mirror of https://github.com/2dust/v2rayN
2dust
1 week ago
parent
57f9c8158e
commit
ba5ad12e13
@ -0,0 +1,75 @@
|
||||
using System.Security.Cryptography;
|
||||
using System.Text;
|
||||
|
||||
namespace ServiceLib.Common
|
||||
{
|
||||
public class DesUtils
|
||||
{
|
||||
/// <summary>
|
||||
/// Encrypt
|
||||
/// </summary>
|
||||
/// <param name="text"></param>
|
||||
/// /// <param name="key"></param>
|
||||
/// <returns></returns>
|
||||
public static string Encrypt(string? text, string? key = null)
|
||||
{
|
||||
if (text.IsNullOrEmpty())
|
||||
{
|
||||
return string.Empty;
|
||||
}
|
||||
GetKeyIv(key ?? GetDefaultKey(), out var rgbKey, out var rgbIv);
|
||||
var dsp = DES.Create();
|
||||
using var memStream = new MemoryStream();
|
||||
using var cryStream = new CryptoStream(memStream, dsp.CreateEncryptor(rgbKey, rgbIv), CryptoStreamMode.Write);
|
||||
using var sWriter = new StreamWriter(cryStream);
|
||||
sWriter.Write(text);
|
||||
sWriter.Flush();
|
||||
cryStream.FlushFinalBlock();
|
||||
memStream.Flush();
|
||||
return Convert.ToBase64String(memStream.GetBuffer(), 0, (int)memStream.Length);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Decrypt
|
||||
/// </summary>
|
||||
/// <param name="encryptText"></param>
|
||||
/// <param name="key"></param>
|
||||
/// <returns></returns>
|
||||
public static string Decrypt(string? encryptText, string? key = null)
|
||||
{
|
||||
if (encryptText.IsNullOrEmpty())
|
||||
{
|
||||
return string.Empty;
|
||||
}
|
||||
GetKeyIv(key ?? GetDefaultKey(), out var rgbKey, out var rgbIv);
|
||||
var dsp = DES.Create();
|
||||
var buffer = Convert.FromBase64String(encryptText);
|
||||
|
||||
using var memStream = new MemoryStream();
|
||||
using var cryStream = new CryptoStream(memStream, dsp.CreateDecryptor(rgbKey, rgbIv), CryptoStreamMode.Write);
|
||||
cryStream.Write(buffer, 0, buffer.Length);
|
||||
cryStream.FlushFinalBlock();
|
||||
return Encoding.UTF8.GetString(memStream.ToArray());
|
||||
}
|
||||
|
||||
private static void GetKeyIv(string key, out byte[] rgbKey, out byte[] rgbIv)
|
||||
{
|
||||
if (key.IsNullOrEmpty())
|
||||
{
|
||||
throw new ArgumentNullException("The key cannot be null");
|
||||
}
|
||||
if (key.Length <= 8)
|
||||
{
|
||||
throw new ArgumentNullException("The key length cannot be less than 8 characters.");
|
||||
}
|
||||
|
||||
rgbKey = Encoding.ASCII.GetBytes(key.Substring(0, 8));
|
||||
rgbIv = Encoding.ASCII.GetBytes(key.Insert(0, "w").Substring(0, 8));
|
||||
}
|
||||
|
||||
private static string GetDefaultKey()
|
||||
{
|
||||
return Utils.GetMd5(Utils.GetHomePath() + "DesUtils");
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue