1.微信小程序登录获取用户的openid信息

需要使用AES-128-CBC解密处理

 /// <summary> /// ASE加解密 /// </summary> public class AESHelper { /// <summary> /// 秘钥 /// </summary> public static string AesKey; /// <summary> /// 16位初始向量 /// </summary> public static string AesIV; /// <summary> /// AES解密 /// </summary> /// <param name="text"></param> /// <param name="password"></param> /// <param name="iv"></param> /// <returns></returns> public static string AESDecrypt(string text) { try { //16进制数据转换成byte byte[] encryptedData = Convert.FromBase64String(text); // strToToHexByte(text); RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Key = Convert.FromBase64String(AesKey); // Encoding.UTF8.GetBytes(AesKey); rijndaelCipher.IV = Convert.FromBase64String(AesIV);// Encoding.UTF8.GetBytes(AesIV); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.PKCS7; ICryptoTransform transform = rijndaelCipher.CreateDecryptor(); byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length); string result = Encoding.Default.GetString(plainText); return result; } catch (Exception ex) { throw ex; } } }

测试代码：

AESHelper.AesIV = "r7BXXKkLb8qrSNn05n0qiA=="; AESHelper.AesKey = "tiihtNczf5v6AKRyjwEUhQ=="; string text = "CiyLU1Aw2KjvrjMdj8YKliAjtP4gsMZM" + "QmRzooG2xrDcvSnxIMXFufNstNGTyaGS" + "9uT5geRa0W4oTOb1WT7fJlAC+oNPdbB+" + "3hVbJSRgv+4lGOETKUQz6OYStslQ142d" + "NCuabNPGBzlooOmB231qMM85d2/fV6Ch" + "evvXvQP8Hkue1poOFtnEtpyxVLW1zAo6" + "/1Xx1COxFvrc2d7UL/lmHInNlxuacJXw" + "u0fjpXfz/YqYzBIBzD6WUfTIF9GRHpOn" + "/Hz7saL8xz+W//FRAUid1OksQaQx4CMs" + "8LOddcQhULW4ucetDf96JcR3g0gfRK4P" + "C7E/r7Z6xNrXd2UIeorGj5Ef7b1pJAYB" + "6Y5anaHqZ9J6nKEBvB4DnNLIVWSgARns" + "/8wR2SiRS7MNACwTyrGvt9ts8p12PKFd" + "lqYTopNHR1Vf7XjfhQlVsAJdNiKdYmYV" + "oKlaRv85IfVunYzO0IKXsyl7JCUjCpoG" + "20f0a04COwfneQAGGwd5oa+T8yO5hzuy" + "Db/XcxxmK01EpqOyuxINew=="; string s = AESHelper.AESDecrypt(text); Console.WriteLine(s);

原文参考：https://www.cnblogs.com/jetz/p/6384809.html

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