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// Copyright (c) 2002 Graz University of Technology. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. The end-user documentation included with the redistribution, if any, must
//    include the following acknowledgment:
//
//    "This product includes software developed by IAIK of Graz University of
//     Technology."
//
//    Alternately, this acknowledgment may appear in the software itself, if and
//    wherever such third-party acknowledgments normally appear.
//
// 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 software without prior written permission.
//
// 5. Products derived from this software may not be called "IAIK PKCS Wrapper",
//    nor may "IAIK" appear in their name, without prior written permission of
//    Graz University of Technology.
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package iaik.pkcs.pkcs11.parameters;

import iaik.pkcs.pkcs11.TokenRuntimeException;
import iaik.pkcs.pkcs11.Util;
import iaik.pkcs.pkcs11.wrapper.Constants;
import sun.security.pkcs11.wrapper.CK_SSL3_KEY_MAT_OUT;
import sun.security.pkcs11.wrapper.CK_SSL3_KEY_MAT_PARAMS;
import sun.security.pkcs11.wrapper.CK_SSL3_RANDOM_DATA;

/**
 * This class encapsulates parameters for the Mechanism.SSL3_KEY_AND_MAC_DERIVE
 * mechanism.
 *
 * @author Karl Scheibelhofer
 * @version 1.0
 * @invariants (randomInfo_ <> null)
 *             and (returnedKeyMaterial_ <> null)
 */
@SuppressWarnings("restriction")
public class SSL3KeyMaterialParameters implements Parameters {

    /**
     * The length (in bits) of the MACing keys agreed upon during the protocol
     * handshake phase.
     */
    protected long macSizeInBits_;

    /**
     * The length (in bits) of the secret keys agreed upon during the protocol
     * handshake phase.
     */
    protected long keySizeInBits_;

    /**
     * The length (in bits) of the IV agreed upon during the protocol handshake
     * phase. If no IV is required, the length should be set to 0.
     */
    protected long initializationVectorSizeInBits_;

    /**
     * Indicates whether the keys have to be derived for an export version of
     * the protocol.
     */
    protected boolean export_;

    /**
     * The client's and server's random data information.
     */
    protected SSL3RandomDataParameters randomInfo_;

    /**
     * Receives the handles for the keys generated and the IVs.
     */
    protected SSL3KeyMaterialOutParameters returnedKeyMaterial_;

    /**
     * Create a new SSL3KeyMaterialParameters object with the given
     * parameters.
     *
     * @param macSizeInBits
     *          The length (in bits) of the MACing keys agreed upon during the
     *          protocol handshake phase.
     * @param keySizeInBits
     *          The length (in bits) of the secret keys agreed upon during the
     *          protocol handshake phase.
     * @param initializationVectorSizeInBits
     *          The length (in bits) of the IV agreed upon during the protocol
     *          handshake phase. If no IV is required, the length should be set
     *          to 0.
     * @param export
     *          Indicates whether the keys have to be derived for an export
     *          version of the protocol.
     * @param randomInfo
     *          The client's and server's random data information.
     * @param returnedKeyMaterial
     *          Receives the handles for the keys generated and the IVs.
     * @preconditions (randomInfo <> null)
     *                and (returnedKeyMaterial <> null)
     * @postconditions
     */
    public SSL3KeyMaterialParameters(long macSizeInBits,
            long keySizeInBits,
            long initializationVectorSizeInBits,
            boolean export,
            SSL3RandomDataParameters randomInfo,
            SSL3KeyMaterialOutParameters returnedKeyMaterial) {
        macSizeInBits_ = macSizeInBits;
        keySizeInBits_ = keySizeInBits;
        initializationVectorSizeInBits_ = initializationVectorSizeInBits;
        export_ = export;
        randomInfo_ = Util.requireNonNull("randomInfo", randomInfo);
        returnedKeyMaterial_ = Util.requireNonNull("returnedKeyMaterial",
                returnedKeyMaterial);
    }

