diff options
| -rwxr-xr-x | ls47.py | 63 |
1 files changed, 36 insertions, 27 deletions
@@ -1,10 +1,15 @@ -#!/usr/bin/python2 +#!/usr/bin/python # -*- coding: utf-8 -*- +# +# This software is hereby released into public domain. Use it wisely. +# +# Originally written by Mirek Kratochvil (2017) +# Python3 port by Bernhard Esslinger (Feb 2018) import random letters = "_abcdefghijklmnopqrstuvwxyz.0123456789,-+*/:?!'()" -tiles = zip(letters, map(lambda x: (x / 7, x % 7), range(7 * 7))) +tiles = list(zip(letters, map(lambda x: (x // 7, x % 7), range(7 * 7)))) padding_size = 10 @@ -23,7 +28,7 @@ def check_key(key): def find_ix(letter): - m = filter(lambda (l, pos): l == letter, tiles) + m = [l for l in tiles if l[0] == letter] if len(m) != 1: raise ValueError('Letter ' + letter + ' not in LS47!') for (l, pos) in m: @@ -33,20 +38,20 @@ def find_ix(letter): def find_pos(key, letter): p = key.find(letter) if p >= 0 and p < 7 * 7: - return (p / 7, p % 7) + return (p // 7, p % 7) raise ValueError('Letter ' + letter + ' not in key?!') -def add_pos((ax, ay), (bx, by)): - return ((ax + bx) % 7, (ay + by) % 7) +def add_pos(a, b): + return ((a[0] + b[0]) % 7, (a[1] + b[1]) % 7) -def sub_pos((ax, ay), (bx, by)): - return ((ax - bx) % 7, (ay - by) % 7) +def sub_pos(a, b): + return ((a[0] - b[0]) % 7, (a[1] - b[1]) % 7) -def find_at_pos(key, (row, col)): - return key[col + row * 7] +def find_at_pos(key, coord): + return key[coord[1] + coord[0] * 7] def rotate_right(key, row, n): @@ -56,28 +61,27 @@ def rotate_right(key, row, n): def rotate_down(key, col, n): - lines = map(lambda i: key[i * 7:(i + 1) * 7], range(7)) - lefts = map(lambda l: l[:col], lines) - mids = map(lambda l: l[col], lines) - rights = map(lambda l: l[col + 1:], lines) + lines = [key[i * 7:(i + 1) * 7] for i in range(7)] + lefts = [l[:col] for l in lines] + mids = [l[col] for l in lines] + rights = [l[col + 1:] for l in lines] n = (7 - n % 7) % 7 mids = mids[n:] + mids[:n] - return reduce(lambda a, b: a + b, map(lambda i: lefts[i] + mids[i] \ - + rights[i], range(7))) + return ''.join(lefts[i] + mids[i] + rights[i] for i in range(7)) -def rotate_marker_right((mrow, mcol), row, n): - if mrow != row: - return (mrow, mcol) +def rotate_marker_right(m, row, n): + if m[0] != row: + return (m[0], m[1]) else: - return (mrow, (mcol + n) % 7) + return (m[0], (m[1] + n) % 7) -def rotate_marker_down((mrow, mcol), col, n): - if mcol != col: - return (mrow, mcol) +def rotate_marker_down(m, col, n): + if m[1] != col: + return (m[0], m[1]) else: - return ((mrow + n) % 7, mcol) + return ((m[0] + n) % 7, m[1]) def derive_key(password): @@ -150,10 +154,15 @@ if __name__ == '__main__': # a bit of test! + print('letters in this implementation (line by line):') + print(letters) + # print('tiles positions: ' + str(tiles)) + key = derive_key('s3cret_p4ssw0rd/31337') - print 'key:', key + print('test key: ' + key) enc = encrypt_pad(key, 'conflagrate_the_rose_bush_at_six!', 'peace-vector-3') - print 'encrypted:', enc + + print('encrypted test: ' + enc) dec = decrypt_pad(key, enc) - print 'decrypted:', dec + print('decrypted test: ' + dec) |