/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.mj.impl.security.common;

import java.util.Date;

import java.util.Calendar;

/**

 * MIDP authentication is build around X.509 Public Key Infrastructure so that

 * MIDlet suites are signed using public key certificates.

 * This class encapsulates a certificate info used in MIDP authentication

 */

public class Certificate implements javax.microedition.pki.Certificate

{

    private String issuer = null;

    private String subject = null;

    private String organization = null;

    private String notBefore = null;

    private String notAfter = null;

    private String serialNumber = null;

    private String fingerprint = null;

    private String algName = null;

    private String certType = null;

    private String version = null;

    private long timeNotAfter;

    private long timeNotBefore;

    public Certificate(String issuer, String subject, String organization, String notBefore, String notAfter, String serialNumber, String fingerprint)

    {

        this.issuer = issuer;

        this.subject = subject;

        this.organization = organization;

        this.notBefore = notBefore;

        this.notAfter = notAfter;

        this.serialNumber = serialNumber;

        this.fingerprint = fingerprint;

    }

    public Certificate(String issuer, String subject, long timenotBefore, long timenotAfter, String serialNumber, String algName, String version, String certType)

    {

        this.issuer = issuer;

        this.subject = subject;

        this.notBefore = notBefore;

        this.notAfter = notAfter;

        this.serialNumber = serialNumber;

        this.algName = algName;

        this.timeNotAfter = timenotAfter;

        this.timeNotBefore = timenotBefore;

        this.certType = certType;

        this.version = version;

    }

    public Certificate(Certificate otherCert)

    {

        if (otherCert != null)

        {

            this.issuer = otherCert.getIssuer();

            this.subject = otherCert.getSubject();

            this.organization = otherCert.getOrganization();

            this.notBefore = otherCert.getDateNotBefore();

            this.notAfter = otherCert.getDateNotAfter();

            this.serialNumber = otherCert.getSerialNumber();

            this.fingerprint = otherCert.getFingerprint();

        }

    }

    /**

     * Getter for the issuer of the certificate

     *

     * @return The name of the entity which issued the certificate

     */

    public String getIssuer()

    {

        return issuer;

    }

    /**

     * Getter for the certificate validity's start date

     *

     * @return The start date of the certificate's validity

     */

    public Date getValidFrom()

    {

        return str2Date(notBefore);

    }

    /**

     * Getter for the certificate validity's end date

     *

     * @return The end date of the certificate's validity

     */

    public Date getValidUntil()

    {

        return str2Date(notAfter);

    }

    /**

     * Getter for the serial number of the certificate

     *

     * @return The serial number of the certificate

     */

    public String getSerialNumber()

    {

        return serialNumber;

    }

    /**

     * Getter for the fingerprint of the certificate

     *

     * @return The fingerprint of the certificate

     */

    public String getFingerprint()

    {

        return fingerprint;

    }

    /**

     * Getter for the subject of the certificate

     *

     * @return The name of the entity to which the certificate has been issued

     */

    public String getSubject()

    {

        return subject;

    }

    /**

     * Getter for the organization of the certificate

     *

     * @return The name of the organization to which the certificate has been

     *         issued

     */

    public String getOrganization()

    {

        return organization;

    }

    /*

     * The format of the returned string is YYYYMMDDHHMMSS,

     * where YYYY represents the year,

     *       MM is the month (counting January as 01), and

     *       DD is the day of the month (01 to 31)

     *       HH is the hour (0-24)

     *       MM is the minutes (0-60)

     *       SS is the seconds (0-60)

     */

    public String getDateNotAfter()

    {

        return notAfter;

    }

    /*

     * The format of the returned string is YYYYMMDDHHMMSS,

     * where YYYY represents the year,

     *       MM is the month (counting January as 01), and

     *       DD is the day of the month (01 to 31)

     *       HH is the hour (0-24)

     *       MM is the minutes (0-60)

     *       SS is the seconds (0-60)

     */

    public String getDateNotBefore()

    {

        return notBefore;

    }

    /**

     * Gets the time before which this Certificate may not be used from the

     * validity period.

     *

     * @return the time

     */

    public long getNotBefore()

    {

        return timeNotBefore;

    }

    /**

     * Gets the time after which this Certificate may not be used from the

     * validity period.

