import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.smb2.create.Smb2CloseRequest;
import jcifs.internal.smb2.create.Smb2CloseResponse;
import jcifs.internal.smb2.create.Smb2CreateRequest;
import jcifs.internal.smb2.create.Smb2CreateResponse;
import jcifs.internal.smb2.info.Smb2QueryInfoRequest;
import jcifs.internal.smb2.info.Smb2QueryInfoResponse;
import jcifs.internal.smb2.info.Smb2SetInfoRequest;

     * an SMB server represented by the {@link jcifs.smb.SmbFile} parameter. See
     * {@link jcifs.smb.SmbFile} for a detailed description and examples of
     * the smb URL syntax.
     *
     * @param file
     *            An <code>SmbFile</code> specifying the file to read from
     * @throws SmbException if an SMB error occurs
     */

            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 };

    /**
     * SMB2 protocol header template with magic number 0xFE 'SMB'
     */
    public static final byte[] SMB2_HEADER = { (byte) 0xFE, (byte) 'S', (byte) 'M', (byte) 'B', // ProtocolId
            (byte) 64, (byte) 0x00, // StructureSize (LE)

            filePath += "/";
        }
        filePath += fileInfo.getName();

        // Ensure proper SMB URL format
        if (!filePath.startsWith("smb://")) {
            if (filePath.startsWith("/")) {
                filePath = "smb://localhost" + filePath;
            } else {
                filePath = "smb://localhost/" + filePath;
            }
        }

        try {

        @DisplayName("maskSecretValue should mask SMB URLs containing credentials")
        @CsvSource({ "'smb://user:password@server/share', 'smb://user:******@server/share'",
                "'smb://domain\\user:secret@host/path', 'smb://domain\\user:******@host/path'",
                "'smb2://admin:admin123@192.168.1.1/folder', 'smb2://admin:******@192.168.1.1/folder'",

        SmbSession result = transport.getSmbSession(ctx, host, domain);
        assertSame(session, result);
        verify(transport).getSmbSession(eq(ctx), eq(host), eq(domain));
    }

    // SMB2 detection: true/false and exception path
    @Test
    @DisplayName("isSMB2 returns true/false and can throw")
    void isSMB2_variants() throws Exception {
        when(transport.isSMB2()).thenReturn(true, false);

package jcifs.internal.smb2;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateBufferSize(1001, 1000, "test"));
    }

    @Test
    @DisplayName("Test SMB2 buffer size validation")
    void testSmb2BufferSize() {
        assertDoesNotThrow(() -> InputValidator.validateSmb2BufferSize(1000000L, "test"));

    @Test
    @DisplayName("Test getSelectedDialect returns SMB1")
    void testGetSelectedDialectSMB1() {
        // Arrange
        when(negotiationResponse.getSelectedDialect()).thenReturn(DialectVersion.SMB1);

        // Act
        DialectVersion dialect = negotiationResponse.getSelectedDialect();

        // Assert
        assertEquals(DialectVersion.SMB1, dialect);
        verify(negotiationResponse).getSelectedDialect();

        assertNotNull(SMBUtil.SMB2_HEADER);
        // The actual header is 68 bytes (4 + 2 + 2 + 2 + 2 + 4 + 2 + 2 + 4 + 4 + 8 + 4 + 4 + 8 + 8 + 8 = 68)
        assertEquals(68, SMBUtil.SMB2_HEADER.length);

        // Verify SMB2 header signature
        assertEquals((byte) 0xFE, SMBUtil.SMB2_HEADER[0]);
        assertEquals((byte) 'S', SMBUtil.SMB2_HEADER[1]);
        assertEquals((byte) 'M', SMBUtil.SMB2_HEADER[2]);