解密微信小程序获取手机号

解密微信小程序获取手机号的过程需要以下步骤：

1. 首先，在wxml文件中，使用`button`按钮设置`open-type="getPhoneNumber"`并绑定`bindgetphonenumber`事件\[1\]\[2\]。

<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber"></button>

2. 在js文件中，定义`getPhoneNumber`函数，并在函数中获取手机号的加密数据\[1\]。

Page({
  getPhoneNumber(e) {
    console.log(e.detail.errMsg);
    console.log(e.detail.iv);
    console.log(e.detail.encryptedData);
  }
})

3. 在第三方服务端，结合小程序的`session_key`和`app_id`，使用相应算法对加密数据进行解密，从中获取手机号\[2\]\[4\]。解密使用到的数据主要包括`appId`（开发者appid）、`session_key`、`encryptedData`（从`e.detail.encryptedData`获取）和`iv`（从`e.detail.iv`获取）。其中，为了获取`session_key`，需要使用`js_code`参数调用`wx.login`接口\[3\]。

总结起来，解密微信小程序获取手机号的过程包括用户点击获取手机号按钮，获取到加密数据后，在第三方服务端结合`session_key`和`app_id`进行解密操作，最终获取到真实手机号码\[1\]\[2\]\[3\]\[4\]。
#### 引用[.reference_title]
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