mirror of
https://github.com/pgpainless/pgpainless.git
synced 2024-12-23 11:27:57 +01:00
Do some first prototype algorithm negotiation
This commit is contained in:
parent
909f0e7be3
commit
4e63313c91
4 changed files with 239 additions and 2 deletions
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@ -17,6 +17,12 @@ package org.pgpainless.encryption_signing;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import javax.annotation.Nonnull;
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import org.bouncycastle.openpgp.PGPException;
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@ -31,6 +37,8 @@ import org.pgpainless.algorithm.HashAlgorithm;
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import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
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import org.pgpainless.decryption_verification.OpenPgpMetadata;
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import org.pgpainless.exception.KeyValidationException;
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import org.pgpainless.key.SubkeyIdentifier;
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import org.pgpainless.key.info.KeyView;
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import org.pgpainless.key.protection.SecretKeyRingProtector;
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import org.pgpainless.policy.Policy;
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import org.pgpainless.util.Passphrase;
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@ -267,7 +275,33 @@ public class EncryptionBuilder implements EncryptionBuilderInterface {
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return encryptionAlgorithmOverride;
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}
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// TODO: Negotiation
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Map<SymmetricKeyAlgorithm, Integer> supportWeight = new LinkedHashMap<>();
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for (SubkeyIdentifier key : encryptionOptions.getKeyViews().keySet()) {
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KeyView keyView = encryptionOptions.getKeyViews().get(key);
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for (SymmetricKeyAlgorithm preferred : keyView.getPreferredSymmetricKeyAlgorithms()) {
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if (supportWeight.containsKey(preferred)) {
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supportWeight.put(preferred, supportWeight.get(preferred) + 1);
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} else {
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supportWeight.put(preferred, 1);
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}
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}
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}
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List<SymmetricKeyAlgorithm> scoreboard = new ArrayList<>(supportWeight.keySet());
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// Sort scoreboard by descending popularity
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Collections.sort(scoreboard, new Comparator<SymmetricKeyAlgorithm>() {
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@Override
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public int compare(SymmetricKeyAlgorithm t0, SymmetricKeyAlgorithm t1) {
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return -supportWeight.get(t0).compareTo(supportWeight.get(t1));
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}
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});
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for (SymmetricKeyAlgorithm mostWanted : scoreboard) {
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if (PGPainless.getPolicy().getSymmetricKeyEncryptionAlgorithmPolicy().isAcceptable(mostWanted)) {
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return mostWanted;
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}
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}
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return PGPainless.getPolicy().getSymmetricKeyEncryptionAlgorithmPolicy().getDefaultSymmetricKeyAlgorithm();
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}
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@ -32,6 +32,7 @@ import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
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import org.pgpainless.implementation.ImplementationFactory;
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import org.pgpainless.key.SubkeyIdentifier;
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import org.pgpainless.key.info.KeyRingInfo;
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import org.pgpainless.key.info.KeyView;
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import org.pgpainless.util.Passphrase;
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/**
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@ -66,6 +67,7 @@ public class EncryptionOptions {
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private final Set<PGPKeyEncryptionMethodGenerator> encryptionMethods = new LinkedHashSet<>();
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private final Set<SubkeyIdentifier> encryptionKeys = new LinkedHashSet<>();
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private final Map<SubkeyIdentifier, KeyRingInfo> keyRingInfo = new HashMap<>();
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private final Map<SubkeyIdentifier, KeyView> keyViews = new HashMap<>();
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private final EncryptionKeySelector encryptionKeySelector = encryptToFirstSubkey();
