/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cxf.rs.security.jose.jws;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
public class JwsInputStream extends FilterInputStream {
private JwsVerificationSignature signature;
private byte[] signatureBytes;
private boolean verifyOnLastRead;
public JwsInputStream(InputStream out,
JwsVerificationSignature signature,
byte[] signatureBytes,
boolean verifyOnLastRead) {
super(out);
this.signature = signature;
this.signatureBytes = signatureBytes;
this.verifyOnLastRead = verifyOnLastRead;
}
@Override
public int read() throws IOException {
int value = super.read();
if (value != -1) {
byte[] bytes = ByteBuffer.allocate(Integer.SIZE / 8).putInt(value).array();
signature.update(bytes, 0, bytes.length);
} else {
verify();
}
return value;
}
public int read(byte b[], int off, int len) throws IOException {
int num = in.read(b, off, len);
if (num != -1) {
signature.update(b, off, num);
} else {
verify();
}
return num;
}
private void verify() {
if (verifyOnLastRead && !signature.verify(signatureBytes)) {
throw new JwsException(JwsException.Error.INVALID_SIGNATURE);
}
}
}