public IStreamCalculator CreateCalculator()
{
ISigner signer;
if (algID.Algorithm.Equals(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_256))
{
signer = new Gost3410DigestSigner(new ECGost3410Signer(), new Gost3411_2012_256Digest());
}
else if (algID.Algorithm.Equals(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_512))
{
signer = new Gost3410DigestSigner(new ECGost3410Signer(), new Gost3411_2012_512Digest());
}
else if (algID.Algorithm.Equals(CryptoProObjectIdentifiers.GostR3411x94WithGostR3410x2001))
{
signer = new Gost3410DigestSigner(new ECGost3410Signer(), new Gost3411Digest());
}
else if (algID.Algorithm.Equals(CryptoProObjectIdentifiers.GostR3411x94WithGostR3410x94))
{
signer = new Gost3410DigestSigner(new Gost3410Signer(), new Gost3411Digest());
}
else
{
throw new SecurityUtilityException("Signer " + algorithm + " not recognised.");
}
signer.Init(true, ParameterUtilities.WithRandom(privateKey, random));
return(new DefaultSignatureCalculator(signer));
}