As part of a filesystem watcher program I maintain as part of a larger site, I need to obtain the ed2k hash of some files. Believe me when I tell you I have searched high and low for an Edonkey2000 hash algorithm in python. I’ve seen massive libraries that scared the bejesus out of me, but nothing clean, concise, and without external dependencies. Enjoy the below. It’s worth noting it’s just as fast as the C version.
import hashlib def hash_file(self, file_path): """ Returns the ed2k hash of a given file. """ md4 = hashlib.new('md4').copy def gen(f): while True: x = f.read(9728000) if x: yield x else: return def md4_hash(data): m = md4() m.update(data) return m with open(file_path, 'rb') as f: a = gen(f) hashes = [md4_hash(data).digest() for data in a] if len(hashes) == 1: return hashes.encode("hex") else: return md4_hash(reduce(lambda a,d: a + d, hashes, "")).hexdigest()