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  • C#AES加密

    今天写个接口,要求如下,需要对应的AES加密(128位),例子php的

    C#实现

    /// <summary>
            ///  AES 加密 输出hex格式
            /// </summary>
            /// <param name="str">明文(待加密)</param>
            /// <param name="key">密文</param>
            /// <returns></returns>
            public static string AesEncrypt(string str, string key)
            {
                if (string.IsNullOrEmpty(str)) return null;
                Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);
    
                System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
                {
                    Key = Encoding.UTF8.GetBytes(key),
                    Mode = System.Security.Cryptography.CipherMode.ECB,
                    Padding = System.Security.Cryptography.PaddingMode.Zeros //加密什么格式对应改为就行,基本的话应该为PKCS7
                };
    
                System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateEncryptor();
                Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
    
                //return Convert.ToBase64String(resultArray, 0, resultArray.Length);
                return ByteArrayToHexString(resultArray);
            }
    
    
        /// <summary>
        /// 将一个byte数组转换成一个格式化的16进制字符串
        /// </summary>
        /// <param name="data">byte数组</param>
        /// <returns>格式化的16进制字符串</returns>
        public static string ByteArrayToHexString(byte[] data)
        {
            StringBuilder sb = new StringBuilder(data.Length * 3);
            foreach (byte b in data)
            {
                //16进制数字
                sb.Append(Convert.ToString(b, 16).PadLeft(2, '0'));
                //16进制数字之间以空格隔开
                //sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
            }
            return sb.ToString().ToUpper();
        }
         /// <summary>
            ///  AES 解密 输出hex格式
            /// </summary>
            /// <param name="str">明文(待解密)</param>
            /// <param name="key">密文</param>
            /// <returns></returns>
            public static string AesDecrypt(string str, string key)
            {
                if (string.IsNullOrEmpty(str)) return null;
                //Byte[] toEncryptArray = Convert.FromBase64String(str);
                byte[] toEncryptArray = HexStringToByteArray(str);
    
                System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
                {
                    Key = Encoding.UTF8.GetBytes(key),
                    Mode = System.Security.Cryptography.CipherMode.ECB,
                    Padding = System.Security.Cryptography.PaddingMode.Zeros
                };
    
                System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();
                Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
    
                return Encoding.UTF8.GetString(resultArray);
            }
            
    
          
        /// <summary>
        /// 将指定的16进制字符串转换为byte数组
        /// </summary>
        /// <param name="s">16进制字符串(如:“7F 2C 4A”或“7F2C4A”都可以)</param>
        /// <returns>16进制字符串对应的byte数组</returns>
        public static byte[] HexStringToByteArray(string s)
        {
            s = s.Replace(" ", "");
            byte[] buffer = new byte[s.Length / 2];
            for (int i = 0; i < s.Length; i += 2)
                buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16);
            return buffer;
        }

    输出为Base64将我注释的取消就行,这个是因为需求要的是hex格式

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  • 原文地址:https://www.cnblogs.com/Cein/p/8406428.html
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