Patch binary of sublimtext amd64 linux build 4121

sublimetext_4121_crack.py

import os


sublime_binary_path = "/tmp/sublime_text"
version_magic_string = "/updates/4/stable_update_check?version=4121&platform=linux&arch=x64"
sz_magic_string = 67
version_magic_string_offset = 0x000106bd # (Real offset from xxd)

is_file_read = os.access(sublime_binary_path, os.R_OK)
if not is_file_read:
    print(f"File {sublime_binary_path} is not readable. Exit!")
    exit(1)
is_file_write = os.access(sublime_binary_path, os.W_OK)
if not is_file_write:
    print(f"File {sublime_binary_path} is not writable. Only check for patch.")


f = open(sublime_binary_path, "rb")
f.seek(version_magic_string_offset)
data = f.read(sz_magic_string)
if data.decode() == version_magic_string:
    print("File matched sublime_text build 4121")
else:
    print("File doesn't have build 4121 magic string")
f.close()


offset_1 = 0x00376160 # data = 84 8c; patched = 85 8c
offset_2 = 0x0037621b # data = 74 09; patched = 75 09

if is_file_write:
    f = open(sublime_binary_path, "rb+")

    f.seek(offset_1)
    if f.read(2) == b"\x84\x8c":
        print("Patching first jump")
        f.seek(offset_1)
        f.write(b"\x85")

    f.seek(offset_2)
    if f.read(2) == b"\x74\x09":
        print("Patching second jump")
        f.seek(offset_2)
        f.write(b"\x75")

    f.close()
else:
    f = open(sublime_binary_path, "rb")
    f.seek(offset_1)
    if f.read(2) == b"\x84\x8c":
        print("First jump is not patched")
    f.seek(offset_2)
    if f.read(2) == b"\x74\x09":
        print("Second jump is not patched")
    f.close()

First offset:

Second offset

Use reverse jump method to patch license calculation

can i use this script to patch linux st?

File /tmp/sublime_text is not readable. Exit!

File /tmp/sublime_text is not readable. Exit!

The file path is hard coded. You just need to copy the sublime_text binary to /tmp/, run the script, and copy the patched binary to original path. Or just edit the absolute path to sublime_text, make sure the binary file is editable.
My patch is using the reverse jump method to edit return code of checking license status. Sublime text has an other background thread to check it. It is possibly an online check and I didn't have time to track the code out.

@dmknght what did you use to decompile this? I looked at your screenshot and don't know what tool it is.

@dmknght what did you use to decompile this? I looked at your screenshot and don't know what tool it is.

It's ghidra.