tbscertificatestructure.java

来自「《移动Agent技术》一书的所有章节源代码。」· Java 代码 · 共 192 行

package org.bouncycastle.asn1.x509;

import org.bouncycastle.asn1.*;
import org.bouncycastle.asn1.pkcs.*;

/**
 * <pre>
 * TBSCertificate ::= SEQUENCE {
 *      version          [ 0 ]  Version DEFAULT v1(0),
 *      serialNumber            CertificateSerialNumber,
 *      signature               AlgorithmIdentifier,
 *      issuer                  Name,
 *      validity                Validity,
 *      subject                 Name,
 *      subjectPublicKeyInfo    SubjectPublicKeyInfo,
 *      issuerUniqueID    [ 1 ] IMPLICIT UniqueIdentifier OPTIONAL,
 *      subjectUniqueID   [ 2 ] IMPLICIT UniqueIdentifier OPTIONAL,
 *      extensions        [ 3 ] Extensions OPTIONAL
 *      }
 * </pre>
 * <p>
 * Note: issuerUniqueID and subjectUniqueID are both deprecated by the IETF. This class
 * will parse them, but you really shouldn't be creating new ones.
 */
public class TBSCertificateStructure
    implements DEREncodable, X509ObjectIdentifiers, PKCSObjectIdentifiers
{
    DERConstructedSequence  seq;

    DERInteger              version;
    DERInteger              serialNumber;
    AlgorithmIdentifier     signature;
    X509Name                issuer;
    DERUTCTime              startDate, endDate;
    X509Name                subject;
    SubjectPublicKeyInfo    subjectPublicKeyInfo;
    DERBitString            issuerUniqueId;
    DERBitString            subjectUniqueId;
    X509Extensions          extensions;

    public TBSCertificateStructure(
        DERConstructedSequence  seq)
    {
        int         seqStart = 0;

        this.seq = seq;

        //
        // some certficates don't include a version number - we assume v1
        //
        if (seq.getObjectAt(0) instanceof DERTaggedObject)
        {
            version = (DERInteger)((DERTaggedObject)seq.getObjectAt(0)).getObject();
        }
        else
        {
            seqStart = -1;          // field 0 is missing!
            version = new DERInteger(0);
        }

        serialNumber = (DERInteger)seq.getObjectAt(seqStart + 1);

        if (seq.getObjectAt(seqStart + 2) instanceof AlgorithmIdentifier)
        {
            signature = (AlgorithmIdentifier)seq.getObjectAt(seqStart + 2);
        }
        else
        {
            signature = new AlgorithmIdentifier((DERConstructedSequence)seq.getObjectAt(seqStart + 2));
        }

        if (seq.getObjectAt(seqStart + 3) instanceof X509Name)
        {
            issuer = (X509Name)seq.getObjectAt(seqStart + 3);
        }
        else
        {
            issuer = new X509Name((DERConstructedSequence)seq.getObjectAt(seqStart + 3));
        }

        //
        // before and after dates
        //
        DERConstructedSequence  dates = (DERConstructedSequence)seq.getObjectAt(seqStart + 4);
        startDate = (DERUTCTime)dates.getObjectAt(0);
        endDate = (DERUTCTime)dates.getObjectAt(1);

        if (seq.getObjectAt(seqStart + 5) instanceof X509Name)
        {
            subject = (X509Name)seq.getObjectAt(seqStart + 5);
        }
        else
        {
            subject = new X509Name((DERConstructedSequence)seq.getObjectAt(seqStart + 5));
        }

        //
        // public key info.
        //
        if (seq.getObjectAt(seqStart + 6) instanceof SubjectPublicKeyInfo)
        {
            subjectPublicKeyInfo = (SubjectPublicKeyInfo)seq.getObjectAt(seqStart + 6);
        }
        else
        {
            subjectPublicKeyInfo = new SubjectPublicKeyInfo((DERConstructedSequence)seq.getObjectAt(seqStart + 6));
        }

        for (int extras = seq.getSize() - (seqStart + 6) - 1; extras > 0; extras--)
        {
            DERTaggedObject extra = (DERTaggedObject)seq.getObjectAt(seqStart + 6 + extras);

            switch (extra.getTagNo())
            {
            case 1:
                issuerUniqueId = (DERBitString)extra.getObject();
                break;
            case 2:
                subjectUniqueId = (DERBitString)extra.getObject();
                break;
            case 3:
                extensions = new X509Extensions((DERConstructedSequence)extra.getObject());
            }
        }
    }

    public int getVersion()
    {
        return version.getValue().intValue() + 1;
    }

    public DERInteger getVersionNumber()
    {
        return version;
    }

    public DERInteger getSerialNumber()
    {
        return serialNumber;
    }

    public AlgorithmIdentifier getSignature()
    {
        return signature;
    }

    public X509Name getIssuer()
    {
        return issuer;
    }

    public DERUTCTime getStartDate()
    {
        return startDate;
    }

    public DERUTCTime getEndDate()
    {
        return endDate;
    }

    public X509Name getSubject()
    {
        return subject;
    }

    public SubjectPublicKeyInfo getSubjectPublicKeyInfo()
    {
        return subjectPublicKeyInfo;
    }

    public DERBitString getIssuerUniqueId()
    {
        return issuerUniqueId;
    }

    public DERBitString getSubjectUniqueId()
    {
        return subjectUniqueId;
    }

    public X509Extensions getExtensions()
    {
        return extensions;
    }

    public DERObject getDERObject()
    {
        return seq;
    }
}