private OcspReq GenerateRequest(DerObjectIdentifier signingAlgorithm, AsymmetricKeyParameter privateKey, X509Certificate[] chain, SecureRandom random) { //IL_018f: Expected O, but got Unknown Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector(); global::System.Collections.IEnumerator enumerator = ((global::System.Collections.IEnumerable)list).GetEnumerator(); try { while (enumerator.MoveNext()) { RequestObject requestObject = (RequestObject)enumerator.get_Current(); try { asn1EncodableVector.Add(requestObject.ToRequest()); } catch (global::System.Exception e) { throw new OcspException("exception creating Request", e); } } } finally { global::System.IDisposable disposable = enumerator as global::System.IDisposable; if (disposable != null) { disposable.Dispose(); } } TbsRequest tbsRequest = new TbsRequest(requestorName, new DerSequence(asn1EncodableVector), requestExtensions); ISigner signer = null; Signature optionalSignature = null; if (signingAlgorithm != null) { if (requestorName == null) { throw new OcspException("requestorName must be specified if request is signed."); } try { signer = SignerUtilities.GetSigner(signingAlgorithm.Id); if (random != null) { signer.Init(forSigning: true, new ParametersWithRandom(privateKey, random)); } else { signer.Init(forSigning: true, privateKey); } } catch (global::System.Exception ex) { throw new OcspException(string.Concat((object)"exception creating signature: ", (object)ex), ex); } DerBitString derBitString = null; try { byte[] encoded = tbsRequest.GetEncoded(); signer.BlockUpdate(encoded, 0, encoded.Length); derBitString = new DerBitString(signer.GenerateSignature()); } catch (global::System.Exception ex2) { throw new OcspException(string.Concat((object)"exception processing TBSRequest: ", (object)ex2), ex2); } AlgorithmIdentifier signatureAlgorithm = new AlgorithmIdentifier(signingAlgorithm, DerNull.Instance); if (chain != null && chain.Length > 0) { Asn1EncodableVector asn1EncodableVector2 = new Asn1EncodableVector(); try { for (int i = 0; i != chain.Length; i++) { asn1EncodableVector2.Add(X509CertificateStructure.GetInstance(Asn1Object.FromByteArray(chain[i].GetEncoded()))); } } catch (IOException val) { IOException e2 = val; throw new OcspException("error processing certs", (global::System.Exception)(object) e2); } catch (CertificateEncodingException e3) { throw new OcspException("error encoding certs", e3); } optionalSignature = new Signature(signatureAlgorithm, derBitString, new DerSequence(asn1EncodableVector2)); } else { optionalSignature = new Signature(signatureAlgorithm, derBitString); } } return(new OcspReq(new OcspRequest(tbsRequest, optionalSignature))); }