import org.bouncycastle.asn1.tsp.MessageImprint; //导入依赖的package包/类
/**
 * @deprecated use method taking ANS1ObjectIdentifier
 */
public TimeStampRequest generate(
    String      digestAlgorithmOID,
    byte[]      digest,
    BigInteger  nonce)
{
    if (digestAlgorithmOID == null)
    {
        throw new IllegalArgumentException("No digest algorithm specified");
    }

    ASN1ObjectIdentifier digestAlgOID = new ASN1ObjectIdentifier(digestAlgorithmOID);

    AlgorithmIdentifier algID = new AlgorithmIdentifier(digestAlgOID, DERNull.INSTANCE);
    MessageImprint messageImprint = new MessageImprint(algID, digest);

    Extensions  ext = null;
    
    if (!extGenerator.isEmpty())
    {
        ext = extGenerator.generate();
    }
    
    if (nonce != null)
    {
        return new TimeStampRequest(new TimeStampReq(messageImprint,
                reqPolicy, new ASN1Integer(nonce), certReq, ext));
    }
    else
    {
        return new TimeStampRequest(new TimeStampReq(messageImprint,
                reqPolicy, null, certReq, ext));
    }
}
 

import org.bouncycastle.asn1.tsp.MessageImprint; //导入依赖的package包/类
/**
 * Checks if the timestamp refers to this document.
 * @throws java.security.NoSuchAlgorithmException on error
 * @return true if it checks false otherwise
 * @since	2.1.6
 */
public boolean verifyTimestampImprint() throws NoSuchAlgorithmException {
    if (timeStampToken == null)
        return false;
    MessageImprint imprint = timeStampToken.getTimeStampInfo().toASN1Structure().getMessageImprint();
    byte[] md = MessageDigest.getInstance("SHA-1").digest(digest);
    byte[] imphashed = imprint.getHashedMessage();
    boolean res = Arrays.equals(md, imphashed);
    return res;
}