org.bouncycastle.asn1.ess.ESSCertIDv2.java Source code

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Here is the source code for org.bouncycastle.asn1.ess.ESSCertIDv2.java

Source

package org.bouncycastle.asn1.ess;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.IssuerSerial;
import org.bouncycastle.util.Arrays;

public class ESSCertIDv2 extends ASN1Object {
    private AlgorithmIdentifier hashAlgorithm;
    private byte[] certHash;
    private IssuerSerial issuerSerial;
    private static final AlgorithmIdentifier DEFAULT_ALG_ID = new AlgorithmIdentifier(
            NISTObjectIdentifiers.id_sha256);

    public static ESSCertIDv2 getInstance(Object o) {
        if (o instanceof ESSCertIDv2) {
            return (ESSCertIDv2) o;
        } else if (o != null) {
            return new ESSCertIDv2(ASN1Sequence.getInstance(o));
        }

        return null;
    }

    private ESSCertIDv2(ASN1Sequence seq) {
        if (seq.size() > 3) {
            throw new IllegalArgumentException("Bad sequence size: " + seq.size());
        }

        int count = 0;

        if (seq.getObjectAt(0) instanceof ASN1OctetString) {
            // Default value
            this.hashAlgorithm = DEFAULT_ALG_ID;
        } else {
            this.hashAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(count++).toASN1Primitive());
        }

        this.certHash = ASN1OctetString.getInstance(seq.getObjectAt(count++).toASN1Primitive()).getOctets();

        if (seq.size() > count) {
            this.issuerSerial = IssuerSerial.getInstance(seq.getObjectAt(count));
        }
    }

    public ESSCertIDv2(byte[] certHash) {
        this(null, certHash, null);
    }

    public ESSCertIDv2(AlgorithmIdentifier algId, byte[] certHash) {
        this(algId, certHash, null);
    }

    public ESSCertIDv2(byte[] certHash, IssuerSerial issuerSerial) {
        this(null, certHash, issuerSerial);
    }

    public ESSCertIDv2(AlgorithmIdentifier algId, byte[] certHash, IssuerSerial issuerSerial) {
        if (algId == null) {
            // Default value
            this.hashAlgorithm = DEFAULT_ALG_ID;
        } else {
            this.hashAlgorithm = algId;
        }

        this.certHash = Arrays.clone(certHash);
        this.issuerSerial = issuerSerial;
    }

    public AlgorithmIdentifier getHashAlgorithm() {
        return this.hashAlgorithm;
    }

    public byte[] getCertHash() {
        return Arrays.clone(certHash);
    }

    public IssuerSerial getIssuerSerial() {
        return issuerSerial;
    }

    /**
     * <pre>
     * ESSCertIDv2 ::=  SEQUENCE {
     *     hashAlgorithm     AlgorithmIdentifier
     *              DEFAULT {algorithm id-sha256},
     *     certHash          Hash,
     *     issuerSerial      IssuerSerial OPTIONAL
     * }
     *
     * Hash ::= OCTET STRING
     *
     * IssuerSerial ::= SEQUENCE {
     *     issuer         GeneralNames,
     *     serialNumber   CertificateSerialNumber
     * }
     * </pre>
     */
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector(3);

        if (!hashAlgorithm.equals(DEFAULT_ALG_ID)) {
            v.add(hashAlgorithm);
        }

        v.add(new DEROctetString(certHash).toASN1Primitive());

        if (issuerSerial != null) {
            v.add(issuerSerial);
        }

        return new DERSequence(v);
    }

}