mirror of
https://github.com/SystemRage/py-kms.git
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106 lines
3.7 KiB
Python
106 lines
3.7 KiB
Python
#!/usr/bin/env python3
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import hashlib
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import hmac
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import struct
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import aes
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from kmsBase import kmsBase
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from kmsRequestV5 import kmsRequestV5
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from structure import Structure
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class kmsRequestV6(kmsRequestV5):
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class DecryptedResponse(Structure):
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class Message(Structure):
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commonHdr = ()
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structure = (
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('response', ':', kmsBase.kmsResponseStruct),
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('keys', '16s'),
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('hash', '32s'),
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('hwid', '8s'),
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('xorSalts', '16s'),
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)
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commonHdr = ()
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structure = (
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('message', ':', Message),
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('hmac', '16s'),
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)
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key = bytearray([ 0xA9, 0x4A, 0x41, 0x95, 0xE2, 0x01, 0x43, 0x2D, 0x9B, 0xCB, 0x46, 0x04, 0x05, 0xD8, 0x4A, 0x21 ])
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v6 = True
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ver = 6
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def encryptResponse(self, request, decrypted, response):
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randomSalt = self.getRandomSalt()
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result = hashlib.sha256(randomSalt).digest()
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SaltC = bytearray(request['message']['salt'].encode('latin-1'))
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DSaltC = bytearray(decrypted['salt'].encode('latin-1'))
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randomStuff = bytearray(16)
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for i in range(0,16):
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randomStuff[i] = (SaltC[i] ^ DSaltC[i] ^ randomSalt[i]) & 0xff
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# XorSalts
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XorSalts = bytearray(16)
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for i in range (0, 16):
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XorSalts[i] = (SaltC[i] ^ DSaltC[i]) & 0xff
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message = self.DecryptedResponse.Message()
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message['response'] = response
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message['keys'] = randomStuff
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message['hash'] = result
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message['xorSalts'] = XorSalts
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message['hwid'] = self.config['hwid']
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# SaltS
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SaltS = self.getRandomSalt()
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moo = aes.AESModeOfOperation()
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moo.aes.v6 = True
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decry = moo.decrypt(SaltS, 16, moo.ModeOfOperation["CBC"], self.key, moo.aes.KeySize["SIZE_128"], SaltS)
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# DSaltS
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DSaltS = bytearray(decry)
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# HMacMsg
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HMacMsg = bytearray(16)
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for i in range(0,16):
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HMacMsg[i] = (SaltS[i] ^ DSaltS[i]) & 0xff
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HMacMsg.extend(str(message).encode('latin-1'))
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# HMacKey
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requestTime = decrypted['request']['requestTime']
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HMacKey = self.getMACKey(requestTime)
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HMac = hmac.new(HMacKey, HMacMsg, hashlib.sha256)
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digest = HMac.digest()
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responsedata = self.DecryptedResponse()
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responsedata['message'] = message
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responsedata['hmac'] = digest[16:]
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padded = aes.append_PKCS7_padding(str(responsedata).encode('latin-1'))
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mode, orig_len, crypted = moo.encrypt(padded, moo.ModeOfOperation["CBC"], self.key, moo.aes.KeySize["SIZE_128"], SaltS)
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return SaltS.decode('latin-1').encode('latin-1'), crypted
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def getMACKey(self, t):
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c1 = 0x00000022816889BD
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c2 = 0x000000208CBAB5ED
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c3 = 0x3156CD5AC628477A
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i1 = (t // c1) & 0xFFFFFFFFFFFFFFFF
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i2 = (i1 * c2) & 0xFFFFFFFFFFFFFFFF
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seed = (i2 + c3) & 0xFFFFFFFFFFFFFFFF
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sha256 = hashlib.sha256()
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sha256.update(struct.pack("<Q", seed))
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digest = sha256.digest()
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return digest[16:]
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