| 159 | } |
| 160 | |
| 161 | String getSketchSHA256() { |
| 162 | const size_t HASH_LEN = 32; // SHA-256 digest length |
| 163 | |
| 164 | uint8_t sha_256[HASH_LEN] = {0}; |
| 165 | |
| 166 | // get sha256 digest for running partition |
| 167 | if (esp_partition_get_sha256(esp_ota_get_running_partition(), sha_256) == 0) { |
| 168 | char buffer[2 * HASH_LEN + 1]; |
| 169 | |
| 170 | for (size_t index = 0; index < HASH_LEN; index++) { |
| 171 | uint8_t nibble = (sha_256[index] & 0xf0) >> 4; |
| 172 | buffer[2 * index] = nibble < 10 ? char(nibble + '0') : char(nibble - 10 + 'A'); |
| 173 | |
| 174 | nibble = sha_256[index] & 0x0f; |
| 175 | buffer[2 * index + 1] = nibble < 10 ? char(nibble + '0') : char(nibble - 10 + 'A'); |
| 176 | } |
| 177 | |
| 178 | buffer[2 * HASH_LEN] = '\0'; |
| 179 | |
| 180 | return String(buffer); |
| 181 | } else { |
| 182 | |
| 183 | return String(); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * |