Checking file integrity for ACPI tables, UEFI drivers and KEXT executables

[notiflux]

• Calculate checksum for ACPI tables
• Verify length of ACPI tables
• Check file extension for ACPI tables
• Check for references to DTGP method in SSDT tables and its presence in DSDT
• Check magic value and file extension for UEFI drivers
• Check magic value for KEXT executables