SpcSpOpusInfo.java

/*
 * Copyright 2012 Emmanuel Bourg
 *
 * 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.
 */

package net.jsign.asn1.authenticode;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * <pre>
 * SpcSpOpusInfo ::= SEQUENCE {
 *     programName             [0] EXPLICIT SpcString OPTIONAL,
 *     moreInfo                [1] EXPLICIT SpcLink OPTIONAL,
 * }
 * </pre>
 * 
 * @author Emmanuel Bourg
 * @since 1.0
 */
public class SpcSpOpusInfo extends ASN1Object {

    /**
     * This field contains the program description:
     * - If publisher chooses not to specify a description, the SpcString structure contains a zero-length program name.
     * - If the publisher chooses to specify a description, the SpcString structure contains a Unicode string.
     */
    private final String programName;

    /**
     * This field is set to an SPCLink structure that contains a URL for a Web
     * site with more information about the signer. The URL is an ASCII string.
     */
    private final SpcLink moreInfo;

    public SpcSpOpusInfo(String programName, String url) {
        this(programName, url != null ? new SpcLink(url) : null);
    }

    public SpcSpOpusInfo(String programName, SpcLink moreInfo) {
        this.programName = programName;
        this.moreInfo = moreInfo;
    }

    public String getProgramName() {
        return programName;
    }

    public SpcLink getMoreInfo() {
        return moreInfo;
    }

    @Override
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();
        
        if (programName != null) {
            v.add(new DERTaggedObject(true, 0, new SpcString(programName)));
        }
        
        if (moreInfo != null) {
            v.add(new DERTaggedObject(true, 1, moreInfo));
        }
        
        return new BERSequence(v);
    }

    public static SpcSpOpusInfo parse(ASN1Encodable encodable) {
        ASN1Sequence sequence = ASN1Sequence.getInstance(encodable);
        SpcString programName = null;
        SpcLink moreInfo = null;
        for (ASN1Encodable element : sequence) {
            ASN1TaggedObject taggedObject = ASN1TaggedObject.getInstance(element);
            switch (taggedObject.getTagNo()) {
                case 0:
                    programName = SpcString.parse(taggedObject.getExplicitBaseObject());
                    break;
                case 1:
                    moreInfo = SpcLink.parse((ASN1TaggedObject) taggedObject.getExplicitBaseObject());
                    break;
            }
        }
        return new SpcSpOpusInfo(programName != null ? programName.getString() : null, moreInfo);
    }
}