Example usage for com.google.common.hash Hashing md5

Introduction

In this page you can find the example usage for com.google.common.hash Hashing md5.

Prototype

public static HashFunction md5() 

Source Link

Document

Returns a hash function implementing the MD5 hash algorithm (128 hash bits) by delegating to the MD5 MessageDigest .

Usage

From source file:org.apache.accumulo.core.file.rfile.VisMetricsGatherer.java

@Override
public void printMetrics(boolean hash, String metricWord, PrintStream out) {
    for (int i = 0; i < numLG; i++) {
        String lGName = localityGroups.get(i);
        out.print("Locality Group: ");
        if (lGName == null)
            out.println("<DEFAULT>");
        else//from w w w.  j  av a  2s .  c om
            out.println(localityGroups.get(i));
        out.printf("%-27s", metricWord);
        out.println("Number of keys" + "\t   " + "Percent of keys" + "\t" + "Number of blocks" + "\t"
                + "Percent of blocks");
        for (Entry<String, Long> entry : metric.get(lGName).asMap().entrySet()) {
            HashFunction hf = Hashing.md5();
            HashCode hc = hf.newHasher().putString(entry.getKey(), UTF_8).hash();
            if (hash)
                out.printf("%-20s", hc.toString().substring(0, 8));
            else
                out.printf("%-20s", entry.getKey());
            out.print("\t\t" + entry.getValue() + "\t\t\t");
            out.printf("%.2f", ((double) entry.getValue() / numEntries.get(i)) * 100);
            out.print("%\t\t\t");

            long blocksIn = blocks.get(lGName).get(entry.getKey());

            out.print(blocksIn + "\t\t   ");
            out.printf("%.2f", ((double) blocksIn / numBlocks.get(i)) * 100);
            out.print("%");

            out.println("");
        }
        out.println("Number of keys: " + numEntries.get(i));
        out.println();
    }
}

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From source file:com.android.ant.DexExecTask.java

private String getDexFileName(File inputFile) {
    // get the filename
    String name = inputFile.getName();
    // remove the extension
    int pos = name.lastIndexOf('.');
    if (pos != -1) {
        name = name.substring(0, pos);//from ww w.ja v a  2  s.  c o  m
    }

    // add a hash of the original file path
    HashFunction hashFunction = Hashing.md5();
    HashCode hashCode = hashFunction.hashString(inputFile.getAbsolutePath(), Charsets.UTF_16LE);

    return name + "-" + hashCode.toString() + ".jar";
}

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From source file:com.android.builder.packaging.PackagingUtils.java

/**
 * Computes an "application hash", a reasonably unique identifier for an app.
 * <p>// ww w.j  a v  a  2 s. c  o m
 * This is currently used by Instant Run to prevent apps on a device from guessing
 * the authentication token associated with an instant run developed app on the same
 * device.
 * <p>
 * This method creates the "secret", the field in the AppInfo class which is used as a simple
 * authentication token between the IDE and the app server.
 * <p>
 * This is not a cryptographically strong unique id; we could attempt to make a truly random
 * number here, but we'd need to store that id somewhere such that subsequent builds
 * will use the same secret, to avoid having the IDE and the app getting out of sync,
 * and there isn't really a natural place for us to store the key to make it survive across
 * a clean build. (One possibility is putting it into local.properties).
 * <p>
 * However, we have much simpler needs: we just need a key that can't be guessed from
 * a hostile app on the developer's device, and it only has a few guesses (after providing
 * the wrong secret to the server a few times, the server will shut down.) We can't
 * rely on the package name alone, since the port number is known, and the package name is
 * discoverable by the hostile app (by querying the contents of /data/data/*). Therefore
 * we also include facts that the hostile app can't know, such as as the path on the
 * developer's machine to the app project and the name of the developer's machine, etc.
 * The goal is for this secret to be reasonably stable (e.g. the same from build to build)
 * yet not something an app could guess if it only has a couple of tries.
 */
public static long computeApplicationHash(@NonNull File projectDir) {
    HashFunction hashFunction = Hashing.md5();
    Hasher hasher = hashFunction.newHasher();
    try {
        projectDir = projectDir.getCanonicalFile();
    } catch (IOException ignore) {
        // If this throws an exception the assignment won't
        // be done and we'll stick with the regular project dir
    }
    String path = projectDir.getPath();
    hasher.putBytes(path.getBytes(Charsets.UTF_8));
    String user = System.getProperty("user.name");
    if (user != null) {
        hasher.putBytes(user.getBytes(Charsets.UTF_8));
    }
    return hasher.hash().asLong();
}

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From source file:org.opendaylight.openflowplugin.applications.topology.lldp.utils.LLDPDiscoveryUtils.java

/**
 * @param nodeConnectorId//w  ww.j  av a 2 s . c o m
 * @return extra authenticator for lldp security
 * @throws NoSuchAlgorithmException
 */
public static byte[] getValueForLLDPPacketIntegrityEnsuring(final NodeConnectorId nodeConnectorId)
        throws NoSuchAlgorithmException {
    String finalKey;
    if (LLDPActivator.getLldpSecureKey() != null && !LLDPActivator.getLldpSecureKey().isEmpty()) {
        finalKey = LLDPActivator.getLldpSecureKey();
    } else {
        finalKey = ManagementFactory.getRuntimeMXBean().getName();
    }
    final String pureValue = nodeConnectorId + finalKey;

    final byte[] pureBytes = pureValue.getBytes();
    HashFunction hashFunction = Hashing.md5();
    Hasher hasher = hashFunction.newHasher();
    HashCode hashedValue = hasher.putBytes(pureBytes).hash();
    return hashedValue.asBytes();
}

