const LogString *action, const LogString *hash_name) {
ESP_LOGW(TAG, "Auth: %s %s failed", LOG_STR_ARG(action), LOG_STR_ARG(hash_name));
}
// Non-template function definition to reduce binary size
bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string &password, size_t nonce_size,
uint8_t auth_request) {
uint8_t auth_request, const LogString *name) {
// Get sizes from the hasher
const size_t hex_size = hasher->get_hex_size();
const char *name = hasher->get_name();
// Use fixed-size buffers for the maximum possible hash size (SHA256 = 64 chars)
// This avoids dynamic allocation overhead
@@ -560,11 +565,11 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
// Use hex_buffer1 for nonce
hasher->get_hex(hex_buffer1);
hex_buffer1[hex_size] = '\0';
ESP_LOGV(TAG, "Auth: %s Nonce is %s", name, hex_buffer1);
ESP_LOGV(TAG, "Auth: %s Nonce is %s", LOG_STR_ARG(name), hex_buffer1);
// Send nonce
if (!this->writeall_(reinterpret_cast<uint8_t *>(hex_buffer1), hex_size)) {
ESP_LOGW(TAG, "Auth: Writing %s nonce failed", name);
this->log_auth_warning_(LOG_STR("Writing nonce"), name);
return false;
}
@@ -575,11 +580,11 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
// Receive cnonce into hex_buffer2
if (!this->readall_(reinterpret_cast<uint8_t *>(hex_buffer2), hex_size)) {
ESP_LOGW(TAG, "Auth: Reading %s cnonce failed", name);
this->log_auth_warning_(LOG_STR("Reading cnonce"), name);
return false;
}
hex_buffer2[hex_size] = '\0';
ESP_LOGV(TAG, "Auth: %s CNonce is %s", name, hex_buffer2);
ESP_LOGV(TAG, "Auth: %s CNonce is %s", LOG_STR_ARG(name), hex_buffer2);
// Add cnonce to hash
hasher->add(hex_buffer2, hex_size);
@@ -588,21 +593,21 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
hasher->calculate();
hasher->get_hex(hex_buffer1);
hex_buffer1[hex_size] = '\0';
ESP_LOGV(TAG, "Auth: %s Result is %s", name, hex_buffer1);
ESP_LOGV(TAG, "Auth: %s Result is %s", LOG_STR_ARG(name), hex_buffer1);
// Receive response - reuse hex_buffer2
if (!this->readall_(reinterpret_cast<uint8_t *>(hex_buffer2), hex_size)) {
ESP_LOGW(TAG, "Auth: Reading %s response failed", name);
this->log_auth_warning_(LOG_STR("Reading response"), name);
return false;
}
hex_buffer2[hex_size] = '\0';
ESP_LOGV(TAG, "Auth: %s Response is %s", name, hex_buffer2);
ESP_LOGV(TAG, "Auth: %s Response is %s", LOG_STR_ARG(name), hex_buffer2);
// Compare
bool matches = memcmp(hex_buffer1, hex_buffer2, hex_size) == 0;
if (!matches) {
ESP_LOGW(TAG, "Auth failed! %s passwords do not match", name);
ESP_LOGW(TAG, "Auth failed! %s passwords do not match", LOG_STR_ARG(name));
}
return matches;

4
esphome/components/esphome/ota/ota_esphome.h
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@@ -31,12 +31,14 @@ class ESPHomeOTAComponent : public ota::OTAComponent {
protected:
void handle_handshake_();
void handle_data_();
bool perform_hash_auth_(HashBase *hasher, const std::string &password, size_t nonce_size, uint8_t auth_request);
bool perform_hash_auth_(HashBase *hasher, const std::string &password, size_t nonce_size, uint8_t auth_request,
const LogString *name);
bool readall_(uint8_t *buf, size_t len);
bool writeall_(const uint8_t *buf, size_t len);
void log_socket_error_(const LogString *msg);
void log_read_error_(const LogString *what);
void log_start_(const LogString *phase);
void log_auth_warning_(const LogString *action, const LogString *hash_name);
void cleanup_connection_();
void yield_and_feed_watchdog_();

3
esphome/components/md5/md5.h
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@@ -53,9 +53,6 @@ class MD5Digest : public HashBase {
/// Get the size of the hex output (32 for MD5)
size_t get_hex_size() const override { return 32; }
/// Get the algorithm name for logging
const char *get_name() const override { return "MD5"; }
/// Compare the digest against a provided byte-encoded digest (16 bytes).
bool equals_bytes(const uint8_t *expected);

3
esphome/components/sha256/sha256.h
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@@ -40,9 +40,6 @@ class SHA256 : public esphome::HashBase {
/// Get the size of the hex output (64 for SHA256)
size_t get_hex_size() const override { return 64; }
/// Get the algorithm name for logging
const char *get_name() const override { return "SHA256"; }
bool equals_bytes(const uint8_t *expected);
bool equals_hex(const char *expected);

3
esphome/core/hash_base.h
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@@ -25,9 +25,6 @@ class HashBase {
/// Get the size of the hex output (32 for MD5, 64 for SHA256)
virtual size_t get_hex_size() const = 0;
/// Get the algorithm name for logging
virtual const char *get_name() const = 0;
};
} // namespace esphome