// Copyright (c) 2002 Graz University of Technology. All rights reserved.
// 
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// are permitted provided that the following conditions are met:
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//    "This product includes software developed by IAIK of Graz University of
//     Technology."
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//    Alternately, this acknowledgment may appear in the software itself, if and
//    wherever such third-party acknowledgments normally appear.
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// 4. The names "Graz University of Technology" and "IAIK of Graz University of
//    Technology" must not be used to endorse or promote products derived from this
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package iaik.pkcs.pkcs11.objects;

import iaik.pkcs.pkcs11.Session;
import iaik.pkcs.pkcs11.TokenException;
import iaik.pkcs.pkcs11.wrapper.Constants;

/**
 * Objects of this class represent WTLS public key certificates as specified by
 * PKCS#11 v2.20 Chap. 10.6.4.
 *
 * @author Florian Reimair
 * @version 1.0
 */
public class WTLSCertificate extends Certificate {

	/**
	 * The subject attribute of this certificate.
	 */
	protected ByteArrayAttribute subject_;

	/**
	 * The issuer attribute of this certificate.
	 */
	protected ByteArrayAttribute issuer_;

	/**
	 * The value attribute of this certificate; i.e. BER-encoded certificate.
	 */
	protected ByteArrayAttribute value_;

	/**
	 * This attribute gives the URL where the complete certificate can be obtained.
	 */
	protected CharArrayAttribute url_;

	/**
	 * SHA-1 hash of the subject public key.
	 */
	protected ByteArrayAttribute hashOfSubjectPublicKey_;

	/**
	 * SHA-1 hash of the issuer public key.
	 */
	protected ByteArrayAttribute hashOfIssuerPublicKey_;

	/**
	 * Deafult Constructor.
	 *
	 * @preconditions
	 * @postconditions
	 */
	public WTLSCertificate() {
		super();
		certificateType_.setLongValue(CertificateType.WTLS);
	}

	/**
	 * Called by getInstance to create an instance of a PKCS#11 WTLS public key
	 * certificate.
	 *
	 * @param session The session to use for reading attributes.
	 *                This session must have the appropriate rights; i.e.
	 *                it must be a user-session, if it is a private object.
	 * @param objectHandle The object handle as given from the PKCS#111 module.
	 * @exception TokenException If getting the attributes failed.
	 * @preconditions (session <> null)
	 * @postconditions
	 */
	protected WTLSCertificate(Session session, long objectHandle)
	    throws TokenException
	{
		super(session, objectHandle);
		certificateType_.setLongValue(CertificateType.WTLS);
	}

	/**
	 * The getInstance method of the Certificate class uses this method to create
	 * an instance of a PKCS#11 WTLS public key certificate.
	 *
	 * @param session The session to use for reading attributes.
	 *                This session must have the appropriate rights; i.e.
	 *                it must be a user-session, if it is a private object.
	 * @param objectHandle The object handle as given from the PKCS#111 module.
	 * @return The object representing the PKCS#11 object.
	 *         The returned object can be casted to the
	 *         according sub-class.
	 * @exception TokenException If getting the attributes failed.
	 * @preconditions (session <> null)
	 * @postconditions (result <> null) 
	 */
	public static Object getInstance(Session session, long objectHandle)
	    throws TokenException
	{
		return new WTLSCertificate(session, objectHandle);
	}

	/**
	 * Put all attributes of the given object into the attributes table of this
	 * object. This method is only static to be able to access invoke the
	 * implementation of this method for each class separately (see use in
	 * clone()).
	 *
	 * @param object The object to handle.
	 * @preconditions (object <> null)
	 * @postconditions
	 */
	protected static void putAttributesInTable(WTLSCertificate object) {
		if (object == null) {
			throw new NullPointerException("Argument \"object\" must not be null.");
		}

		object.attributeTable_.put(Attribute.SUBJECT, object.subject_);
		object.attributeTable_.put(Attribute.ISSUER, object.issuer_);
		object.attributeTable_.put(Attribute.VALUE, object.value_);
		object.attributeTable_.put(Attribute.URL, object.url_);
		object.attributeTable_.put(Attribute.HASH_OF_SUBJECT_PUBLIC_KEY,
		    object.hashOfSubjectPublicKey_);
		object.attributeTable_.put(Attribute.HASH_OF_ISSUER_PUBLIC_KEY,
		    object.hashOfIssuerPublicKey_);
	}

	/**
	 * Allocates the attribute objects for this class and adds them to the
	 * attribute table.
	 *
	 * @preconditions
	 * @postconditions
	 */
	protected void allocateAttributes() {
		super.allocateAttributes();

		subject_ = new ByteArrayAttribute(Attribute.SUBJECT);
		issuer_ = new ByteArrayAttribute(Attribute.ISSUER);
		value_ = new ByteArrayAttribute(Attribute.VALUE);
		url_ = new CharArrayAttribute(Attribute.URL);
		hashOfSubjectPublicKey_ = new ByteArrayAttribute(Attribute.HASH_OF_SUBJECT_PUBLIC_KEY);
		hashOfIssuerPublicKey_ = new ByteArrayAttribute(Attribute.HASH_OF_ISSUER_PUBLIC_KEY);

		putAttributesInTable(this);
	}

	/**
	 * Create a (deep) clone of this object.
	 *
	 * @return A clone of this object.
	 * @preconditions
	 * @postconditions (result <> null)
	 *                 and (result instanceof X509PublicKeyCertificate)
	 *                 and (result.equals(this))
	 */
	public java.lang.Object clone() {
		WTLSCertificate clone = (WTLSCertificate) super.clone();

