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using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Ocsp;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.IO;
namespace Org.BouncyCastle.Tls
{
/// <summary>RFC 3546 3.6</summary>
public sealed class OcspStatusRequest
{
private readonly IList m_responderIDList;
private readonly X509Extensions m_requestExtensions;
/// <param name="responderIDList">an <see cref="IList"/> of <see cref="ResponderID"/>, specifying the list of
/// trusted OCSP responders. An empty list has the special meaning that the responders are implicitly known to
/// the server - e.g., by prior arrangement.</param>
/// <param name="requestExtensions">OCSP request extensions. A null value means that there are no extensions.
/// </param>
public OcspStatusRequest(IList responderIDList, X509Extensions requestExtensions)
{
this.m_responderIDList = responderIDList;
this.m_requestExtensions = requestExtensions;
}
/// <returns>an <see cref="IList"/> of <see cref="ResponderID"/>.</returns>
public IList ResponderIDList
{
get { return m_responderIDList; }
}
/// <returns>OCSP request extensions.</returns>
public X509Extensions RequestExtensions
{
get { return m_requestExtensions; }
}
/// <summary>Encode this <see cref="OcspStatusRequest"/> to a <see cref="Stream"/>.</summary>
/// <param name="output">the <see cref="Stream"/> to encode to.</param>
/// <exception cref="IOException"/>
public void Encode(Stream output)
{
if (m_responderIDList == null || m_responderIDList.Count < 1)
{
TlsUtilities.WriteUint16(0, output);
}
else
{
MemoryStream buf = new MemoryStream();
foreach (ResponderID responderID in m_responderIDList)
{
byte[] derEncoding = responderID.GetEncoded(Asn1Encodable.Der);
TlsUtilities.WriteOpaque16(derEncoding, buf);
}
TlsUtilities.CheckUint16(buf.Length);
TlsUtilities.WriteUint16((int)buf.Length, output);
Streams.WriteBufTo(buf, output);
}
if (m_requestExtensions == null)
{
TlsUtilities.WriteUint16(0, output);
}
else
{
byte[] derEncoding = m_requestExtensions.GetEncoded(Asn1Encodable.Der);
TlsUtilities.CheckUint16(derEncoding.Length);
TlsUtilities.WriteUint16(derEncoding.Length, output);
output.Write(derEncoding, 0, derEncoding.Length);
}
}
/// <summary>Parse an <see cref="OcspStatusRequest"/> from a <see cref="Stream"/>.</summary>
/// <param name="input">the <see cref="Stream"/> to parse from.</param>
/// <returns>an <see cref="OcspStatusRequest"/> object.</returns>
/// <exception cref="IOException"/>
public static OcspStatusRequest Parse(Stream input)
{
IList responderIDList = Platform.CreateArrayList();
{
byte[] data = TlsUtilities.ReadOpaque16(input);
if (data.Length > 0)
{
MemoryStream buf = new MemoryStream(data, false);
do
{
byte[] derEncoding = TlsUtilities.ReadOpaque16(buf, 1);
ResponderID responderID = ResponderID.GetInstance(TlsUtilities.ReadDerObject(derEncoding));
responderIDList.Add(responderID);
}
while (buf.Position < buf.Length);
}
}
X509Extensions requestExtensions = null;
{
byte[] derEncoding = TlsUtilities.ReadOpaque16(input);
if (derEncoding.Length > 0)
{
requestExtensions = X509Extensions.GetInstance(TlsUtilities.ReadDerObject(derEncoding));
}
}
return new OcspStatusRequest(responderIDList, requestExtensions);
}
}
}
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