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This commit is contained in:
J. Nick Koston
2025-09-23 09:48:36 -05:00
parent 307ad1c18b
commit 106f8e6804
1 changed files with 10 additions and 9 deletions
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19
esphome/components/esphome/ota/ota_esphome.cpp
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@@ -528,6 +528,14 @@ void ESPHomeOTAComponent::log_auth_warning_(const LogString *action, const LogSt
ESP_LOGW(TAG, "Auth: %s %s failed", LOG_STR_ARG(action), LOG_STR_ARG(hash_name));
}
// Helper to convert uint32 to big-endian bytes
static inline void uint32_to_bytes(uint32_t value, uint8_t *bytes) {
bytes[0] = (value >> 24) & 0xFF;
bytes[1] = (value >> 16) & 0xFF;
bytes[2] = (value >> 8) & 0xFF;
bytes[3] = value & 0xFF;
}
// Non-template function definition to reduce binary size
bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string &password, uint8_t auth_request,
const LogString *name, char *buf) {
@@ -547,11 +555,7 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
// Generate nonce seed bytes
uint32_t r1 = random_uint32();
// Convert first uint32 to bytes (always needed for MD5)
nonce_bytes[0] = (r1 >> 24) & 0xFF;
nonce_bytes[1] = (r1 >> 16) & 0xFF;
nonce_bytes[2] = (r1 >> 8) & 0xFF;
nonce_bytes[3] = r1 & 0xFF;
uint32_to_bytes(r1, nonce_bytes);
if (nonce_len == 4) {
// MD5: 4 bytes from one random uint32
@@ -559,10 +563,7 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
} else {
// SHA256: 8 bytes from two random uint32s
uint32_t r2 = random_uint32();
nonce_bytes[4] = (r2 >> 24) & 0xFF;
nonce_bytes[5] = (r2 >> 16) & 0xFF;
nonce_bytes[6] = (r2 >> 8) & 0xFF;
nonce_bytes[7] = r2 & 0xFF;
uint32_to_bytes(r2, nonce_bytes + 4);
hasher->add(nonce_bytes, 8);
}
hasher->calculate();