private BasicOcspResp GenerateResponse(
string signatureName,
AsymmetricKeyParameter privateKey,
X509Certificate[] chain,
DateTime producedAt,
SecureRandom random)
{
DerObjectIdentifier signingAlgorithm;
try
{
signingAlgorithm = OcspUtilities.GetAlgorithmOid(signatureName);
}
catch (Exception e)
{
throw new ArgumentException("unknown signing algorithm specified", e);
}
Asn1EncodableVector responses = new Asn1EncodableVector();
foreach (ResponseObject respObj in list)
{
try
{
responses.Add(respObj.ToResponse());
}
catch (Exception e)
{
throw new OcspException("exception creating Request", e);
}
}
ResponseData tbsResp = new ResponseData(responderID.ToAsn1Object(), new DerGeneralizedTime(producedAt), new DerSequence(responses), responseExtensions);
ISigner sig = null;
try
{
sig = SignerUtilities.GetSigner(signatureName);
if (random != null)
{
sig.Init(true, new ParametersWithRandom(privateKey, random));
}
else
{
sig.Init(true, privateKey);
}
}
catch (Exception e)
{
throw new OcspException("exception creating signature: " + e, e);
}
DerBitString bitSig = null;
try
{
byte[] encoded = tbsResp.GetDerEncoded();
sig.BlockUpdate(encoded, 0, encoded.Length);
bitSig = new DerBitString(sig.GenerateSignature());
}
catch (Exception e)
{
throw new OcspException("exception processing TBSRequest: " + e, e);
}
AlgorithmIdentifier sigAlgId = OcspUtilities.GetSigAlgID(signingAlgorithm);
DerSequence chainSeq = null;
if (chain != null && chain.Length > 0)
{
Asn1EncodableVector v = new Asn1EncodableVector();
try
{
for (int i = 0; i != chain.Length; i++)
{
v.Add(
X509CertificateStructure.GetInstance(
Asn1Object.FromByteArray(chain[i].GetEncoded())));
}
}
catch (IOException e)
{
throw new OcspException("error processing certs", e);
}
catch (CertificateEncodingException e)
{
throw new OcspException("error encoding certs", e);
}
chainSeq = new DerSequence(v);
}
return(new BasicOcspResp(new BasicOcspResponse(tbsResp, sigAlgId, bitSig, chainSeq)));
}
