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77 lines
2.9 KiB
C#
77 lines
2.9 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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namespace DS.Module.Core.Helpers;
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/// <summary>
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/// Des加密帮助类
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/// </summary>
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public static class DesHelper
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{
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/// <summary>
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///
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/// </summary>
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private static byte[] Keys =
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{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F };
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/// <summary>
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/// DES加密字符串
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/// </summary>
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/// <param name="encryptString">待加密的字符串</param>
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/// <param name="encryptKey">加密密钥,要求为16位</param>
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/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
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public static string EncryptDES(this string encryptString, string encryptKey)
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{
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try
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{
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byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 16));
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byte[] rgbIV = Keys;
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byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
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using (var DCSP = DES.Create())
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{
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using (MemoryStream mStream = new MemoryStream())
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{
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using (CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateEncryptor(rgbKey, rgbIV),
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CryptoStreamMode.Write))
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{
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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return Convert.ToBase64String(mStream.ToArray()).Replace('+', '_').Replace('/', '~');
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}
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}
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}
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}
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catch (Exception ex)
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{
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throw new Exception("密码加密异常" + ex.Message);
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}
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}
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/// <summary>
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/// DES解密字符串
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/// </summary>
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/// <param name="decryptString">待解密的字符串</param>
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/// <param name="decryptKey">解密密钥,要求为16位,和加密密钥相同</param>
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/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
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public static string DecryptDES(this string decryptString, string decryptKey)
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{
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byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 16));
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byte[] rgbIV = Keys;
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byte[] inputByteArray = Convert.FromBase64String(decryptString.Replace('_', '+').Replace('~', '/'));
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using (var DCSP = DES.Create())
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{
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using (MemoryStream mStream = new MemoryStream())
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{
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using (CryptoStream cStream =
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new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
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{
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byte[] inputByteArrays = new byte[inputByteArray.Length];
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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return Encoding.UTF8.GetString(mStream.ToArray());
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}
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}
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}
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}
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} |