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c#加密類使用方法示例

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復(fù)制代碼 代碼如下:

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Web;

namespace Encryption.App_Code
{
    /// summary>
    /// 加密碼類
    /// /summary>
    public class Encryption
    {
        /// summary>
        /// 加密
        /// /summary>
        /// param name="inputString">/param>
        /// returns>/returns>
        public static string DesEncrypt(string inputString)
        {
            return DesEncrypt(inputString, Key);
        }
        /// summary>
        /// 解密
        /// /summary>
        /// param name="inputString">/param>
        /// returns>/returns>
        public static string DesDecrypt(string inputString)
        {
            return DesDecrypt(inputString, Key);
        }
        /// summary>
        /// 密匙
        /// /summary>
        private static string Key
        {
            get
            {
                return "hongye10";
            }
        }
        /// summary>
        /// 加密字符串
        /// 注意:密鑰必須為8位
        /// /summary>
        /// param name="strText">字符串/param>
        /// param name="encryptKey">密鑰/param>
        /// param name="encryptKey">返回加密后的字符串/param>
        public static string DesEncrypt(string inputString, string encryptKey)
        {
            byte[] byKey = null;
            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
            try
            {
                byKey = System.Text.Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray = Encoding.UTF8.GetBytes(inputString);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                return Convert.ToBase64String(ms.ToArray());
            }
            catch (System.Exception error)
            {
                //return error.Message;
                return null;
            }
        }
        /// summary>
        /// 解密字符串
        /// /summary>
        /// param name="this.inputString">加了密的字符串/param>
        /// param name="decryptKey">密鑰/param>
        /// param name="decryptKey">返回解密后的字符串/param>
        public static string DesDecrypt(string inputString, string decryptKey)
        {
            byte[] byKey = null;
            byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
            byte[] inputByteArray = new Byte[inputString.Length];
            try
            {
                byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                inputByteArray = Convert.FromBase64String(inputString);
                MemoryStream ms = new MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                System.Text.Encoding encoding = new System.Text.UTF8Encoding();
                return encoding.GetString(ms.ToArray());
            }
            catch (System.Exception error)
            {
                //return error.Message;
                return null;
            }
        }
    }
}
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