mirror of
https://github.com/pgpainless/pgpainless.git
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Add detailled logging to OpenPgpMessageInputStream
This commit is contained in:
parent
b7acb2a59c
commit
a27c0ff36e
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@ -59,6 +59,7 @@ import org.pgpainless.key.SubkeyIdentifier;
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import org.pgpainless.key.info.KeyRingInfo;
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import org.pgpainless.key.protection.SecretKeyRingProtector;
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import org.pgpainless.key.protection.UnlockSecretKey;
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import org.pgpainless.key.util.KeyIdUtil;
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import org.pgpainless.policy.Policy;
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import org.pgpainless.signature.SignatureUtils;
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import org.pgpainless.signature.consumer.OnePassSignatureCheck;
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@ -234,6 +235,7 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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// Marker Packets need to be skipped and ignored
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case MARKER:
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LOGGER.debug("Skipping Marker Packet");
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packetInputStream.readMarker();
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break;
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@ -263,6 +265,7 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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}
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private void processLiteralData() throws IOException {
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LOGGER.debug("Literal Data Packet at depth " + metadata.depth + " encountered");
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automaton.next(InputAlphabet.LiteralData);
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PGPLiteralData literalData = packetInputStream.readLiteralData();
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this.metadata.setChild(new MessageMetadata.LiteralData(
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@ -279,6 +282,7 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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MessageMetadata.CompressedData compressionLayer = new MessageMetadata.CompressedData(
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CompressionAlgorithm.fromId(compressedData.getAlgorithm()),
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metadata.depth + 1);
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LOGGER.debug("Compressed Data Packet (" + compressionLayer.algorithm + ") at depth " + metadata.depth + " encountered");
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InputStream decompressed = compressedData.getDataStream();
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nestedInputStream = new OpenPgpMessageInputStream(buffer(decompressed), options, compressionLayer, policy);
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}
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@ -286,6 +290,8 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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private void processOnePassSignature() throws PGPException, IOException {
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automaton.next(InputAlphabet.OnePassSignature);
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PGPOnePassSignature onePassSignature = packetInputStream.readOnePassSignature();
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LOGGER.debug("One-Pass-Signature Packet by key " + KeyIdUtil.formatKeyId(onePassSignature.getKeyID()) +
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"at depth " + metadata.depth + " encountered");
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signatures.addOnePassSignature(onePassSignature);
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}
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@ -294,42 +300,59 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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boolean isSigForOPS = automaton.peekStack() == StackAlphabet.ops;
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automaton.next(InputAlphabet.Signature);
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PGPSignature signature = packetInputStream.readSignature();
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long keyId = SignatureUtils.determineIssuerKeyId(signature);
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if (isSigForOPS) {
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LOGGER.debug("Signature Packet corresponding to One-Pass-Signature by key " +
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KeyIdUtil.formatKeyId(keyId) +
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" at depth " + metadata.depth + " encountered");
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signatures.leaveNesting(); // TODO: Only leave nesting if all OPSs of the nesting layer are dealt with
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signatures.addCorrespondingOnePassSignature(signature, metadata, policy);
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} else {
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LOGGER.debug("Prepended Signature Packet by key " +
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KeyIdUtil.formatKeyId(keyId) +
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" at depth " + metadata.depth + " encountered");
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signatures.addPrependedSignature(signature);
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}
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}
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private boolean processEncryptedData() throws IOException, PGPException {
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LOGGER.debug("Symmetrically Encrypted Data Packet at depth " + metadata.depth + " encountered");
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automaton.next(InputAlphabet.EncryptedData);
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PGPEncryptedDataList encDataList = packetInputStream.readEncryptedDataList();
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// TODO: Replace with !encDataList.isIntegrityProtected()
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// once BC ships it
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if (!encDataList.get(0).isIntegrityProtected()) {
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LOGGER.debug("Symmetrically Encrypted Data Packet is not integrity-protected and is therefore rejected.");
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throw new MessageNotIntegrityProtectedException();
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}
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SortedESKs esks = new SortedESKs(encDataList);
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LOGGER.debug("Symmetrically Encrypted Integrity-Protected Data has " +
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esks.skesks.size() + " SKESK(s) and " +
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(esks.pkesks.size() + esks.anonPkesks.size()) + " PKESK(s) from which " +
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esks.anonPkesks.size() + " PKESK(s) have an anonymous recipient");
