| public static ComputeSaltedPassword ( HMACMethod method, byte password, byte salt, int iterations, int length ) : byte[] | ||
| method | HMACMethod | the HMAC method to use. |
| password | byte | the password to use |
| salt | byte | the salt. Must be at least 64-bit |
| iterations | int | the number of iterations. Must be at least 1000 |
| length | int | the number of bytes to return |
| return | byte[] | |
public void TestPBE2()
{
Stopwatch sw = new Stopwatch();
sw.Start();
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
byte[] data = new byte[30];
rng.GetBytes(data);
_ = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA512, Encoding.UTF8.GetBytes("test"), data, 400000, 20);
sw.Stop();
System.Console.WriteLine(sw.Elapsed.TotalMilliseconds);
}
/// <summary>
/// Updates the <see cref="SaltedPassword"/>. Returns False if the password value did not change.
/// </summary>
/// <param name="hashMethod"></param>
/// <param name="salt"></param>
/// <param name="iterations"></param>
/// <returns>Returns False if the password value did not change.</returns>
public bool TryUpdate(HashMethod hashMethod, byte[] salt, int iterations)
{
bool hasChanged = false;
if (m_salt == null || !salt.SecureEquals(m_salt))
{
hasChanged = true;
m_salt = salt;
}
if (m_hashMethod != hashMethod)
{
hasChanged = true;
m_hashMethod = hashMethod;
}
if (iterations != m_iterations)
{
hasChanged = true;
m_iterations = iterations;
}
if (hasChanged)
{
switch (hashMethod)
{
case HashMethod.Sha1:
SaltedPassword = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA1, m_passwordBytes, m_salt, m_iterations, 20);
break;
case HashMethod.Sha256:
SaltedPassword = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA256, m_passwordBytes, m_salt, m_iterations, 32);
break;
case HashMethod.Sha384:
SaltedPassword = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA384, m_passwordBytes, m_salt, m_iterations, 48);
break;
case HashMethod.Sha512:
SaltedPassword = PBKDF2.ComputeSaltedPassword(HMACMethod.SHA512, m_passwordBytes, m_salt, m_iterations, 64);
break;
default:
throw new Exception("Invalid Hash Method");
}
return(true);
}
return(false);
}
