com.vvote.thirdparty.ximix.util.SubjectPublicKeyInfoFactory.java Source code

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Here is the source code for com.vvote.thirdparty.ximix.util.SubjectPublicKeyInfoFactory.java

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/**
 * Copyright 2013 Crypto Workshop Pty Ltd
 *
 * 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 com.vvote.thirdparty.ximix.util;

import it.unisa.dia.gas.crypto.jpbc.signature.bls01.params.BLS01PublicKeyParameters;

import java.io.IOException;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERUTF8String;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;

/**
 * Factory to create SubjectPublicKeyInfo objects from public keys.
 */
public class SubjectPublicKeyInfoFactory {
    /**
     * Return a SubjectPublicKeyInfo object containing an encoding of BLS public key.
     *
     * @param keyParameters the public key to be encoded.
     * @return a SubjectPublicKeyInfo object containing the public key.
     * @throws java.io.IOException if the public key cannot be encoded.
     */
    public static SubjectPublicKeyInfo createSubjectPublicKeyInfo(BLS01PublicKeyParameters keyParameters)
            throws IOException {
        return new SubjectPublicKeyInfo(
                new AlgorithmIdentifier(XimixObjectIdentifiers.ximixAlgorithmsExperimental,
                        new DERSequence(new ASN1Encodable[] {
                                new DERUTF8String(keyParameters.getParameters().getCurveParameters().toString()),
                                new DEROctetString(keyParameters.getParameters().getG().toBytes()) })),
                keyParameters.getPk().toBytes());
    }
}