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/*******************************************************************************
* Copyright (c) 2008, 2017 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.artifact.repository.processing;
import java.io.IOException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.artifact.repository.Activator;
public class ZipVerifierStep extends ProcessingStep {
static final int[] ZIP_HEADER = new int[] {0x50, 0x4b, 0x03, 0x04};
private int valid = 0; //-1 indicates that it is not a zip, >3 indicates that we are done the verification
@Override
public void write(int b) throws IOException {
getDestination().write(b);
if (valid > 3)
return;
if (valid == -1) {
return;
}
if (b != ZIP_HEADER[valid++]) {
valid = -1;
setStatus(new Status(IStatus.ERROR, Activator.ID, Messages.ZipVerifierStep_invalid_archive));
return;
}
}
@Override
public void close() throws IOException {
if (valid > 3) {
setStatus(Status.OK_STATUS);
} else {
setStatus(new Status(IStatus.ERROR, Activator.ID, Messages.ZipVerifierStep_invalid_archive));
}
super.close();
}
}
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