py3-kms upload

py3-kms/kmsRequestV4.py

@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+
+import binascii
+import struct
+import time
+import logging
+
+from kmsBase import kmsBase
+from structure import Structure
+from aes import AES
+from formatText import shell_message, justify, byterize
+
+
+# v4 AES Key
+key = bytearray([0x05, 0x3D, 0x83, 0x07, 0xF9, 0xE5, 0xF0, 0x88, 0xEB, 0x5E, 0xA6, 0x68, 0x6C, 0xF0, 0x37, 0xC7, 0xE4, 0xEF, 0xD2, 0xD6])
+
+# Xor Buffer
+def xorBuffer(source, offset, destination, size):
+        for i in range(0, size):
+                destination[i] ^= source[i + offset]
+
+class kmsRequestV4(kmsBase):
+        class RequestV4(Structure):
+                commonHdr = ()
+                structure = (
+                        ('bodyLength1', '<I'),
+                        ('bodyLength2', '<I'),
+                        ('request',     ':', kmsBase.kmsRequestStruct),
+                        ('hash',        '16s'),
+                        ('padding',     ':'),
+                )
+
+        class ResponseV4(Structure):
+                commonHdr = ()
+                structure = (
+                        ('bodyLength1', '<I=len(response) + len(hash)'),
+                        ('unknown',     '!I=0x00000200'),
+                        ('bodyLength2', '<I=len(response) + len(hash)'),
+                        ('response',    ':', kmsBase.kmsResponseStruct),
+                        ('hash',        '16s'),
+                        ('padding',     ':'),
+                )
+
+        def executeRequestLogic(self):
+                requestData = self.RequestV4(self.data)
+
+                response = self.serverLogic(requestData['request'])
+
+                thehash = self.generateHash(bytearray(str(response).encode('latin-1'))) #*2to3*
+
+                self.responseData = self.generateResponse(response, thehash)
+
+                time.sleep(1) # request sent back too quick for Windows 2008 R2, slow it down.
+
+        def generateHash(self, message):
+                """
+                The KMS v4 hash is a variant of CMAC-AES-128. There are two key differences:
+                * The 'AES' used is modified in particular ways:
+                  * The basic algorithm is Rjindael with a conceptual 160bit key and 128bit blocks.
+                    This isn't part of the AES standard, but it works the way you'd expect.
+                    Accordingly, the algorithm uses 11 rounds and a 192 byte expanded key.
+                * The trailing block is not XORed with a generated subkey, as defined in CMAC.
+                  This is probably because the subkey generation algorithm is only defined for
+                  situations where block and key size are the same.
+                """
+                aes = AES()
+
+                messageSize = len(message)
+                lastBlock = bytearray(16) 
+                hashBuffer = bytearray(16)
+
+                # MessageSize / Blocksize.
+                j = messageSize >> 4
+
+                # Remainding bytes.
+                k = messageSize & 0xf
+
+                # Hash.
+                for i in range(0, j):
+                        xorBuffer(message, i << 4, hashBuffer, 16)
+                        hashBuffer = bytearray(aes.encrypt(hashBuffer, key, len(key)))
+
+                # Bit Padding.
+                ii = 0
+                for i in range(j << 4, k + (j << 4)):
+                        lastBlock[ii] = message[i]
+                        ii += 1
+                lastBlock[k] = 0x80
+
+                xorBuffer(lastBlock, 0, hashBuffer, 16)
+                hashBuffer = bytearray(aes.encrypt(hashBuffer, key, len(key)))
+
+                return hashBuffer #*2to3*
+
+        def generateResponse(self, responseBuffer, thehash):
+                bodyLength = len(responseBuffer) + len(thehash)
+                response = self.ResponseV4()
+                response['response'] = responseBuffer
+                response['hash'] = thehash.decode('latin-1') #*2to3*
+                response['padding'] = self.getResponsePadding(bodyLength).decode('latin-1') #*2to3*
+                
+                ## Debug stuff.
+                shell_message(nshell = 16)
+                response = byterize(response)
+                logging.debug("KMS V4 Response: \n%s\n" % justify(response.dump(print_to_stdout = False)))
+                logging.debug("KMS V4 Response Bytes: \n%s\n" % justify(binascii.b2a_hex(str(response).encode('latin-1')).decode('utf-8'))) #*2to3*
+                        
+                return str(response)
+
+        def getResponse(self):
+                return self.responseData
+
+        def generateRequest(self, requestBase):
+                thehash = self.generateHash(bytearray(str(requestBase).encode('latin-1'))) #*2to3*
+
+                bodyLength = len(requestBase) + len(thehash)
+
+                request = kmsRequestV4.RequestV4()
+                request['bodyLength1'] = bodyLength
+                request['bodyLength2'] = bodyLength
+                request['request'] = requestBase
+                request['hash'] = thehash.decode('latin-1') #*2to3*
+                request['padding'] = self.getResponsePadding(bodyLength).decode('latin-1') #*2to3*
+                
+                ## Debug stuff.
+                shell_message(nshell = 10)
+                request = byterize(request)
+                logging.debug("Request V4 Data: \n%s\n" % justify(request.dump(print_to_stdout = False)))
+                logging.debug("Request V4: \n%s\n" % justify(binascii.b2a_hex(str(request).encode('latin-1')).decode('utf-8'))) #*2to3*
+                                
+                return request