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WIP: Add LayerMetadata class
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parent
ef33d9d584
commit
61949240b3
2 changed files with 149 additions and 124 deletions
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@ -29,7 +29,7 @@ public enum OpenPgpPacket {
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PSK(PacketTags.PUBLIC_SUBKEY),
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UATTR(PacketTags.USER_ATTRIBUTE),
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SEIPD(PacketTags.SYM_ENC_INTEGRITY_PRO),
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MOD(PacketTags.MOD_DETECTION_CODE),
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MDC(PacketTags.MOD_DETECTION_CODE),
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EXP_1(PacketTags.EXPERIMENTAL_1),
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EXP_2(PacketTags.EXPERIMENTAL_2),
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@ -1,3 +1,7 @@
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// 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.decryption_verification;
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import org.bouncycastle.bcpg.BCPGInputStream;
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@ -27,9 +31,12 @@ import org.bouncycastle.openpgp.operator.PBEDataDecryptorFactory;
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import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilderProvider;
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import org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory;
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import org.bouncycastle.openpgp.operator.SessionKeyDataDecryptorFactory;
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import org.bouncycastle.pqc.crypto.rainbow.Layer;
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import org.pgpainless.PGPainless;
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import org.pgpainless.algorithm.CompressionAlgorithm;
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import org.pgpainless.algorithm.EncryptionPurpose;
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import org.pgpainless.algorithm.OpenPgpPacket;
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import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
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import org.pgpainless.decryption_verification.automaton.InputAlphabet;
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import org.pgpainless.decryption_verification.automaton.PDA;
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import org.pgpainless.decryption_verification.automaton.StackAlphabet;
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@ -55,15 +62,22 @@ public class OpenPgpMessageInputStream extends InputStream {
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protected final PDA automaton = new PDA();
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protected final ConsumerOptions options;
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protected final OpenPgpMetadata.Builder resultBuilder;
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protected final BCPGInputStream bcpgIn;
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protected InputStream in;
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private boolean closed = false;
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private Signatures signatures;
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private LayerMetadata layerMetadata;
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public OpenPgpMessageInputStream(InputStream inputStream, ConsumerOptions options)
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throws IOException, PGPException {
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this(inputStream, options, null);
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}
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OpenPgpMessageInputStream(InputStream inputStream, ConsumerOptions options, LayerMetadata layerMetadata)
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throws PGPException, IOException {
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// TODO: Use BCPGInputStream.wrap(inputStream);
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if (inputStream instanceof BCPGInputStream) {
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this.bcpgIn = (BCPGInputStream) inputStream;
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@ -72,12 +86,35 @@ public class OpenPgpMessageInputStream extends InputStream {
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}
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this.options = options;
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this.resultBuilder = OpenPgpMetadata.getBuilder();
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this.signatures = new Signatures(options);
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this.signatures.addDetachedSignatures(options.getDetachedSignatures());
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consumePackets();
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}
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static class LayerMetadata {
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private CompressionAlgorithm compressionAlgorithm;
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private SymmetricKeyAlgorithm symmetricKeyAlgorithm;
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private LayerMetadata child;
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public LayerMetadata setCompressionAlgorithm(CompressionAlgorithm algorithm) {
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this.compressionAlgorithm = algorithm;
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return this;
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}
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public LayerMetadata setSymmetricEncryptionAlgorithm(SymmetricKeyAlgorithm algorithm) {
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this.symmetricKeyAlgorithm = algorithm;
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return this;
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}
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public LayerMetadata setChild(LayerMetadata child) {
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this.child = child;
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return this;
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}
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}
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/**
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* This method consumes OpenPGP packets from the current {@link BCPGInputStream}.
