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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.tls.crypto.DHGroup;

/**
 * Interface for verifying explicit Diffie-Hellman group parameters.
 */
public interface TlsDHGroupVerifier
{
    /**
     * Check whether the given DH group is acceptable for use.
     * 
     * @param dhGroup the {@link DHGroup} to check
     * @return true if (and only if) the specified group is acceptable
     */
    boolean accept(DHGroup dhGroup);
}