package at.gv.egiz.pkcs15test; import java.util.Iterator; import java.util.NoSuchElementException; /* * Copyright 2009 Federal Chancellery Austria and * Graz University of Technology * * Licensed 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. */ public class TLVSequence implements Iterable { private byte[] bytes; public TLVSequence(byte[] bytes) { this.bytes = bytes; } @Override public Iterator iterator() { return new TLVIterator(); } public byte[] getValue(int tag) { for (TLV tlv : this) { if (tlv.getTag() == tag) { return tlv.getValue(); } } return null; } @Override public String toString() { StringBuilder sb = new StringBuilder(); for (TLV tlv : this) { sb.append(tlv).append('\n'); } return sb.toString(); } private class TLVIterator implements Iterator { private int pos = 0; @Override public boolean hasNext() { return (bytes.length - pos > 2); } @Override public TLV next() { if (hasNext()) { TLV tlv = new TLV(bytes, pos); pos += tlv.getLength() + 2; return tlv; } else { throw new NoSuchElementException(); } } @Override public void remove() { throw new UnsupportedOperationException(); } } }