卡巴斯基免费版的Windows安装包下载URL获取

下载页面

目前，KFA 仅通过 Kaspersky Global 站点提供，且不公开提供下载页面。

下载页面 URL 为：

https://www.kaspersky.com/downloads/free-antivirus

API

在 2024-02-17，此页面会通过一个 API 请求动态获取安装包下载链接：

快速请求（使用浏览器访问此 API 可绕过反爬虫）

https://api-router.kaspersky-labs.com/downloads/search/v3/b2c?productcodes=5003617&businesspurposes=Update&licensetiers=Free&sites=https%3A%2F%2Fwww.kaspersky.com&sites=https%3A%2F%2Fwww.kaspersky.com%2Fcarribean&sites=https%3A%2F%2Fwww.kaspersky.com%2Fisrael&sites=https%3A%2F%2Fwww.kaspersky.com%2Fsouth-east-asia&sites=https%3A%2F%2Fwww.kaspersky.com%2Findonesia&sites=https%3A%2F%2Fwww.kaspersky.com%2Fthe-european-union&sites=https%3A%2F%2Fwww.kaspersky.com%2Flatvia&sites=https%3A%2F%2Fwww.kaspersky.com%2Flithuania&sites=https%3A%2F%2Fwww.kaspersky.com%2Festonia&sites=https%3A%2F%2Fwww.kaspersky.com%2Funited-kingdom&sites=https%3A%2F%2Fwww.kaspersky.com%2Fcalifornia&sites=https%3A%2F%2Fwww.kaspersky.com%2Fbrazil

它会返回一个包含各操作系统安装包下载链接的 JSON 对象。

观察参数，可以构建一个这样的请求，使其搜索简体中文版的免费安装包：

快速请求

https://api-router.kaspersky-labs.com/downloads/search/v3/b2c?productcodes=5003617&businesspurposes=Update&licensetiers=Free&sites=https%3A%2F%2Fwww.kaspersky.com.cn

题外话，对于 KSOS，有：

https://api-router.kaspersky-labs.com/downloads/search/v3/b2c?productcodes=2911399&businesspurposes=Update&licensetiers=KSOS&sites=https%3A%2F%2Fwww.kaspersky.com.cn

API（已弃用）

曾经，此页面还会在下载前请求另一个 API：

fetch("https://api-router.kaspersky-labs.com/pcp/PdcProxy/downloadurl", {
  referrer: "https://www.kaspersky.com/downloads/free-antivirus",
  body: '{"ApplicationId":[2269],"localization":["en-INT"],"Platform":"Windows","CppId":39971,"VersionNumber":"21.16.6.467","customizationParams":{"StartupScenario":"Free"}}',
  method: "POST",
  mode: "cors",
  credentials: "include",
});

但此 API 似乎已被废弃。

KFA 激活码

在一些情况下，安装的 KFA 仍然会请求激活码：

简体中文版：3SXCM-M9RJM-6985N-PWKP7或A23B5-44EXM-85MVF-KM2GQ

英文版：ZM4YW-FUTDY-W9B62-GSK26

自动化

# Install Kaspersky Free Antivirus for Windows
# This script requests for free antivirus installer from free-antivirus download page API and install it with a fake activation code.
# https://www.kaspersky.com/downloads/free-antivirus
import os
import subprocess
import tempfile

import requests

ALLOWED_LOCALES = ["en-INT", "zh-Hans-CN"]

# The FAKE_ACTIVATION_CODE skips the Kaspersky account login process when first run KFA.
# The code is hardcoded in the Kaspersky activation dll file and used only for free versions.
# We are only sure about codes for the two locales now.
FAKE_ACTIVATION_CODE = {
    "en-INT": "ZM4YW-FUTDY-W9B62-GSK26",
    "zh-Hans-CN": "3SXCM-M9RJM-6985N-PWKP7",
}

SITES = {
    "en-INT": "https://www.kaspersky.com",
    "zh-Hans-CN": "https://www.kaspersky.com.cn",
}


def get_installer_url(locale):
    site = SITES[locale]
    params = {
        "productcodes": "5003617",
        "businesspurposes": "Update",
        "licensetiers": "Free",
        "sites": [site],
    }
    response = requests.get(
        "https://api-router.kaspersky-labs.com/downloads/search/v3/b2c",
        params=params,
    )
    response.raise_for_status()
    versions = response.json()[0]["response"]["Windows"]["Kaspersky4Win"]["Downloader"][
        site
    ]
    max_version_key = max(
        versions, key=lambda k: float(k) if k.isdigit() else -1
    )  # Get the max version, usually only one version, just in case
    url = versions[str(max_version_key)][locale]["Link"]
    return url


def download_and_get_path(url):
    temp_dir = tempfile.mkdtemp()
    response = requests.get(url, stream=True)
    response.raise_for_status()
    file_name = url.split("/")[-1]
    with open(os.path.join(temp_dir, file_name), "wb") as f:
        for chunk in response.iter_content(chunk_size=8192):
            f.write(chunk)
    return os.path.join(temp_dir, file_name)


if __name__ == "__main__":
    if os.name != "nt":
        raise NotImplementedError("Only Windows is supported.")

    default_locale = "zh-Hans-CN"

    if len(os.sys.argv) > 1:
        locale = os.sys.argv[1]
        if locale not in ALLOWED_LOCALES:
            raise ValueError(f"Unsupported locale: {locale}")
    else:
        locale = default_locale

    if locale not in FAKE_ACTIVATION_CODE:
        raise ValueError(f"Unsupported locale: {locale}")

    print("This script will install Kaspersky Free Antivirus (KFA) for Windows.")
    print(
        "Attention: If you cancel the installation, do not use the installer shortcut on the desktop, it will not activate KFA automatically."
    )
    print(
        "If KFA asks for login or activation code, please use the activation code: "
        + FAKE_ACTIVATION_CODE[locale]
    )
    print(
        "If KFA requests for an email address, please close the window and open KFA again."
    )
    installer_url = get_installer_url(locale)
    print(installer_url)
    installer_path = download_and_get_path(installer_url)
    print(installer_path)

    subprocess.Popen(
        [
            installer_path,
            "/pSKIPPRODUCTCHECK=1",
            "/pACTIVATIONCODE=" + FAKE_ACTIVATION_CODE[locale],
        ],
    )