package org.spongycastle.crypto.tls;

import org.spongycastle.util.Arrays;

public class SecurityParameters
{
    int entity = -1;
    int cipherSuite = -1;
    short compressionAlgorithm = -1;
    int prfAlgorithm = -1;
    int verifyDataLength = -1;
    byte[] masterSecret = null;
    byte[] clientRandom = null;
    byte[] serverRandom = null;

    // TODO Keep these internal, since it's maybe not the ideal place for them
    short maxFragmentLength = -1;
    boolean truncatedHMac = false;
    boolean encryptThenMAC = false;

    void copySessionParametersFrom(SecurityParameters other)
    {
        this.entity = other.entity;
        this.cipherSuite = other.cipherSuite;
        this.compressionAlgorithm = other.compressionAlgorithm;
        this.prfAlgorithm = other.prfAlgorithm;
        this.verifyDataLength = other.verifyDataLength;
        this.masterSecret = Arrays.clone(other.masterSecret);
    }

    void clear()
    {
        if (this.masterSecret != null)
        {
            Arrays.fill(this.masterSecret, (byte)0);
            this.masterSecret = null;
        }
    }

    /**
     * @return {@link ConnectionEnd}
     */
    public int getEntity()
    {
        return entity;
    }

    /**
     * @return {@link CipherSuite}
     */
    public int getCipherSuite()
    {
        return cipherSuite;
    }

    /**
     * @return {@link CompressionMethod}
     */
    public short getCompressionAlgorithm()
    {
        return compressionAlgorithm;
    }

    /**
     * @return {@link PRFAlgorithm}
     */
    public int getPrfAlgorithm()
    {
        return prfAlgorithm;
    }

    public int getVerifyDataLength()
    {
        return verifyDataLength;
    }

    public byte[] getMasterSecret()
    {
        return masterSecret;
    }

    public byte[] getClientRandom()
    {
        return clientRandom;
    }

    public byte[] getServerRandom()
    {
        return serverRandom;
    }
}
