mdttool

This a utility for manipulating MDT and MDN files used to load firmware. These files use an ELF header, followed by the certificates used for signing the files. MDT files are used on Android and support a single executable, whereas MBN files are used on Linux and support multiple executables.

The executable is split using the program headers in the ELF header, usually producing 9 separate files. The --split command will split the MBN or ELF file into the seperate files, while the --merge command combines the seperate files into an executable which can be used for disassembly. The --dump command is similar to what the readelf program displays.

Usage

usage: mdttool.py [-h] [-v] [-d] [-s] [-e] [-m] [-c] FILE

options:
-h, --help     show this help message and exit
-v, --verbose  verbose output
-d, --dump     Dump All Headers
-s, --split    Export the programs from the ELF file
-e, --extract  Extract the SSL certificates from the ELF file
-m, --merge    Merge all the program headers into an ELF file
-c, --create   Create an MDT file

Dump

This is a very verbose recursive dump of the ELF header, and program headers, and the section headers.

Split

This splits an ELF file into multiple files based on the program header. This is the format expected on Android.

Merge

This merges all of the separate files back into a single ELF file for analysis.

Extract

This extracts the 3 SSl certificates from a .mdt file into seperate files so they can be validated.

Create

This creates a .mdt file from it's separate files. This uses the .b00 file, which contains the ELF header, followed by the 3 SSl certificates.