		clone.subject_ = (ByteArrayAttribute) this.subject_.clone();
		clone.issuer_ = (ByteArrayAttribute) this.issuer_.clone();
		clone.value_ = (ByteArrayAttribute) this.value_.clone();
		clone.url_ = (CharArrayAttribute) this.url_.clone();
		clone.hashOfSubjectPublicKey_ = (ByteArrayAttribute) this.hashOfSubjectPublicKey_
		    .clone();
		clone.hashOfIssuerPublicKey_ = (ByteArrayAttribute) this.hashOfIssuerPublicKey_
		    .clone();

		putAttributesInTable(clone); // put all cloned attributes into the new table

		return clone;
	}

	/**
	 * Compares all member variables of this object with the other object.
	 * Returns only true, if all are equal in both objects.
	 *
	 * @param otherObject The other object to compare to.
	 * @return True, if other is an instance of this class and all member
	 *         variables of both objects are equal. False, otherwise.
	 * @preconditions
	 * @postconditions
	 */
	public boolean equals(java.lang.Object otherObject) {
		boolean equal = false;

		if (otherObject instanceof WTLSCertificate) {
			WTLSCertificate other = (WTLSCertificate) otherObject;
			equal = (this == other)
			    || (super.equals(other) && this.subject_.equals(other.subject_)
			        && this.issuer_.equals(other.issuer_) && this.value_.equals(other.value_)
			        && this.url_.equals(other.url_)
			        && this.hashOfSubjectPublicKey_.equals(other.hashOfSubjectPublicKey_) && this.hashOfIssuerPublicKey_
			          .equals(other.hashOfIssuerPublicKey_));
		}

		return equal;
	}

	/**
	 * Gets the subject attribute of this WTLS public key certificate.
	 *
	 * @return The subject attribute of this WTLS public key certificate.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public ByteArrayAttribute getSubject() {
		return subject_;
	}

	/**
	 * Gets the issuer attribute of this WTLS public key certificate.
	 *
	 * @return The issuer attribute of this WTLS public key certificate.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public ByteArrayAttribute getIssuer() {
		return issuer_;
	}

	/**
	 * Gets the value attribute of this WTLS public key certificate.
	 *
	 * @return The value attribute of this WTLS public key certificate.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public ByteArrayAttribute getValue() {
		return value_;
	}

	/**
	 * Get the URL attribute of this object.
	 *
	 * @return Contains the URL as a char array.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public CharArrayAttribute getUrl() {
		return url_;
	}

	/**
	 * Gets the hash of subject public key attribute of this WTLS public key certificate.
	 *
	 * @return The hash of subject public key attribute of this WTLS public key certificate.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public ByteArrayAttribute getHashOfSubjectPublicKey() {
		return hashOfSubjectPublicKey_;
	}

	/**
	 * Gets the hash of issuer public key attribute of this WTLS public key certificate.
	 *
	 * @return The hash of issuer public key attribute of this WTLS public key certificate.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public ByteArrayAttribute getHashOfIssuerPublicKey() {
		return hashOfIssuerPublicKey_;
	}

	/**
	 * The overriding of this method should ensure that the objects of this class
	 * work correctly in a hashtable.
	 *
	 * @return The hash code of this object.
	 * @preconditions
	 * @postconditions
	 */
	public int hashCode() {
		return issuer_.hashCode();
	}

	/**
	 * Read the values of the attributes of this object from the token.
	 *
	 * @param session The session handle to use for reading attributes.
	 *                This session must have the appropriate rights; i.e.
	 *                it must be a user-session, if it is a private object.
	 * @exception TokenException If getting the attributes failed.
	 * @preconditions (session <> null)
	 * @postconditions
	 */
	public void readAttributes(Session session)
	    throws TokenException
	{
		super.readAttributes(session);

		//    Object.getAttributeValue(session, objectHandle_, subject_);
		//    Object.getAttributeValue(session, objectHandle_, id_);
		//    Object.getAttributeValue(session, objectHandle_, issuer_);
		//    Object.getAttributeValue(session, objectHandle_, serialNumber_);
		//    Object.getAttributeValue(session, objectHandle_, value_);
		Object.getAttributeValues(session, objectHandle_, new Attribute[] { subject_,
		    issuer_, value_ });
		Object.getAttributeValues(session, objectHandle_, new Attribute[] { url_,
		    hashOfSubjectPublicKey_, hashOfIssuerPublicKey_ });
	}

	/**
	 * This method returns a string representation of the current object. The
	 * output is only for debugging purposes and should not be used for other
	 * purposes.
	 *
	 * @return A string presentation of this object for debugging output.
	 * @preconditions
	 * @postconditions (result <> null)
	 */
	public String toString() {
		StringBuffer buffer = new StringBuffer(256);

		buffer.append(super.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("Subject (DER, hex): ");
		buffer.append(subject_.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("Issuer (DER, hex): ");
		buffer.append(issuer_.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("Value (BER, hex): ");
		buffer.append(value_.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("URL: ");
		buffer.append(url_.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("Hash Of Subject Public Key: ");
		buffer.append(hashOfSubjectPublicKey_.toString());

		buffer.append(Constants.NEWLINE);
		buffer.append(Constants.INDENT);
		buffer.append("Hash Of Issuer Public Key: ");
		buffer.append(hashOfIssuerPublicKey_.toString());

		return buffer.toString();
	}

}