Java DigestCalculator类代码示例

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
/**
 * Generates an OCSP request using BouncyCastle.
 * @param issuerCert	certificate of the issues
 * @param serialNumber	serial number
 * @return	an OCSP request
 * @throws OCSPException
 * @throws IOException
 */
private static OCSPReq generateOCSPRequest(X509Certificate issuerCert, BigInteger serialNumber) throws OCSPException, IOException, OperatorException, CertificateEncodingException {
    //Add provider BC
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    
    JcaDigestCalculatorProviderBuilder digestCalculatorProviderBuilder = new JcaDigestCalculatorProviderBuilder();
    DigestCalculatorProvider digestCalculatorProvider = digestCalculatorProviderBuilder.build();
    DigestCalculator digestCalculator = digestCalculatorProvider.get(CertificateID.HASH_SHA1);
    // Generate the id for the certificate we are looking for
    CertificateID id = new CertificateID(digestCalculator, new JcaX509CertificateHolder(issuerCert), serialNumber);
    
    // basic request generation with nonce
    OCSPReqBuilder gen = new OCSPReqBuilder();
    
    gen.addRequest(id);
    
    // create details for nonce extension
    Extension ext = new Extension(OCSPObjectIdentifiers.id_pkix_ocsp_nonce, false, new DEROctetString(new DEROctetString(PdfEncryption.createDocumentId()).getEncoded()));
    gen.setRequestExtensions(new Extensions(new Extension[]{ext}));
    
    return gen.build();
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public boolean isVerified(X509CertificateHolder certHolder, DigestCalculatorProvider digesterProvider)
    throws CMPException
{
    AlgorithmIdentifier digAlg = digestAlgFinder.find(certHolder.toASN1Structure().getSignatureAlgorithm());
    if (digAlg == null)
    {
        throw new CMPException("cannot find algorithm for digest from signature");
    }

    DigestCalculator digester;

    try
    {
        digester = digesterProvider.get(digAlg);
    }
    catch (OperatorCreationException e)
    {
        throw new CMPException("unable to create digester: " + e.getMessage(), e);
    }

    CMPUtil.derEncodeToStream(certHolder.toASN1Structure(), digester.getOutputStream());

    return Arrays.areEqual(certStatus.getCertHash().getOctets(), digester.getDigest());
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
/**
 * Calculate a RespID based on the public key of the responder.
 *
 * @param subjectPublicKeyInfo the info structure for the responder public key.
 * @param digCalc a SHA-1 digest calculator.
 * @throws OCSPException on exception creating ID.
 */
public RespID(
    SubjectPublicKeyInfo     subjectPublicKeyInfo,
    DigestCalculator         digCalc)
    throws OCSPException
{
    try
    {
        if (!digCalc.getAlgorithmIdentifier().equals(HASH_SHA1))
        {
            throw new IllegalArgumentException("only SHA-1 can be used with RespID");
        }

        OutputStream     digOut = digCalc.getOutputStream();

        digOut.write(subjectPublicKeyInfo.getPublicKeyData().getBytes());
        digOut.close();

        this.id = new ResponderID(new DEROctetString(digCalc.getDigest()));
    }
    catch (Exception e)
    {
        throw new OCSPException("problem creating ID: " + e, e);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public DigestCalculator get(final AlgorithmIdentifier algorithm)
    throws OperatorCreationException
{
    Digest dig = digestProvider.get(algorithm);

    final DigestOutputStream stream = new DigestOutputStream(dig);

    return new DigestCalculator()
    {
        public AlgorithmIdentifier getAlgorithmIdentifier()
        {
            return algorithm;
        }

        public OutputStream getOutputStream()
        {
            return stream;
        }

