* @param sessionKey the base session key
     * @param preauthIntegrity the pre-authentication integrity hash (for SMB 3.1.1) or null
     * @return derived signing key
     */
    public static byte[] deriveSigningKey(final int dialect, final byte[] sessionKey, final byte[] preauthIntegrity) {
        return derive(sessionKey, dialect == Smb2Constants.SMB2_DIALECT_0311 ? SIGNLABEL_311 : SIGNLABEL_300,

    void testDeriveSigningKey_DifferentDialects() {
        // When
        byte[] signingKey300 = Smb3KeyDerivation.deriveSigningKey(Smb2Constants.SMB2_DIALECT_0300, sessionKey, preauthIntegrity);
        byte[] signingKey311 = Smb3KeyDerivation.deriveSigningKey(Smb2Constants.SMB2_DIALECT_0311, sessionKey, preauthIntegrity);

        // Then

            this.signingKey = sessionKey.clone();
            break;
        case Smb2Constants.SMB2_DIALECT_0300:
        case Smb2Constants.SMB2_DIALECT_0302:
            this.signingKey = Smb3KeyDerivation.deriveSigningKey(dialect, sessionKey, new byte[0] /* unimplemented */);
            this.algorithmName = "AESCMAC";
            this.provider = Crypto.getProvider();
            break;
        case Smb2Constants.SMB2_DIALECT_0311:

                byte[] derivedKey = new byte[16];
                Arrays.fill(derivedKey, (byte) 0xCC);
                mockedKeyDerivation.when(
                        () -> Smb3KeyDerivation.deriveSigningKey(eq(Smb2Constants.SMB2_DIALECT_0300), any(byte[].class), any(byte[].class)))
                        .thenReturn(derivedKey);