Node / meshtastic / Meshtastic-Android / files / feature / firmware / src / commonMain / kotlin / org / meshtastic / feature / firmware / ota / FirmwareHashUtil.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.feature.firmware.ota

Tff7b72import T7ee787okio.ByteString.Companion.toByteString

T8b949e/** KMP utility functions for firmware hash calculation. */

Tff7b72object T56d364FirmwareHashUtil Tb4b4b4{

T8b949e/**

* Calculate SHA-256 hash of raw bytes.

*

* @param data Firmware bytes to hash

* @return 32-byte SHA-256 hash

*/

Tff7b72fun Td2a8ffcalculateSha256BytesTb4b4b4(Te6edf3dataTb4b4b4: Te6edf3ByteArrayTb4b4b4)Tb4b4b4: Te6edf3ByteArray Tff7b72= Te6edf3dataTb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3sha256Tb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3toByteArrayTb4b4b4(Tb4b4b4)

T8b949e/** Convert byte array to lowercase hex string. */

Tff7b72fun Td2a8ffbytesToHexTb4b4b4(Te6edf3bytesTb4b4b4: Te6edf3ByteArrayTb4b4b4)Tb4b4b4: Tffa657String Tff7b72= Te6edf3bytesTb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3hexTb4b4b4(Tb4b4b4)

T8b949e/** Calculate the MD5 hex digest of raw bytes — used to verify a download against a firmware manifest's `md5`. */

Tff7b72fun Td2a8ffcalculateMd5HexTb4b4b4(Te6edf3dataTb4b4b4: Te6edf3ByteArrayTb4b4b4)Tb4b4b4: Tffa657String Tff7b72= Te6edf3dataTb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3md5Tb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3hexTb4b4b4(Tb4b4b4)

Tb4b4b4}