        public byte[] getDigest()
        {
            return stream.getDigest();
        }
    };
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public CmsAuthenticatedDataOutputStream(
    MacCalculator   macCalculator,
    DigestCalculator digestCalculator,
    ASN1ObjectIdentifier contentType,
    OutputStream dataStream,
    BERSequenceGenerator cGen,
    BERSequenceGenerator envGen,
    BERSequenceGenerator eiGen)
{
    this.macCalculator = macCalculator;
    this.digestCalculator = digestCalculator;
    this.contentType = contentType;
    this.dataStream = dataStream;
    this.cGen = cGen;
    this.envGen = envGen;
    this.eiGen = eiGen;
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
DigestCalculator getMessageImprintDigestCalculator(DigestCalculatorProvider calculatorProvider)
    throws OperatorCreationException
{
    TimeStampToken token;

    try
    {
        token = this.getTimeStampToken(timeStamps[0]);

        TimeStampTokenInfo info = token.getTimeStampInfo();
        ASN1ObjectIdentifier algOID = info.getMessageImprintAlgOID();

        DigestCalculator calc = calculatorProvider.get(new AlgorithmIdentifier(algOID));

        initialiseMessageImprintDigestCalculator(calc);

        return calc;
    }
    catch (CMSException e)
    {
        throw new OperatorCreationException("unable to extract algorithm ID: " + e.getMessage(), e);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
byte[] calculateNextHash(DigestCalculator calculator)
    throws CMSException
{
    TimeStampAndCRL tspToken = timeStamps[timeStamps.length - 1];

    OutputStream out = calculator.getOutputStream();

    try
    {
        out.write(tspToken.getEncoded(ASN1Encoding.DER));

        out.close();

        return calculator.getDigest();
    }
    catch (IOException e)
    {
        throw new CMSException("exception calculating hash: " + e.getMessage(), e);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
@Override
public DigestCalculator get(final AlgorithmIdentifier digestAlgorithmIdentifier) throws OperatorCreationException {

	ASN1ObjectIdentifier algorithmOid = digestAlgorithmIdentifier.getAlgorithm();
	final String digestBase64 = digestDocument.getDigest(DigestAlgorithm.forOID(algorithmOid.getId()));

	return new DigestCalculator() {

		@Override
		public OutputStream getOutputStream() {
			OutputStream os = new ByteArrayOutputStream();
			try {
				Utils.write(getDigest(), os);
			} catch (IOException e) {
				throw new DSSException("Unable to get outputstream", e);
			}
			return os;
		}

		@Override
		public byte[] getDigest() {
			return Utils.fromBase64(digestBase64);
		}

		@Override
		public AlgorithmIdentifier getAlgorithmIdentifier() {
			return digestAlgorithmIdentifier;
		}

	};
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
private void metadataCheck(byte[] timeStampedData)
    throws Exception
{
    CMSTimeStampedData cmsTspData = new CMSTimeStampedData(timeStampedData);
    DigestCalculatorProvider newCalculatorProvider = new BcDigestCalculatorProvider();
    DigestCalculator imprintCalculator = cmsTspData.getMessageImprintDigestCalculator(newCalculatorProvider);

    byte[] newContent = cmsTspData.getContent();
    assertEquals("Content expected and verified are different", true, Arrays.areEqual(newContent, baseData));

    imprintCalculator.getOutputStream().write(newContent);

    assertEquals(fileInput, cmsTspData.getFileName());
    assertEquals("TXT", cmsTspData.getMediaType());

    byte[] digest = imprintCalculator.getDigest();

    TimeStampToken[] tokens = cmsTspData.getTimeStampTokens();
    assertEquals("TimeStampToken expected and verified are different", 4, tokens.length);
    for (int i = 0; i < tokens.length; i++)
    {
        cmsTspData.validate(newCalculatorProvider, digest, tokens[i]);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public void testValidateAllTokens()
    throws Exception
{
    DigestCalculatorProvider digestCalculatorProvider = new BcDigestCalculatorProvider();

    DigestCalculator imprintCalculator = cmsTimeStampedData.getMessageImprintDigestCalculator(digestCalculatorProvider);

    imprintCalculator.getOutputStream().write(cmsTimeStampedData.getContent());

    byte[] digest = imprintCalculator.getDigest();

