Example usage for java.security DigestOutputStream DigestOutputStream

Introduction

In this page you can find the example usage for java.security DigestOutputStream DigestOutputStream.

Prototype

public DigestOutputStream(OutputStream stream, MessageDigest digest) 

Source Link

Document

Creates a digest output stream, using the specified output stream and message digest.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    System.out.println("input     : " + new String(input));
    MessageDigest hash = MessageDigest.getInstance("SHA1");

    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(input);
    DigestInputStream digestInputStream = new DigestInputStream(byteArrayInputStream, hash);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    int ch;//www .j a  v a 2 s  . c o m
    while ((ch = digestInputStream.read()) >= 0) {
        byteArrayOutputStream.write(ch);
    }

    byte[] newInput = byteArrayOutputStream.toByteArray();
    System.out.println("in digest : " + new String(digestInputStream.getMessageDigest().digest()));

    byteArrayOutputStream = new ByteArrayOutputStream();
    DigestOutputStream digestOutputStream = new DigestOutputStream(byteArrayOutputStream, hash);
    digestOutputStream.write(newInput);
    digestOutputStream.close();

    System.out.println("out digest: " + new String(digestOutputStream.getMessageDigest().digest()));
}

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From source file:MainClass.java

static void performOutputTest() throws Exception {
    MessageDigest md = MessageDigest.getInstance("SHA");
    FileOutputStream fout = new FileOutputStream("sha-results.txt");
    DigestOutputStream out = new DigestOutputStream(fout, md);
    byte[] b = "testCase".getBytes();
    out.write(b, 0, b.length);/*ww  w  .  j a v  a2 s  .  c o m*/
    md = out.getMessageDigest();
    String s = new String(md.digest());
    System.out.println("Calculated result: " + s);
}

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From source file:com.netflix.zeno.hash.HashOrderDependent.java

public HashOrderDependent() {
    try {/*  w  w  w  .  ja v  a2s. c o m*/
        digest = MessageDigest.getInstance("MD5");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
    digestOutputStream = new DigestOutputStream(NullOutputStream.NULL_OUTPUT_STREAM, digest);
    dataOutputStream = new DataOutputStream(digestOutputStream);
}

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From source file:com.thoughtworks.go.server.dashboard.GoDashboardPipelineGroup.java

public String etag() {
    try {/*from   w  w  w  .j a v  a2  s. com*/
        MessageDigest digest = DigestUtils.getSha256Digest();
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(
                new DigestOutputStream(new NullOutputStream(), digest));
        outputStreamWriter.write(name);
        outputStreamWriter.write("/");
        outputStreamWriter.write(Integer.toString(permissions.hashCode()));
        outputStreamWriter.write("[");

        for (Map.Entry<String, GoDashboardPipeline> entry : pipelines.entrySet()) {
            long lastUpdatedTimeStamp = entry.getValue().getLastUpdatedTimeStamp();
            outputStreamWriter.write(entry.getKey());
            outputStreamWriter.write(":");
            outputStreamWriter.write(Long.toString(lastUpdatedTimeStamp));
        }

        outputStreamWriter.write("]");
        outputStreamWriter.flush();

        return Hex.encodeHexString(digest.digest());
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

---

From source file:MethodHashing.java

public static long methodHash(Method method) throws Exception {
    Class[] parameterTypes = method.getParameterTypes();
    String methodDesc = method.getName() + "(";
    for (int j = 0; j < parameterTypes.length; j++) {
        methodDesc += getTypeString(parameterTypes[j]);
    }//from  w  w w .  j a va 2s . co m
    methodDesc += ")" + getTypeString(method.getReturnType());

    long hash = 0;
    ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream(512);
    MessageDigest messagedigest = MessageDigest.getInstance("SHA");
    DataOutputStream dataoutputstream = new DataOutputStream(
            new DigestOutputStream(bytearrayoutputstream, messagedigest));
    dataoutputstream.writeUTF(methodDesc);
    dataoutputstream.flush();
    byte abyte0[] = messagedigest.digest();
    for (int j = 0; j < Math.min(8, abyte0.length); j++)
        hash += (long) (abyte0[j] & 0xff) << j * 8;
    return hash;
}

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From source file:eu.peppol.document.AsicFilterInputStreamTest.java

/**
 * Takes a file holding an SBD/SBDH with an ASiC archive in base64 as payload and extracts the ASiC archive in binary format, while
 * calculating the message digest.//  ww  w . j  a  va  2 s  . c  om
 *
 * @throws Exception
 */
@Test
public void parseSampleSbdWithAsic() throws Exception {
    InputStream resourceAsStream = AsicFilterInputStreamTest.class.getClassLoader()
            .getResourceAsStream("sample-sbd-with-asic.xml");

    AsicFilterInputStream asicFilterInputStream = new AsicFilterInputStream(resourceAsStream);

    Path asicFile = Files.createTempFile("unit-test", ".asice");
    OutputStream asicOutputStream = Files.newOutputStream(asicFile);
    MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");

    DigestOutputStream digestOutputStream = new DigestOutputStream(asicOutputStream, messageDigest);
    Base64OutputStream base64OutputStream = new Base64OutputStream(digestOutputStream, false);

    IOUtils.copy(asicFilterInputStream, base64OutputStream);
    log.debug("Wrote ASiC to:" + asicFile);
    log.debug("Digest: " + new String(Base64.getEncoder().encode(messageDigest.digest())));

