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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.dvcs;

import java.io.OutputStream;

import org.bouncycastle.asn1.x509.DigestInfo;
import org.bouncycastle.operator.DigestCalculator;

public class MessageImprintBuilder
{
    private final DigestCalculator digestCalculator;

    public MessageImprintBuilder(DigestCalculator digestCalculator)
    {
        this.digestCalculator = digestCalculator;
    }

    public MessageImprint build(byte[] message)
        throws DVCSException
    {
        try
        {
            OutputStream dOut = digestCalculator.getOutputStream();

            dOut.write(message);

            dOut.close();

            return new MessageImprint(new DigestInfo(digestCalculator.getAlgorithmIdentifier(), digestCalculator.getDigest()));
        }
        catch (Exception e)
        {
            throw new DVCSException("unable to build MessageImprint: " + e.getMessage(), e);
        }
    }
}




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