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| ## 如何解密回调通知事件中的敏感数据？ | ||
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| --- | ||
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| ### 解密流程 | ||
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| 对于回调通知事件的敏感信息，微信商户平台使用了商户密钥基于 AES 算法加密。 | ||
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| 开发者可利用本库提供的 `AESUtility` 工具类自行解密相关字段。 | ||
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| 此外，本库还封装了直接解密事件的扩展方法，下面给出一个示例代码： | ||
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| ```csharp | ||
| /* 微信商户平台发来的通知内容 */ | ||
| string callbackXml = "<xml> ... </xml>"; | ||
| /* 将 XML 反序列化得到通知对象 */ | ||
| var callbackModel = client.DeserializeEvent(callbackJson); | ||
| /* 解密得到支付通知敏感数据（以退款结果通知为例） */ | ||
| var callbackResource = client.DecryptEventRequestInfo<Events.RefundEventRequestInfo>(callbackModel); | ||
| string outRefundNumber = callbackResource.OutRefundNumber; | ||
| string refundId = callbackResource.RefundId; | ||
| } | ||
| ``` | ||
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| 完整的回调通知模型定义可以参考项目目录下的 _src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Events_ 目录。 |
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docs/WechatTenpayV2/Advanced_EventSignatureVerification.md
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| ## 如何验证回调通知事件签名？ | ||
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| --- | ||
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| ### 验签流程 | ||
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| 你可根据官方文档的规则利用本库提供的 `MD5Utility`、`HMACUtility` 工具类自行进行签名验证。 | ||
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| 此外，本库还封装了直接解密事件的扩展方法，下面给出一个示例代码： | ||
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| ```csharp | ||
| bool ret = client.VerifyEventSignature( | ||
| callbackBody: "<xml> 微信回调通知中请求正文 XML 内容 </xml>" | ||
| ); | ||
| ``` |
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| ## 如何使用拦截器？ | ||
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| --- | ||
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| 拦截器在本库下的用法与在 [SKIT.FlurlHttpClient.Wechat.Api](../WechatApi/README.md) 模块下的用法类似，请参阅[相关文档](../WechatApi/Advanced_Interceptor.md)。 |
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| ## 如何指定 JSON 序列化器？ | ||
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| --- | ||
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| JSON 序列化器在本库下的用法与在 [SKIT.FlurlHttpClient.Wechat.Api](../WechatApi/README.md) 模块下的用法类似，请参阅[相关文档](../WechatApi/Advanced_JsonSerializer.md)。 |
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