SecurePacket.py 文件源码

def sign(self, data):
        """
Sign data (as str) by KID key.
Return signature as str."""
        if self.zAES:
            data = [ord(x) for x in data]
            sLB = len(data) % self.BS
            if(sLB > 0 or len(data) == 0):
                data += [0x80] + [0]*(self.BS-sLB-1)
                xorkey = self.xorKey2
            else:
                xorkey = self.xorKey1
            for i in xrange(self.BS):
                data[-self.BS+i] ^= ord(xorkey[i])
            cipher = AES.new(self.keyval, AES.MODE_CBC, IV='\0'*16)
            data = ''.join([chr(x) for x in data])
            sig = cipher.encrypt(data)[-self.BS:]
            return sig[:self.TlenB]
        else:
            padlen = len(data) % self.BS
            if padlen > 0:
                padlen = self.BS - padlen
            sig = self.cipher(data + '\0'*padlen, True)
            return sig[-self.BS:]