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Code Issues Releases Wiki Activity

random_bytes

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This commit is contained in:
J. Nick Koston
2025-09-25 20:36:04 -05:00
parent f33819bb8e
commit ba73061a4f
1 changed files with 5 additions and 12 deletions
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17
esphome/components/esphome/ota/ota_esphome.cpp
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@@ -15,6 +15,7 @@
#include "esphome/components/ota/ota_backend_esp_idf.h"
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#include "esphome/core/util.h"
@@ -528,14 +529,6 @@ 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) {
@@ -553,10 +546,10 @@ bool ESPHomeOTAComponent::perform_hash_auth_(HashBase *hasher, const std::string
hasher->init();
// Generate nonce seed bytes
uint32_to_bytes(random_uint32(), nonce_bytes);
if (nonce_len > 4) {
uint32_to_bytes(random_uint32(), nonce_bytes + 4);
// Generate nonce seed bytes using random_bytes
if (!random_bytes(nonce_bytes, nonce_len)) {
this->log_auth_warning_(LOG_STR("Random bytes generation failed"), name);
return false;
}
hasher->add(nonce_bytes, nonce_len);
hasher->calculate();