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The Bouncy Castle Java APIs for the TLS, including a JSSE provider. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.tls;

import org.bouncycastle.util.Arrays;

class TlsSessionImpl implements TlsSession
{
    final byte[] sessionID;
    final SessionParameters sessionParameters;
    boolean resumable;

    TlsSessionImpl(byte[] sessionID, SessionParameters sessionParameters)
    {
        if (sessionID == null)
        {
            throw new IllegalArgumentException("'sessionID' cannot be null");
        }
        if (sessionID.length > 32)
        {
            throw new IllegalArgumentException("'sessionID' cannot be longer than 32 bytes");
        }

        this.sessionID = Arrays.clone(sessionID);
        this.sessionParameters = sessionParameters;
        this.resumable = sessionID.length > 0
            && null != sessionParameters
            && sessionParameters.isExtendedMasterSecret();
    }

    public synchronized SessionParameters exportSessionParameters()
    {
        return this.sessionParameters == null ? null : this.sessionParameters.copy();
    }

    public synchronized byte[] getSessionID()
    {
        return sessionID;
    }

    public synchronized void invalidate()
    {
        this.resumable = false;
    }

    public synchronized boolean isResumable()
    {
        return resumable;
    }
}