微信支付(退款結果通知)golang AES-256-ECB解密

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處理支付退款結果通知時，需要對返回資料進行AES-256-ECB解密，golang標準庫未支援AES ECB加解密，特此記錄。

一、解密方式

解密步驟如下

1. 對加密串A做base64解碼，得到加密串B
2. 對商戶key做md5，得到32位小寫key* ( key設定路徑：商戶平台(pay.weixin.qq.com)–>賬戶設定–>API安全–>密鑰設定 )
3. 用key*對加密串B做AES-256-ECB解密

二、Golang 範例程式碼

package mainimport ("encoding/base64""fmt""strings""github.com/nanjishidu/gomini/gocrypto")func main() {var (paykey   = "ziR0QKsTUfMOuochC9RfCdmfHECorQAP"req_info = `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`)b, err := base64.StdEncoding.DecodeString(req_info)if err != nil {fmt.Println(b, err)return}gocrypto.SetAesKey(strings.ToLower(gocrypto.Md5(paykey)))plaintext, err := gocrypto.AesECBDecrypt(b)if err != nil {fmt.Println(err)return}fmt.Println(string(plaintext))}

三、Golang 第三方庫

支援常見加解密

github.com/nanjishidu/gomini/gocrypto