import base64
import hashlib


def getSign(params):
    # sv传120
    key = [55, 146, 68, 104, 165, 61, 204, 127, 187, 15, 217, 136, 238, 154, 233, 90]
    arg0 = [56, 48, 51, 48, 54, 102, 52, 51, 55, 48, 98, 51, 57, 102, 100, 53, 54, 51, 48, 97, 100, 48, 53, 50, 57, 102,
            55, 55, 97, 100, 98, 54]

    sign = "functionId=" + params.get("functionId") + "&body=" + params.get("body") + "&uuid=" + params.get("uuid") \
           + "&client=" + params.get("client") + "&clientVersion=" + params.get("clientVersion") + "&st=" + str(
        params.get("st")) \
           + "&sv=" + str(params.get("sv"))
    arg2 = bytearray(sign, 'utf-8')
    # print([x for x in arg2])
    ss = [None] * len(arg2)
    for i in range(len(arg2)):
        R0 = arg2[i]
        R2 = key[i & 15]
        R4 = arg0[i & 7]
        R0 = ((R2 ^ R0) ^ R4) + R2
        R2 = (R2 ^ R0)
        R1 = arg0[i & 7]
        R2 = (R2 ^ R1)
        # print(R2)
        ss[i] = R2
    m = hashlib.md5()
    m.update(base64.b64encode(bytes(i % 256 for i in ss)))
    return str(params.get("st")), m.hexdigest(), str(params.get("sv"))
    # return "st=" + str(params.get("st")) + "&sign=" + m.hexdigest() + "&sv=" + str(params.get("sv"))


def generateSign():
    params = {
        "st": 1648992407201,  # 毫秒级时间戳
        "sv": "120",
        "functionId": 'serverConfig',
        "uuid": '947934e94e0cb9e4',
        "client": "android",
        "clientVersion": '10.4.6',
        # "body": '{"to":"https://plogin.m.jd.com/jd-mlogin/static/html/appjmp_blank.html"}'
        "body": '{}'
    }
    # return getSign(params)
    print(getSign(params))
    # print("正确结果:st=1648992407201&sign=474c50af52257126ae65700b825bdf4c&sv=120")


if __name__ == '__main__':
    generateSign()