def obtainKey(self, request, cert):
key = self.decrypt(algs.int_repr(request['Key']))
signature = self.decrypt(algs.int_repr(request['Signature']))
length = request['Length']
verified = self.verifyKey(key, signature, cert)
if verified:
self.__obtained_keys.append(
{'Key': algs.hex_repr(key, length), 'From': cert})
return {
'verified': verified,
'key': algs.hex_repr(key, length)
}
def generateKeyToAbonent(self, length, cert):
k = random.randint(2**(length - 1), 2**length)
self.__generated_keys.append(
{'Key': algs.hex_repr(k, length), 'To': cert})
e = cert['Public Key Info']['Exponent']
n = algs.int_repr(cert['Public Key Info']['Modulus'])
l = cert['Public Key Info']['Modulus Length']
k1 = self.encrypt(k, cert)
s1 = self.encrypt(self.signKey(k, length), cert)
return {
'Key': algs.hex_repr(k1, l),
'Length': length,
'Signature': algs.hex_repr(s1, l)
}
def getCertificate(self):
return {
'Subject': self.__name,
'Issuer': 'Grubian Evhen',
'Public Key Info': {
'Algorithm': 'PKCS #1 RSA with md5',
'Modulus Length': self.__length,
'Exponent': self.__public_key[0],
'Modulus': algs.hex_repr(self.__public_key[1], self.__length)
}
}
def sign(self, msg):
msg_raw = msg
if type(msg) == str:
msg = msg.encode('utf-8')
md5 = hashlib.md5(msg)
msg = md5.digest()
msg = int.from_bytes(msg, 'big')
return {
'Message': msg_raw,
'Signature': algs.hex_repr(pow(msg, self.__private_key, self.__public_key[1]), self.__length)
}
