66 lines
2.2 KiB
Java
66 lines
2.2 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.IOException;
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import java.io.InputStream;
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import javax.annotation.Nonnull;
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import org.bouncycastle.util.io.Streams;
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/**
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* Decryption Stream that handles updating and verification of detached signatures,
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* as well as verification of integrity-protected input streams once the stream gets closed.
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*/
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public class DecryptionStream extends CloseForResultInputStream {
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private final InputStream inputStream;
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private final IntegrityProtectedInputStream integrityProtectedInputStream;
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private final InputStream armorStream;
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/**
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* Create an input stream that handles decryption and - if necessary - integrity protection verification.
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*
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* @param wrapped underlying input stream
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* @param resultBuilder builder for decryption metadata like algorithms, recipients etc.
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* @param integrityProtectedInputStream in case of data encrypted using SEIP packet close this stream to check integrity
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* @param armorStream armor stream to verify CRC checksums
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*/
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DecryptionStream(@Nonnull InputStream wrapped,
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@Nonnull OpenPgpMetadata.Builder resultBuilder,
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IntegrityProtectedInputStream integrityProtectedInputStream,
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InputStream armorStream) {
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super(resultBuilder);
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this.inputStream = wrapped;
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this.integrityProtectedInputStream = integrityProtectedInputStream;
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this.armorStream = armorStream;
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}
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@Override
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public void close() throws IOException {
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if (armorStream != null) {
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Streams.drain(armorStream);
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}
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inputStream.close();
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if (integrityProtectedInputStream != null) {
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integrityProtectedInputStream.close();
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}
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super.close();
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}
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@Override
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public int read() throws IOException {
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int r = inputStream.read();
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return r;
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}
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@Override
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public int read(@Nonnull byte[] bytes, int offset, int length) throws IOException {
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int read = inputStream.read(bytes, offset, length);
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return read;
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}
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}
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