_2025-10-07_

 *  New: Support [HTTP 101] responses with `Response.socket`. This mechanism is only supported on
    HTTP/1.1. We also reimplemented our websocket client to use this new mechanism.

 *  New: The `okhttp-zstd` module negotiates [Zstandard (zstd)][zstd] compression with servers that
    support it. It integrates a new (unstable) [ZSTD-KMP] library, also from Square. Enable it like
    this:

    ```kotlin
    val client = OkHttpClient.Builder()

- Improved how the API server responds to **list** requests where the response format negotiates to Protobuf. List responses in Protobuf are marshalled one element at the time, drastically reducing memory needed to serve large collections. Streaming list responses can be disabled via the `StreamingCollectionEncodingToProtobuf` feature gate....

     */
    @Override
    public byte[] getServerEncryptionKey() {
        if (this.negotiated == null) {
            return null;
        }

        if (this.negotiated instanceof SmbComNegotiateResponse) {
            return ((SmbComNegotiateResponse) this.negotiated).getServerData().encryptionKey;
        }
        return null;
    }

    @Override

                log.debug("Multiple preauth negotiate contexts");
                return false;
            }
        }

        if (!foundPreauth) {
            log.error("Missing preauth negotiate context");
            return false;
        }
        if (!foundEnc && (caps & Smb2Constants.SMB2_GLOBAL_CAP_ENCRYPTION) != 0) {
            log.error("Missing encryption negotiate context");
            return false;

package jcifs.internal.smb2.nego;

import jcifs.Configuration;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Encryption Negotiate Context.
 *
 * This negotiate context is used in SMB 3.x to negotiate
 * encryption capabilities and cipher suites.
 *
 * @author mbechler
 */
public class EncryptionNegotiateContext implements NegotiateContextRequest, NegotiateContextResponse {

        }
    }

    @Override
    public void destroy() {
    }

    /**
     * This method simply calls {@code negotiate( req, resp, false )}
     * and then {@code chain.doFilter}. You can override and call
     * negotiate manually to achive a variety of different behavior.
     */
    @Override

        }
    }

    @Override
    public void destroy() {
    }

    /**
     * This method simply calls {@code negotiate( req, resp, false )}
     * and then {@code chain.doFilter}. You can override and call
     * negotiate manually to achive a variety of different behavior.
     */
    @Override

import jcifs.Configuration;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;

/**
 * SMB 3.1.1 Compression Capabilities negotiate context.
 *
 * This context is used during SMB2 negotiation to negotiate compression
 * algorithms for SMB3 data compression support.
 */
public class CompressionNegotiateContext implements NegotiateContextRequest, NegotiateContextResponse {

            assertTrue(true, "Negotiate context data length validation exists in code (max 1024 bytes)");
        } catch (SMBProtocolDecodingException e) {
            // If exception thrown, validation is working
            assertTrue(e.getMessage().contains("Invalid negotiate context data length") || e.getMessage().contains("Buffer too small")

import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Negotiate Protocol request message.
 *
 * This command is used to negotiate the SMB protocol dialect
 * and security parameters between client and server.
 *
 * @author mbechler
 */