/// <summary>
/// Returns the secret key to use for initializing the Mac.
/// </summary>
/// <param name="algorithm">The algorithm.</param>
/// <param name="keyMaterial">The key material.</param>
/// <returns>The secret key.</returns>
internal static SecretKeySpec GetSecretKey(MacAlgorithm algorithm, byte[] keyMaterial)
{
string algorithmName = MacAlgorithmProviderFactory.GetAlgorithmName(algorithm);
var signingKey = new SecretKeySpec(keyMaterial, algorithmName);
return(signingKey);
}
/// <summary>Returns the keyed hash algorithm from the platform.</summary>
/// <param name="algorithm">The algorithm desired.</param>
/// <returns>The platform-specific algorithm.</returns>
internal static Platform.KeyedHashAlgorithm GetAlgorithm(MacAlgorithm algorithm)
{
#if SILVERLIGHT
switch (algorithm)
{
case MacAlgorithm.HmacSha1:
return(new Platform.HMACSHA1());
case MacAlgorithm.HmacSha256:
return(new Platform.HMACSHA256());
default:
throw new NotSupportedException();
}
#else
string algorithmName = MacAlgorithmProviderFactory.GetAlgorithmName(algorithm);
var result = Platform.KeyedHashAlgorithm.Create(algorithmName);
if (result == null)
{
throw new NotSupportedException();
}
return(result);
#endif
}
/// <summary>
/// Returns the keyed hash algorithm from the platform.
/// </summary>
/// <param name="algorithm">The algorithm desired.</param>
/// <returns>The platform-specific algorithm.</returns>
internal static Platform.KeyedHashAlgorithm GetAlgorithm(MacAlgorithm algorithm)
{
string algorithmName = MacAlgorithmProviderFactory.GetAlgorithmName(algorithm);
var result = Platform.KeyedHashAlgorithm.Create(algorithmName);
if (result == null)
{
throw new NotSupportedException();
}
return(result);
}
/// <summary>
/// Returns the keyed hash algorithm from the platform.
/// </summary>
/// <param name="algorithm">The algorithm desired.</param>
/// <returns>The platform-specific algorithm.</returns>
internal static Mac GetAlgorithm(MacAlgorithm algorithm)
{
string algorithmName = MacAlgorithmProviderFactory.GetAlgorithmName(algorithm);
try
{
return(Mac.GetInstance(algorithmName));
}
catch (Java.Security.NoSuchAlgorithmException ex)
{
throw new NotSupportedException(ex.Message, ex);
}
}
/// <summary>
/// Returns the keyed hash algorithm from the platform.
/// </summary>
/// <param name="algorithm">The algorithm desired.</param>
/// <returns>The platform-specific algorithm.</returns>
internal static Mac GetAlgorithm(MacAlgorithm algorithm)
{
string algorithmName = MacAlgorithmProviderFactory.GetAlgorithmName(algorithm);
return(Mac.GetInstance(algorithmName));
}