    TimeStampToken[] tokens = cmsTimeStampedData.getTimeStampTokens();
    for (int i = 0; i < tokens.length; i++)
    {
        cmsTimeStampedData.validate(digestCalculatorProvider, digest, tokens[i]);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public void testValidateAllTokens()
    throws Exception
{
    DigestCalculatorProvider digestCalculatorProvider = new BcDigestCalculatorProvider();
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();

    Streams.pipeAll(cmsTimeStampedData.getContent(), bOut);

    DigestCalculator imprintCalculator = cmsTimeStampedData.getMessageImprintDigestCalculator(digestCalculatorProvider);

    Streams.pipeAll(new ByteArrayInputStream(bOut.toByteArray()), imprintCalculator.getOutputStream());

    byte[] digest = imprintCalculator.getDigest();

    TimeStampToken[] tokens = cmsTimeStampedData.getTimeStampTokens();
    for (int i = 0; i < tokens.length; i++)
    {
        cmsTimeStampedData.validate(digestCalculatorProvider, digest, tokens[i]);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public CertificateConfirmationContent build(DigestCalculatorProvider digesterProvider)
    throws CMPException
{
    ASN1EncodableVector v = new ASN1EncodableVector();

    for (int i = 0; i != acceptedCerts.size(); i++)
    {
        X509CertificateHolder certHolder = (X509CertificateHolder)acceptedCerts.get(i);
        BigInteger reqID = (BigInteger)acceptedReqIds.get(i);

        AlgorithmIdentifier digAlg = digestAlgFinder.find(certHolder.toASN1Structure().getSignatureAlgorithm());
        if (digAlg == null)
        {
            throw new CMPException("cannot find algorithm for digest from signature");
        }

        DigestCalculator digester;

        try
        {
            digester = digesterProvider.get(digAlg);
        }
        catch (OperatorCreationException e)
        {
            throw new CMPException("unable to create digest: " + e.getMessage(), e);
        }

        CMPUtil.derEncodeToStream(certHolder.toASN1Structure(), digester.getOutputStream());

        v.add(new CertStatus(digester.getDigest(), reqID));
    }

    return new CertificateConfirmationContent(CertConfirmContent.getInstance(new DERSequence(v)), digestAlgFinder);
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
private static CertID createCertID(DigestCalculator digCalc, X509CertificateHolder issuerCert, ASN1Integer serialNumber)
    throws OCSPException
{
    try
    {
        OutputStream dgOut = digCalc.getOutputStream();

        dgOut.write(issuerCert.toASN1Structure().getSubject().getEncoded(ASN1Encoding.DER));
        dgOut.close();

        ASN1OctetString issuerNameHash = new DEROctetString(digCalc.getDigest());

        SubjectPublicKeyInfo info = issuerCert.getSubjectPublicKeyInfo();

        dgOut = digCalc.getOutputStream();

        dgOut.write(info.getPublicKeyData().getBytes());
        dgOut.close();

        ASN1OctetString issuerKeyHash = new DEROctetString(digCalc.getDigest());

        return new CertID(digCalc.getAlgorithmIdentifier(), issuerNameHash, issuerKeyHash, serialNumber);
    }
    catch (Exception e)
    {
        throw new OCSPException("problem creating ID: " + e, e);
    }
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
/**
 * construct with the responderID to be the SHA-1 keyHash of the passed in public key.
 *
 * @param key the key info of the responder public key.
 * @param digCalc  a SHA-1 digest calculator
 */
public BasicOCSPRespBuilder(
    SubjectPublicKeyInfo key,
    DigestCalculator     digCalc)
    throws OCSPException
{
    this.responderID = new RespID(key, digCalc);
}
 

import org.bouncycastle.operator.DigestCalculator; //导入依赖的package包/类
public OutputStream open(
    OutputStream    out,
    MacCalculator   macCalculator,
    DigestCalculator digestCalculator)
    throws CMSException
{
    return open(CMSObjectIdentifiers.data, out, macCalculator, digestCalculator);
}