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/* 
 * This file is part of cert-signer
 * Copyright (c) 2024 Paolo Lulli.
 * 
 * This program 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, version 3.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */

package net.lulli.certsigner.util;

import net.lulli.certsigner.Settings;
import org.bouncycastle.jce.PKCS10CertificationRequest;
import org.bouncycastle.util.io.pem.PemObject;
import org.bouncycastle.util.io.pem.PemWriter;

import javax.security.auth.x500.X500Principal;
import java.io.StringWriter;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.util.Objects;

@Deprecated //Future versions should use org.bouncycastle.pkcs.PKCS10CertificationRequest
public class CSRManager {
    private final PKCS10CertificationRequest csr;
    private final X500Principal x500Principal;
    private final PrivateKey privateKey;
    private final PublicKey publicKey;

    private CSRManager(X500Principal x500Principal, PrivateKey privateKey, PublicKey publicKey) throws Exception {
        this.x500Principal = x500Principal;
        this.privateKey = privateKey;
        this.publicKey = publicKey;

        this.csr = new PKCS10CertificationRequest(
                Settings.SIGNATURE_ALGORITHM,
                //"SHA1withRSA",
                x500Principal,
                publicKey,
                null,
                privateKey
        );
    }


    public static CSRManager with(String subject, PrivateKey privateKey, PublicKey publicKey) throws Exception {
        Objects.requireNonNull(subject);
        Objects.requireNonNull(privateKey);
        Objects.requireNonNull(publicKey);

        var principal = new X500Principal(subject);
        return new CSRManager(principal, privateKey, publicKey);
    }

    public String pem() {
        try {
            var pemObject = new PemObject("CERTIFICATE REQUEST", csr.getEncoded());
            var str = new StringWriter();
            var pemWriter = new PemWriter(str);
            pemWriter.writeObject(pemObject);
            pemWriter.close();
            str.close();
            return str.toString();
        } catch (Exception e) {
            throw new IllegalStateException(e.getMessage());
        }
    }

    public PKCS10CertificationRequest certificateSigningRequest() {
        return this.csr;
    }
}