def decrypt(table, text):
numbers = ''
text = Polybius.encrypt(table, text)
a, b = text[:len(text) / 2], text[len(text) / 2:]
numbers = ''.join(a[i] + b[i] for i in range(len(a)))
return Polybius.decrypt(table, numbers)
def decrypt(table, text):
numbers = ''
text = Polybius.encrypt(table, text)
a, b = text[:len(text) / 2], text[len(text) / 2:]
numbers = ''.join(a[i] + b[i] for i in range(len(a)))
return Polybius.decrypt(table, numbers)
def encrypt(table, words):
string = table
cipher_row, cipher_col = '', ''
for ch in words.upper():
for row in range(len(table)):
if ch in table[row]:
cipher_row += str(row + 1)
cipher_col += str((table[row].index(ch) + 1))
return Polybius.decrypt(table, cipher_row + cipher_col)
def encrypt(table, words):
string = table
cipher_row, cipher_col = '', ''
for ch in words.upper():
for row in range(len(table)):
if ch in table[row]:
cipher_row += str(row + 1)
cipher_col += str((table[row].index(ch) + 1))
return Polybius.decrypt(table, cipher_row + cipher_col)
return numbers
if __name__ == '__main__':
parser = optparse.OptionParser(version=__version__,
usage='Usage: %prog [options] [args]',
description='Trifid cipher is a cipher which combines the Polybius square with transposition, and uses fractionation to achieve diffusion.')
parser.add_option('-d', dest='decrypt', action='store_true', default=False)
parser.add_option('-k', dest='key', action='store', default='', type='string')
parser.add_option('-V', dest='verbose', action='store_true', default=False)
parser.add_option('-f', dest='file', action='store', default=False)
(options, args) = parser.parse_args()
array = Polybius.generate_array(key=options.key)
Polybius.display_array(array)
if options.file:
print ''
print ' IN> ' + options.file
try:
file_stream = codecs.open(options.file, 'r', 'dbcs')
file_output = codecs.open('_' + options.file, 'w', 'dbcs')
for line in file_stream:
if options.decrypt:
file_output.write(Polybius.decode(
transform_back(
Polybius.encode(line, array)), array))
a, b = text[:len(text) / 2], text[len(text) / 2:]
numbers = ''.join(a[i] + b[i] for i in range(len(a)))
return Polybius.decrypt(table, numbers)
if __name__ == '__main__':
# 本例推算见 http://en.wikipedia.org/wiki/Bifid_cipher
# 初始化棋盘（也可以用 polybius.generate_table 来生成一个随机的)
table = [['B', 'G', 'W', 'K', 'Z'], ['Q', 'P', 'N', 'D', 'S'],
['I', 'O', 'A', 'X', 'E'], ['F', 'C', 'L', 'U', 'M'],
['T', 'H', 'Y', 'V', 'R']]
# 输出棋盘
Polybius.print_table(table)
# 密文
text = "F L E E A T O N C E"
# 使用棋盘加密字符串
ciphertext = encrypt(table, text)
# 密文
print('密文: ' + ciphertext)
# 解密字符串
print('解密: ' + decrypt(table, ciphertext))
print ''
print 'Szyfr Delastelle\'a'
print ''
print ' Autor: ' + __author__
if options.decrypt:
print ' Tryb: Deszyfrowanie'
else:
print ' Tryb: Szyfrowanie'
if options.verbose:
print 'Tryb verbose: Tak'
else:
print 'Tryb verbose: Nie'
array = Polybius.generate_array(key=options.key)
print ' Szachownica:'
Polybius.display_array(array)
if options.file:
print ''
print ' IN> ' + options.file
try:
file_stream = codecs.open(options.file, 'r', 'dbcs')
file_output = codecs.open('_' + options.file, 'w', 'dbcs')
for line in file_stream:
if options.decrypt:
file_output.write(Polybius.decode(
transform_back(
numbers = ''.join(a[i] + b[i] for i in range(len(a)))
return Polybius.decrypt(table, numbers)
if __name__ == '__main__':
# 本例推算见 http://en.wikipedia.org/wiki/Bifid_cipher
# 初始化棋盘（也可以用 polybius.generate_table 来生成一个随机的)
table = [['B', 'G', 'W', 'K', 'Z'],
['Q', 'P', 'N', 'D', 'S'],
['I', 'O', 'A', 'X', 'E'],
['F', 'C', 'L', 'U', 'M'],
['T', 'H', 'Y', 'V', 'R']]
# 输出棋盘
Polybius.print_table(table)
# 密文
text = "F L E E A T O N C E"
# 使用棋盘加密字符串
ciphertext = encrypt(table, text)
# 密文
print('密文: ' + ciphertext)
# 解密字符串
print('解密: ' + decrypt(table, ciphertext))
