129 lines
4.9 KiB
Java
129 lines
4.9 KiB
Java
// SPDX-FileCopyrightText: 2022 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.sop;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.charset.Charset;
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import java.util.ArrayList;
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import java.util.List;
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import org.bouncycastle.openpgp.PGPException;
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import org.bouncycastle.openpgp.PGPSecretKeyRing;
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import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
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import org.bouncycastle.util.io.Streams;
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import org.pgpainless.PGPainless;
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import org.pgpainless.algorithm.DocumentSignatureType;
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import org.pgpainless.encryption_signing.EncryptionStream;
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import org.pgpainless.encryption_signing.ProducerOptions;
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import org.pgpainless.encryption_signing.SigningOptions;
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import org.pgpainless.exception.KeyException;
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import org.pgpainless.key.OpenPgpFingerprint;
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import org.pgpainless.key.info.KeyRingInfo;
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import org.pgpainless.util.Passphrase;
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import sop.Ready;
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import sop.enums.InlineSignAs;
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import sop.exception.SOPGPException;
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import sop.operation.InlineSign;
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/**
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* Implementation of the <pre>inline-sign</pre> operation using PGPainless.
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*/
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public class InlineSignImpl implements InlineSign {
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private boolean armor = true;
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private InlineSignAs mode = InlineSignAs.binary;
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private final SigningOptions signingOptions = new SigningOptions();
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private final MatchMakingSecretKeyRingProtector protector = new MatchMakingSecretKeyRingProtector();
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private final List<PGPSecretKeyRing> signingKeys = new ArrayList<>();
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@Override
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public InlineSign mode(InlineSignAs mode) throws SOPGPException.UnsupportedOption {
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this.mode = mode;
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return this;
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}
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@Override
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public InlineSign noArmor() {
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this.armor = false;
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return this;
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}
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@Override
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public InlineSign key(InputStream keyIn) throws SOPGPException.KeyCannotSign, SOPGPException.BadData, IOException {
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PGPSecretKeyRingCollection keys = KeyReader.readSecretKeys(keyIn, true);
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for (PGPSecretKeyRing key : keys) {
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KeyRingInfo info = PGPainless.inspectKeyRing(key);
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if (!info.isUsableForSigning()) {
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throw new SOPGPException.KeyCannotSign("Key " + info.getFingerprint() + " does not have valid, signing capable subkeys.");
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}
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protector.addSecretKey(key);
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signingKeys.add(key);
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}
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return this;
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}
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@Override
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public InlineSign withKeyPassword(byte[] password) {
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String string = new String(password, Charset.forName("UTF8"));
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protector.addPassphrase(Passphrase.fromPassword(string));
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return this;
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}
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@Override
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public Ready data(InputStream data) throws SOPGPException.KeyIsProtected, SOPGPException.ExpectedText {
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for (PGPSecretKeyRing key : signingKeys) {
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try {
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if (mode == InlineSignAs.clearsigned) {
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signingOptions.addDetachedSignature(protector, key, DocumentSignatureType.CANONICAL_TEXT_DOCUMENT);
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} else {
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signingOptions.addInlineSignature(protector, key, modeToSigType(mode));
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}
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} catch (KeyException.UnacceptableSigningKeyException | KeyException.MissingSecretKeyException e) {
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throw new SOPGPException.KeyCannotSign("Key " + OpenPgpFingerprint.of(key) + " cannot sign.", e);
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} catch (PGPException e) {
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throw new SOPGPException.KeyIsProtected("Key " + OpenPgpFingerprint.of(key) + " cannot be unlocked.", e);
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}
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}
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ProducerOptions producerOptions = ProducerOptions.sign(signingOptions);
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if (mode == InlineSignAs.clearsigned) {
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producerOptions.setCleartextSigned();
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producerOptions.setAsciiArmor(true);
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} else {
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producerOptions.setAsciiArmor(armor);
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}
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return new Ready() {
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@Override
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public void writeTo(OutputStream outputStream) throws IOException, SOPGPException.NoSignature {
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try {
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EncryptionStream signingStream = PGPainless.encryptAndOrSign()
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.onOutputStream(outputStream)
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.withOptions(producerOptions);
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if (signingStream.isClosed()) {
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throw new IllegalStateException("EncryptionStream is already closed.");
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}
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Streams.pipeAll(data, signingStream);
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signingStream.close();
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// forget passphrases
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protector.clear();
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} catch (PGPException e) {
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throw new RuntimeException(e);
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}
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}
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};
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}
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private static DocumentSignatureType modeToSigType(InlineSignAs mode) {
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return mode == InlineSignAs.binary ? DocumentSignatureType.BINARY_DOCUMENT
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: DocumentSignatureType.CANONICAL_TEXT_DOCUMENT;
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}
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}
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