BreizhHardware/chiff-affine
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End of the project

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Félix MARQUET
2022-03-27 14:01:22 +02:00
parent 6f450e38e5
commit 24a2a0ae0c
8 changed files with 22 additions and 8 deletions
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__pycache__/crypt_and_decrypt.cpython-38.pyc
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2
crypt_and_decrypt.py
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@@ -32,6 +32,7 @@ def chiffrementAffineByte(data: bytes, keya: int, keyb: int) -> bytes:
y = (keya*x+keyb)%256 y = (keya*x+keyb)%256
return bytes([alphabet[y]]) return bytes([alphabet[y]])
def inverse(a): def inverse(a):
""" Renvoie l'inverse du module de a et x par 256 """ Renvoie l'inverse du module de a et x par 256
""" """
@@ -40,6 +41,7 @@ def inverse(a):
x += 1 x += 1
return x return x
def dechiffrementAffineByte(data: bytes, keya: int, keyb: int) -> bytes: def dechiffrementAffineByte(data: bytes, keya: int, keyb: int) -> bytes:
""" Renvoie le byte data décrypté avec le chiffrement affine """ Renvoie le byte data décrypté avec le chiffrement affine
""" """

3
find_key.py
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@@ -55,6 +55,7 @@ def findKeywrite(data: bytes, dataout: bytes, filenameOut = 'result'):
fdout.write(str(keyb)) fdout.write(str(keyb))
fdout.write("\n") fdout.write("\n")
def findKeyList(data: bytes, dataout: bytes): def findKeyList(data: bytes, dataout: bytes):
"""Renvoie la liste des couples de clé possible pour que data soit égale à dataout. """Renvoie la liste des couples de clé possible pour que data soit égale à dataout.
""" """
@@ -68,6 +69,7 @@ def findKeyList(data: bytes, dataout: bytes):
L.append(t) L.append(t)
return L return L
def comparKey(L: list, M: list) -> tuple: def comparKey(L: list, M: list) -> tuple:
"""Compare les couples de clé valeur et renvoie le couple commun aux 2 listes M et L. """Compare les couples de clé valeur et renvoie le couple commun aux 2 listes M et L.
""" """
@@ -75,3 +77,4 @@ def comparKey(L: list, M: list) -> tuple:
for y in range(len(M)): for y in range(len(M)):
if L[i] == M[y]: if L[i] == M[y]:
return L[i] return L[i]

18
jeudetest.py
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@@ -3,19 +3,21 @@ from find_key import *
#print(sortbyteFreq(byteFreq("data"))) print(sortbyteFreq(byteFreq("data")))
#findKeywrite(b'\xaa', b'\x20', "keyoutspace") findKeywrite(b'\xaa', b'\x20', "keyoutspace")
#findKeywrite(b'\x31', b'\x65', "keyoute") findKeywrite(b'\x31', b'\x65', "keyoute")
#print(findKeyList(b'\xaa', b'\x20')) #print(findKeyList(b'\xaa', b'\x20'))
#print(comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65'))) print(comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65')))
#cryptByteFile('tescrypt.txt', 1, 3, "resulttest2") #cryptByteFile('tescrypt.txt', 1, 3, "resulttest2")
#cryptByteFile('data', 1, 3, 'resultcryptdata') #cryptByteFile('data', 1, 3, 'resultcryptdata')
#cryptByteFile('monkey.jpg', 1, 3) #cryptByteFile('monkey.jpg', 1, 3)
#decryptByteFile('resulttest2', 1, 3, "decryptresult2") #decryptByteFile('resulttest2', 1, 3, "decryptresult2")
#decryptByteFile('resultcryptdata', 1, 3, 'resultdecryptdata') #decryptByteFile('resultcryptdata', 1, 3, 'resultdecryptdata')
decryptByteFile('data', #decryptByteFile('data',
comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65'))[0], # comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65'))[0],
comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65'))[1], # comparKey(findKeyList(b'\xaa', b'\x20'), findKeyList(b'\x31', b'\x65'))[1],
"dataDecrypted") # "dataDecrypted")
#cryptByteFile('enemy-from-the-series-arcane-league-of-legends.mp3', 45, 76, 'enemyCrypted') #cryptByteFile('enemy-from-the-series-arcane-league-of-legends.mp3', 45, 76, 'enemyCrypted')
#decryptByteFile('enemyCrypted', 45, 76, 'enemyDeCyted.mp3') #decryptByteFile('enemyCrypted', 45, 76, 'enemyDeCyted.mp3')
cryptByteFile('../enemy-from-the-series-arcane-league-of-legends.mp3', 45, 85, '../enemyCrypted')
decryptByteFile('../enemyCrypted', 45, 85, '../enemyDeCrypted')

7
jeudetestdemo.py Normal file
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@@ -0,0 +1,7 @@
from crypt_and_decrypt import *
from find_key import *
cryptByteFile('../demo.mp3', 45, 85, '../demoCrypted.mp3')
print('Crypted')
decryptByteFile('../demoCrypted.mp3', 45, 85, '../demoDeCrypted.mp3')
print('Decrypted')