def decryprionMethodMatrix(file, key):
try:
with open(file, 'r') as fn:
msg = fn.read()
fn.close()
matrix = readMatrixFile(key)
archivo_desencriptado = decipher_hill(msg, matrix)
with open(file, 'w') as fn:
fn.write(archivo_desencriptado)
except ValueError as e:
print("Error Tecnico: " + str(e))
def test_decipher_hill():
A = Matrix(2, 2, [1, 2, 3, 5])
assert decipher_hill("CFIV", A) == "ABCD"
A = Matrix(2, 2, [1, 0, 0, 1])
assert decipher_hill("ABCD", A) == "ABCD"
assert decipher_hill("ABCD", A, symbols="ABCD") == "ABCD"
A = Matrix(2, 2, [1, 2, 3, 5])
assert decipher_hill("CBAB", A, symbols="ABCD") == "ABCD"
assert decipher_hill("CB", A, symbols="ABCD") == "AB"
# n does not need to be a multiple of k
assert decipher_hill("CFA", A) == "ABAA"
def test_decipher_hill():
A = Matrix(2, 2, [1, 2, 3, 5])
assert decipher_hill("CFIV", A) == "ABCD"
A = Matrix(2, 2, [1, 0, 0, 1])
assert decipher_hill("ABCD", A) == "ABCD"
assert decipher_hill("ABCD", A, symbols="ABCD") == "ABCD"
A = Matrix(2, 2, [1, 2, 3, 5])
assert decipher_hill("CBAB", A, symbols="ABCD") == "ABCD"
assert decipher_hill("CB", A, symbols="ABCD") == "AB"
# n does not need to be a multiple of k
assert decipher_hill("CFA", A) == "ABAA"
# Hill Cipher
# over the hill - icectf-2016
# can also use sage like in this other chall: https://github.com/ctfs/write-ups-2015/tree/master/ghost-in-the-shellcode-2015/crypto/nikoli
from sympy.crypto.crypto import encipher_hill, decipher_hill
from sympy import Matrix
alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789_{}"
ciphertext = "7Nv7}dI9hD9qGmP}CR_5wJDdkj4CKxd45rko1cj51DpHPnNDb__EXDotSRCP8ZCQ"
matrix = Matrix([[54, 53, 28, 20, 54, 15, 12, 7],
[32, 14, 24, 5, 63, 12, 50, 52],
[63, 59, 40, 18, 55, 33, 17, 3],
[63, 34, 5, 4, 56, 10, 53, 16],
[35, 43, 45, 53, 12, 42, 35, 37],
[20, 59, 42, 10, 46, 56, 12, 61],
[26, 39, 27, 59, 44, 54, 23, 56],
[32, 31, 56, 47, 31, 2, 29, 41]])
print decipher_hill(ciphertext, matrix, alphabet)
#pip install SymPy
from sympy.crypto.crypto import encipher_hill, decipher_hill
from sympy import Matrix
def getMatrix(msg):
matrix=[[0 for x in range(3)] for y in range(3)]
k=0
for i in range(3):
for j in range(3):
matrix[i][j] = ord(msg[k])%65
k+=1
return matrix
message=input("Enter text: ")
key = Matrix(getMatrix("GYBNQKURP"))
cipher = encipher_hill(message, key)
print("Ciphered: ", cipher)
print("Deciphered:", decipher_hill(cipher, key))
from sympy.crypto.crypto import encipher_hill, decipher_hill
from sympy import Matrix
key = Matrix([[1, 2], [3, 5]])
a = raw_input("Write the pure text: ")
b = encipher_hill(a, key)
c = decipher_hill(b, key)
print b
print c
def hill(msg, key, **kwargs):
et = encipher_hill(msg, key, symbols=symbols, pad="0")
dt = decipher_hill(et, key, symbols=symbols)
return et, dt
