public override byte[] GetSignatureAlgorithmIdentifier(HashAlgorithmName hashAlgorithm)
{
string oid;
if (hashAlgorithm == HashAlgorithmName.SHA256)
{
oid = Oids.RsaPkcs1Sha256;
}
else if (hashAlgorithm == HashAlgorithmName.SHA384)
{
oid = Oids.RsaPkcs1Sha384;
}
else if (hashAlgorithm == HashAlgorithmName.SHA512)
{
oid = Oids.RsaPkcs1Sha512;
}
else
{
throw new ArgumentOutOfRangeException(
nameof(hashAlgorithm),
hashAlgorithm,
SR.Format(SR.Cryptography_UnknownHashAlgorithm, hashAlgorithm.Name));
}
return(DerEncoder.ConstructSequence(
DerEncoder.SegmentedEncodeOid(oid),
DerEncoder.SegmentedEncodeNull()));
}