52 lines
1.7 KiB
Java
52 lines
1.7 KiB
Java
// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.decryption_verification;
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import java.io.BufferedInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import javax.annotation.Nonnull;
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import org.bouncycastle.openpgp.PGPException;
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import org.pgpainless.decryption_verification.cleartext_signatures.VerifyCleartextSignaturesImpl;
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import org.pgpainless.exception.WrongConsumingMethodException;
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public class DecryptionBuilder implements DecryptionBuilderInterface {
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public static int BUFFER_SIZE = 4096;
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@Override
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public DecryptWith onInputStream(@Nonnull InputStream inputStream) {
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return new DecryptWithImpl(inputStream);
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}
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static class DecryptWithImpl implements DecryptWith {
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private final BufferedInputStream inputStream;
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DecryptWithImpl(InputStream inputStream) {
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this.inputStream = new BufferedInputStream(inputStream, BUFFER_SIZE);
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this.inputStream.mark(BUFFER_SIZE);
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}
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@Override
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public DecryptionStream withOptions(ConsumerOptions consumerOptions) throws PGPException, IOException {
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if (consumerOptions == null) {
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throw new IllegalArgumentException("Consumer options cannot be null.");
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}
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try {
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return DecryptionStreamFactory.create(inputStream, consumerOptions);
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} catch (WrongConsumingMethodException e) {
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inputStream.reset();
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return new VerifyCleartextSignaturesImpl()
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.onInputStream(inputStream)
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.withOptions(consumerOptions)
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.getVerificationStream();
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}
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}
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}
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}
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