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/*******************************************************************************
* Copyright (c) 2008, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.provisional.p2.engine;
import java.io.File;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.cert.Certificate;
import java.util.ArrayList;
import java.util.Iterator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.core.helpers.ServiceHelper;
import org.eclipse.equinox.internal.p2.engine.EngineActivator;
import org.eclipse.equinox.internal.provisional.p2.core.IServiceUI;
import org.eclipse.equinox.internal.provisional.p2.core.IServiceUI.TrustInfo;
import org.eclipse.osgi.service.security.TrustEngine;
import org.eclipse.osgi.signedcontent.*;
import org.eclipse.osgi.util.NLS;
import org.osgi.util.tracker.ServiceTracker;
public class CertificateChecker {
private ArrayList artifacts;
private ServiceTracker trustEngineTracker;
public CertificateChecker() {
artifacts = new ArrayList();
trustEngineTracker = new ServiceTracker(EngineActivator.getContext(), TrustEngine.class.getName(), null);
trustEngineTracker.open();
}
public IStatus start() {
return checkCertificates();
}
private IStatus checkCertificates() {
SignedContentFactory verifierFactory = (SignedContentFactory) ServiceHelper.getService(EngineActivator.getContext(), SignedContentFactory.class.getName());
IServiceUI serviceUI = (IServiceUI) ServiceHelper.getService(EngineActivator.getContext(), IServiceUI.class.getName());
SignedContent content = null;
SignerInfo[] signerInfo = null;
ArrayList untrusted = new ArrayList();
ArrayList unsigned = new ArrayList();
ArrayList untrustedChain = new ArrayList();
IStatus status = Status.OK_STATUS;
if (artifacts.size() == 0 || serviceUI == null)
return status;
TrustEngine trustEngine = (TrustEngine) trustEngineTracker.getService();
for (Iterator it = artifacts.iterator(); it.hasNext();) {
File artifact = (File) it.next();
try {
content = verifierFactory.getSignedContent(artifact);
if (!content.isSigned()) {
unsigned.add(artifact);
continue;
}
signerInfo = content.getSignerInfos();
} catch (GeneralSecurityException e) {
return new Status(IStatus.ERROR, EngineActivator.ID, Messages.CertificateChecker_SignedContentError, e);
} catch (IOException e) {
return new Status(IStatus.ERROR, EngineActivator.ID, Messages.CertificateChecker_SignedContentIOError, e);
}
for (int i = 0; i < signerInfo.length; i++) {
Certificate[] certificateChain = signerInfo[i].getCertificateChain();
try {
Certificate trustAnchor = trustEngine.findTrustAnchor(certificateChain);
if (trustAnchor == null) {
if (!untrusted.contains(certificateChain[0])) {
untrusted.add(certificateChain[0]);
untrustedChain.add(certificateChain);
}
}
} catch (IOException e) {
return new Status(IStatus.ERROR, EngineActivator.ID, Messages.CertificateChecker_KeystoreConnectionError, e);
}
}
}
String policy = getUnsignedContentPolicy();
//if there is unsigned content and we should never allow it, then fail without further checking certificates
if (!unsigned.isEmpty() && EngineActivator.UNSIGNED_FAIL.equals(policy))
return new Status(IStatus.ERROR, EngineActivator.ID, NLS.bind(Messages.CertificateChecker_UnsignedNotAllowed, unsigned));
String[] details;
// If we always allow unsigned content, or we don't have any, we don't prompt the user about it
if (EngineActivator.UNSIGNED_ALLOW.equals(policy) || unsigned.isEmpty())
details = null;
else {
details = new String[unsigned.size()];
for (int i = 0; i < details.length; i++) {
details[i] = unsigned.get(i).toString();
}
}
Certificate[][] unTrustedCertificateChains;
if (untrusted.isEmpty()) {
unTrustedCertificateChains = null;
} else {
unTrustedCertificateChains = new Certificate[untrustedChain.size()][];
for (int i = 0; i < untrustedChain.size(); i++) {
unTrustedCertificateChains[i] = (Certificate[]) untrustedChain.get(i);
}
}
// If there was no unsigned content, and nothing untrusted, no need to prompt.
if (details == null && unTrustedCertificateChains == null)
return status;
TrustInfo trustInfo = serviceUI.getTrustInfo(unTrustedCertificateChains, details);
// If user doesn't trust unsigned content, cancel the operation
if (!trustInfo.trustUnsignedContent())
return Status.CANCEL_STATUS;
Certificate[] trustedCertificates = trustInfo.getTrustedCertificates();
// If we had untrusted chains and nothing was trusted, cancel the operation
if (unTrustedCertificateChains != null && trustedCertificates == null) {
return new Status(IStatus.CANCEL, EngineActivator.ID, Messages.CertificateChecker_CertificateRejected);
}
// Anything that was trusted should be removed from the untrusted list
if (trustedCertificates != null) {
for (int i = 0; i < trustedCertificates.length; i++) {
untrusted.remove(trustedCertificates[i]);
}
}
// If there is still untrusted content, cancel the operation
if (untrusted.size() > 0)
return new Status(IStatus.CANCEL, EngineActivator.ID, Messages.CertificateChecker_CertificateRejected);
// If we should persist the trusted certificates, add them to the trust engine
if (trustInfo.persistTrust()) {
for (int i = 0; i < trustedCertificates.length; i++) {
try {
trustEngine.addTrustAnchor(trustedCertificates[i], trustedCertificates[i].toString());
} catch (IOException e) {
//just return an INFO so the user can proceed with the install
return new Status(IStatus.INFO, EngineActivator.ID, Messages.CertificateChecker_KeystoreConnectionError, e);
} catch (GeneralSecurityException e) {
return new Status(IStatus.INFO, EngineActivator.ID, Messages.CertificateChecker_CertificateError, e);
}
}
}
return status;
}
/**
* Return the policy on unsigned content.
*/
private String getUnsignedContentPolicy() {
String policy = EngineActivator.getContext().getProperty(EngineActivator.PROP_UNSIGNED_POLICY);
if (policy == null)
policy = EngineActivator.UNSIGNED_PROMPT;
return policy;
}
public void add(File toAdd) {
artifacts.add(toAdd);
}
public void add(Object[] toAdd) {
for (int i = 0; i < toAdd.length; i++) {
if (toAdd[i] instanceof File)
add((File) toAdd[i]);
}
}
}
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