return mac.Sum(make([]byte, 0, mac.Size())), nil
}

// parseCiphertext parses and converts a ciphertext into
// the format expected by a secretKey.
//
// Previous implementations of the secretKey produced a structured
// ciphertext. parseCiphertext converts all previously generated
// formats into the expected format.
func parseCiphertext(b []byte) ([]byte, kms.SecretKeyType) {
	if len(b) == 0 {
		return b, kms.AES256
	}

        assertEquals("Expected structureSize = 2", exception.getMessage());
    }

    @Test
    @DisplayName("Test readBytesWireFormat with zero structure size throws exception")
    void testReadBytesWireFormatZeroStructureSize() {
        byte[] buffer = new byte[1024];
        int bufferIndex = 0;

        // Set structure size to 0 (invalid)

        assertEquals(0, bytesWritten);
    }

    @Test
    @DisplayName("Should read valid structure from wire format")
    void testReadBytesWireFormatValidStructure() throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;

        // Write structure size (4) at offset
        SMBUtil.writeInt2(4, buffer, offset);

    @DisplayName("Test readBytesWireFormat with valid structure size")
    void testReadBytesWireFormatValidStructureSize() throws Exception {
        response = new Smb2QueryInfoResponse(mockConfig, Smb2Constants.SMB2_0_INFO_FILE, FileInformation.FILE_INTERNAL_INFO);

        byte[] buffer = new byte[1024];
        int bufferIndex = 100; // Start at non-zero index

        // Set structure size to 9 (valid)

import gradlebuild.basics.ArchitectureDataType

val structure = extensions.create<ProjectStructure>("projectStructure")

gradle.rootProject {
    tasks.register("architectureDoc", GeneratorTask::class.java) {
        description = "Generates the architecture documentation"
        outputFile = layout.projectDirectory.file("architecture/platforms.md")
        elements = provider { structure.architectureElements.map { it.build() } }
    }

            assertEquals(16, bytesRead); // Structure size + reserved (4) + count (4) + remaining (4) + channel info (4)
            assertEquals(1024, response.getCount());
            assertEquals(512, response.getRemaining());
        }

        @Test
        @DisplayName("Should throw exception for invalid structure size")
        void testInvalidStructureSize() {

# CLAUDE.md - AI Assistant Guide for CodeLibs CoreLib

Java 21 utility library. Maven build system, Apache License 2.0.

## Repository Structure

```
src/main/java/org/codelibs/core/
├── beans/       # Bean manipulation & introspection (converter/, factory/, impl/, util/)
├── collection/  # Enhanced collections (LruHashMap, CaseInsensitiveMap)
├── concurrent/  # Concurrency utilities
├── convert/     # Type conversion (*ConversionUtil)

    }

    @Test
    @DisplayName("Should read valid structure from wire format")
    void testReadBytesWireFormatValidStructure() throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;

        // Write valid structure (16 bytes)
        SMBUtil.writeInt2(16, buffer, offset); // Structure size
        buffer[offset + 2] = (byte) 0x01; // Share type (DISK)

        @Test
        @DisplayName("Should read valid structure with size 4")
        void testReadBytesWireFormatValidStructure() throws SMBProtocolDecodingException {
            // Given
            byte[] buffer = new byte[10];
            int bufferIndex = 0;
            SMBUtil.writeInt2(4, buffer, bufferIndex); // Write structure size = 4
            SMBUtil.writeInt2(0, buffer, bufferIndex + 2); // Reserved field

        assertEquals(0, bytesWritten);
    }

    @Test
    @DisplayName("Should handle error response structure size 9")
    void testReadBytesWireFormatErrorResponse() throws Exception {
        // Given
        byte[] buffer = new byte[256];
        int bufferIndex = 0;

        // Write structure size (9) - indicates error response
        SMBUtil.writeInt2(9, buffer, bufferIndex);