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// Try custom decryptor factory
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// Try custom decryptor factories
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for (SubkeyIdentifier subkeyIdentifier : options.getCustomDecryptorFactories().keySet()) {
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LOGGER.debug("Attempt decryption with custom decryptor factory with key " + subkeyIdentifier);
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PublicKeyDataDecryptorFactory decryptorFactory = options.getCustomDecryptorFactories().get(subkeyIdentifier);
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for (PGPPublicKeyEncryptedData pkesk : esks.pkesks) {
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// find matching PKESK
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if (pkesk.getKeyID() != subkeyIdentifier.getSubkeyId()) {
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continue;
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}
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// attempt decryption
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if (decryptPKESKAndStream(subkeyIdentifier, decryptorFactory, pkesk)) {
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return true;
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}
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}
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}
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// Try session key
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// Try provided session key
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if (options.getSessionKey() != null) {
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LOGGER.debug("Attempt decryption with provided session key");
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SessionKey sessionKey = options.getSessionKey();
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throwIfUnacceptable(sessionKey.getAlgorithm());
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@ -340,6 +363,7 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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try {
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// TODO: Use BCs new API once shipped
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// see https://github.com/bcgit/bc-java/pull/1228 (discussion)
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PGPEncryptedData esk = esks.all().get(0);
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if (esk instanceof PGPPBEEncryptedData) {
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PGPPBEEncryptedData skesk = (PGPPBEEncryptedData) esk;
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@ -347,6 +371,7 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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encryptedData.sessionKey = sessionKey;
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IntegrityProtectedInputStream integrityProtected = new IntegrityProtectedInputStream(decrypted, skesk, options);
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nestedInputStream = new OpenPgpMessageInputStream(buffer(integrityProtected), options, encryptedData, policy);
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LOGGER.debug("Successfully decrypted data with provided session key");
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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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@ -354,20 +379,29 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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encryptedData.sessionKey = sessionKey;
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IntegrityProtectedInputStream integrityProtected = new IntegrityProtectedInputStream(decrypted, pkesk, options);
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nestedInputStream = new OpenPgpMessageInputStream(buffer(integrityProtected), options, encryptedData, policy);
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LOGGER.debug("Successfully decrypted data with provided session key");
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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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} catch (PGPException e) {
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// Session key mismatch?
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LOGGER.debug("Decryption using provided session key failed. Mismatched session key and message?", e);
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}
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}
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// Try passwords
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for (PGPPBEEncryptedData skesk : esks.skesks) {
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SymmetricKeyAlgorithm kekAlgorithm = SymmetricKeyAlgorithm.requireFromId(skesk.getAlgorithm());
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throwIfUnacceptable(kekAlgorithm);
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for (Passphrase passphrase : options.getDecryptionPassphrases()) {
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for (Passphrase passphrase : options.getDecryptionPassphrases()) {
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for (PGPPBEEncryptedData skesk : esks.skesks) {
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LOGGER.debug("Attempt decryption with provided passphrase");
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SymmetricKeyAlgorithm kekAlgorithm = SymmetricKeyAlgorithm.requireFromId(skesk.getAlgorithm());
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try {
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throwIfUnacceptable(kekAlgorithm);
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} catch (UnacceptableAlgorithmException e) {
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LOGGER.debug("Skipping SKESK with unacceptable encapsulation algorithm", e);
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continue;
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}
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PBEDataDecryptorFactory decryptorFactory = ImplementationFactory.getInstance()
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.getPBEDataDecryptorFactory(passphrase);
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@ -381,22 +415,25 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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// Try (known) secret keys
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for (PGPPublicKeyEncryptedData pkesk : esks.pkesks) {
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long keyId = pkesk.getKeyID();
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LOGGER.debug("Encountered PKESK with recipient " + KeyIdUtil.formatKeyId(keyId));
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PGPSecretKeyRing decryptionKeys = getDecryptionKey(keyId);
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if (decryptionKeys == null) {
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LOGGER.debug("Skipping PKESK because no matching key " + KeyIdUtil.formatKeyId(keyId) + " was provided");
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continue;
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}
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PGPSecretKey secretKey = decryptionKeys.getSecretKey(keyId);
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKeys, secretKey.getKeyID());
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LOGGER.debug("Attempt decryption using secret key " + decryptionKeyId);
