dispatcher_test.py

from overviewer_core import dispatcher
from overviewer_core import signals

import hashlib
import string
import os
import sys
import socket

def md5(s):
    return hashlib.md5(s).hexdigest()

class HashChecker(object):
    on_find = signals.Signal('HashChecker', 'on_find')
    
    def __init__(self, length, letters=string.ascii_lowercase, hasher=md5, target="000"):
        super(HashChecker, self).__init__()
        self.length = length
        self.letters = letters
        self.num_letters = len(letters)
        self.hasher = hasher
        self.target = target
    
    def do_preprocessing(self):
        pass
    
    def get_num_phases(self):
        return 1
    
    def iterate_work_items(self, phase):
        for length in xrange(self.length):
            length = length + 1
            batch_size = 32 ** 4
            space_size = self.num_letters ** length
            batches = space_size // batch_size
            if space_size % batch_size > 0:
                batches += 1
            i = 0
            while i < batches:
                yield ((length, (batch_size * i, min(batch_size * (i + 1), space_size))), [])
                i += 1
    
    def do_work(self, workobj):
        length, min_max = workobj
        print "=== checking length", length, "range", min_max
        j = min_max[0]
        while j < min_max[1]:
            i = j
            source_letters = []
            while i != 0:
                source_letters.append(i % self.num_letters)
                i = i // self.num_letters
            while len(source_letters) < length:
                source_letters.append(0)
            source = ''.join(map(lambda j: self.letters[j], source_letters))
            self.check_hash(source)
            j = j + 1
    
    def check_hash(self, src):
        hash = self.hasher(src)
        if hash.startswith(self.target):
            print "reporting", repr(src), "hashes to", hash
            self.on_find(src, hash, os.getpid(), socket.gethostname())

@HashChecker.on_find.register
def on_find_listener(src, hash, pid, hostname):
    prefix = "[{1}:{0}]".format(pid, hostname)
    while len(prefix) < 20:
        prefix = prefix + " "
    print prefix, "source", repr(src), "hashes to", hash

if __name__ == "__main__":
    if "-server" in sys.argv:
        d = dispatcher.MultiprocessingDispatcher(local_procs=0, address=('', 8010), authkey='hackme')
        hash1 = HashChecker(8, target='deadbeef')
        d.render_all([hash1], None)
        d.close()
    else:
        dispatcher.MultiprocessingDispatcher.start_manual_process(('hesperus.gammalevel.com', 8010), 'hackme')