BIOSUtilities v24.10.01

Complete repository overhaul into python project
Re-designed BIOSUtility base template class flow
Re-structured utilities as BIOSUtility inherited
Re-structured project for 3rd-party compatibility
Unified project requirements and package version
Code overhaul with type hints and linting support
Switched external executable dependencies via PATH
BIOSUtility enforces simple check and parse methods
Utilities now work with both path and buffer inputs
Adjusted class, method, function names and parameters
Improved Dell PFS Update Extractor sub-PFAT processing
Improved Award BIOS Module Extractor corruption handling
Improved Apple EFI Image Identifier to expose the EFI ID
Improved Insyde iFlash/iFdPacker Extractor with ISH & PDT
Re-written Apple EFI Package Extractor to support all PKG

biosutilities/common/checksums.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3 -B
+# coding=utf-8
+
+"""
+Copyright (C) 2022-2024 Plato Mavropoulos
+"""
+
+
+# Get Checksum 16-bit
+def checksum_16(data: bytes | bytearray, value: int = 0, order: str = 'little') -> int:
+    """ Calculate Checksum-16 of data, controlling IV and Endianess """
+
+    for idx in range(0, len(data), 2):
+        # noinspection PyTypeChecker
+        value += int.from_bytes(bytes=data[idx:idx + 2], byteorder=order)  # type: ignore
+
+    value &= 0xFFFF
+
+    return value
+
+
+# Get Checksum 8-bit XOR
+def checksum_8_xor(data: bytes | bytearray, value: int = 0) -> int:
+    """ Calculate Checksum-8 XOR of data, controlling IV """
+
+    for byte in data:
+        value ^= byte
+
+    value ^= 0x0
+
+    return value