de.tsenger.animamea.asn1.ChipAuthenticationInfo.java Source code

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Here is the source code for de.tsenger.animamea.asn1.ChipAuthenticationInfo.java

Source

/**
 *  Copyright 2011, Tobias Senger
 *  
 *  This file is part of animamea.
 *
 *  Animamea is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Animamea is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License   
 *  along with animamea.  If not, see <http://www.gnu.org/licenses/>.
*/

package de.tsenger.animamea.asn1;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;

/**
 * @author Tobias Senger (tobias@t-senger.de)
 * 
 */
public class ChipAuthenticationInfo extends ASN1Object {

    private ASN1ObjectIdentifier protocol = null;
    private ASN1Integer version = null;
    private ASN1Integer keyId = null;

    public ChipAuthenticationInfo(ASN1Sequence seq) {
        protocol = (ASN1ObjectIdentifier) seq.getObjectAt(0);
        version = (ASN1Integer) seq.getObjectAt(1);

        if (seq.size() > 2) {
            keyId = (ASN1Integer) seq.getObjectAt(2);
        }
    }

    public String getProtocolOID() {
        return protocol.toString();
    }

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

    public int getKeyId() {
        if (keyId == null)
            return -1; // optionales Feld keyId nicht vorhanden
        else
            return keyId.getPositiveValue().intValue();
    }

    @Override
    public String toString() {
        return "ChipAuthenticationInfo \n\tOID: " + getProtocolOID() + "\n\tVersion: " + getVersion()
                + (keyId != null ? "\n\tKeyId " + keyId.getPositiveValue().intValue() + "\n" : "\n");
    }

    /**
     * The definition of ChipAuthenticationInfo is
      * <pre>
      * ChipAuthenticationInfo ::= SEQUENCE {
      *      protocol   OBJECT IDENTIFIER(
     *               id-CA-DH-3DES-CBC-CBC |
     *               id-CA-DH-AES-CBC-CMAC-128 |
     *               id-CA-DH-AES-CBC-CMAC-192 |
     *               id-CA-DH-AES-CBC-CMAC-256 |
     *               id-CA-ECDH-3DES-CBC-CBC |
     *               id-CA-ECDH-AES-CBC-CMAC-128 |
     *               id-CA-ECDH-AES-CBC-CMAC-192 |
     *               id-CA-ECDH-AES-CBC-CMAC-256),
      *      version      INTEGER, -- MUST be 1 or 2
      *      keyID      INTEGER OPTIONAL
      * }
      * </pre>
     */
    @Override
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(protocol);
        v.add(version);
        if (keyId != null)
            v.add(keyId);

        return ASN1Sequence.getInstance(v);
    }

}