public virtual bool CompareHash(byte[] plaintext, byte[] hashedText)
{
if (plaintext == null)
{
throw new ArgumentNullException("plainText");
}
if (hashedText == null)
{
throw new ArgumentNullException("hashedText");
}
if (hashedText.Length == 0)
{
throw new ArgumentException(Properties.Resources.ExceptionByteArrayValueMustBeGreaterThanZeroBytes, "hashedText");
}
bool result = false;
byte[] hashedPlainText = null;
byte[] salt = null;
try
{
salt = this.ExtractSalt(hashedText);
hashedPlainText = this.CreateHashWithSalt(plaintext, salt);
}
finally
{
CryptographyUtility.ZeroOutBytes(salt);
}
result = CryptographyUtility.CompareBytes(hashedPlainText, hashedText);
return(result);
}
/// <summary>
/// <para>Decrypts bytes with the initialized algorithm and key.</para>
/// </summary>
/// <param name="encryptedText"><para>The text which you wish to decrypt.</para></param>
/// <returns><para>The resulting plaintext.</para></returns>
public virtual byte[] Decrypt(byte[] encryptedText)
{
byte[] output = null;
byte[] data = this.ExtractIV(encryptedText);
this.algorithm.Key = Key;
using (ICryptoTransform transform = this.algorithm.CreateDecryptor())
{
//output = this.Transform(transform, data);
output = CryptographyUtility.Transform(transform, data);
}
CryptographyUtility.ZeroOutBytes(this.algorithm.Key);
return(output);
}
/// <summary>
/// <para>Encrypts bytes with the initialized algorithm and key.</para>
/// </summary>
/// <param name="plaintext"><para>The plaintext in which you wish to encrypt.</para></param>
/// <returns><para>The resulting ciphertext.</para></returns>
public virtual byte[] Encrypt(byte[] plaintext)
{
byte[] output = null;
byte[] cipherText = null;
this.algorithm.Key = Key;
using (ICryptoTransform transform = this.algorithm.CreateEncryptor())
{
//cipherText = this.Transform(transform, plaintext);
cipherText = CryptographyUtility.Transform(transform, plaintext);
}
output = new byte[IVLength + cipherText.Length];
Buffer.BlockCopy(this.algorithm.IV, 0, output, 0, IVLength);
Buffer.BlockCopy(cipherText, 0, output, IVLength, cipherText.Length);
CryptographyUtility.ZeroOutBytes(this.algorithm.Key);
return(output);
}