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SecretKeyRingProtector protector = options.getSecretKeyProtector(decryptionKeys);
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// Postpone keys with missing passphrase
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if (!protector.hasPassphraseFor(keyId)) {
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LOGGER.debug("Missing passphrase for key " + decryptionKeyId + ". Postponing decryption until all other keys were tried");
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postponedDueToMissingPassphrase.add(new Tuple<>(secretKey, pkesk));
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continue;
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}
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PGPSecretKey decryptionKey = decryptionKeys.getSecretKey(keyId);
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKeys, decryptionKey.getKeyID());
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PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(decryptionKey, protector);
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PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(secretKey, protector);
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PublicKeyDataDecryptorFactory decryptorFactory = ImplementationFactory.getInstance()
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.getPublicKeyDataDecryptorFactory(privateKey);
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@ -408,16 +445,19 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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// try anonymous secret keys
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for (PGPPublicKeyEncryptedData pkesk : esks.anonPkesks) {
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for (Tuple<PGPSecretKeyRing, PGPSecretKey> decryptionKeyCandidate : findPotentialDecryptionKeys(pkesk)) {
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PGPSecretKeyRing decryptionKeys = decryptionKeyCandidate.getA();
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PGPSecretKey secretKey = decryptionKeyCandidate.getB();
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKeys, secretKey.getKeyID());
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LOGGER.debug("Attempt decryption of anonymous PKESK with key " + decryptionKeyId);
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SecretKeyRingProtector protector = options.getSecretKeyProtector(decryptionKeyCandidate.getA());
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if (!protector.hasPassphraseFor(secretKey.getKeyID())) {
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LOGGER.debug("Missing passphrase for key " + decryptionKeyId + ". Postponing decryption until all other keys were tried.");
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postponedDueToMissingPassphrase.add(new Tuple<>(secretKey, pkesk));
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continue;
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}
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PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(decryptionKeyCandidate.getB(), protector);
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PublicKeyDataDecryptorFactory decryptorFactory = ImplementationFactory.getInstance()
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.getPublicKeyDataDecryptorFactory(privateKey);
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKeyCandidate.getA(), privateKey.getKeyID());
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if (decryptPKESKAndStream(decryptionKeyId, decryptorFactory, pkesk)) {
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return true;
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@ -442,9 +482,10 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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PGPSecretKey secretKey = missingPassphrases.getA();
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long keyId = secretKey.getKeyID();
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PGPSecretKeyRing decryptionKey = getDecryptionKey(keyId);
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKey, keyId);
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LOGGER.debug("Attempt decryption with key " + decryptionKeyId + " while interactively requesting its passphrase");
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SecretKeyRingProtector protector = options.getSecretKeyProtector(decryptionKey);
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PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(secretKey, protector.getDecryptor(keyId));
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SubkeyIdentifier decryptionKeyId = new SubkeyIdentifier(decryptionKey, keyId);
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PublicKeyDataDecryptorFactory decryptorFactory = ImplementationFactory.getInstance()
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.getPublicKeyDataDecryptorFactory(privateKey);
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@ -458,10 +499,13 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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}
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// we did not yet succeed in decrypting any session key :/
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LOGGER.debug("Failed to decrypt encrypted data packet");
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return false;
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}
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private boolean decryptSKESKAndStream(PGPPBEEncryptedData skesk, PBEDataDecryptorFactory decryptorFactory) throws IOException, UnacceptableAlgorithmException {
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private boolean decryptSKESKAndStream(PGPPBEEncryptedData skesk, PBEDataDecryptorFactory decryptorFactory)
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throws IOException, UnacceptableAlgorithmException {
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try {
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InputStream decrypted = skesk.getDataStream(decryptorFactory);
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SessionKey sessionKey = new SessionKey(skesk.getSessionKey(decryptorFactory));
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@ -469,18 +513,19 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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MessageMetadata.EncryptedData encryptedData = new MessageMetadata.EncryptedData(
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sessionKey.getAlgorithm(), metadata.depth + 1);
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encryptedData.sessionKey = sessionKey;
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LOGGER.debug("Successfully decrypted data with passphrase");
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IntegrityProtectedInputStream integrityProtected = new IntegrityProtectedInputStream(decrypted, skesk, options);
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nestedInputStream = new OpenPgpMessageInputStream(buffer(integrityProtected), options, encryptedData, policy);
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return true;
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} catch (UnacceptableAlgorithmException e) {
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throw e;
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} catch (PGPException e) {
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// Password mismatch?
