src/main/java/org/apache/commons/crypto/stream/CryptoInputStream.java [443:464]:
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        } catch (final GeneralSecurityException e) {
            throw new IOException(e);
        }
    }

    /**
     * Overrides the {@link java.nio.channels.Channel#isOpen()}.
     *
     * @return {@code true} if, and only if, this channel is open.
     */
    @Override
    public boolean isOpen() {
        return !closed;
    }

    /**
     * Overrides the {@link InputStream#markSupported()}.
     *
     * @return {@code false} if the {@link CtrCryptoInputStream} don't support the mark
     *         method.
     */
    @Override
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src/main/java/org/apache/commons/crypto/stream/CryptoOutputStream.java [348:375]:
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        } catch (final GeneralSecurityException e) {
            throw new IOException(e);
        }
    }

    /**
     * Overrides the {@link java.nio.channels.Channel#isOpen()}. Tells whether or not this channel
     * is open.
     *
     * @return {@code true} if, and only if, this channel is open
     */
    @Override
    public boolean isOpen() {
        return !closed;
    }

    /**
     * Overrides the {@link OutputStream#write(byte[], int, int)}.
     * Encryption is buffer based. If there is enough room in {@link #inBuffer},
     * then write to this buffer. If {@link #inBuffer} is full, then do
     * encryption and write data to the underlying stream.
     *
     * @param array the data.
     * @param off the start offset in the data.
     * @param len the number of bytes to write.
     * @throws IOException if an I/O error occurs.
     */
    @Override
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