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private SymmetricKeyAlgorithm encryptionAlgorithmOverride = null;
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@ -131,6 +133,9 @@ public class EncryptionOptions {
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}
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for (PGPPublicKey encryptionSubkey : encryptionSubkeys) {
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SubkeyIdentifier keyId = new SubkeyIdentifier(key, encryptionSubkey.getKeyID());
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keyRingInfo.put(keyId, info);
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keyViews.put(keyId, new KeyView.ViaUserId(info, keyId, userId));
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addRecipientKey(key, encryptionSubkey);
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}
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@ -162,6 +167,9 @@ public class EncryptionOptions {
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}
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for (PGPPublicKey encryptionSubkey : encryptionSubkeys) {
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SubkeyIdentifier keyId = new SubkeyIdentifier(key, encryptionSubkey.getKeyID());
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keyRingInfo.put(keyId, info);
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keyViews.put(keyId, new KeyView.ViaKeyId(info, keyId));
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addRecipientKey(key, encryptionSubkey);
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}
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@ -204,14 +212,22 @@ public class EncryptionOptions {
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return this;
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}
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public Set<PGPKeyEncryptionMethodGenerator> getEncryptionMethods() {
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Set<PGPKeyEncryptionMethodGenerator> getEncryptionMethods() {
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return new HashSet<>(encryptionMethods);
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}
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Map<SubkeyIdentifier, KeyRingInfo> getKeyRingInfo() {
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return new HashMap<>(keyRingInfo);
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}
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public Set<SubkeyIdentifier> getEncryptionKeyIdentifiers() {
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return new HashSet<>(encryptionKeys);
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}
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public Map<SubkeyIdentifier, KeyView> getKeyViews() {
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return new HashMap<>(keyViews);
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}
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public SymmetricKeyAlgorithm getEncryptionAlgorithmOverride() {
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return encryptionAlgorithmOverride;
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}
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@ -0,0 +1,87 @@
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/*
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* Copyright 2021 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.pgpainless.key.info;
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import java.util.ArrayList;
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import java.util.LinkedHashSet;
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import java.util.List;
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import org.bouncycastle.openpgp.PGPSignature;
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import org.pgpainless.algorithm.CompressionAlgorithm;
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import org.pgpainless.algorithm.HashAlgorithm;
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import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
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import org.pgpainless.key.SubkeyIdentifier;
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import org.pgpainless.signature.subpackets.SignatureSubpacketsUtil;
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public abstract class KeyView {
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protected final KeyRingInfo info;
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protected final SubkeyIdentifier key;
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public KeyView(KeyRingInfo info, SubkeyIdentifier key) {
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this.info = info;
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this.key = key;
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}
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public abstract PGPSignature getSignatureWithPreferences();
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public List<SymmetricKeyAlgorithm> getPreferredSymmetricKeyAlgorithms() {
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List<SymmetricKeyAlgorithm> algos = SignatureSubpacketsUtil.parsePreferredSymmetricKeyAlgorithms(getSignatureWithPreferences());
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return new ArrayList<>(new LinkedHashSet<>(algos)); // remove duplicates
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}
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public List<HashAlgorithm> getPreferredHashAlgorithms() {
