public Gost3410_2012_256CryptoServiceProvider(IntPtr hProvHandle, int keySpec)
{
_safeProvHandle = new SafeProvHandle(hProvHandle, true);
_keySpec = keySpec;
LegalKeySizesValue = new KeySizes[] { new KeySizes(
GostConstants.GOST3410_2012_256KEY_SIZE, GostConstants.GOST3410_2012_256KEY_SIZE, 0) };
_safeKeyHandle = CapiHelper.GetKeyPairHelper(
CspAlgorithmType.Gost2012_256,
keySpec,
GostConstants.GOST3410_2012_256KEY_SIZE,
_safeProvHandle);
_hashImpl = Gost3411_2012_256.Create();
}
/// <summary>
/// Retreives the key pair
/// </summary>
private void GetKeyPair()
{
if (_safeKeyHandle == null)
{
lock (this)
{
if (_safeKeyHandle == null)
{
// We only attempt to generate a random key on desktop runtimes because the CoreCLR
// RSA surface area is limited to simply verifying signatures. Since generating a
// random key to verify signatures will always lead to failure (unless we happend to
// win the lottery and randomly generate the signing key ...), there is no need
// to add this functionality to CoreCLR at this point.
CapiHelper.GetKeyPairHelper(CapiHelper.CspAlgorithmType.Rsa, _parameters,
_randomKeyContainer, _keySize, ref _safeProvHandle, ref _safeKeyHandle);
}
}
}
}