    /**
     * Create a (deep) clone of this object.
     *
     * @return A clone of this object.
     * @preconditions
     * @postconditions (result <> null)
     *                 and (result instanceof SSL3KeyMaterialParameters)
     *                 and (result.equals(this))
     */
    @Override
    public java.lang.Object clone() {
        SSL3KeyMaterialParameters clone;

        try {
            clone = (SSL3KeyMaterialParameters) super.clone();

            clone.randomInfo_ = (SSL3RandomDataParameters)
                    this.randomInfo_.clone();
            clone.returnedKeyMaterial_ = (SSL3KeyMaterialOutParameters)
                    this.returnedKeyMaterial_.clone();
        } catch (CloneNotSupportedException ex) {
            // this must not happen, because this class is cloneable
            throw new TokenRuntimeException(
                    "An unexpected clone exception occurred.", ex);
        }

        return clone;
    }

    /**
     * Get this parameters object as a CK_SSL3_KEY_MAT_PARAMS object.
     *
     * @return This object as a CK_SSL3_KEY_MAT_PARAMS object.
     * @preconditions
     * @postconditions (result <> null)
     */
    @Override
    public Object getPKCS11ParamsObject() {
        CK_SSL3_KEY_MAT_PARAMS params = new CK_SSL3_KEY_MAT_PARAMS(
                (int) macSizeInBits_,
                (int) keySizeInBits_,
                (int) initializationVectorSizeInBits_,
                export_,
                (CK_SSL3_RANDOM_DATA) randomInfo_.getPKCS11ParamsObject());
        params.pReturnedKeyMaterial = (CK_SSL3_KEY_MAT_OUT)
                returnedKeyMaterial_.getPKCS11ParamsObject();

        return params;
    }

    /**
     * Get the length (in bits) of the MACing keys agreed upon during the
     * protocol handshake phase.
     *
     * @return The length (in bits) of the MACing keys agreed upon during the
     *         protocol handshake phase.
     * @preconditions
     * @postconditions
     */
    public long getMacSizeInBits() {
        return macSizeInBits_;
    }

    /**
     * Get the length (in bits) of the secret keys agreed upon during the
     * protocol handshake phase.
     *
     * @return The length (in bits) of the secret keys agreed upon during the
     *         protocol handshake phase.
     * @preconditions
     * @postconditions
     */
    public long getKeySizeInBits() {
        return keySizeInBits_;
    }

    /**
     * Get the length (in bits) of the IV agreed upon during the protocol
     * handshake phase. If no IV is required, the length should be set to 0
     *
     * @return The length (in bits) of the IV agreed upon during the protocol
     *         handshake phase. If no IV is required, the length should be set
     *         to 0.
     * @preconditions
     * @postconditions
     */
    public long getInitializationVectorSizeInBits() {
        return initializationVectorSizeInBits_;
    }

    /**
     * Check whether the keys have to be derived for an export version of the
     * protocol.
     *
     * @return True, if the keys have to be derived for an export version of the
     *         protocol; false, otherwise.
     * @preconditions
     * @postconditions
     */
    public boolean isExport() {
        return export_;
    }

    /**
     * Get the client's and server's random data information.
     *
     * @return The client's and server's random data information.
     * @preconditions
     * @postconditions (result <> null)
     */
    public SSL3RandomDataParameters getRandomInfo() {
        return randomInfo_;
    }

    /**
     * Get the object that receives the handles for the keys generated and the
     * IVs.
     *
     * @return The object that receives the handles for the keys generated and
     *         the IVs.
     * @preconditions
     * @postconditions (result <> null)
     */
    public SSL3KeyMaterialOutParameters getReturnedKeyMaterial() {
        return returnedKeyMaterial_;
    }

    /**
     * Set the length (in bits) of the MACing keys agreed upon during the
     * protocol handshake phase.
     *
     * @param macSizeInBits
     *          The length (in bits) of the MACing keys agreed upon during the
     *          protocol handshake phase.
     * @preconditions
     * @postconditions
     */
    public void setMacSizeInBits(long macSizeInBits) {
        macSizeInBits_ = macSizeInBits;
    }

    /**
     * Set the length (in bits) of the secret keys agreed upon during the
     * protocol handshake phase.
     *
     * @param keySizeInBits
     *          The length (in bits) of the secret keys agreed upon during the
     *          protocol handshake phase.
     * @preconditions
     * @postconditions
     */
    public void setKeySizeInBits(long keySizeInBits) {
        keySizeInBits_ = keySizeInBits;
    }