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* Once it reaches a "nested" OpenPGP packet (Literal Data, Compressed Data, Encrypted Data), it sets <pre>in</pre>
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@ -92,7 +129,7 @@ public class OpenPgpMessageInputStream extends InputStream {
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throws IOException, PGPException {
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System.out.println("Walk " + automaton);
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int tag;
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loop: while ((tag = getTag()) != -1) {
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loop: while ((tag = nextTag()) != -1) {
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OpenPgpPacket nextPacket = OpenPgpPacket.requireFromTag(tag);
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System.out.println(nextPacket);
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switch (nextPacket) {
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@ -108,7 +145,9 @@ public class OpenPgpMessageInputStream extends InputStream {
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case COMP:
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automaton.next(InputAlphabet.CompressedData);
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PGPCompressedData compressedData = new PGPCompressedData(bcpgIn);
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in = new OpenPgpMessageInputStream(compressedData.getDataStream(), options);
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LayerMetadata compressionLayer = new LayerMetadata();
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compressionLayer.setCompressionAlgorithm(CompressionAlgorithm.fromId(compressedData.getAlgorithm()));
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in = new OpenPgpMessageInputStream(compressedData.getDataStream(), options, compressionLayer);
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break loop;
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// One Pass Signatures
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@ -119,10 +158,10 @@ public class OpenPgpMessageInputStream extends InputStream {
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// Signatures - either prepended to the message, or corresponding to the One Pass Signatures
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case SIG:
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boolean isCorrespondingToOPS = automaton.peekStack() == StackAlphabet.ops;
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boolean isSigForOPS = automaton.peekStack() == StackAlphabet.ops;
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automaton.next(InputAlphabet.Signatures);
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PGPSignatureList signatureList = readSignatures();
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if (isCorrespondingToOPS) {
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if (isSigForOPS) {
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signatures.addOnePassCorrespondingSignatures(signatureList);
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} else {
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signatures.addPrependedSignatures(signatureList);
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@ -135,6 +174,43 @@ public class OpenPgpMessageInputStream extends InputStream {
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case SED:
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case SEIPD:
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automaton.next(InputAlphabet.EncryptedData);
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if (processEncryptedData()) {
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break loop;
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}
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throw new MissingDecryptionMethodException("No working decryption method found.");
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// Marker Packets need to be skipped and ignored
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case MARKER:
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bcpgIn.readPacket(); // skip
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break;
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// Key Packets are illegal in this context
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case SK:
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case PK:
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case SSK:
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case PSK:
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case TRUST:
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case UID:
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case UATTR:
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throw new MalformedOpenPgpMessageException("Illegal Packet in Stream: " + nextPacket);
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// MDC packet is usually processed by PGPEncryptedDataList, so it is very likely we encounter this
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// packet out of order
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case MDC:
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throw new MalformedOpenPgpMessageException("Unexpected Packet in Stream: " + nextPacket);
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// Experimental Packets are not supported
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case EXP_1:
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case EXP_2:
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case EXP_3:
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case EXP_4:
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throw new MalformedOpenPgpMessageException("Unsupported Packet in Stream: " + nextPacket);
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}
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}
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}
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private boolean processEncryptedData() throws IOException, PGPException {
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PGPEncryptedDataList encDataList = new PGPEncryptedDataList(bcpgIn);
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// TODO: Replace with !encDataList.isIntegrityProtected()
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@ -144,6 +220,7 @@ public class OpenPgpMessageInputStream extends InputStream {
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SortedESKs esks = new SortedESKs(encDataList);
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// Try session key
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if (options.getSessionKey() != null) {
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SessionKeyDataDecryptorFactory decryptorFactory = ImplementationFactory.getInstance()
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.getSessionKeyDataDecryptorFactory(options.getSessionKey());
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@ -153,11 +230,11 @@ public class OpenPgpMessageInputStream extends InputStream {
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if (esk instanceof PGPPBEEncryptedData) {
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PGPPBEEncryptedData skesk = (PGPPBEEncryptedData) esk;
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in = skesk.getDataStream(decryptorFactory);
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break loop;
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return true;
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} else if (esk instanceof PGPPublicKeyEncryptedData) {
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PGPPublicKeyEncryptedData pkesk = (PGPPublicKeyEncryptedData) esk;
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in = pkesk.getDataStream(decryptorFactory);
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break loop;
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return true;
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} else {
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throw new RuntimeException("Unknown ESK class type: " + esk.getClass().getName());
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}
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@ -174,7 +251,7 @@ public class OpenPgpMessageInputStream extends InputStream {
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try {
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InputStream decrypted = skesk.getDataStream(decryptorFactory);
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in = new OpenPgpMessageInputStream(decrypted, options);
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break loop;
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return true;