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List<HashAlgorithm> algos = SignatureSubpacketsUtil.parsePreferredHashAlgorithms(getSignatureWithPreferences());
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return new ArrayList<>(new LinkedHashSet<>(algos)); // remove duplicates
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}
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public List<CompressionAlgorithm> getPreferredCompressionAlgorithms() {
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List<CompressionAlgorithm> algos = SignatureSubpacketsUtil.parsePreferredCompressionAlgorithms(getSignatureWithPreferences());
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return new ArrayList<>(new LinkedHashSet<>(algos)); // remove duplicates
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}
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public static class ViaUserId extends KeyView {
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private final String userId;
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public ViaUserId(KeyRingInfo info, SubkeyIdentifier key, String userId) {
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super(info, key);
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this.userId = userId;
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}
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@Override
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public PGPSignature getSignatureWithPreferences() {
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return info.getLatestUserIdCertification(userId);
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}
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}
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public static class ViaKeyId extends KeyView {
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public ViaKeyId(KeyRingInfo info, SubkeyIdentifier key) {
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super(info, key);
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}
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@Override
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public PGPSignature getSignatureWithPreferences() {
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PGPSignature signature = info.getLatestDirectKeySelfSignature();
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if (signature != null) {
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return signature;
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}
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return info.getLatestUserIdCertification(info.getPrimaryUserId());
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}
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}
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}
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@ -0,0 +1,100 @@
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/*
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* Copyright 2018 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.pgpainless.encryption_signing;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import org.bouncycastle.openpgp.PGPException;
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import org.bouncycastle.openpgp.PGPPublicKeyRing;
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import org.junit.jupiter.api.Test;
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import org.pgpainless.PGPainless;
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import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
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public class RespectPreferredSymmetricAlgorithmDuringEncryptionTest {
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@Test
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public void onlyAES128() throws IOException, PGPException {
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// Key has [AES128] as preferred symm. algo on latest user-id cert
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String key = "-----BEGIN PGP ARMORED FILE-----\n" +
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"Comment: ASCII Armor added by openpgp-interoperability-test-suite\n" +
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"\n" +
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"xsDNBF2lnPIBDAC5cL9PQoQLTMuhjbYvb4Ncuuo0bfmgPRFywX53jPhoFf4Zg6mv\n" +
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"/seOXpgecTdOcVttfzC8ycIKrt3aQTiwOG/ctaR4Bk/t6ayNFfdUNxHWk4WCKzdz\n" +
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"/56fW2O0F23qIRd8UUJp5IIlN4RDdRCtdhVQIAuzvp2oVy/LaS2kxQoKvph/5pQ/\n" +
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"5whqsyroEWDJoSV0yOb25B/iwk/pLUFoyhDG9bj0kIzDxrEqW+7Ba8nocQlecMF3\n" +
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"X5KMN5kp2zraLv9dlBBpWW43XktjcCZgMy20SouraVma8Je/ECwUWYUiAZxLIlMv\n" +
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"9CurEOtxUw6N3RdOtLmYZS9uEnn5y1UkF88o8Nku890uk6BrewFzJyLAx5wRZ4F0\n" +
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"qV/yq36UWQ0JB/AUGhHVPdFf6pl6eaxBwT5GXvbBUibtf8YI2og5RsgTWtXfU7eb\n" +
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"SGXrl5ZMpbA6mbfhd0R8aPxWfmDWiIOhBufhMCvUHh1sApMKVZnvIff9/0Dca3wb\n" +
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"vLIwa3T4CyshfT0AEQEAAc0hQm9iIEJhYmJhZ2UgPGJvYkBvcGVucGdwLmV4YW1w\n" +
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"bGU+wsFTBBMBCgCHBYJgq9xiAgsHCRD7/MgqAV5zMEcUAAAAAAAeACBzYWx0QG5v\n" +
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"dGF0aW9ucy5zZXF1b2lhLXBncC5vcmdNgMRYEX46LCBpUimr3zIek/oZSVT+EcdR\n" +
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"Y4Rno2QSzQYVCgkICwIEFgIDAQIXgAIbAwIeARYhBNGmbhojsYLJmA94jPv8yCoB\n" +
