/// <summary>
/// Initializes a new instance of the EncryptionProvider class.
/// </summary>
/// <param name="algorithm">The symmetric algorithm to use during cryptographic transformations.</param>
/// <param name="padding">The padding mode to use.</param>
/// <param name="mode">The cipher mode to use.</param>
/// <param name="key">The key to use.</param>
/// <param name="iv">The initialization vector to use.</param>
public EncryptionProvider(SymmetricAlgorithm algorithm, byte[] key, byte[] iv)
{
_algorithm = algorithm;
// _algorithm.Padding = PaddingMode.PKCS7;
// _algorithm.Mode = CipherMode.CBC;
_algorithm.Key = key;
_algorithm.IV = iv;
foreach (KeySizes keySize in _algorithm.LegalKeySizes)
Debug.WriteLine(string.Format("Algorithm: {0}, KeyMaxSize: {1}, KeyMinSize: {2}", _algorithm.GetType().Name, keySize.MaxSize, keySize.MinSize));
}
/// <summary>
/// Initializes an instance of the SecuritySession_KnownSymmetric class.
/// </summary>
/// <param name="symmetricAlgorithm">The symmetricAlgorithm to be used.</param>
/// <param name="name">The name of the security context.</param>
public SecuritySession_KnownSymmetric(SymmetricAlgorithm symmetricAlgorithm, string name)
: base(name, null)
{
// LOG:
BinaryLogWriter binaryLogWriter = GenuineLoggingServices.BinaryLogWriter;
if (binaryLogWriter != null && binaryLogWriter[LogCategory.Security] > 0 )
{
binaryLogWriter.WriteEvent(LogCategory.Security, "SecuritySession_KnownSymmetric.SecuritySession_KnownSymmetric",
LogMessageType.SecuritySessionKey, null, null, this.Remote, null,
GenuineUtility.CurrentThreadId, Thread.CurrentThread.Name, this,
name, -1,
0, 0, 0, "Encryption using " + symmetricAlgorithm.GetType().ToString(), null, null, null,
"Security Session security information is initialized.");
}
this.SymmetricAlgorithm = symmetricAlgorithm;
this._encryptor = this.SymmetricAlgorithm.CreateEncryptor();
this._decryptor = this.SymmetricAlgorithm.CreateDecryptor();
this.IsEstablishedEvent.Set();
}
private void GenerateKey(SymmetricAlgorithm alg)
{
alg.GenerateKey();
alg.GenerateIV();
Debug.WriteLine("Algorithm: " + alg.GetType().Name.PadRight(30) + " keySize(bits): " + alg.KeySize + " key: " + HexUtil.ByteArrayToHex(alg.Key));
}
/// <summary>
/// The encrypt.
/// </summary>
/// <param name="plainText">
/// The plain text.
/// </param>
/// <param name="key">
/// The key.
/// </param>
/// <param name="iv">
/// The iv.
/// </param>
/// <param name="desProvider">
/// The des provider.
/// </param>
/// <returns>
/// </returns>
private static byte[] Encrypt(byte[] plainText, byte[] key, byte[] iv, SymmetricAlgorithm desProvider)
{
int appendLength = 8 - (plainText.Length % 8);
appendLength = appendLength == 8 ? 0 : appendLength;
if (appendLength != 0)
{
var newArray = new byte[plainText.Length + appendLength];
Array.Copy(plainText, newArray, plainText.Length);
plainText = newArray;
}
// ICryptoTransform cryptoTransform = desProvider.CreateEncryptor(desProvider.Key, desProvider.IV);
// 密钥
MethodInfo mi = desProvider.GetType().GetMethod(
"_NewEncryptor", BindingFlags.NonPublic | BindingFlags.Instance);
object[] param = { key, CipherMode.ECB, iv, desProvider.FeedbackSize, 0 };
var desEncrypt = (ICryptoTransform)mi.Invoke(desProvider, param);
// var ms = new MemoryStream();
// var myCryptoStream = new CryptoStream(ms, desEncrypt, CryptoStreamMode.Write);
// myCryptoStream.Write(plainText, 0, plainText.Length);
// /* 密文 */
// return ms.ToArray();
return desEncrypt.TransformFinalBlock(plainText, 0, plainText.Length);
}
/// <summary>
/// The decrypt.
/// </summary>
/// <param name="cipherText">
/// The cipher text.
/// </param>
/// <param name="key">
/// The key.
/// </param>
/// <param name="iv">
/// The iv.
/// </param>
/// <param name="desProvider">
/// The des provider.
/// </param>
/// <returns>
/// </returns>
private static byte[] Decrypt(byte[] cipherText, byte[] key, byte[] iv, SymmetricAlgorithm desProvider)
{
/* DES解密 */
// ICryptoTransform cryptoTransform = desProvider.CreateDecryptor(desProvider.Key, desProvider.IV);
// 密钥
MethodInfo mi = desProvider.GetType().GetMethod(
"_NewEncryptor", BindingFlags.NonPublic | BindingFlags.Instance);
object[] param = { key, CipherMode.ECB, iv, desProvider.FeedbackSize, 1 };
var desEncrypt = (ICryptoTransform)mi.Invoke(desProvider, param);
// var ms = new MemoryStream();
// var myCryptoStream = new CryptoStream(ms, desEncrypt, CryptoStreamMode.Write);
// myCryptoStream.Write(cipherText, 0, cipherText.Length);
// return ms.ToArray();
return desEncrypt.TransformFinalBlock(cipherText, 0, cipherText.Length);
}
public SymmetricCipherPair(byte[] cipher, byte[] iv, SymmetricAlgorithm alg)
: base(cipher, iv)
{
Condition.Requires(alg).IsNotNull();
this.AlgorithmType = alg.GetType();
}