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} catch (PGPException e) {
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// password mismatch? Try next password
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}
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@ -198,7 +275,7 @@ public class OpenPgpMessageInputStream extends InputStream {
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try {
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InputStream decrypted = pkesk.getDataStream(decryptorFactory);
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in = new OpenPgpMessageInputStream(decrypted, options);
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break loop;
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return true;
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} catch (PGPException e) {
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// hm :/
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}
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@ -215,44 +292,18 @@ public class OpenPgpMessageInputStream extends InputStream {
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try {
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InputStream decrypted = pkesk.getDataStream(decryptorFactory);
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in = new OpenPgpMessageInputStream(decrypted, options);
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break loop;
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return true;
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} catch (PGPException e) {
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// hm :/
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}
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}
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}
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// TODO: try interactive password callbacks
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throw new MissingDecryptionMethodException("No working decryption method found.");
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case MARKER:
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bcpgIn.readPacket(); // skip marker packet
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break;
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// Key Packets are illegal in this context
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case SK:
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case PK:
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case SSK:
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case PSK:
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case TRUST:
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case UID:
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case UATTR:
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case MOD:
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throw new MalformedOpenPgpMessageException("Unexpected Packet in Stream: " + nextPacket);
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// Experimental Packets are not supported
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case EXP_1:
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case EXP_2:
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case EXP_3:
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case EXP_4:
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throw new MalformedOpenPgpMessageException("Unsupported Packet in Stream: " + nextPacket);
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}
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}
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// we did not yet succeed in decrypting any session key :/
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return false;
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}
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private int getTag() throws IOException {
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private int nextTag() throws IOException {
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try {
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return bcpgIn.nextPacketTag();
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} catch (IOException e) {
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@ -296,7 +347,7 @@ public class OpenPgpMessageInputStream extends InputStream {
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ByteArrayOutputStream buf = new ByteArrayOutputStream();
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BCPGOutputStream bcpgOut = new BCPGOutputStream(buf);
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int tag;
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while ((tag = getTag()) == PacketTags.ONE_PASS_SIGNATURE || tag == PacketTags.MARKER) {
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while ((tag = nextTag()) == PacketTags.ONE_PASS_SIGNATURE || tag == PacketTags.MARKER) {
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Packet packet = bcpgIn.readPacket();
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if (tag == PacketTags.ONE_PASS_SIGNATURE) {
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OnePassSignaturePacket sigPacket = (OnePassSignaturePacket) packet;
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@ -313,13 +364,13 @@ public class OpenPgpMessageInputStream extends InputStream {
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private PGPSignatureList readSignatures() throws IOException {
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ByteArrayOutputStream buf = new ByteArrayOutputStream();
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BCPGOutputStream bcpgOut = new BCPGOutputStream(buf);
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int tag = getTag();
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int tag = nextTag();
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while (tag == PacketTags.SIGNATURE || tag == PacketTags.MARKER) {
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Packet packet = bcpgIn.readPacket();
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if (tag == PacketTags.SIGNATURE) {
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SignaturePacket sigPacket = (SignaturePacket) packet;
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sigPacket.encode(bcpgOut);
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tag = getTag();
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tag = nextTag();
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}
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}
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bcpgOut.close();
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@ -356,20 +407,6 @@ public class OpenPgpMessageInputStream extends InputStream {
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throw new RuntimeException(e);
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}
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signatures.finish();
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/*
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if (in instanceof OpenPgpMessageInputStream) {
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in.close();
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in = null;
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} else {
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try {
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System.out.println("Read consume");
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consumePackets();
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signatures.finish();
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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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return r;
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}
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@ -394,18 +431,6 @@ public class OpenPgpMessageInputStream extends InputStream {
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throw new RuntimeException(e);
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}
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signatures.finish();
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/*
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if (in instanceof OpenPgpMessageInputStream) {
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in.close();
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in = null;
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} else {
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try {
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consumePackets();
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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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return r;
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}
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