C#实现微信AES-128-CBC加密数据的解密

﹏ヽ暗。殇╰゛Y 2022-05-29 09:23 342阅读 0赞

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][https_www.cnblogs.com_jetz_p_6384809.html]

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[https_www.cnblogs.com_jetz_p_6384809.html]: https://www.cnblogs.com/jetz/p/6384809.html
[C_]: http://blog.csdn.net/u011127019/article/details/78922236
[C_ 1]: http://blog.csdn.net/u011127019/article/details/78922149
[C_ 2]: http://blog.csdn.net/u011127019/article/details/78921880