* **reactive** authentication after receiving a challenge from either an origin web server or proxy
 * server.
 *
 * ## Preemptive Authentication
 *
 * To make HTTPS calls using an HTTP proxy server OkHttp must first negotiate a connection with
 * the proxy. This proxy connection is called a "TLS Tunnel" and is specified by
 * [RFC 2817][1]. The HTTP CONNECT request that creates this tunnel connection is special: it

    /**
     * Negotiate RDMA parameters
     *
     * @param request negotiation request parameters
     * @return negotiation response
     * @throws IOException if negotiation fails
     */
    public abstract RdmaNegotiateResponse negotiate(RdmaNegotiateRequest request) throws IOException;

    /**

import jcifs.smb1.smb1.NtlmPasswordAuthentication;
import jcifs.smb1.util.Base64;

/**
 * This class is used internally by {@code NtlmHttpFilter},
 * {@code NtlmServlet}, and {@code NetworkExplorer} to negiotiate password
 * hashes via NTLM SSP with MSIE. It might also be used directly by servlet
 * containers to incorporate similar functionality.
 * <p>
 * How NTLMSSP is used in conjunction with HTTP and MSIE clients is

        assertTrue(context.isEstablished());
        assertArrayEquals(serverChallenge, context.getServerChallenge());
        // Signing key may or may not be generated depending on flags negotiation
        // The context negotiates flags with server, so we can't guarantee signing key
    }

    @Test
    void testInitSecContext_state2_withoutSigning() throws Exception {

        assertSame(transport, t);
        verify(transport, times(1)).acquire();
    }

    @Test
    @DisplayName("isSignatureSetupRequired depends on digest and negotiate flags")
    void testIsSignatureSetupRequired() throws Exception {
        SmbSessionImpl session = newSession();

        // Case 1: digest already set -> false

     * @return A <code>byte[]</code> containing the local security
     * context.  This is used by the client to negotiate local
     * authentication.
     */
    public byte[] getContext() {
        return context;
    }

    /**
     * Sets the local security context.  This is used by the client
     * to negotiate local authentication.
     *
     * @param context The local security context.
     */

        }
        if (len == 0) {
            resp = initialToken();
        } else {
            resp = negotitate(inputBuf, offset, len);
        }

        if (resp == null) {
            return null;
        }
        return resp.toByteArray();
    }

    private SpnegoToken negotitate(final byte[] inputBuf, final int offset, final int len) throws CIFSException {

        // TCP fallback doesn't support real RDMA write
        throw new UnsupportedOperationException("RDMA write not supported by TCP fallback");
    }

    @Override
    public RdmaNegotiateResponse negotiate(RdmaNegotiateRequest request) throws IOException {
        // For TCP fallback, we simulate successful negotiation
        RdmaNegotiateResponse response = new RdmaNegotiateResponse();
        response.setStatus(0); // Success

            boolean result = response.verifySignature(buffer, 0, 100);

            assertTrue(result);
        }

        @Test
        @DisplayName("Should verify signature on error when secure negotiate required")
        void testVerifySignatureErrorWithSecureNegotiate() {
            byte[] buffer = new byte[100];
            response.setDigest(mockDigest);

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negotiator@0.6.3:
  version "0.6.3"
  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.3.tgz#58e323a72fedc0d6f9cd4d31fe49f51479590ccd"
  integrity sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==