// Arrange
        byte[] key14 = hex("01020304050607 11121314151617"); // two 7-byte chunks
        byte[] key7 = Arrays.copyOfRange(key14, 0, 7);
        byte[] data8 = NtlmUtil.S8;
        byte[] out14 = new byte[16];
        byte[] out7 = new byte[8];

        // Act
        NtlmUtil.E(key14, data8, out14);
        NtlmUtil.E(key7, data8, out7);

        // Assert: first block identical to single-chunk encryption

     */
    static Stream<Arguments> decodeProvider() {
        return Stream.of(Arguments.of("", new byte[0]), Arguments.of("QQ==", new byte[] { (byte) 0x41 }), // "A"
                Arguments.of("QUI=", new byte[] { (byte) 0x41, (byte) 0x42 }), // "AB"
                Arguments.of("TWFu", "Man".getBytes()), Arguments.of("AAAA", new byte[] { (byte) 0x00, (byte) 0x00, (byte) 0x00 }), // all zeros

	{"TrimRight", []byte("☺"), "☺", []byte{}},
	{"TrimPrefix", nil, "", nil},
	{"TrimPrefix", []byte{}, "", []byte{}},
	{"TrimPrefix", []byte{'a'}, "a", []byte{}},
	{"TrimPrefix", []byte("☺"), "☺", []byte{}},
	{"TrimSuffix", nil, "", nil},
	{"TrimSuffix", []byte{}, "", []byte{}},
	{"TrimSuffix", []byte{'a'}, "a", []byte{}},
	{"TrimSuffix", []byte("☺"), "☺", []byte{}},
}

        byte[] testSessionKey = new byte[16];
        Arrays.fill(testSessionKey, (byte) 0xAA);
        byte[] testPreauth = new byte[64];
        Arrays.fill(testPreauth, (byte) 0xBB);

        // When
        byte[] signingKey300 = Smb3KeyDerivation.deriveSigningKey(Smb2Constants.SMB2_DIALECT_0300, testSessionKey, testPreauth);

        for (int i = 0; i < 4; i++) {
            dst[dstIndex++] = (byte) 0xFF;
        }
        SMBUtil.writeInt2(this.writeMode, dst, dstIndex);
        dstIndex += 2;
        SMBUtil.writeInt2(this.remaining, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00;
        dstIndex++;
        dst[dstIndex++] = (byte) 0x00;
        SMBUtil.writeInt2(this.dataLength, dst, dstIndex);

        assertEquals((byte) 0xFD, buffer[3]);
    }

    @Test
    @DisplayName("Should decode transform header from byte buffer")
    void testDecodeFromBuffer() {
        // Given
        byte[] buffer = new byte[52];
        int index = 0;

        // Protocol ID - 0xFD534D42 in little-endian
        buffer[index++] = (byte) 0x42;
        buffer[index++] = (byte) 0x4D;
        buffer[index++] = (byte) 0x53;

            // Given
            byte[] zeroKey = new byte[SOURCE_KEY_SIZE];
            byte[] maxKey = new byte[SOURCE_KEY_SIZE];
            Arrays.fill(maxKey, (byte) 0xFF);
            byte[] patternKey = new byte[SOURCE_KEY_SIZE];
            for (int i = 0; i < SOURCE_KEY_SIZE; i++) {
                patternKey[i] = (byte) i;
            }

            // When & Then

        dst[di] = (byte) (i & 0xFF);
        di++;
        dst[di++] = (byte) (i >> 8 & 0xFF);
        dst[di++] = (byte) (i >> 16 & 0xFF);
        dst[di] = (byte) (i >> 24 & 0xFF);
        return 4;
    }

    /* Decode integers
     */

    /**
     * Decodes a 16-bit unsigned integer from big-endian byte order.
     *

        byte[] buffer = new byte[50];
        int bufferIndex = 0;

        // SMB3 capabilities
        int testCapabilities = 0x0000002F; // DFS, LEASING, LARGE_MTU, MULTI_CHANNEL, PERSISTENT_HANDLES, DIRECTORY_LEASING

        // Random but realistic GUID
        byte[] testGuid = { (byte) 0x01, (byte) 0x23, (byte) 0x45, (byte) 0x67, (byte) 0x89, (byte) 0xAB, (byte) 0xCD, (byte) 0xEF,

class MIENameTest {

    // Helper to build a valid buffer according to the expected layout.
    private static byte[] buildBuffer(byte[] oidDer, byte[] nameBytes) {
        byte[] tokId = new byte[] { 0x04, 0x01 };
        int oidLen = oidDer.length;
        int nameLen = nameBytes.length;

        byte[] buf = new byte[2 + 2 + oidLen + 4 + nameLen];
        int i = 0;
        // TOK_ID
        buf[i++] = tokId[0];