public void init()

in src/main/java/org/apache/commons/crypto/cipher/OpenSslGaloisCounterMode.java [229:253]

• 20 lines of code
• 4 McCabe index (conditional complexity)

    public void init(final int mode, final byte[] key, final AlgorithmParameterSpec params)
            throws InvalidAlgorithmParameterException {

        if (aadBuffer == null) {
            aadBuffer = new ByteArrayOutputStream();
        } else {
            aadBuffer.reset();
        }

        this.cipherMode = mode;
        final byte[] iv;
        if (!(params instanceof GCMParameterSpec)) {
            // other AlgorithmParameterSpec is not supported now.
            throw new InvalidAlgorithmParameterException("Illegal parameters");
        }
        final GCMParameterSpec gcmParam = (GCMParameterSpec) params;
        iv = gcmParam.getIV();
        this.tagBitLen = gcmParam.getTLen();

        if (this.cipherMode == OpenSsl.DECRYPT_MODE) {
            inBuffer = new ByteArrayOutputStream();
        }

        context = OpenSslNative.init(context, mode, algorithmMode, padding, key, iv);
    }