}
            if (security_descriptor != null) {
                _dst = _dst.deferred;
                final int _security_descriptors = sd_size;
                _dst.enc_ndr_long(_security_descriptors);
                final int _security_descriptori = _dst.index;
                _dst.advance(1 * _security_descriptors);

                _dst = _dst.derive(_security_descriptori);

            }
            if (_security_descriptorp != 0) {
                _src = _src.deferred;
                final int _security_descriptors = _src.dec_ndr_long();
                final int _security_descriptori = _src.index;
                _src.advance(1 * _security_descriptors);

                if (this.security_descriptor == null) {
                    if (_security_descriptors < 0 || _security_descriptors > 0xFFFF) {

        info502.security_descriptor = null;

        // Replace info field
        Field infoField = msrpcShareGetInfo.getClass().getSuperclass().getDeclaredField("info");
        infoField.setAccessible(true);
        infoField.set(msrpcShareGetInfo, info502);

        // Test getSecurity returns null when security_descriptor is null
        ACE[] result = msrpcShareGetInfo.getSecurity();

        shareInfo502.max_uses = 10;
        shareInfo502.current_uses = 5;
        shareInfo502.path = "C:\\test";
        shareInfo502.password = "password";
        shareInfo502.sd_size = 2;
        shareInfo502.security_descriptor = new byte[] { 1, 2 };

        // Set up mocks for the security descriptor encoding
        mockDeferredBuffer.index = 0; // Set field directly
        mockDeferredBuffer.deferred = mockDeferredBuffer;

        public rpc.unicode_string object_name;
        /** Object attributes flags. */
        public int attributes;
        /** Security descriptor for the object. */
        public int security_descriptor;
        /** Quality of Service information. */
        public LsarQosInfo security_quality_of_service;

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {

        public rpc.unicode_string object_name;
        /** Object attributes flags. */
        public int attributes;
        /** Security descriptor for the object. */
        public int security_descriptor;
        /** Quality of Service information. */
        public LsarQosInfo security_quality_of_service;

        @Override
        public void encode(NdrBuffer _dst) throws NdrException {

import jcifs.internal.util.SMBUtil;
import jcifs.smb.SID;

/**
 * Test class for SecurityDescriptor
 */
class SecurityDescriptorTest {

    private SecurityDescriptor securityDescriptor;
    private byte[] testBuffer;

    @BeforeEach
    void setUp() {
        securityDescriptor = new SecurityDescriptor();
        testBuffer = new byte[1024];
    }

    @Test

        setErrorCode(response, 0);
        response.readDataWireFormat(buffer, 0, buffer.length);

        SecurityDescriptor sd = response.getSecurityDescriptor();
        assertNotNull(sd);

        // Verify it's the same instance on subsequent calls
        SecurityDescriptor sd2 = response.getSecurityDescriptor();
        assertSame(sd, sd2);
    }

    @Test

        SMBUtil.writeInt2(20, buffer, bufferIndex + 2);
        // Set buffer length (minimal SecurityDescriptor)
        SMBUtil.writeInt4(20, buffer, bufferIndex + 4);

        response = spy(response);
        when(response.getHeaderStart()).thenReturn(0);

        // Write minimal SecurityDescriptor header (20 bytes)
        buffer[20] = 1; // Revision
        buffer[21] = 0; // Sbz1