| /** |
| * 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.kerby.asn1.parse; |
| |
| import org.apache.kerby.asn1.type.Asn1Object; |
| import org.apache.kerby.asn1.util.Asn1Util; |
| |
| import java.nio.ByteBuffer; |
| |
| public abstract class Asn1ParseResult extends Asn1Object { |
| private Asn1Header header; |
| private int bodyStart; |
| private int bodyEnd; |
| private ByteBuffer buffer; |
| |
| public Asn1ParseResult(Asn1Header header, |
| int bodyStart, ByteBuffer buffer) { |
| super(header.getTag()); |
| this.header = header; |
| this.bodyStart = bodyStart; |
| this.buffer = buffer; |
| |
| this.bodyEnd = isDefinitiveLength() ? bodyStart + header.getLength() : -1; |
| } |
| |
| public Asn1Header getHeader() { |
| return header; |
| } |
| |
| public int getBodyStart() { |
| return bodyStart; |
| } |
| |
| public int getBodyEnd() { |
| return bodyEnd; |
| } |
| |
| public void setBodyEnd(int bodyEnd) { |
| this.bodyEnd = bodyEnd; |
| } |
| |
| public ByteBuffer getBuffer() { |
| return buffer; |
| } |
| |
| public ByteBuffer getBodyBuffer() { |
| ByteBuffer result = buffer.duplicate(); |
| result.position(bodyStart); |
| |
| int end = getBodyEnd(); |
| if (end >= bodyStart) { |
| result.limit(end); |
| } |
| |
| return result; |
| } |
| |
| public byte[] readBodyBytes() { |
| ByteBuffer bodyBuffer = getBodyBuffer(); |
| byte[] result = new byte[bodyBuffer.remaining()]; |
| bodyBuffer.get(result); |
| return result; |
| } |
| |
| public boolean isDefinitiveLength() { |
| return header.isDefinitiveLength(); |
| } |
| |
| public int getEncodingLength() { |
| return getHeaderLength() + getBodyLength(); |
| } |
| |
| public int getHeaderLength() { |
| int bodyLen = getBodyLength(); |
| int headerLen = Asn1Util.lengthOfTagLength(header.getTag().tagNo()); |
| headerLen += (header.isDefinitiveLength() |
| ? Asn1Util.lengthOfBodyLength(bodyLen) : 1); |
| return headerLen; |
| } |
| |
| public int getOffset() { |
| return getBodyStart() - getHeaderLength(); |
| } |
| |
| public int getBodyLength() { |
| if (isDefinitiveLength()) { |
| return header.getLength(); |
| } else if (getBodyEnd() != -1) { |
| return getBodyEnd() - getBodyStart(); |
| } |
| return -1; |
| } |
| |
| |
| public boolean checkBodyFinished(int pos) { |
| return getBodyEnd() != -1 && pos >= getBodyEnd(); |
| } |
| |
| public String typeStr() { |
| return tag().typeStr() + " [" |
| + "tag=" + tag() |
| + ", off=" + getOffset() |
| + ", len=" + getHeaderLength() + "+" + getBodyLength() |
| + "] "; |
| } |
| } |