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Fail hard if no random bytes available for encryption (#3067)
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parent
7b03e07908
commit
869743a742
3 changed files with 11 additions and 6 deletions
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@ -1,6 +1,7 @@
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#include "api_frame_helper.h"
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#include "api_frame_helper.h"
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#include "esphome/core/log.h"
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#include "esphome/core/log.h"
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#include "esphome/core/hal.h"
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#include "esphome/core/helpers.h"
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#include "esphome/core/helpers.h"
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#include "proto.h"
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#include "proto.h"
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#include <cstring>
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#include <cstring>
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@ -721,7 +722,12 @@ APIError APINoiseFrameHelper::shutdown(int how) {
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}
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}
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extern "C" {
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extern "C" {
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// declare how noise generates random bytes (here with a good HWRNG based on the RF system)
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// declare how noise generates random bytes (here with a good HWRNG based on the RF system)
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void noise_rand_bytes(void *output, size_t len) { esphome::random_bytes(reinterpret_cast<uint8_t *>(output), len); }
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void noise_rand_bytes(void *output, size_t len) {
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if (!esphome::random_bytes(reinterpret_cast<uint8_t *>(output), len)) {
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ESP_LOGE(TAG, "Failed to acquire random bytes, rebooting!");
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arch_restart();
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}
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}
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}
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}
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#endif // USE_API_NOISE
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#endif // USE_API_NOISE
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@ -287,13 +287,12 @@ uint32_t random_uint32() {
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#endif
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#endif
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}
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}
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float random_float() { return static_cast<float>(random_uint32()) / static_cast<float>(UINT32_MAX); }
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float random_float() { return static_cast<float>(random_uint32()) / static_cast<float>(UINT32_MAX); }
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void random_bytes(uint8_t *data, size_t len) {
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bool random_bytes(uint8_t *data, size_t len) {
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#ifdef USE_ESP32
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#ifdef USE_ESP32
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esp_fill_random(data, len);
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esp_fill_random(data, len);
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return true;
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#elif defined(USE_ESP8266)
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#elif defined(USE_ESP8266)
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if (os_get_random(data, len) != 0) {
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return os_get_random(data, len) == 0;
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ESP_LOGE(TAG, "Failed to generate random bytes!");
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}
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#else
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#else
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#error "No random source available for this configuration."
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#error "No random source available for this configuration."
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#endif
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#endif
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@ -311,7 +311,7 @@ uint32_t random_uint32();
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/// Return a random float between 0 and 1.
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/// Return a random float between 0 and 1.
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float random_float();
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float random_float();
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/// Generate \p len number of random bytes.
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/// Generate \p len number of random bytes.
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void random_bytes(uint8_t *data, size_t len);
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bool random_bytes(uint8_t *data, size_t len);
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///@}
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///@}
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