androllen
commented
4 years ago C# 对称加密
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace Program
{
public class EncryptHelper
{
public EncryptHelper()
{
this.mobjCryptoService = new RijndaelManaged();
this.Key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
}
private byte[] GetLegalKey()
{
string text = this.Key;
this.mobjCryptoService.GenerateKey();
byte[] key = this.mobjCryptoService.Key;
int num = key.Length;
if (text.Length > num)
{
text = text.Substring(0, num);
}
else if (text.Length < num)
{
text = text.PadRight(num, ' ');
}
return Encoding.ASCII.GetBytes(text);
}
private byte[] GetLegalIV()
{
string text = "E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
this.mobjCryptoService.GenerateIV();
byte[] iv = this.mobjCryptoService.IV;
int num = iv.Length;
if (text.Length > num)
{
text = text.Substring(0, num);
}
else if (text.Length < num)
{
text = text.PadRight(num, ' ');
}
return Encoding.ASCII.GetBytes(text);
}
public string Encrypto(string Source)
{
byte[] bytes = Encoding.UTF8.GetBytes(Source);
string result;
using (MemoryStream memoryStream = new MemoryStream())
{
this.mobjCryptoService.Key = this.GetLegalKey();
this.mobjCryptoService.IV = this.GetLegalIV();
using (ICryptoTransform cryptoTransform = this.mobjCryptoService.CreateEncryptor())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Write))
{
cryptoStream.Write(bytes, 0, bytes.Length);
cryptoStream.FlushFinalBlock();
}
byte[] inArray = memoryStream.ToArray();
result = Convert.ToBase64String(inArray);
}
}
return result;
}
public string Decrypto(string Source)
{
string result;
try
{
byte[] array = Convert.FromBase64String(Source);
using (MemoryStream memoryStream = new MemoryStream(array, 0, array.Length))
{
this.mobjCryptoService.Key = this.GetLegalKey();
this.mobjCryptoService.IV = this.GetLegalIV();
using (ICryptoTransform cryptoTransform = this.mobjCryptoService.CreateDecryptor())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Read))
{
using (StreamReader streamReader = new StreamReader(cryptoStream))
{
result = streamReader.ReadToEnd();
}
}
}
}
}
catch (Exception ex)
{
result = "";
}
return result;
}
private SymmetricAlgorithm mobjCryptoService;
private string Key;
}
}private EncryptHelper eh = new EncryptHelper();
//加密
if (!string.IsNullOrEmpty(this.txtSource.Text))
{
this.txtResult.Text = this.eh.Encrypto(this.txtSource.Text);
}
//解密
if (!string.IsNullOrEmpty(this.txtSource.Text))
{
this.txtResult.Text = this.eh.Decrypto(this.txtSource.Text);
}
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