//
// Summary:
// Creates a new InfoCardKeyedHashAlgorithm based on a SymmetricCryptoHandle.
//
// Parameters:
// cryptoHandle - The handle to the symmetric key on which to base the keyed hash.
//
public InfoCardKeyedHashAlgorithm(SymmetricCryptoHandle cryptoHandle)
{
InternalRefCountedHandle nativeHandle = null;
try
{
//
// Call native api to get a hashCryptoHandle.
//
int status = CardSpaceSelector.GetShim().m_csShimGetKeyedHash(cryptoHandle.InternalHandle, out nativeHandle);
if (0 != status)
{
IDT.CloseInvalidOutSafeHandle(nativeHandle);
ExceptionHelper.ThrowIfCardSpaceException(status);
throw IDT.ThrowHelperError(new Win32Exception(status));
}
m_cryptoHandle = (HashCryptoHandle)CryptoHandle.Create(nativeHandle);
m_param = (RpcHashCryptoParameters)m_cryptoHandle.Parameters;
}
catch
{
if (null != m_cryptoHandle)
{
m_cryptoHandle.Dispose();
}
throw;
}
}
//
// Summary:
// Creates a new InfoCardKeyedHashAlgorithm based on a SymmetricCryptoHandle.
//
// Parameters:
// cryptoHandle - The handle to the symmetric key on which to base the keyed hash.
//
public InfoCardKeyedHashAlgorithm(SymmetricCryptoHandle cryptoHandle)
{
InternalRefCountedHandle nativeHandle = null;
try
{
//
// Call native api to get a hashCryptoHandle.
//
int status = CardSpaceSelector.GetShim().m_csShimGetKeyedHash(cryptoHandle.InternalHandle, out nativeHandle);
if (0 != status)
{
IDT.CloseInvalidOutSafeHandle(nativeHandle);
ExceptionHelper.ThrowIfCardSpaceException(status);
throw IDT.ThrowHelperError(new Win32Exception(status));
}
m_cryptoHandle = (HashCryptoHandle)CryptoHandle.Create(nativeHandle);
m_param = (RpcHashCryptoParameters)m_cryptoHandle.Parameters;
}
catch
{
if (null != m_cryptoHandle)
{
m_cryptoHandle.Dispose();
}
throw;
}
}
protected override void Dispose(bool disposing)
{
try
{
if (null != m_cachedBlock)
{
Array.Clear(m_cachedBlock, 0, m_cachedBlock.Length);
}
m_cryptoHandle.Dispose();
}
finally
{
base.Dispose(disposing);
}
}