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From source file:org.openqa.selenium.BuckBuild.java

private void downloadBuckPexIfNecessary(ImmutableList.Builder<String> builder) throws IOException {
    Path projectRoot = InProject.locate("Rakefile").getParentFile().toPath();
    String buckVersion = new String(Files.readAllBytes(projectRoot.resolve(".buckversion"))).trim();

    Path pex = projectRoot.resolve("buck-out/crazy-fun/" + buckVersion + "/buck.pex");

    String expectedHash = new String(Files.readAllBytes(projectRoot.resolve(".buckhash"))).trim();
    HashCode md5 = Files.exists(pex) ? Hashing.md5().hashBytes(Files.readAllBytes(pex))
            : HashCode.fromString("aa"); // So we have a non-null value

    if (!Files.exists(pex) || !expectedHash.equals(md5.toString())) {
        log.warning("Downloading PEX");

        if (!Files.exists(pex.getParent())) {
            Files.createDirectories(pex.getParent());
        }/*from  www.jav a  2 s  .  c  o m*/

        URL url = new URL(String.format(
                "https://github.com/SeleniumHQ/buck/releases/download/buck-release-%s/buck.pex", buckVersion));
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setInstanceFollowRedirects(true);
        Files.copy(connection.getInputStream(), pex, REPLACE_EXISTING);
        // Do our best to make this executable
        pex.toFile().setExecutable(true);
    }

    md5 = Hashing.md5().hashBytes(Files.readAllBytes(pex));
    if (!expectedHash.equals(md5.toString())) {
        throw new WebDriverException("Unable to confirm that download is valid");
    }

    if (Platform.getCurrent().is(WINDOWS)) {
        String python = CommandLine.find("python2");
        if (python == null) {
            python = CommandLine.find("python");
        }
        Preconditions.checkNotNull(python, "Unable to find python executable");
        builder.add(python);
    }

    builder.add(pex.toAbsolutePath().toString());
}

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From source file:com.google.gcloud.storage.StorageImpl.java

@Override
public Blob create(BlobInfo blobInfo, byte[] content, BlobTargetOption... options) {
    content = firstNonNull(content, EMPTY_BYTE_ARRAY);
    BlobInfo updatedInfo = blobInfo.toBuilder()
            .md5(BaseEncoding.base64().encode(Hashing.md5().hashBytes(content).asBytes()))
            .crc32c(BaseEncoding.base64().encode(Ints.toByteArray(Hashing.crc32c().hashBytes(content).asInt())))
            .build();//from ww  w  . j ava  2  s  . c o  m
    return create(updatedInfo, new ByteArrayInputStream(content), options);
}

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From source file:com.bennavetta.appsite2.sync.Rsync.java

/**
 * Search for a match in a list of blocks.
 * @param blocks the blocks to search in
 * @param checksum the weak rolling checksum to search
 * @param data the data being searched for (in case a hash needs to be generated)
 * @return the index of the matching block, or {@code -1}
 *///ww w . j ava 2 s  .c o m
private static int findMatch(final ObjectArrayList<Block> blocks, final long checksum, final byte[] data) {
    //CHECKSTYLE.OFF: VisibilityModifier - using getters for the anonymous class is kind of pointless
    // use a predicate so we can stop iterating once a match is found
    return blocks.forEach(new ObjectPredicate<Block>() {
        int match = -1;
        int index;
        byte[] dataHash;

        @Override
        public boolean apply(final Block value) {
            if (value.getChecksum() == checksum) {
                // calculate the hash of the input data lazily
                if (dataHash == null) {
                    dataHash = Hashing.md5().hashBytes(data).asBytes();
                }
                if (Arrays.equals(dataHash, value.getHash())) {
                    match = index;
                    return false;
                }
            }
            index++;
            return true;
        }
    }).match;
    //CHECKSTYLE.ON: VisibilityModifier
}

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From source file:storage.ConfigSaver.java

/**
 * Calculates a MD5 hash String for a ModuleConfiguration.
 * /*w  ww.j  a  v a  2s . co  m*/
 * @param config
 * @return MD5 hash String
 */
public static String hash(ModuleConfiguration config) {
    try {
        if (config != null) {
            ByteArrayOutputStream byteArray = new ByteArrayOutputStream(1200);
            initMapper().writeValue(byteArray, config);
            HashFunction hashFunction = Hashing.md5();
            HashCode hashCode = hashFunction.newHasher().putBytes(byteArray.toByteArray()).hash();
            return hashCode.toString();
        }
    } catch (IOException e) {
        EXCEPTION_LOGGER.log(Level.SEVERE, "Exception at hash()", e);
    }
    return "";
}

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From source file:org.jclouds.digitalocean2.ssh.ECDSAKeys.java

/**
 * Create a fingerprint per the following <a href="http://tools.ietf.org/html/draft-friedl-secsh-fingerprint-00"
 * >spec</a>/*from   www  .  java 2  s  .c o m*/
 * 
 * @return hex fingerprint ex. {@code 2b:a9:62:95:5b:8b:1d:61:e0:92:f7:03:10:e9:db:d9}
 */
public static String fingerprint(ECPublicKey publicKey) {
    byte[] keyBlob = keyBlob(publicKey);
    return hexColonDelimited(Hashing.md5().hashBytes(keyBlob));
}

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From source file:brooklyn.entity.container.DockerUtils.java

public static String imageName(Entity entity, String dockerfile) {
    String simpleName = entity.getEntityType().getSimpleName();
    String version = entity.config().get(SoftwareProcess.SUGGESTED_VERSION);

    String label = Joiner.on(":").skipNulls().join(simpleName, version, dockerfile);
    return Identifiers.makeIdFromHash(Hashing.md5().hashString(label, Charsets.UTF_8).asLong())
            .toLowerCase(Locale.ENGLISH);
}

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