Code example for NullCipher

Methods: , doFinal, getBlockSize, getExemptionMechanism, getIV, getOutputSize, getParameters, init, update

0
    static { 
        new SecureRandom().nextBytes(BYTES);
    } 
 
    public static void main(String[] args) throws Exception {
        NullCipher nc = new NullCipher();
        // testing init(...) 
        nc.init(Cipher.ENCRYPT_MODE, (Certificate) null);
        nc.init(Cipher.ENCRYPT_MODE, (Certificate) null, (SecureRandom) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null, (AlgorithmParameters) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null, (AlgorithmParameterSpec) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null, (AlgorithmParameterSpec) null,
            (SecureRandom) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null, (AlgorithmParameters) null,
            (SecureRandom) null);
        nc.init(Cipher.ENCRYPT_MODE, (Key) null, (SecureRandom) null);
        // testing getBlockSize() 
        if (nc.getBlockSize() != 1) {
            throw new Exception("Error with getBlockSize()");
        } 
        // testing update(...) 
        byte[] out = nc.update(BYTES);
        if (!Arrays.equals(out, BYTES)) {
            throw new Exception("Error with update(byte[])");
        } 
        out = nc.update(BYTES, 0, BYTES.length);
        if (!Arrays.equals(out, BYTES)) {
            throw new Exception("Error with update(byte[], int, int)");
        } 
        if (nc.update(BYTES, 0, BYTES.length, out) != BYTES.length) {
            throw new Exception("Error with update(byte[], int, int, byte[])");
        } 
        if (nc.update(BYTES, 0, BYTES.length, out, 0) != BYTES.length) {
            throw new Exception(
                "Error with update(byte[], int, int, byte[], int)"); 
        } 
        // testing doFinal(...) 
        if (nc.doFinal() != null) {
            throw new Exception("Error with doFinal()");
        } 
        if (nc.doFinal(out, 0) != 0) {
             throw new Exception("Error with doFinal(byte[], 0)");
        } 
        out = nc.doFinal(BYTES);
        if (!Arrays.equals(out, BYTES)) {
            throw new Exception("Error with doFinal(byte[])");
        } 
        out = nc.doFinal(BYTES, 0, BYTES.length);
        if (!Arrays.equals(out, BYTES)) {
            throw new Exception("Error with doFinal(byte[], int, int)");
        } 
        if (nc.doFinal(BYTES, 0, BYTES.length, out) != BYTES.length) {
            throw new Exception(
                "Error with doFinal(byte[], int, int, byte[])"); 
        } 
        if (nc.doFinal(BYTES, 0, BYTES.length, out, 0) != BYTES.length) {
            throw new Exception(
                "Error with doFinal(byte[], int, int, byte[], int)"); 
        } 
        // testing getExemptionMechanism() 
        if (nc.getExemptionMechanism() != null) {
            throw new Exception("Error with getExemptionMechanism()");
        } 
        // testing getOutputSize(int) 
        if (nc.getOutputSize(5) != 5) {
            throw new Exception("Error with getOutputSize()");
        } 
        // testing getIV(), getParameters(), getAlgorithm(), etc. 
        if (nc.getIV() == null) { // should've been null;
                                  // left it as is for backward-compatibility 
            throw new Exception("Error with getIV()");
        } 
        if (nc.getParameters() != null) {
            throw new Exception("Error with getParameters()");
        } 
        if (nc.getAlgorithm() != null) {
            throw new Exception("Error with getAlgorithm()");
        }