/// <summary>
/// Encrypts/decrypts a byte array
/// </summary>
/// <param name="buffer">Bytes to crypt</param>
/// <param name="key">"Password" for encryption</param>
/// <param name="iv">"Salt" for encryption. A starting point for encryption.</param>
/// <param name="encrypt">Do you wish to encrypt or decrypt?</param>
/// <param name="algorithm">Encryption algorithm. AES/DES/TripleDES</param>
/// <returns></returns>
public static byte[] Crypt(byte[] buffer, byte[] key, byte[] iv, bool encrypt = true, string algorithm = "aes")
{
AesCryptoServiceProvider aes = null;
DESCryptoServiceProvider des = null;
TripleDESCryptoServiceProvider tripsDes = null;
ICryptoTransform cryptor;
switch (algorithm.ToLower())
{
case "aes":
aes = new AesCryptoServiceProvider();
aes.Key = key;
aes.IV = iv;
//aes.Padding = PaddingMode.None;
if (encrypt) cryptor = aes.CreateEncryptor();
else cryptor = aes.CreateDecryptor();
break;
case "des":
des = new DESCryptoServiceProvider();
des.Key = key;
des.IV = iv;
//des.Padding = PaddingMode.None;
if (encrypt) cryptor = des.CreateEncryptor();
else cryptor = des.CreateDecryptor();
break;
case "tripledes":
tripsDes = new TripleDESCryptoServiceProvider();
tripsDes.Key = key;
tripsDes.IV = iv;
//tripsDes.Padding = PaddingMode.None;
if (encrypt) cryptor = tripsDes.CreateEncryptor();
else cryptor = tripsDes.CreateDecryptor();
break;
default:
throw new ArgumentException(algorithm + " is not an implemented encryption algorithm. Use AES/DES/TripleDES.");
}
try
{
return cryptor.TransformFinalBlock(buffer, 0, buffer.Length);
}
catch (CryptographicException)
{
throw new ArgumentException("Ensure you have the right key/IV.");
}
finally
{
cryptor.Dispose();
if (aes != null) aes.Dispose();
if (des != null) des.Dispose();
if (tripsDes != null) tripsDes.Dispose();
}
}
static void Main(string[] args)
{
const int n = 100 * 1000;
var sw = new Stopwatch();
Random r = new Random();
var data = new byte[1024];
var key8B = new byte[8];
var key16B = new byte[16];
var key24B = new byte[24];
var key32B = new byte[32];
r.NextBytes(data);
r.NextBytes(key8B);
r.NextBytes(key16B);
r.NextBytes(key24B);
r.NextBytes(key32B);
Action<string> outputToConsole = (s) =>
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine(s);
};
// AES
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("AES");
var aes = new AesCryptoServiceProvider();
aes.Padding = PaddingMode.PKCS7;
aes.Key = key16B;
Action doAes = () => EncryptDecryptAndDispose(aes.CreateEncryptor(), aes.CreateDecryptor(), data);
doAes.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
aes.Dispose();
// RSA
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("DES");
var des = new DESCryptoServiceProvider();
des.IV = key8B;
des.Key = key8B;
Action doDes = () => EncryptDecryptAndDispose(des.CreateEncryptor(), des.CreateDecryptor(), data);
doDes.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
des.Dispose();
// RC2
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("RC2");
var rc2 = new RC2CryptoServiceProvider();
rc2.IV = key8B;
rc2.Key = key8B;
Action doRc2 = () => EncryptDecryptAndDispose(rc2.CreateEncryptor(), rc2.CreateDecryptor(), data);
doRc2.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
rc2.Dispose();
// Rijndael
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("Rijndael");
var rijndael = new RijndaelManaged();
rijndael.IV = key16B;
rijndael.Key = key16B;
Action doRijndael = () => EncryptDecryptAndDispose(rijndael.CreateEncryptor(), rijndael.CreateDecryptor(), data);
doRijndael.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
rijndael.Dispose();
// 3DES
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("3DES");
var tripleDes = new TripleDESCryptoServiceProvider();
tripleDes.IV = key8B;
tripleDes.Key = key24B;
Action do3des = () => EncryptDecryptAndDispose(tripleDes.CreateEncryptor(), tripleDes.CreateDecryptor(), data);
do3des.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
tripleDes.Dispose();
// RSA
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("RSA");
RSAParameters param = new RSAParameters();
param.Exponent = new byte[] {0, 1, 0};
var store = new X509Store(StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
X509Certificate cert = null;
foreach (X509Certificate cer in store.Certificates)
{
if (cer != null)
{
cert = cer;
break;
}
}
param.Modulus = cert.GetPublicKey();
var rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(param);
Action doRsa = () =>
{
var encryptedData = rsa.Encrypt(key32B, true);
//var decryptedData = rsa.Decrypt(encryptedData, true);
};
doRsa.Repeat(n)
.OutputPerformance(sw, outputToConsole)();
rsa.Dispose();
Console.Read();
}
/// <summary>
/// 加密字符串
/// </summary>
/// <param name="basicData">源字符串</param>
/// <returns>加密后的字符串</returns>
public string EncryptString(string basicData)
{
DESCryptoServiceProvider provider = null;
MemoryStream ms = null;
CryptoStream cst = null;
StreamWriter sw = null;
try
{
byte[] byteKey = System.Text.ASCIIEncoding.ASCII.GetBytes(_cryptographyKey);
provider = new DESCryptoServiceProvider();
ms = new MemoryStream();
cst = new CryptoStream(ms, provider.CreateEncryptor(byteKey, byteKey), CryptoStreamMode.Write);
sw = new StreamWriter(cst);
sw.Write(basicData);
sw.Flush();
cst.FlushFinalBlock();
sw.Flush();
return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
}
catch
{
return null;
}
finally
{
if (provider != null)
provider.Dispose();
if (ms != null)
ms.Dispose();
if (cst != null)
cst.Dispose();
if (sw != null)
sw.Dispose();
}
}
/// <summary>
/// 解密字符串
/// </summary>
/// <param name="basicData">加密了的字符串</param>
/// <returns>解密后的字符串</returns>
public string DecryptString(string basicData)
{
DESCryptoServiceProvider provider = null;
MemoryStream ms = null;
CryptoStream cst = null;
StreamReader sr = null;
try
{
byte[] byteEnc;
byte[] byteKey = System.Text.ASCIIEncoding.ASCII.GetBytes(_cryptographyKey);
try
{
byteEnc = Convert.FromBase64String(basicData);
}
catch
{
return null;
}
provider = new DESCryptoServiceProvider();
ms = new MemoryStream(byteEnc);
cst = new CryptoStream(ms, provider.CreateDecryptor(byteKey, byteKey), CryptoStreamMode.Read);
sr = new StreamReader(cst);
return sr.ReadToEnd();
}
catch
{
return null;
}
finally
{
if (sr != null)
sr.Dispose();
if (cst != null)
cst.Dispose();
if (ms != null)
ms.Dispose();
if (provider != null)
provider.Dispose();
}
}
/// <summary>
/// Encrypt byte
/// </summary>
/// <param name="data">Bytes to encrypt.</param>
/// <returns></returns>
private byte[] EncryptToBytes(byte[] data)
{
DESCryptoServiceProvider desc = new DESCryptoServiceProvider();
try
{
desc.Key = mKey;
desc.IV = mIV;
desc.Mode = mMode;
desc.Padding = mPaddingMode;
return desc.CreateEncryptor().TransformFinalBlock(data, 0, data.Length);
}
finally
{
if (null != desc)
{
desc.Dispose();
}
}
}
