internal RsaesOaepParameters GetRsaesOaepParameters()
{
if (OaepHashAlgorithm == DigestAlgorithm.Sha1)
{
return(new RsaesOaepParameters());
}
var oid = SecureMimeContext.GetDigestOid(OaepHashAlgorithm);
var hashAlgorithm = new AlgorithmIdentifier(new DerObjectIdentifier(oid), DerNull.Instance);
var maskGenFunction = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, hashAlgorithm);
return(new RsaesOaepParameters(hashAlgorithm, maskGenFunction, RsaesOaepParameters.DefaultPSourceAlgorithm));
}
public SystemSecuritySigner(DkimSignatureAlgorithm algorithm, AsymmetricAlgorithm key)
{
rsa = key as RSACryptoServiceProvider;
switch (algorithm)
{
case DkimSignatureAlgorithm.RsaSha256:
oid = SecureMimeContext.GetDigestOid(DigestAlgorithm.Sha256);
AlgorithmName = "RSASHA256";
hash = SHA256.Create();
break;
default:
oid = SecureMimeContext.GetDigestOid(DigestAlgorithm.Sha1);
AlgorithmName = "RSASHA1";
hash = SHA1.Create();
break;
}
}