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using System;
using System.Collections;
using System.IO;
using Org.BouncyCastle.Tls.Crypto;
namespace Org.BouncyCastle.Tls
{
/// <summary>Interface describing a TLS server endpoint.</summary>
public interface TlsServer
: TlsPeer
{
void Init(TlsServerContext context);
/// <summary>Return the specified session, if available.</summary>
/// <remarks>
/// Note that the peer's certificate chain for the session (if any) may need to be periodically revalidated.
/// </remarks>
/// <param name="sessionID">the ID of the session to resume.</param>
/// <returns>A <see cref="TlsSession"/> with the specified session ID, or null.</returns>
/// <seealso cref="SessionParameters.PeerCertificate"/>
TlsSession GetSessionToResume(byte[] sessionID);
byte[] GetNewSessionID();
/// <summary>Return the <see cref="TlsPskExternal">external PSK</see> to select from the ClientHello.</summary>
/// <remarks>
/// WARNING: EXPERIMENTAL FEATURE, UNSTABLE API
/// Note that this will only be called when TLS 1.3 or higher is amongst the offered protocol versions, and one
/// or more PSKs are actually offered.
/// </remarks>
/// <param name="identities">an <see cref="IList"/> of <see cref="PskIdentity"/> instances.</param>
/// <returns>The <see cref="TlsPskExternal"/> corresponding to the selected identity, or null to not select
/// any.</returns>
TlsPskExternal GetExternalPsk(IList identities);
void NotifySession(TlsSession session);
/// <exception cref="IOException"/>
void NotifyClientVersion(ProtocolVersion clientVersion);
/// <exception cref="IOException"/>
void NotifyFallback(bool isFallback);
/// <exception cref="IOException"/>
void NotifyOfferedCipherSuites(int[] offeredCipherSuites);
/// <param name="clientExtensions">(Int32 -> byte[])</param>
/// <exception cref="IOException"/>
void ProcessClientExtensions(IDictionary clientExtensions);
/// <exception cref="IOException"/>
ProtocolVersion GetServerVersion();
/// <exception cref="IOException"/>
int[] GetSupportedGroups();
/// <exception cref="IOException"/>
int GetSelectedCipherSuite();
/// <returns>(Int32 -> byte[])</returns>
/// <exception cref="IOException"/>
IDictionary GetServerExtensions();
/// <param name="serverExtensions">(Int32 -> byte[])</param>
/// <exception cref="IOException"/>
void GetServerExtensionsForConnection(IDictionary serverExtensions);
/// <returns>(SupplementalDataEntry)</returns>
/// <exception cref="IOException"/>
IList GetServerSupplementalData();
/// <summary>Return server credentials to use.</summary>
/// <remarks>
/// The returned value may be null, or else it MUST implement <em>exactly one</em> of
/// <see cref="TlsCredentialedAgreement"/>, <see cref="TlsCredentialedDecryptor"/>, or
/// <see cref = "TlsCredentialedSigner"/>, depending on the key exchange that was negotiated.
/// </remarks>
/// <returns>a <see cref="TlsCredentials"/> object or null for anonymous key exchanges.</returns>
/// <exception cref="IOException"/>
TlsCredentials GetCredentials();
/// <remarks>
/// This method will be called (only) if the server included an extension of type "status_request" with empty
/// "extension_data" in the extended server hello. See <i>RFC 3546 3.6. Certificate Status Request</i>. If a
/// non-null <see cref="CertificateStatus"/> is returned, it is sent to the client as a handshake message of
/// type "certificate_status".
/// </remarks>
/// <returns>A <see cref="CertificateStatus"/> to be sent to the client (or null for none).</returns>
/// <exception cref="IOException"/>
CertificateStatus GetCertificateStatus();
/// <exception cref="IOException"/>
CertificateRequest GetCertificateRequest();
/// <exception cref="IOException"/>
TlsPskIdentityManager GetPskIdentityManager();
/// <exception cref="IOException"/>
TlsSrpLoginParameters GetSrpLoginParameters();
/// <exception cref="IOException"/>
TlsDHConfig GetDHConfig();
/// <exception cref="IOException"/>
TlsECConfig GetECDHConfig();
/// <param name="clientSupplementalData">(SupplementalDataEntry)</param>
/// <exception cref="IOException"/>
void ProcessClientSupplementalData(IList clientSupplementalData);
/// <summary>Called by the protocol handler to report the client certificate, only if
/// <see cref="GetCertificateRequest"/> returned non-null.</summary>
/// <remarks>
/// Note: this method is responsible for certificate verification and validation.
/// </remarks>
/// <param name="clientCertificate">the effective client certificate (may be an empty chain).</param>
/// <exception cref="IOException"/>
void NotifyClientCertificate(Certificate clientCertificate);
/// <summary>RFC 5077 3.3. NewSessionTicket Handshake Message.</summary>
/// <remarks>
/// This method will be called (only) if a NewSessionTicket extension was sent by the server. See <i>RFC 5077
/// 4. Recommended Ticket Construction</i> for recommended format and protection.
/// </remarks>
/// <returns>The ticket.</returns>
/// <exception cref="IOException"/>
NewSessionTicket GetNewSessionTicket();
}
}
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