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/*
 *  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 Alexander Y. Kleymenov
* @version $Revision$
*/

package org.apache.harmony.security.x509;

import org.apache.harmony.security.asn1.ASN1BitString;
import org.apache.harmony.security.asn1.ASN1Sequence;
import org.apache.harmony.security.asn1.ASN1Type;
import org.apache.harmony.security.asn1.BerInputStream;
import org.apache.harmony.security.asn1.BitString;
import org.apache.harmony.security.utils.Array;

/**
 * The class encapsulates the ASN.1 DER encoding/decoding work
 * with the X.509 certificate. Its ASN notation is as follows
 * (as specified in RFC 3280 -
 *  Internet X.509 Public Key Infrastructure.
 *  Certificate and Certificate Revocation List (CRL) Profile.
 *  http://www.ietf.org/rfc/rfc3280.txt):
 *
 * 
 *  Certificate  ::=  SEQUENCE  {
 *      tbsCertificate       TBSCertificate,
 *      signatureAlgorithm   AlgorithmIdentifier,
 *      signatureValue       BIT STRING
 *  }
 * 
*/ public final class Certificate { /** the value of tbsCertificate field of the structure */ private final TBSCertificate tbsCertificate; /** the value of signatureAlgorithm field of the structure */ private final AlgorithmIdentifier signatureAlgorithm; /** the value of signatureValue field of the structure */ private final byte[] signatureValue; /** the ASN.1 encoded form of Certificate */ private byte[] encoding; public Certificate(TBSCertificate tbsCertificate, AlgorithmIdentifier signatureAlgorithm, byte[] signatureValue) { this.tbsCertificate = tbsCertificate; this.signatureAlgorithm = signatureAlgorithm; this.signatureValue = new byte[signatureValue.length]; System.arraycopy(signatureValue, 0, this.signatureValue, 0, signatureValue.length); } private Certificate(TBSCertificate tbsCertificate, AlgorithmIdentifier signatureAlgorithm, byte[] signatureValue, byte[] encoding) { this(tbsCertificate, signatureAlgorithm, signatureValue); this.encoding = encoding; } /** * Returns the value of tbsCertificate field of the structure. */ public TBSCertificate getTbsCertificate() { return tbsCertificate; } /** * Returns the value of signatureValue field of the structure. */ public byte[] getSignatureValue() { return signatureValue.clone(); } @Override public String toString() { StringBuilder result = new StringBuilder(); result.append("X.509 Certificate:\n[\n"); tbsCertificate.dumpValue(result); result.append("\n Algorithm: ["); signatureAlgorithm.dumpValue(result); result.append(']'); result.append("\n Signature Value:\n"); result.append(Array.toString(signatureValue, "")); result.append(']'); return result.toString(); } /** * Returns ASN.1 encoded form of this X.509 TBSCertificate value. */ public byte[] getEncoded() { if (encoding == null) { encoding = Certificate.ASN1.encode(this); } return encoding; } /** * X.509 Certificate encoder/decoder. */ public static final ASN1Sequence ASN1 = new ASN1Sequence(new ASN1Type[] {TBSCertificate.ASN1, AlgorithmIdentifier.ASN1, ASN1BitString.getInstance()}) { @Override protected Object getDecodedObject(BerInputStream in) { Object[] values = (Object[]) in.content; return new Certificate( (TBSCertificate) values[0], (AlgorithmIdentifier) values[1], ((BitString) values[2]).bytes, // FIXME keep as BitString object in.getEncoded()); } @Override protected void getValues(Object object, Object[] values) { Certificate cert = (Certificate) object; values[0] = cert.tbsCertificate; values[1] = cert.signatureAlgorithm; values[2] = new BitString(cert.signatureValue, 0); } }; }




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