def decryptParamsAndCheckAdmin(encryptedParams):
cipher = challenge10.CBC(AES.new(key, AES.MODE_ECB), key)
paddedParams = cipher.decrypt(encryptedParams)
params = challenge15.unpadPKCS7(paddedParams)
if any([x > 127 for x in params]):
raise ValueError(params)
return params.find(b';admin=true;') != -1
def decryptParamsAndCheckAdmin(encryptedParams):
cipher = challenge10.CBC(AES.new(key, AES.MODE_ECB), key)
paddedParams = cipher.decrypt(encryptedParams)
params = challenge15.unpadPKCS7(paddedParams)
if any([x > 127 for x in params]):
raise ValueError(params)
return params.find(b';admin=true;') != -1
def padding_oracle(iv, s):
cipher = challenge10.CBC(AES.new(key, AES.MODE_ECB), iv)
paddedT = cipher.decrypt(s)
try:
t = challenge15.unpadPKCS7(paddedT)
except ValueError:
return False
return True
def decryptParamsAndCheckAdmin(encryptedParams):
cipher = challenge10.CBC(AES.new(key, AES.MODE_ECB), iv)
paddedParams = cipher.decrypt(encryptedParams)
params = challenge15.unpadPKCS7(paddedParams)
return params.find(b';admin=true;') != -1
def decipher(iv, s, padding_oracle):
knownP = b''
for i in range(len(s) // 16):
st = s if i == 0 else s[:-i * 16]
knownP = decipher_last_block(iv, st, padding_oracle) + knownP
return challenge15.unpadPKCS7(knownP)
def decryptParamsAndCheckAdmin(encryptedParams):
cipher = challenge18.CTR(AES.new(key, AES.MODE_ECB), nonce)
paddedParams = cipher.decrypt(encryptedParams)
params = challenge15.unpadPKCS7(paddedParams)
return params.find(b';admin=true;') != -1
def decrypt(self, key, iv, encryptedMessage):
cipher = AES.new(key, AES.MODE_CBC, iv)
return challenge15.unpadPKCS7(cipher.decrypt(encryptedMessage)).decode('ascii')
