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A Java security provider for supporting ShangMi algorithms in public key infrastructure
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/*
 * Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package com.tencent.kona.sun.security.x509;

import java.io.IOException;
import java.io.InputStream;

import com.tencent.kona.sun.security.util.DerEncoder;
import com.tencent.kona.sun.security.util.DerInputStream;
import com.tencent.kona.sun.security.util.DerOutputStream;
import com.tencent.kona.sun.security.util.DerValue;

/**
 * This class defines the AlgorithmId for the Certificate.
 *
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 */
public class CertificateAlgorithmId implements DerEncoder {
    private AlgorithmId algId;

    public static final String NAME = "algorithmID";

    /**
     * Identifier to be used with get, set, and delete methods. When
     * using this identifier the associated object being passed in or
     * returned is an instance of AlgorithmId.
     * @see AlgorithmId
     */
    public static final String ALGORITHM = "algorithm";

    /**
     * Default constructor for the certificate attribute.
     *
     * @param algId the Algorithm identifier
     */
    public CertificateAlgorithmId(AlgorithmId algId) {
        this.algId = algId;
    }

    /**
     * Create the object, decoding the values from the passed DER stream.
     *
     * @param in the DerInputStream to read the serial number from.
     * @exception IOException on decoding errors.
     */
    public CertificateAlgorithmId(DerInputStream in) throws IOException {
        DerValue val = in.getDerValue();
        algId = AlgorithmId.parse(val);
    }

    /**
     * Create the object, decoding the values from the passed stream.
     *
     * @param in the InputStream to read the serial number from.
     * @exception IOException on decoding errors.
     */
    public CertificateAlgorithmId(InputStream in) throws IOException {
        DerValue val = new DerValue(in);
        algId = AlgorithmId.parse(val);
    }

    /**
     * Return the algorithm identifier as user readable string.
     */
    public String toString() {
        if (algId == null) return "";
        return (algId.toString() +
                ", OID = " + (algId.getOID()).toString() + "\n");
    }

    /**
     * Encode the algorithm identifier in DER form to the stream.
     *
     * @param out the DerOutputStream to marshal the contents to.
     */
    @Override
    public void encode(DerOutputStream out) {
        algId.encode(out);
    }

    /**
     * Get the AlgorithmId value.
     */
    public AlgorithmId getAlgId() throws IOException {
        return algId;
    }
}