| /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| ~ 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.FileOutputStream; |
| 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.apache.commons.io.IOUtils; |
| import org.apache.http.client.methods.CloseableHttpResponse; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.impl.client.CloseableHttpClient; |
| import org.apache.sling.cli.impl.ComponentContextHelper; |
| import org.apache.sling.cli.impl.http.HttpClientFactory; |
| 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.jetbrains.annotations.NotNull; |
| import org.osgi.service.component.ComponentContext; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| |
| @Component(service = PGPSignatureValidator.class) |
| public class PGPSignatureValidator { |
| |
| @Reference |
| private HttpClientFactory httpClientFactory; |
| |
| private static final String KEYS_FILE = "/tmp/sling-keys.asc"; |
| private PGPPublicKeyRingCollection keyRingCollection; |
| |
| public ValidationResult 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 = keyRingCollection.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); |
| } |
| return new ValidationResult(pgpSignature.verify(), key); |
| } catch (PGPException | IOException e) { |
| throw new IllegalStateException(String.format("Unable to verify signature %s.", signature.getFileName()), |
| e); |
| } |
| } |
| |
| @Activate |
| private void readKeyRing(ComponentContext componentContext) { |
| ComponentContextHelper helper = ComponentContextHelper.wrap(componentContext); |
| String keysFile = helper.getProperty("sling.keys", KEYS_FILE); |
| Path keysFilePath = Paths.get(keysFile); |
| if (Files.notExists(keysFilePath)) { |
| try { |
| try (CloseableHttpClient client = httpClientFactory.newClient()) { |
| HttpGet get = new HttpGet("https://people.apache.org/keys/group/sling.asc"); |
| try (CloseableHttpResponse response = client.execute(get)) { |
| try (InputStream content = response.getEntity().getContent()) { |
| IOUtils.copy(content, new FileOutputStream(keysFilePath.toFile())); |
| } |
| } |
| } |
| } catch (IOException e) { |
| throw new IllegalStateException( |
| "Cannot download Sling key file from https://people.apache.org/keys/group/sling.asc", e); |
| } |
| } |
| try (InputStream in = Files.newInputStream(keysFilePath)) { |
| 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()) { |
| keyRingCollection = new PGPPublicKeyRingCollection(keyRings); |
| } else { |
| throw new IllegalStateException(String.format("Sling keys file from %s does not contain any keys.", keysFile)); |
| } |
| } |
| } catch (IOException | PGPException e) { |
| throw new IllegalStateException(String.format("Cannot read Sling keys file at %s.", keysFile), e); |
| } |
| } |
| |
| public static class ValidationResult { |
| |
| private boolean valid; |
| private PGPPublicKey key; |
| |
| ValidationResult(boolean valid, @NotNull PGPPublicKey key) { |
| this.key = key; |
| this.valid = valid; |
| } |
| |
| public boolean isValid() { |
| return valid; |
| } |
| |
| @NotNull |
| public PGPPublicKey getKey() { |
| return key; |
| } |
| } |
| } |