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LOGGER.debug("Decryption of encrypted data packet using password failed. Password mismatch?", e);
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}
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return false;
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}
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private boolean decryptPKESKAndStream(SubkeyIdentifier subkeyIdentifier,
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private boolean decryptPKESKAndStream(SubkeyIdentifier decryptionKeyId,
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PublicKeyDataDecryptorFactory decryptorFactory,
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PGPPublicKeyEncryptedData pkesk)
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throws IOException, UnacceptableAlgorithmException {
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@ -492,16 +537,17 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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MessageMetadata.EncryptedData encryptedData = new MessageMetadata.EncryptedData(
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SymmetricKeyAlgorithm.requireFromId(pkesk.getSymmetricAlgorithm(decryptorFactory)),
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metadata.depth + 1);
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encryptedData.decryptionKey = subkeyIdentifier;
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encryptedData.decryptionKey = decryptionKeyId;
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encryptedData.sessionKey = sessionKey;
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LOGGER.debug("Successfully decrypted data with key " + decryptionKeyId);
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IntegrityProtectedInputStream integrityProtected = new IntegrityProtectedInputStream(decrypted, pkesk, options);
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nestedInputStream = new OpenPgpMessageInputStream(buffer(integrityProtected), options, encryptedData, policy);
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return true;
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} catch (UnacceptableAlgorithmException e) {
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throw e;
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} catch (PGPException e) {
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LOGGER.debug("Decryption of encrypted data packet using secret key failed.", e);
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}
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return false;
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}
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@ -823,8 +869,10 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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SignatureValidator.signatureWasCreatedInBounds(options.getVerifyNotBefore(), options.getVerifyNotAfter())
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.verify(signature);
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SignatureVerifier.verifyOnePassSignature(signature, onePassSignature.getVerificationKeys().getPublicKey(signature.getKeyID()), onePassSignature, policy);
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LOGGER.debug("Acceptable signature by key " + verification.getSigningKey());
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layer.addVerifiedOnePassSignature(verification);
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} catch (SignatureValidationException e) {
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LOGGER.debug("Rejected signature by key " + verification.getSigningKey(), e);
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layer.addRejectedOnePassSignature(new SignatureVerification.Failure(verification, e));
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}
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break;
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@ -929,8 +977,10 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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detached.getSignature(),
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detached.getSigningKeyRing().getPublicKey(detached.getSigningKeyIdentifier().getKeyId()),
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policy, detached.getSignature().getCreationTime());
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LOGGER.debug("Acceptable signature by key " + verification.getSigningKey());
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layer.addVerifiedDetachedSignature(verification);
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} catch (SignatureValidationException e) {
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LOGGER.debug("Rejected signature by key " + verification.getSigningKey(), e);
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layer.addRejectedDetachedSignature(new SignatureVerification.Failure(verification, e));
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}
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}
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@ -944,8 +994,10 @@ public class OpenPgpMessageInputStream extends DecryptionStream {
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prepended.getSignature(),
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prepended.getSigningKeyRing().getPublicKey(prepended.getSigningKeyIdentifier().getKeyId()),
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policy, prepended.getSignature().getCreationTime());
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LOGGER.debug("Acceptable signature by key " + verification.getSigningKey());
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layer.addVerifiedPrependedSignature(verification);
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} catch (SignatureValidationException e) {
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LOGGER.debug("Rejected signature by key " + verification.getSigningKey(), e);
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layer.addRejectedPrependedSignature(new SignatureVerification.Failure(verification, e));
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}
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}
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@ -5,6 +5,8 @@
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package org.pgpainless.decryption_verification.automaton;
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import org.pgpainless.exception.MalformedOpenPgpMessageException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.Stack;
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@ -15,11 +17,11 @@ import static org.pgpainless.decryption_verification.automaton.StackAlphabet.ter
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public class PDA {
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private static int ID = 0;
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private static final Logger LOGGER = LoggerFactory.getLogger(PDA.class);
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/**
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* Set of states of the automaton.
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* Each state defines its valid transitions in their {@link NestingPDA.State#transition(InputAlphabet, NestingPDA)}
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* method.
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* Each state defines its valid transitions in their {@link State#transition(InputAlphabet, PDA)} method.
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*/
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public enum State {
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@ -199,7 +201,12 @@ public class PDA {
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}
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public void next(InputAlphabet input) throws MalformedOpenPgpMessageException {
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state = state.transition(input, this);
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try {
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state = state.transition(input, this);
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} catch (MalformedOpenPgpMessageException e) {
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LOGGER.debug("Unexpected Packet or Token '" + input + "' encountered. Message is malformed.", e);
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throw e;
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}
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}
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/**
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@ -30,4 +30,8 @@ public final class KeyIdUtil {
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return new BigInteger(longKeyId, 16).longValue();
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}
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public static String formatKeyId(long keyId) {
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return Long.toHexString(keyId).toUpperCase();
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}
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}
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