     *

     * @return the time

     */

    public long getNotAfter()

    {

        return timeNotAfter;

    }

    /**

     * Get the type of the certificate

     *

     * @return the type field

     */

    public String getType()

    {

        return certType;

    }

    /**

     * Get the version of the certificate

     *

     * @return the version field

     */

    public String getVersion()

    {

        return version;

    }

    /**

     * Get the signature algorithm used for the certificate

     *

     * @return the alg name

     */

    public String getSigAlgName()

    {

        return algName;

    }

    /*

     * Returns the content of the fingerprint split into groups of 4 characters

     * separated by ' '

     *

     * @return The formatted fingerprint

     */

    public String getFormattedFingerprint()

    {

        if (fingerprint == null)

        {

            return null;

        }

        StringBuffer sb = new StringBuffer();

        for (int i=0; i<fingerprint.length(); i++)

        {

            sb.append(fingerprint.charAt(i));

            if ((i+1)%4 == 0)

            {

                // insert the separator

                sb.append(' ');

            }

        }

        return sb.toString();

    }

    /*

     * Formats the issuer according to following syntax:

     * CN", "O", "OU", "C", "ST", "L

     * where CN = common name

     *        O = organization name

     *       OU = organization unit name

     *        C = country name

     *       ST = state or province name

     *        L = locality name

     * e.g. Issuer, Org, Sub-org, FI, Unknown, Tampere

     */

    public String getFormattedIssuer()

    {

        return formatDN(getIssuer());

    }

    /*

     * Formats the subject according to following syntax:

     * CN", "O", "OU", "C", "ST", "L

     * where CN = common name

     *        O = organization name

     *       OU = organization unit name

     *        C = country name

     *       ST = state or province name

     *        L = locality name

     * e.g. subject, Org, Sub-org, FI, Unknown, Tampere

     */

    public String getFormattedSubject()

    {

        return formatDN(getSubject());

    }

    public String toString()

    {

        StringBuffer sb = new StringBuffer();

        sb.append("\nIssuer:").append(getIssuer())

        .append("\nSubject:").append(getSubject())

        .append("\nOrganization:").append(getOrganization())

        .append("\nValidFrom:").append(getDateNotBefore())

        .append("\nValidUntil:").append(getDateNotAfter())

        .append("\nSerialNumber:").append(getSerialNumber())

        .append("\nFingerprint:").append(getFingerprint());

        return sb.toString();

    }

    /*

     * Builds a Date object out of a string represented as YYYYMMDDHHMMSS

     * where YYYY represents the year,

     *       MM is the month (counting January as 01), and

     *       DD is the day of the month (01 to 31)

     *       HH is the hour (0-24)

     *       MM is the minutes (0-60)

     *       SS is the seconds (0-60)

     */

    private Date str2Date(String str)

    {

        if (str != null

                && str.length() == 14)

        {

            try

            {

                Calendar cal = Calendar.getInstance();

                cal.set(Calendar.YEAR, Integer.parseInt(str.substring(0,4)));

                cal.set(Calendar.HOUR, Integer.parseInt(str.substring(8,10)));

                cal.set(Calendar.MINUTE, Integer.parseInt(str.substring(10,12)));

                cal.set(Calendar.SECOND, Integer.parseInt(str.substring(12,14)));

                return cal.getTime();

            }

            catch (NumberFormatException e)

            {

            }

            catch (ArrayIndexOutOfBoundsException e) {}

        }

        return null;

    }

    /*

     * Formats a distinguished name (DN) according to following syntax:

     * CN", "O", "OU", "C", "ST", "L

     * where CN = common name

     *        O = organization name

     *       OU = organization unit name

     *        C = country name

     *       ST = state or province name

     *        L = locality name

     */

    private String formatDN(String DN)

    {

        if (DN != null)

        {

            StringBuffer buf = new StringBuffer();

            // common name

            String tmp = getToken(DN, "/CN=");

            if (tmp != null)

            {

                buf.append(tmp);

            }

            // organization name

            tmp = getToken(DN, "/O=");

            if (tmp != null)

            {

                if (buf.length() > 0)

                {

                    buf.append(", ");

                }

                buf.append(tmp);

            }

            // organization unit name

            tmp = getToken(DN, "/OU=");

            if (tmp != null)

            {

                if (buf.length() > 0)

                {

                    buf.append(", ");

                }

                buf.append(tmp);

            }

            // country name

            tmp = getToken(DN, "/C=");

            if (tmp != null)

            {

                if (buf.length() > 0)

                {

                    buf.append(", ");

                }

                buf.append(tmp);

            }

            // state or province name

            tmp = getToken(DN, "/ST=");

            if (tmp != null)

            {

                if (buf.length() > 0)

                {

                    buf.append(", ");

                }

                buf.append(tmp);

            }

            // locality name

            tmp = getToken(DN, "/L=");

            if (tmp != null)

            {

                if (buf.length() > 0)

                {

                    buf.append(", ");

                }

                buf.append(tmp);

            }

            return buf.toString();

        }

        return null;

    }

    private String getToken(String str, String sep)

    {

        int startIndex = str.indexOf(sep);

        if (startIndex != -1)

        {

            startIndex += sep.length();

            int endIndex = str.indexOf("/", startIndex);

            if (endIndex == -1)

            {

                endIndex = str.length();

            }

            return str.substring(startIndex, endIndex);

        }

        return null;

    }

}