1337-diff

This tool accepts two input files and produces patch (diff) in .1337-file format. This format is compatible with patches produced by x64dbg and applied by Win_1337_Apply_Patch tool.

This tool is intended for internal usage to automate routine tasks related to windows patches. Implementation is really slow and prefers code transparency and correctness over speed.

Requirements

Python 3

Synopsys

$ ./1337-diff.py -h
usage: 1337-diff.py [-h] [-f FILENAME] [-l LIMIT]
                    ORIG_FILE PATCHED_FILE [OUTPUT_FILE]

Make .1337 patch file from original and patched files

positional arguments:
  ORIG_FILE             original file
  PATCHED_FILE          patched file
  OUTPUT_FILE           filename for patch output. Default: basename of
                        original filename with .1337 extension

optional arguments:
  -h, --help            show this help message and exit
  -f FILENAME, --header-filename FILENAME
                        filename specified in resulting patch header. Default:
                        basename of original filename.
  -l LIMIT, --limit LIMIT
                        stop after number of differences

Example

$ ./1337-diff.py ~/w418.81/orig/nvcuvid.dll ~/w418.81/patched/nvcuvid.dll 
$ cat nvcuvid.1337 
>nvcuvid.dll
00000000000DE736:74->90
00000000000DE737:08->90$

Note no newline at the end of file and CRLF line breaks.