    /**
     * Set the length (in bits) of the IV agreed upon during the protocol
     * handshake phase. If no IV is required, the length should be set to 0.
     *
     * @param initializationVectorSizeInBits
     *          The length (in bits) of the IV agreed upon during the protocol
     *          handshake phase. If no IV is required, the length should be set
     *          to 0.
     * @preconditions
     * @postconditions
     */
    public void setInitializationVectorSizeInBits(
            long initializationVectorSizeInBits) {
        initializationVectorSizeInBits_ = initializationVectorSizeInBits;
    }

    /**
     * Set whether the keys have to be derived for an export version of the
     * protocol.
     *
     * @param export
     *          True, if the keys have to be derived for an export version of
     *          the protocol; false, otherwise.
     * @preconditions
     * @postconditions
     */
    public void isExport(boolean export) {
        export_ = export;
    }

    /**
     * Set the client's and server's random data information.
     *
     * @param randomInfo
     *          The client's and server's random data information.
     * @preconditions (randomInfo <> null)
     * @postconditions
     */
    public void setRandomInfo(SSL3RandomDataParameters randomInfo) {
        randomInfo_ = Util.requireNonNull("randomInfo", randomInfo);
    }

    /**
     * Set the object that receives the handles for the keys generated and the
     * IVs.
     *
     * @param returnedKeyMaterial
     *          The object that receives the handles for the keys generated and
     *          the IVs.
     * @preconditions (returnedKeyMaterial <> null)
     * @postconditions
     */
    public void setReturnedKeyMaterial(
            SSL3KeyMaterialOutParameters returnedKeyMaterial) {
        returnedKeyMaterial_ = Util.requireNonNull("returnedKeyMaterial",
                returnedKeyMaterial);
    }

    /**
     * Returns the string representation of this object. Do not parse data from
     * this string, it is for debugging only.
     *
     * @return A string representation of this object.
     */
    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder();

        buffer.append(Constants.INDENT);
        buffer.append("MAC Size in Bits (dec): ");
        buffer.append(macSizeInBits_);

        buffer.append(Constants.NEWLINE_INDENT);
        buffer.append("Key Size in Bits (dec): ");
        buffer.append(keySizeInBits_);

        buffer.append(Constants.NEWLINE_INDENT);
        buffer.append("Initialization Vector Size in Bits (dec): ");
        buffer.append(initializationVectorSizeInBits_);

        buffer.append(Constants.NEWLINE_INDENT);
        buffer.append("For Export Version: ");
        buffer.append(export_);

        buffer.append(Constants.NEWLINE_INDENT);
        buffer.append("Client's and Server'S Random Information (hex): ");
        buffer.append(Constants.NEWLINE);
        buffer.append(randomInfo_);

        buffer.append(Constants.NEWLINE_INDENT);
        buffer.append("Handles of the generated Keys and IVs: ");
        buffer.append(returnedKeyMaterial_);

        return buffer.toString();
    }

    /**
     * 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
     */
    @Override
    public boolean equals(java.lang.Object otherObject) {
        if (this == otherObject) {
            return true;
        }

        if (!(otherObject instanceof SSL3KeyMaterialParameters)) {
            return false;
        }

        SSL3KeyMaterialParameters other
                = (SSL3KeyMaterialParameters) otherObject;
        return (this.macSizeInBits_ == other.macSizeInBits_)
                && (this.keySizeInBits_ == other.keySizeInBits_)
                && (this.initializationVectorSizeInBits_
                        == other.initializationVectorSizeInBits_)
                && (this.export_ == other.export_)
                && this.randomInfo_.equals(other.randomInfo_)
                && this.returnedKeyMaterial_.equals(other.returnedKeyMaterial_);
    }

    /**
     * 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
     */
    @Override
    public int hashCode() {
        return ((int) macSizeInBits_) ^ ((int) keySizeInBits_)
            ^ ((int) initializationVectorSizeInBits_) ^ randomInfo_.hashCode()
            ^ returnedKeyMaterial_.hashCode();
    }

}




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