#coding=utf-8
import Crypto.Hash
import Crypto.PublicKey.RSA
import Crypto.Signature.PKCS1_v1_5

import uuid
import platform
import base64
import hashlib
import os

XorKey = [0xB2, 0x09, 0xBB, 0x55, 0x93, 0x83, 0x03, 0x24]

def enc(src):
    j, result = 0, ""
    for s in src:
        result = result + hex(ord(s) ^ (XorKey[j]))[2:]
        j = (j + 1) % 8
    return result

def getMac():
    sysstr = platform.system()
    if (sysstr == "Windows"):
        import winreg
        key = winreg.OpenKey(
            winreg.HKEY_LOCAL_MACHINE,
            "SOFTWARE\\Microsoft\\Cryptography",
            0,
            winreg.KEY_READ | winreg.KEY_WOW64_64KEY
        )
        result = winreg.QueryValueEx(key, "MachineGuid")
        mac = result[0]
    else:
        mac = ':'.join(['{:02x}'.format((uuid.getnode() >> i) & 0xff) for i in range(0, 8 * 6, 8)][::-1])

    path = '/auth/kaohe/v2/'
    mac += 'ZZLY[' + path + ']20190325'
    mac = enc(mac)
    mac = base64.b64encode(mac.encode())
    mac = hashlib.sha256(mac).hexdigest()
    return mac

def checkLicence():
    pub_key = """-----BEGIN RSA PUBLIC KEY-----
    MIGJAoGBAMhqydgWZUV7qy96aGTY6i/pGC5mC8AyjvwIwoH2zE6hi5MQsW5cpOLS
    d2VNhfi2ypg19w3Z2sd248X/fc4lGwDwP8/fXNoRtVBDR/3F/+WlaK9beFIyp5J4
    Fa2XHj5lOiCjLoJpzehE2Dguv+3xORJn10oGAHQhXxFjdWEt5xBBAgMBAAE=
    -----END RSA PUBLIC KEY-----"""

    mac = getMac()

    with open(os.path.dirname(__file__) + "/../licence", 'rb') as x:
        licence = x.read()

    d_rsa = Crypto.PublicKey.RSA.importKey(pub_key)
    verifer = Crypto.Signature.PKCS1_v1_5.new(d_rsa)
    msg_hash = Crypto.Hash.SHA256.new()
    msg_hash.update(mac.encode('utf-8'))
    return verifer.verify(msg_hash, base64.decodebytes(licence))