}

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From source file:com.adaptris.core.services.metadata.PayloadHashingService.java

public void doService(AdaptrisMessage msg) throws ServiceException {
    InputStream in = null;// w w  w .ja  v  a2 s.c  o m
    OutputStream out = null;
    try {
        in = msg.getInputStream();
        MessageDigest digest = MessageDigest.getInstance(getHashAlgorithm());
        out = new DigestOutputStream(new DevNullOutputStream(), digest);
        IOUtils.copy(in, out);
        out.flush();
        byte[] hash = digest.digest();
        msg.addMetadata(getMetadataKey(), new Base64ByteTranslator().translate(hash));
    } catch (Exception e) {
        throw new ServiceException(e);
    } finally {
        IOUtils.closeQuietly(in);
        IOUtils.closeQuietly(out);
    }
}

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From source file:com.thoughtworks.go.server.dashboard.AbstractDashboardGroup.java

protected String digest(String permissionsSegment) {
    try {//from  ww  w.j  a va 2  s  .  c  o m
        MessageDigest digest = DigestUtils.getSha256Digest();
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(
                new DigestOutputStream(new NullOutputStream(), digest));
        outputStreamWriter.write(getClass().getSimpleName());
        outputStreamWriter.write("$");
        outputStreamWriter.write(name());
        outputStreamWriter.write("/");
        outputStreamWriter.write(permissionsSegment);
        outputStreamWriter.write("[");

        for (GoDashboardPipeline pipeline : allPipelines()) {
            outputStreamWriter.write(pipeline.cacheSegment());
            outputStreamWriter.write(",");
        }

        outputStreamWriter.write("]");
        outputStreamWriter.flush();

        return Hex.encodeHexString(digest.digest());
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

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From source file:eu.peppol.document.PayloadParserTest.java

/**
 * Takes a file holding an SBD/SBDH with an ASiC archive in base64 as payload and extracts the ASiC archive in binary format, while
 * calculating the message digest.// w w  w  .j a v a2  s  . c  om
 *
 * @throws Exception
 */
@Test
public void parseSampleSbdWithAsic() throws Exception {

    InputStream resourceAsStream = PayloadParserTest.class.getClassLoader()
            .getResourceAsStream("sample-sbd-with-asic.xml");
    assertNotNull(resourceAsStream);

    Path xmlFile = Files.createTempFile("unit-test", ".xml");

    XMLEventReader xmlEventReader = XMLInputFactory.newInstance().createXMLEventReader(resourceAsStream,
            "UTF-8");
    FileOutputStream outputStream = new FileOutputStream(xmlFile.toFile());
    XMLEventWriter xmlEventWriter = XMLOutputFactory.newInstance().createXMLEventWriter(outputStream, "UTF-8");

    Path asicFile = Files.createTempFile("unit-test", ".asice");
    OutputStream asicOutputStream = Files.newOutputStream(asicFile);
    MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");

    DigestOutputStream digestOutputStream = new DigestOutputStream(asicOutputStream, messageDigest);
    Base64OutputStream base64OutputStream = new Base64OutputStream(digestOutputStream, false);

    boolean insideAsicElement = false;

    while (xmlEventReader.hasNext()) {
        XMLEvent xmlEvent = xmlEventReader.nextEvent();

        switch (xmlEvent.getEventType()) {
        case XMLEvent.START_ELEMENT:
            String localPart = xmlEvent.asStartElement().getName().getLocalPart();
            if ("asic".equals(localPart)) {
                insideAsicElement = true;
            }
            break;
        case XMLEvent.END_ELEMENT:
            localPart = xmlEvent.asEndElement().getName().getLocalPart();
            if ("asic".equals(localPart)) {
                insideAsicElement = false;
            }
            break;

        case XMLEvent.CHARACTERS:
            // Whenever we are inside the ASiC XML element, spit
            // out the base64 encoded data into the base64 decoding output stream.
            if (insideAsicElement) {
                Characters characters = xmlEvent.asCharacters();
                base64OutputStream.write(characters.getData().getBytes("UTF-8"));
            }
            break;
        }
        xmlEventWriter.add(xmlEvent);
    }

    asicOutputStream.close();
    outputStream.close();
    log.debug("Wrote xml output to: " + xmlFile);
    log.debug("Wrote ASiC to:" + asicFile);
    log.debug("Digest: " + new String(Base64.getEncoder().encode(messageDigest.digest())));
}

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From source file:MethodHashing.java

public static long constructorHash(Constructor method) throws Exception {
    Class[] parameterTypes = method.getParameterTypes();
    String methodDesc = method.getName() + "(";
    for (int j = 0; j < parameterTypes.length; j++) {
        methodDesc += getTypeString(parameterTypes[j]);
    }//  w ww.j a  v a  2  s. c o m
    methodDesc += ")";

    long hash = 0;
    ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream(512);
    MessageDigest messagedigest = MessageDigest.getInstance("SHA");
    DataOutputStream dataoutputstream = new DataOutputStream(
            new DigestOutputStream(bytearrayoutputstream, messagedigest));
    dataoutputstream.writeUTF(methodDesc);
    dataoutputstream.flush();
    byte abyte0[] = messagedigest.digest();
    for (int j = 0; j < Math.min(8, abyte0.length); j++)
        hash += (long) (abyte0[j] & 0xff) << j * 8;
    return hash;
}

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