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  • C#DES加密

    记录一下

    DES加密

    public static string DESEncrypt(string Data, string key)
            {
                return DESEncrypt(Data, key, "utf-8");
            }
    
    /// <summary>
            /// DES加密算法
            /// </summary>
            /// <param name="Data">加密明文</param>
            /// <param name="key">密钥长度为8个字符</param>
            /// <param name="charset">字符编码</param>
            /// <returns>返回密文</returns>
            public static string DESEncrypt(string Data, string key, string charset)
            {
    
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    
                des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                des.IV = ASCIIEncoding.ASCII.GetBytes(key);
    
                byte[] inputByteArray = Encoding.GetEncoding(charset).GetBytes(Data);
    
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
    
                cs.FlushFinalBlock();
    
                byte[] ret = ms.ToArray();
    
                cs.Close();
                ms.Close();
    
                return BytesToHexString(ret);
            }
    
    
     public static string BytesToHexString(byte[] bytes)
            {
                System.Text.StringBuilder s = new System.Text.StringBuilder();
                foreach (byte b in bytes)
                {
                    s.Append(b.ToString("x2").ToUpper());
                }
                return s.ToString();
            }

    解密:

     public static string DESDecrypt(string Data, string key)
            {
                return DESDecrypt(Data, key, "utf-8");
            }
    
    
            /// <summary>
            /// DES 解密算法
            /// </summary>
            /// <param name="Data">密文</param>
            /// <param name="key">密钥长度为8个字符</param>
            /// <param name="charset">字符编码</param>
            /// <returns>明文</returns>
            public static string DESDecrypt(string Data, string key, string charset)
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
    
                des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                des.IV = ASCIIEncoding.ASCII.GetBytes(key);
    
                byte[] inputByteArray = HexStringToBytes(Data);
    
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
    
    
                byte[] ret = ms.ToArray();
    
                cs.Close();
                ms.Close();
    
                return Encoding.GetEncoding(charset).GetString(ret);
            }
    
    
     public static byte[] HexStringToBytes(string hexString)
            {
                if (hexString == null)
                {
                    throw new ArgumentNullException("hexString");
                }
    
                if ((hexString.Length & 1) != 0)
                {
                    throw new ArgumentOutOfRangeException("hexString", hexString, "hexString must contain an even number of characters.");
                }
    
                byte[] result = new byte[hexString.Length / 2];
    
                for (int i = 0; i < hexString.Length; i += 2)
                {
                    result[i / 2] = byte.Parse(hexString.Substring(i, 2), NumberStyles.HexNumber);
                }
    
                return result;
            }
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  • 原文地址:https://www.cnblogs.com/Cein/p/8406442.html
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