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"XnMwAADsbAv/bpWiiT47IuGxe11aReA2ThLy8jwafKEOrHxiUvyJdG/s7Bn0QtqM\n" +
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"9G/16QDOWbSiXMD2vJYB7ml7oYlSxDS6oVd1bfGRsRbRr6N/wCTMXBaB4TsYqbcl\n" +
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"NOznt+RSRIWYKCHJDDEdBvuJmf+Mmi09NVHOupjOt51WiVWmm5GpVUl5789yBvN8\n" +
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"iei7I85KB/bXV0CfUgw9jx8BwAANPri+l4Br5fKMoheguHBm8BLPzWCfvCxZORq5\n" +
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"Nd9wLhEe+/7M2Y8AGzfn88XgGUXNOh7y8ZSD9AjK14UQilUg8IrYm7oJik29bVyh\n" +
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"UyY7sAJB5B7TxjE374krsOkl+lXe6bWDguJhrjIR0S0OWXmFpt06uDIOuI+f6ach\n" +
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"m0kbUELUiQOQ+4i17mph11WiQczT2iS7preLpI5cjQd1cIQczOjxDaRvNPvtxYne\n" +
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"ijUCkQzPwGAAcuXRe94wW3VtimwswLM5wmhzCgjv7uZMvEg6lHpVRWrJA6oXj6f1\n" +
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"MnufQ5Li2/zMwsEOBBMBCgA4AhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAFiEE\n" +
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"0aZuGiOxgsmYD3iM+/zIKgFeczAFAl2lnvoACgkQ+/zIKgFeczBvbAv/VNk90a6h\n" +
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"G8Od9xTzXxH5YRFUSGfIA1yjPIVOnKqhMwps2U+sWE3urL+MvjyQRlyRV8oY9IOh\n" +
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"Q5Esm6DOZYrTnE7qVETm1ajIAP2OFChEc55uH88x/anpPOXOJY7S8jbn3naC9qad\n" +
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"75BrZ+3g9EBUWiy5p8TykP05WSnSxNRt7vFKLfEB4nGkehpwHXOVF0CRNwYle42b\n" +
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"g8lpmdXFDcCZCi+qEbafmTQzkAqyzS3nCh3IAqq6Y0kBuaKLm2tSNUOlZbD+OHYQ\n" +
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"NZ5Jix7cZUzs6Xh4+I55NRWl5smrLq66yOQoFPy9jot/Qxikx/wP3MsAzeGaZSEP\n" +
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"c0fHp5G16rlGbxQ3vl8/usUV7W+TMEMljgwd5x8POR6HC8EaCDfVnUBCPi/Gv+eg\n" +
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"LjsIbPJZZEroiE40e6/UoCiQtlpQB5exPJYSd1Q1txCwueih99PHepsDhmUQKiAC\n" +
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"szNU+RRozAYau2VdHqnRJ7QYdxHDiH49jPK4NTMyb/tJh2TiIwcmsIpGzsDNBF2l\n" +
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"nPIBDADWML9cbGMrp12CtF9b2P6z9TTT74S8iyBOzaSvdGDQY/sUtZXRg21HWamX\n" +
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"nn9sSXvIDEINOQ6A9QxdxoqWdCHrOuW3ofneYXoG+zeKc4dC86wa1TR2q9vW+RMX\n" +
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"SO4uImA+Uzula/6k1DogDf28qhCxMwG/i/m9g1c/0aApuDyKdQ1PXsHHNlgd/Dn6\n" +
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"rrd5y2AObaifV7wIhEJnvqgFXDN2RXGjLeCOHV4Q2WTYPg/S4k1nMXVDwZXrvIsA\n" +
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"0YwIMgIT86Rafp1qKlgPNbiIlC1g9RY/iFaGN2b4Ir6GDohBQSfZW2+LXoPZuVE/\n" +
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"wGlQ01rh827KVZW4lXvqsge+wtnWlszcselGATyzqOK9LdHPdZGzROZYI2e8c+pa\n" +
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"LNDdVPL6vdRBUnkCaEkOtl1mr2JpQi5nTU+gTX4IeInC7E+1a9UDF/Y85ybUz8XV\n" +
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"8rUnR76UqVC7KidNepdHbZjjXCt8/Zo+Tec9JNbYNQB/e9ExmDntmlHEsSEQzFwz\n" +
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"j8sxH48AEQEAAcLA9gQYAQoAIBYhBNGmbhojsYLJmA94jPv8yCoBXnMwBQJdpZzy\n" +
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"AhsMAAoJEPv8yCoBXnMw6f8L/26C34dkjBffTzMj5Bdzm8MtF67OYneJ4TQMw7+4\n" +
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"1IL4rVcSKhIhk/3Ud5knaRtP2ef1+5F66h9/RPQOJ5+tvBwhBAcUWSupKnUrdVaZ\n" +
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"QanYmtSxcVV2PL9+QEiNN3tzluhaWO//rACxJ+K/ZXQlIzwQVTpNhfGzAaMVV9zp\n" +
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"f3u0k14itcv6alKY8+rLZvO1wIIeRZLmU0tZDD5HtWDvUV7rIFI1WuoLb+KZgbYn\n" +
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"3OWjCPHVdTrdZ2CqnZbG3SXw6awH9bzRLV9EXkbhIMez0deCVdeo+wFFklh8/5VK\n" +
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"2b0vk/+wqMJxfpa1lHvJLobzOP9fvrswsr92MA2+k901WeISR7qEzcI0Fdg8AyFA\n" +
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"ExaEK6VyjP7SXGLwvfisw34OxuZr3qmx1Sufu4toH3XrB7QJN8XyqqbsGxUCBqWi\n" +
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"f9RSK4xjzRTe56iPeiSJJOIciMP9i2ldI+KgLycyeDvGoBj0HCLO3gVaBe4ubVrj\n" +
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"5KjhX2PVNEJd3XZRzaXZE2aAMQ==\n" +
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"=d5ke\n" +
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"-----END PGP ARMORED FILE-----\n";
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PGPPublicKeyRing publicKeys = PGPainless.readKeyRing().publicKeyRing(key);
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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EncryptionStream encryptionStream = PGPainless.encryptAndOrSign().onOutputStream(out)
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.withOptions(
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ProducerOptions.encrypt(
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new EncryptionOptions()
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.addRecipient(publicKeys)
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));
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encryptionStream.close();
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assertEquals(SymmetricKeyAlgorithm.AES_128, encryptionStream.getResult().getEncryptionAlgorithm());
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}
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}
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