小红书星火&蒲公英参数解密

import base64
import hashlib
import json
import random


def custom_base64_encode(input_str):
    """
    完全模拟原JS代码的自定义Base64编码函数
    """

    # 第一步：模拟JS中的UTF-8编码函数
    def utf8_encode(s):
        s = s.replace('\r\n', '\n')
        result = []
        for char in s:
            code = ord(char)
            if code < 128:
                result.append(code)
            elif code < 2048:
                result.append((code >> 6) | 192)
                result.append((code & 63) | 128)
            else:
                result.append((code >> 12) | 224)
                result.append(((code >> 6) & 63) | 128)
                result.append((code & 63) | 128)
        return bytes(result)

    # 第二步：模拟JS中的Base64编码函数
    base64_chars = "A4NjFqYu5wPHsO0XTdDgMa2r1ZQocVte9UJBvk6/7=yRnhISGKblCWi+LpfE8xzm3"

    # 执行UTF-8编码
    data = utf8_encode(input_str)
    data_len = len(data)
    result = []
    i = 0

    while i < data_len:
        # 处理第一个字节
        byte1 = data[i]
        i += 1

        # 处理第二个字节（可能不存在）
        byte2 = data[i] if i < data_len else None
        if byte2 is not None:
            i += 1

        # 处理第三个字节（可能不存在）
        byte3 = data[i] if i < data_len else None
        if byte3 is not None:
            i += 1

        # 计算Base64索引
        index1 = byte1 >> 2

        if byte2 is None:
            index2 = (byte1 & 3) << 4
            index3 = 64  # 特殊标记，表示缺失
            index4 = 64  # 特殊标记，表示缺失
        else:
            index2 = ((byte1 & 3) << 4) | (byte2 >> 4)

            if byte3 is None:
                index3 = ((byte2 & 15) << 2)
                index4 = 64  # 特殊标记，表示缺失
            else:
                index3 = ((byte2 & 15) << 2) | (byte3 >> 6)
                index4 = byte3 & 63

        # 添加Base64字符
        result.append(base64_chars[index1])
        result.append(base64_chars[index2])

        if index3 != 64:
            result.append(base64_chars[index3])

        if index4 != 64:
            result.append(base64_chars[index4])

    return ''.join(result)


def header_xs_common():
    random_number = random.randint(-500000000, 500000000)
    d = {"s0": 5, "s1": "", "x0": "1", "x1": "4.1.4", "x2": "Windows", "x3": "mcc-shell", "x4": "1.0.17",
                 "x5": "19897fff3c2se24gfzep1lwgob15g6e8ygzozr0tc50000354746", "x6": "", "x7": "",
                 "x8": "I38rHdgsjopgIvesdVwgIC+oIELmBZ5e3VwXLgFTIxS3bqwErFeexd0ekncAzMFYnqthIhJed9MDKutRI3KsYorWHPtGrbV0P9WfIi/eWc6eYqtyQApPI37ekmR6QL+5Ii6sdneeSfqYHqwl2qt5B0DBIx+PGDi/sVtkIxdsxuwr4qtiIhuaIE3e3LV0I3VTIC7e0utl2ADmsLveDSKsSPw5IEvsiVtJOqw8BuwfPpdeTFWOIx4TIiu6ZPwrPut5IvlaLbgs3qtxIxes1VwHIkumIkIyejgsY/WTge7eSqte/D7sDcpipedeYrDtIC6eDVw2IENsSqtlnlSuNjVtIvoekqt3cZ7sVo4gIESyIhE4+9DUIvzy4I8OIic7ZPwAIviX4o/sDLds6PwVIC7eSd7e0/k4IEveTZPMtVwUIids3s/sxZNeiVtbcUeeYVwvIvTGa05eSVwCgfosfPwoIxltIxZSouwOgVwpsr4heU/e6LveYPwfICNs1roeTFuMIiNeWL0sxdh5IiJsxPw9IhR9JPwJPutWIv3e1Vt1IiNs1qw5Ih/sYqtSGqwymqwDIvIkICptOjMS4n7sYPtVIiRzIh3sWPwKgIzrcnNsYUmuIihLqutzZPwEIv3eVPtk+pdeTzAsiMmLIiAsx7esTutycPwOIvoeSPwvIiJex0ImICdeS9NeSqt3Ixvs1Pw64B8qIkWyIvgsxFOekgveDS6edVtNIkF1I3Q6JuwCIkZ+I3KeWjSHarNekPwFIxh68qwZBfde1s0s1qtUqutdIkIaICSdoVtK+uwbIx7s0Wde1qwVnPtzIETgoutII3qCb/qcIiesW9OsiFveiqw2+PttIiWJI33sSVtYIEoeDpmTIvkDoWzKIvYrICoejPwLLPt2+qtUI3ruIhJsdA0e1qw9pSqRICG58ut2ZqtNIxhJIxTcIkbQIhNe3F3sVMMiHuwgICI6qVwQBVwTIh0eVMH/Iihvad/edPt7bVtmgWrNBgHVIkZI/VwoIk5s6IYLIkMNnPwhIkTnwqt+HVtKIhVVICk5ICQzZPwUIkZcICvsxPwWZZM7IvZcIvNs09KskVw+IvE7IhWh/crcICROc/MUICKedbvsDutKIhOsfPwtIEltI3veYqteI3RK",
                 "x9": random_number, "x10": 0, "x11": "lite"}

    # 1. JSON序列化（等效stringify_default）
    json_str = json.dumps(d, ensure_ascii=False, separators=(',', ':'))

    # 2. UTF-8编码处理（等效encodeUtf8）
    # 特别注意：处理\r\n转\n（与JS行为一致）
    utf8_bytes = json_str.replace('\r\n', '\n').encode('utf-8')

    # 自定义字母表（示例：将大小写字母互换）
    custom_alphabet = b"ZmserbBoHQtNP+wOcza/LpngG8yJq42KWYj0DSfdikx3VT16IlUAFM97hECvuRX5"

    # 创建转换表
    original_alphabet = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
    translation_table = bytes.maketrans(original_alphabet, custom_alphabet)

    # 3. Base64编码（等效b64Encode）
    base64_str = base64.b64encode(utf8_bytes).translate(translation_table).decode('ascii')

    return base64_str


def header_xs(o, r, e, a, t):
    """
    加密x-s
    :param o: 时间戳，x-t的内容
    :param r: test死值
    :param e: 接口url 例：/api/cas/customer/web/model-ticket
    :param a: 是否有json报文
    :param t: json报文
    :return: 加密结果
    """

    # 构建输入字符串
    parts = [
        str(o),
        str(r),
        str(e),
        json.dumps(t, ensure_ascii=False, separators=(',', ':')) if a else ""
    ]
    input_str = "".join(parts)
    # 计算MD5
    md5_hash = hashlib.md5(input_str.encode('utf-8')).hexdigest()

    # 使用自定义Base64编码
    return custom_base64_encode(md5_hash) + "3"


# 使用示例
if __name__ == "__main__":
    json_data = {"applyDataType":2,"pageIndex":1,"pageSize":20}
    # 13位时间戳
    o = "1760001347966"
    # 固定数据
    r = 'test'
    # 接口地址
    e = '/api/mcc/apply/list'
    # 是否携带有json请求体参数
    a = True
    # 有的话传json，没有传None
    t = json_data

    result = header_xs(o, r, e, a, t)
    print("x-s结果:", result)
    result = header_xs_common()
    print("x-s-common结果:", result)