| /******************************************************************************* |
| * Copyright (c) 2007, 2008 compeople AG 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: |
| * compeople AG (Stefan Liebig) - initial API and implementation |
| * IBM Corporation - ongoing development |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.artifact.processors.md5; |
| |
| import java.io.IOException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| 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.provisional.p2.artifact.repository.processing.ProcessingStep; |
| import org.eclipse.equinox.p2.core.IProvisioningAgent; |
| import org.eclipse.equinox.p2.repository.artifact.IArtifactDescriptor; |
| import org.eclipse.equinox.p2.repository.artifact.IProcessingStepDescriptor; |
| import org.eclipse.osgi.util.NLS; |
| |
| public class MD5Verifier extends ProcessingStep { |
| |
| protected String expectedMD5; |
| private MessageDigest md5; |
| |
| public MD5Verifier() { |
| super(); |
| } |
| |
| public MD5Verifier(String expected) { |
| super(); |
| this.expectedMD5 = expected; |
| basicInitialize(null); |
| } |
| |
| //This handle the case where the MD5 verification is initiated by a processing step |
| public void initialize(IProvisioningAgent agent, IProcessingStepDescriptor descriptor, IArtifactDescriptor context) { |
| super.initialize(agent, descriptor, context); |
| String data = descriptor.getData(); |
| if (IArtifactDescriptor.DOWNLOAD_MD5.equals(data)) |
| expectedMD5 = context.getProperty(IArtifactDescriptor.DOWNLOAD_MD5); |
| else if (IArtifactDescriptor.ARTIFACT_MD5.equals(data)) |
| expectedMD5 = context.getProperty(IArtifactDescriptor.ARTIFACT_MD5); |
| else |
| expectedMD5 = data; |
| basicInitialize(descriptor); |
| } |
| |
| private void basicInitialize(IProcessingStepDescriptor descriptor) { |
| int code = (descriptor == null) ? IStatus.ERROR : descriptor.isRequired() ? IStatus.ERROR : IStatus.INFO; |
| if (expectedMD5 == null || expectedMD5.length() != 32) |
| setStatus(new Status(code, Activator.ID, NLS.bind(Messages.Error_invalid_hash, expectedMD5))); |
| try { |
| md5 = MessageDigest.getInstance("MD5"); //$NON-NLS-1$ |
| } catch (NoSuchAlgorithmException e) { |
| setStatus(new Status(code, Activator.ID, Messages.Error_MD5_unavailable, e)); |
| } |
| } |
| |
| public void write(int b) throws IOException { |
| md5.update((byte) b); |
| getDestination().write(b); |
| } |
| |
| public void close() throws IOException { |
| byte[] digest = md5.digest(); |
| StringBuffer buf = new StringBuffer(); |
| for (int i = 0; i < digest.length; i++) { |
| if ((digest[i] & 0xFF) < 0x10) |
| buf.append('0'); |
| buf.append(Integer.toHexString(digest[i] & 0xFF)); |
| } |
| |
| // if the hashes don't line up set the status to error. |
| if (!buf.toString().equals(expectedMD5)) |
| setStatus(new Status(IStatus.ERROR, Activator.ID, NLS.bind(Messages.Error_unexpected_hash, expectedMD5, buf))); |
| super.close(); |
| } |
| } |