Python impacket.dcerpc.v5.drsuapi.removeDESLayer() Examples

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Example #1
Source File: raiseChild.py    From Slackor with GNU General Public License v3.0 5 votes vote down vote up 
def __decryptHash(self, record, prefixTable=None):
        logging.debug('Decrypting hash for user: %s' % record['pmsgOut']['V6']['pNC']['StringName'][:-1])
        rid = 0
        LMHash = None
        NTHash = None
        for attr in record['pmsgOut']['V6']['pObjects']['Entinf']['AttrBlock']['pAttr']:
            try:
                attId = drsuapi.OidFromAttid(prefixTable, attr['attrTyp'])
                LOOKUP_TABLE = self.ATTRTYP_TO_ATTID
            except Exception as e:
                logging.debug('Failed to execute OidFromAttid with error %s, fallbacking to fixed table' % e)
                # Fallbacking to fixed table and hope for the best
                attId = attr['attrTyp']
                LOOKUP_TABLE = self.NAME_TO_ATTRTYP
            if attId == LOOKUP_TABLE['dBCSPwd']:
                if attr['AttrVal']['valCount'] > 0:
                    encrypteddBCSPwd = ''.join(attr['AttrVal']['pAVal'][0]['pVal'])
                    encryptedLMHash = drsuapi.DecryptAttributeValue(self.__drsr, encrypteddBCSPwd)
                else:
                    LMHash = LMOWFv1('', '')
            elif attId == LOOKUP_TABLE['unicodePwd']:
                if attr['AttrVal']['valCount'] > 0:
                    encryptedUnicodePwd = b''.join(attr['AttrVal']['pAVal'][0]['pVal'])
                    encryptedNTHash = drsuapi.DecryptAttributeValue(self.__drsr, encryptedUnicodePwd)
                else:
                    NTHash = NTOWFv1('', '')
            elif attId == LOOKUP_TABLE['objectSid']:
                if attr['AttrVal']['valCount'] > 0:
                    objectSid = b''.join(attr['AttrVal']['pAVal'][0]['pVal'])
                    rid = unpack('<L', objectSid[-4:])[0]
                else:
                    raise Exception('Cannot get objectSid for %s' % record['pmsgOut']['V6']['pNC']['StringName'][:-1])

        if LMHash is None:
            LMHash = drsuapi.removeDESLayer(encryptedLMHash, rid)
        if NTHash is None:
            NTHash = drsuapi.removeDESLayer(encryptedNTHash, rid)
        return rid, hexlify(LMHash), hexlify(NTHash)