| /* |
| * 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. |
| */ |
| |
| /** |
| * @author Vladimir N. Molotkov, Stepan M. Mishura |
| * @version $Revision$ |
| */ |
| |
| package org.apache.harmony.security.asn1; |
| |
| import java.io.IOException; |
| |
| |
| /** |
| * This class represents ASN.1 Object Identifier type. |
| * |
| * @see <a href="http://asn1.elibel.tm.fr/en/standards/index.htm">ASN.1</a> |
| */ |
| public class ASN1Oid extends ASN1Primitive { |
| |
| /** default implementation */ |
| private static final ASN1Oid ASN1 = new ASN1Oid(); |
| |
| /** |
| * Constructs ASN.1 Object Identifier type |
| * |
| * The constructor is provided for inheritance purposes |
| * when there is a need to create a custom ASN.1 Object Identifier type. |
| * To get a default implementation it is recommended to use |
| * getInstance() method. |
| */ |
| public ASN1Oid() { |
| super(TAG_OID); |
| } |
| |
| /** |
| * Returns ASN.1 Object Identifier type default implementation |
| * |
| * The default implementation works with encoding |
| * that is represented as array of integers. |
| * |
| * @return ASN.1 Object Identifier type default implementation |
| */ |
| public static ASN1Oid getInstance() { |
| return ASN1; |
| } |
| |
| public Object decode(BerInputStream in) throws IOException { |
| in.readOID(); |
| |
| if (in.isVerify) { |
| return null; |
| } |
| return getDecodedObject(in); |
| } |
| |
| /** |
| * Extracts array of integers from BER input stream. |
| * |
| * @return array of integers |
| */ |
| @Override public Object getDecodedObject(BerInputStream in) throws IOException { |
| // Allocate and decode |
| int oidElement = in.oidElement; |
| int[] oid = new int[oidElement]; |
| for (int id = 1, i = 0; id < oid.length; id++, i++) { |
| int octet = in.buffer[in.contentOffset + i]; |
| oidElement = octet & 0x7F; |
| while ((octet & 0x80) != 0) { |
| i++; |
| octet = in.buffer[in.contentOffset + i]; |
| oidElement = oidElement << 7 | (octet & 0x7f); |
| } |
| oid[id] = oidElement; |
| } |
| // Special handling for the first packed OID element |
| if (oid[1] > 79) { |
| oid[0] = 2; |
| oid[1] = oid[1] - 80; |
| } else { |
| oid[0] = oid[1] / 40; |
| oid[1] = oid[1] % 40; |
| } |
| return oid; |
| } |
| |
| public void encodeContent(BerOutputStream out) { |
| out.encodeOID(); |
| } |
| |
| public void setEncodingContent(BerOutputStream out) { |
| int[] oid = (int[]) out.content; |
| |
| int length = 0; |
| |
| // first subidentifier |
| int elem = oid[0] * 40 + oid[1]; |
| if (elem == 0) { |
| length = 1; |
| } else { |
| for (; elem > 0; elem = elem >> 7) { |
| length++; |
| } |
| } |
| |
| // the rest of subidentifiers |
| for (int i = 2; i < oid.length; i++) { |
| if (oid[i] == 0) { |
| length++; |
| continue; |
| } |
| for (elem = oid[i]; elem > 0; elem = elem >> 7) { |
| length++; |
| } |
| } |
| out.length = length; |
| } |
| |
| private static final ASN1Oid STRING_OID = new ASN1Oid() { |
| @Override public Object getDecodedObject(BerInputStream in) throws IOException { |
| StringBuilder buf = new StringBuilder(); |
| |
| //Special handling for the first packed OID element |
| int octet = in.buffer[in.contentOffset]; |
| int element = octet & 0x7F; |
| |
| int index = 0; |
| while ((octet & 0x80) != 0) { |
| index++; |
| octet = in.buffer[in.contentOffset + index]; |
| element = element << 7 | (octet & 0x7F); |
| } |
| |
| if (element > 79) { |
| buf.append('2'); |
| buf.append('.'); |
| buf.append(element - 80); |
| } else { |
| buf.append(element / 40); |
| buf.append('.'); |
| buf.append(element % 40); |
| } |
| |
| // the rest of subidentifiers |
| for (int j = 2; j < in.oidElement; j++) { |
| buf.append('.'); |
| |
| index++; |
| octet = in.buffer[in.contentOffset + index]; |
| element = octet & 0x7F; |
| |
| while ((octet & 0x80) != 0) { |
| index++; |
| octet = in.buffer[in.contentOffset + index]; |
| element = element << 7 | (octet & 0x7f); |
| } |
| |
| buf.append(element); |
| } |
| |
| return buf.toString(); |
| } |
| |
| @Override public void setEncodingContent(BerOutputStream out) { |
| //FIXME this is a stub for a while |
| out.content = ObjectIdentifier.toIntArray((String) out.content); |
| super.setEncodingContent(out); |
| } |
| }; |
| |
| /** |
| * Returns ASN.1 Object Identifier type implementation |
| * |
| * This implementation works with encoding |
| * that is mapped to java.lang.String object. |
| * |
| * @return ASN.1 Object Identifier type implementation |
| */ |
| public static ASN1Oid getInstanceForString() { |
| return STRING_OID; |
| } |
| } |