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/*******************************************************************************
* Copyright (c) 2015, 2018 Mykola Nikishov.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Mykola Nikishov - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.artifact.processors.checksum;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Optional;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.artifact.repository.Activator;
import org.eclipse.equinox.internal.p2.repository.helpers.ChecksumHelper;
import org.eclipse.equinox.p2.core.IProvisioningAgent;
import org.eclipse.equinox.p2.core.ProvisionException;
import org.eclipse.equinox.p2.repository.artifact.IArtifactDescriptor;
import org.eclipse.equinox.p2.repository.artifact.IProcessingStepDescriptor;
import org.eclipse.osgi.util.NLS;
final public class ChecksumVerifier extends MessageDigestProcessingStep {
private String expectedChecksum;
private String algorithmName;
private String algorithmId;
// public to access from tests
public ChecksumVerifier(String digestAlgorithm, String algorithmId, String expectedChecksum) {
this.algorithmName = digestAlgorithm;
this.algorithmId = algorithmId;
this.expectedChecksum = expectedChecksum;
basicInitialize(null);
}
@Override
public final void initialize(IProvisioningAgent agent, IProcessingStepDescriptor descriptor, IArtifactDescriptor context) {
super.initialize(agent, descriptor, context);
String data = descriptor.getData();
if (IArtifactDescriptor.DOWNLOAD_CHECKSUM.concat(".").concat(algorithmId).equals(data)) //$NON-NLS-1$
expectedChecksum = ChecksumHelper.getChecksums(context, IArtifactDescriptor.DOWNLOAD_CHECKSUM).get(algorithmId);
else if (IArtifactDescriptor.ARTIFACT_CHECKSUM.concat(".").concat(algorithmId).equals(data)) //$NON-NLS-1$
expectedChecksum = ChecksumHelper.getChecksums(context, IArtifactDescriptor.ARTIFACT_CHECKSUM).get(algorithmId);
else
expectedChecksum = data;
basicInitialize(descriptor);
}
private void basicInitialize(IProcessingStepDescriptor descriptor) {
int code = (descriptor == null) ? IStatus.ERROR : descriptor.isRequired() ? IStatus.ERROR : IStatus.INFO;
if (Optional.ofNullable(expectedChecksum).orElse("").isEmpty()) //$NON-NLS-1$
setStatus(new Status(code, Activator.ID, NLS.bind(Messages.Error_invalid_checksum, algorithmName, expectedChecksum)));
try {
messageDigest = MessageDigest.getInstance(algorithmName);
} catch (NoSuchAlgorithmException e) {
setStatus(new Status(code, Activator.ID, NLS.bind(Messages.Error_checksum_unavailable, algorithmName), e));
}
}
@Override
final protected void onClose(String digestString) {
// if the hashes don't line up set the status to error.
if (!digestString.equals(expectedChecksum))
// TODO like ProvisionException.ARTIFACT_MD5_NOT_MATCH but for any checksum
setStatus(new Status(IStatus.ERROR, Activator.ID, ProvisionException.ARTIFACT_MD5_NOT_MATCH, NLS.bind(Messages.Error_unexpected_checksum, new Object[] {algorithmName, expectedChecksum, digestString}), null));
}
}
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