DESCEncryption.cs
2.63 KB
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using NCC.Dependency;
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace NCC.DataEncryption
{
/// <summary>
/// DESC 加解密
/// </summary>
[SuppressSniffer]
public class DESCEncryption
{
/// <summary>
/// 加密
/// </summary>
/// <param name="text">加密文本</param>
/// <param name="skey">密钥</param>
/// <param name="uppercase">是否输出大写加密，默认 false</param>
/// <returns></returns>
public static string Encrypt(string text, string skey, bool uppercase = false)
{
using var des = DES.Create();
byte[] inputByteArray;
inputByteArray = Encoding.Default.GetBytes(text);
des.Key = Encoding.ASCII.GetBytes(MD5Encryption.Encrypt(skey, uppercase).Substring(0, 8));
des.IV = Encoding.ASCII.GetBytes(MD5Encryption.Encrypt(skey, uppercase).Substring(0, 8));
using var ms = new MemoryStream();
using var cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
var ret = new StringBuilder();
foreach (var b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
return ret.ToString();
}
/// <summary>
/// 解密
/// </summary>
/// <param name="hash">加密后字符串</param>
/// <param name="skey">密钥</param>
/// <param name="uppercase">是否输出大写加密，默认 false</param>
/// <returns></returns>
public static string Decrypt(string hash, string skey, bool uppercase = false)
{
using var des = DES.Create();
int len;
len = hash.Length / 2;
var inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(hash.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = Encoding.ASCII.GetBytes(MD5Encryption.Encrypt(skey, uppercase).Substring(0, 8));
des.IV = Encoding.ASCII.GetBytes(MD5Encryption.Encrypt(skey, uppercase).Substring(0, 8));
using var ms = new MemoryStream();
using var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
}
}