| /******************************************************************************* |
| * Copyright (c) 2007 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.verifier; |
| |
| 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.processors.Activator; |
| import org.eclipse.equinox.internal.provisional.p2.artifact.repository.IArtifactDescriptor; |
| import org.eclipse.equinox.internal.provisional.p2.artifact.repository.processing.ProcessingStep; |
| import org.eclipse.equinox.internal.provisional.p2.artifact.repository.processing.ProcessingStepDescriptor; |
| |
| public class MD5Verifier extends ProcessingStep { |
| |
| protected String md5Test; |
| private MessageDigest md5; |
| |
| public MD5Verifier() { |
| super(); |
| } |
| |
| public MD5Verifier(String md5Test) { |
| super(); |
| this.md5Test = md5Test; |
| basicInitialize(null); |
| } |
| |
| public void initialize(ProcessingStepDescriptor descriptor, IArtifactDescriptor context) { |
| super.initialize(descriptor, context); |
| String data = descriptor.getData(); |
| if (data.equals("download")) |
| md5Test = context.getProperty(IArtifactDescriptor.DOWNLOAD_MD5); |
| else if (data.equals("artifact")) |
| md5Test = context.getProperty(IArtifactDescriptor.ARTIFACT_MD5); |
| else |
| md5Test = data; |
| basicInitialize(descriptor); |
| } |
| |
| private void basicInitialize(ProcessingStepDescriptor descriptor) { |
| int code = (descriptor == null) ? IStatus.ERROR : descriptor.isRequired() ? IStatus.ERROR : IStatus.INFO; |
| if (md5Test == null || md5Test.length() != 32) |
| setStatus(new Status(code, Activator.ID, "MD5 value not available or incorrect size")); |
| try { |
| md5 = MessageDigest.getInstance("MD5"); |
| } catch (NoSuchAlgorithmException e) { |
| setStatus(new Status(code, Activator.ID, "Could not create MD5 algorithm", e)); |
| } |
| } |
| |
| public void write(int b) throws IOException { |
| if (b != -1) |
| md5.update((byte) b); |
| getDestination().write(b); |
| } |
| |
| public void close() throws IOException { |
| super.close(); |
| |
| 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(md5Test)) |
| setStatus(new Status(IStatus.ERROR, Activator.ID, "Error processing stream. MD5 hash is not as expected.")); |
| } |
| } |