// --- BEGIN COPYRIGHT BLOCK ---
// 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 2 of the License.
//
// 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, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cms.profile.constraint;

import java.io.IOException;
import java.util.Locale;

import netscape.security.x509.CertificateSubjectName;
import netscape.security.x509.X500Name;
import netscape.security.x509.X509CertInfo;

import com.netscape.certsrv.apps.CMS;
import com.netscape.certsrv.base.IConfigStore;
import com.netscape.certsrv.profile.EProfileException;
import com.netscape.certsrv.profile.ERejectException;
import com.netscape.certsrv.profile.IPolicyDefault;
import com.netscape.certsrv.profile.IProfile;
import com.netscape.certsrv.property.Descriptor;
import com.netscape.certsrv.property.IDescriptor;
import com.netscape.certsrv.request.IRequest;
import com.netscape.cms.profile.def.NoDefault;
import com.netscape.cms.profile.def.SubjectNameDefault;
import com.netscape.cms.profile.def.UserSubjectNameDefault;

/**
 * This class implements the subject name constraint.
 * It checks if the subject name in the certificate
 * template satisfies the criteria.
 *
 * @version $Revision$, $Date$
 */
public class SubjectNameConstraint extends EnrollConstraint {

    public static final String CONFIG_PATTERN = "pattern";

    public SubjectNameConstraint() {
        // configuration names
        addConfigName(CONFIG_PATTERN);
    }

    public void init(IProfile profile, IConfigStore config)
            throws EProfileException {
        super.init(profile, config);
    }

    public IDescriptor getConfigDescriptor(Locale locale, String name) {
        if (name.equals(CONFIG_PATTERN)) {
            return new Descriptor(IDescriptor.STRING,
                    null, null,
                    CMS.getUserMessage(locale, "CMS_PROFILE_SUBJECT_NAME_PATTERN"));
        } else {
            return null;
        }
    }

    public String getDefaultConfig(String name) {
        return null;
    }

    /**
     * Validates the request. The request is not modified
     * during the validation.
     */
    public void validate(IRequest request, X509CertInfo info)
            throws ERejectException {
        CMS.debug("SubjectNameConstraint: validate start");
        CertificateSubjectName sn = null;

        try {
            sn = (CertificateSubjectName) info.get(X509CertInfo.SUBJECT);
            CMS.debug("SubjectNameConstraint: validate cert subject =" +
                         sn.toString());
        } catch (Exception e) {
            throw new ERejectException(
                    CMS.getUserMessage(getLocale(request),
                            "CMS_PROFILE_SUBJECT_NAME_NOT_FOUND"));
        }
        X500Name sn500 = null;

        try {
            sn500 = (X500Name) sn.get(CertificateSubjectName.DN_NAME);
        } catch (IOException e) {
            throw new ERejectException(
                    CMS.getUserMessage(getLocale(request),
                            "CMS_PROFILE_SUBJECT_NAME_NOT_FOUND"));
        }
        if (sn500 == null) {
            CMS.debug("SubjectNameConstraint: validate() - sn500 is null");
            throw new ERejectException(
                    CMS.getUserMessage(getLocale(request),
                            "CMS_PROFILE_SUBJECT_NAME_NOT_FOUND"));
        } else {
            CMS.debug("SubjectNameConstraint: validate() - sn500 " +
                    CertificateSubjectName.DN_NAME + " = " +
                    sn500.toString());
        }
        if (!sn500.toString().matches(getConfig(CONFIG_PATTERN))) {
            CMS.debug("SubjectNameConstraint: validate() - sn500 not matching pattern " + getConfig(CONFIG_PATTERN));
            throw new ERejectException(
                    CMS.getUserMessage(getLocale(request),
                            "CMS_PROFILE_SUBJECT_NAME_NOT_MATCHED",
                            sn500.toString()));
        }
    }

    public String getText(Locale locale) {
        return CMS.getUserMessage(locale,
                "CMS_PROFILE_CONSTRAINT_SUBJECT_NAME_TEXT",
                getConfig(CONFIG_PATTERN));
    }

    public boolean isApplicable(IPolicyDefault def) {
        if (def instanceof NoDefault)
            return true;
        if (def instanceof SubjectNameDefault)
            return true;
        if (def instanceof UserSubjectNameDefault)
            return true;
        return false;
    }
}