| /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| ~ Licensed to the Apache Software Foundation (ASF) under one |
| ~ or more contributor license agreements. See the NOTICE file |
| ~ distributed with this work for additional information |
| ~ regarding copyright ownership. The ASF licenses this file |
| ~ to you under the Apache License, Version 2.0 (the |
| ~ "License"); you may not use this file except in compliance |
| ~ with the License. You may obtain a copy of the License at |
| ~ |
| ~ http://www.apache.org/licenses/LICENSE-2.0 |
| ~ |
| ~ Unless required by applicable law or agreed to in writing, |
| ~ software distributed under the License is distributed on an |
| ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| ~ KIND, either express or implied. See the License for the |
| ~ specific language governing permissions and limitations |
| ~ under the License. |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ |
| package org.apache.sling.cli.impl.pgp; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.bouncycastle.bcpg.ArmoredInputStream; |
| import org.bouncycastle.openpgp.PGPException; |
| import org.bouncycastle.openpgp.PGPObjectFactory; |
| import org.bouncycastle.openpgp.PGPPublicKey; |
| import org.bouncycastle.openpgp.PGPPublicKeyRing; |
| import org.bouncycastle.openpgp.PGPPublicKeyRingCollection; |
| import org.bouncycastle.openpgp.PGPSignature; |
| import org.bouncycastle.openpgp.PGPSignatureList; |
| import org.bouncycastle.openpgp.PGPUtil; |
| import org.bouncycastle.openpgp.operator.bc.BcKeyFingerprintCalculator; |
| import org.bouncycastle.openpgp.operator.bc.BcPGPContentVerifierBuilderProvider; |
| import org.bouncycastle.openpgp.operator.jcajce.JcaKeyFingerprintCalculator; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| |
| @Component(service = PGPSignaturesValidator.class) |
| public class PGPSignaturesValidator { |
| |
| private static final String KEYS_FILE = "/tmp/sling-keys.asc"; |
| private PGPPublicKeyRingCollection keyRing; |
| |
| public SignatureVerificationResult verify(Path artifact, Path signature) { |
| try ( |
| InputStream fileStream = Files.newInputStream(artifact) ; |
| InputStream signatureStream = Files.newInputStream(signature) |
| ) { |
| InputStream sigInputStream = PGPUtil.getDecoderStream(signatureStream); |
| PGPObjectFactory pgpObjectFactory = new PGPObjectFactory(sigInputStream, new BcKeyFingerprintCalculator()); |
| PGPSignatureList sigList = (PGPSignatureList) pgpObjectFactory.nextObject(); |
| PGPSignature pgpSignature = sigList.get(0); |
| PGPPublicKey key = keyRing.getPublicKey(pgpSignature.getKeyID()); |
| if (key == null) { |
| throw new IllegalStateException(String.format("Signature %s was not generated with any of the known keys.", |
| signature.getFileName())); |
| } |
| pgpSignature.init(new BcPGPContentVerifierBuilderProvider(), key); |
| byte[] buff = new byte[1024]; |
| int read; |
| while ((read = fileStream.read(buff)) != -1) { |
| pgpSignature.update(buff, 0, read); |
| } |
| fileStream.close(); |
| return new SignatureVerificationResult(pgpSignature.verify(), key); |
| } catch (PGPException | IOException e) { |
| throw new IllegalStateException(String.format("Unable to verify signature %s.", signature.getFileName()), e); |
| } |
| } |
| |
| @Activate |
| private void readKeyRing() { |
| Path keysFile = Paths.get(KEYS_FILE); |
| if (Files.notExists(keysFile)) { |
| throw new IllegalStateException(String.format("Sling keys file does not exist at %s.", KEYS_FILE)); |
| } |
| try (InputStream in = Files.newInputStream(keysFile)) { |
| InputStream bouncyIn = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in); |
| if (bouncyIn instanceof ArmoredInputStream) { |
| ArmoredInputStream as = (ArmoredInputStream) bouncyIn; |
| List<PGPPublicKeyRing> keyRings = new ArrayList<>(); |
| while (!as.isEndOfStream()) { |
| PGPPublicKeyRingCollection collection = new PGPPublicKeyRingCollection(as, new JcaKeyFingerprintCalculator()); |
| Iterator<PGPPublicKeyRing> readKeyRings = collection.getKeyRings(); |
| while (readKeyRings.hasNext()) { |
| PGPPublicKeyRing keyRing = readKeyRings.next(); |
| keyRings.add(keyRing); |
| } |
| } |
| if (!keyRings.isEmpty()) { |
| keyRing = new PGPPublicKeyRingCollection(keyRings); |
| } else { |
| throw new IllegalStateException(String.format("Sling keys file from %s does not contain any keys.", KEYS_FILE)); |
| } |
| } |
| } catch (IOException | PGPException e) { |
| throw new IllegalStateException(String.format("Cannot read Sling keys file at %s.", KEYS_FILE), e); |
| } |
| } |
| } |