Generate an offline minecraft UUID v3 based on the case sensitive player name

minecraft_offline_uuid.py

#!/usr/bin/env python3

#Gets username as string, returns Minecraft offline UUID as string
#Translated by Nikdoge from source in PHP https://gist.github.com/games647/2b6a00a8fc21fd3b88375f03c9e2e603
import hashlib
import sys

def main():
    #Getting argument from command line as username to convert
    #Printing UUID
    print(construct_offline_player_uuid(sys.argv[1]))

def construct_offline_player_uuid(username):
    #extracted from the java code:
    #new GameProfile(UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(Charsets.UTF_8)), name));
    string = "OfflinePlayer:" + username
    hash = hashlib.md5(string.encode('utf-8')).digest()
    byte_array = [byte for byte in hash]
    #set the version to 3 -> Name based md5 hash
    byte_array[6] = hash[6] & 0x0f | 0x30
    #IETF variant
    byte_array[8] = hash[8] & 0x3f | 0x80

    hash_modified = bytes(byte_array)
    offline_player_uuid = add_uuid_stripes(hash_modified.hex())

    return offline_player_uuid

def add_uuid_stripes(string):
    string_striped = (
        string[:8] + '-' +
        string[8:12] + '-' +
        string[12:16] + '-' +
        string[16:20] + '-' +
        string[20:]
    )
    return string_striped

if __name__ == '__main__':
    main()
    

you just save my life thank you