p1 = calc_p(d1, m, init, end)
p2 = calc_p(d2, m, init, end)
if (p2 > p1):
reptbl = newrep
rearrtbl = newrearr
else:
r = random.random()
if (r < math.exp(p2 - p1)):
reptbl = newrep
rearrtbl = newrearr
if (p2 > cur_max):
cur_max = p2
cur_best = d2
elapsed = time.time() - start
print(
"Attempt {num}:\n Current best guess: {cur_best}, logP={cur_max}..."
.format(num=counter, cur_best=cur_best, cur_max=cur_max))
return cur_best
if __name__ == "__main__":
if (len(sys.argv) != 4):
raise Exception("usage: ./break_code.py coded-file corpus output-file")
random.seed()
encoded = encode.read_clean_file(sys.argv[1])
corpus = encode.read_clean_file(sys.argv[2])
decoded = break_code(encoded, corpus)
with open(sys.argv[3], "w") as file:
print(decoded, file=file)
def get_initial_encryption_tables():
letters = list(range(ord("a"), ord("z") + 1))
random.shuffle(letters)
replace_table = dict(
zip(map(chr, range(ord("a"),
ord("z") + 1)), map(chr, letters)))
rearrange_table = list(range(0, 4))
random.shuffle(rearrange_table)
return replace_table, rearrange_table
if __name__ == "__main__":
if len(sys.argv) != 3:
raise Exception("usage: break_code.py input-file output-file")
input = encode.read_clean_file(sys.argv[1])
letters = list(range(ord("a"), ord("z") + 1))
random.shuffle(letters)
replace_table = dict(
zip(map(chr, range(ord("a"),
ord("z") + 1)), map(chr, letters)))
rearrange_table = list(range(0, 4))
random.shuffle(rearrange_table)
with open(sys.argv[2], "w") as file:
print(encode.encode(input, replace_table, rearrange_table), file=file)