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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.tsp.ers;

import org.bouncycastle.operator.DigestCalculator;

/**
 * General interface for an ERSData data group object.
 */
public interface ERSData
{
    /**
     * Return the calculated hash for the Data
     *
     * @param digestCalculator  digest calculator to use.
     * @param previousChainHash hash from an earlier chain if it needs to be included.
     * @return calculated hash.
     */
    byte[] getHash(DigestCalculator digestCalculator, byte[] previousChainHash);
}