public void AddAuthenticationTime(DateTime?currentDateTime = null)
{
if (currentDateTime == null)
{
currentDateTime = DateTime.UtcNow;
}
var writer = new AsnWriter(AsnEncodingRules.DER);
writer.WriteUtcTime(currentDateTime.Value);
SignedAttributes.Add(new AsnEncodedData(new Oid(Oids.SigningTime), writer.Encode()));
}
public void AddAlgorithmProtectAttribute()
{
var writer = new AsnWriter(AsnEncodingRules.DER);
var algAttr = default(CmsAlgorithmProtectAttributeAsn);
algAttr.DigestAlgorithm = default(AlgorithmIdentifierAsn);
algAttr.DigestAlgorithm.Algorithm = new Oid(SigningPolicy.DigestAlgorithmOID);
algAttr.DigestAlgorithm.Parameters = SigningPolicy.DigestAlgorithmParameters;
var sigAlg = default(AlgorithmIdentifierAsn);
sigAlg.Algorithm = new Oid(SigningPolicy.EncryptionAlgorithmOID, SigningPolicy.SignatureAlgorithmName);
sigAlg.Parameters = SigningPolicy.SigningParameters;
algAttr.SignatureAlgorithm = sigAlg;
algAttr.Encode(writer);
var payload = writer.Encode();
SignedAttributes.Add(new AsnEncodedData(new Oid(Oids.IdAaCmsAlgorithmProtect), payload));
}
