Example usage for com.google.common.hash Hashing sha256

Introduction

In this page you can find the example usage for com.google.common.hash Hashing sha256.

Prototype

public static HashFunction sha256() 

Source Link

Document

Returns a hash function implementing the SHA-256 algorithm (256 hash bits) by delegating to the SHA-256 MessageDigest .

Usage

From source file:endpoint.AccountEndpoint.java

public void checkAndChangePassword(String oldPassword, String newPassword) throws AppBaseException {
    Account myAccount = findMyAccount();
    String sha256PasswordOld = Hashing.sha256().hashString(oldPassword, Charsets.UTF_8).toString();
    if (!sha256PasswordOld.equals(myAccount.getPassword()))
        throw new IllegalArgumentException("Podane haso jest nieprawidowe");
    String sha256PasswordNew = Hashing.sha256().hashString(newPassword, Charsets.UTF_8).toString();
    changePassword(myAccount, sha256PasswordNew);
}

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From source file:com.cinchapi.common.io.Files.java

/**
 * A version of the {@link #directoryChecksum(String)} method that uses
 * metadata caching for the {@code directory} to speed up checksum
 * calculations, where possible./*  w  w w. j av  a2 s.  co  m*/
 * <p>
 * Do not use this method for security operations because there are subtle
 * race conditions and possible exploits that can happen when using metadata
 * caching. However, this method is appropriate to use for validating the
 * integrity of files in non-critical situations or those where the
 * likelihood of tampering is low.
 * </p>
 * 
 * @param directory the directory whose checksum is generated
 * @return the checksum of the directory
 */
public static String directoryChecksumCached(String directory) {
    Path cache = Paths.get(USER_HOME).resolve(Paths.get(".cinchapi", "accent4j", ".checksums",
            Hashing.sha256().hashString(directory, StandardCharsets.UTF_8).toString()));
    File file = cache.toFile();
    try {
        String checksum;
        long directoryLastModified = getMostRecentFileModifiedTime(directory).toMillis();
        if (file.exists()
                && getMostRecentFileModifiedTime(cache.toString()).toMillis() > directoryLastModified) {
            checksum = Iterables.getOnlyElement(readLines(cache.toString()));
        } else {
            checksum = directoryChecksum(directory);
            Thread.sleep(1000); // avoid race condition with file
                                // modification timestamps because many file
                                // systems only have granularity within 1
                                // second.
            file.getParentFile().mkdirs();
            file.createNewFile();
            com.google.common.io.Files.asCharSink(file, StandardCharsets.UTF_8).write(checksum);
        }
        return checksum;

    } catch (IOException | InterruptedException e) {
        throw CheckedExceptions.throwAsRuntimeException(e);
    }
}

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From source file:uk.ac.horizon.artcodes.server.christmas.ImageServlet.java

@Override
public void doPut(HttpServletRequest request, HttpServletResponse response) throws IOException {
    try {/* ww w  . j  a  v a  2  s . c  om*/
        if (request.getContentLength() > image_size) {
            throw new HTTPException(HttpServletResponse.SC_REQUEST_ENTITY_TOO_LARGE, "Image too large");
        }

        verifyApp(request);
        final String id = getImageID(request);
        final GcsService gcsService = GcsServiceFactory.createGcsService(RetryParams.getDefaultInstance());
        final GcsFilename filename = new GcsFilename(request.getServerName(), id);

        final GcsFileMetadata metadata = gcsService.getMetadata(filename);
        if (metadata != null) {
            throw new HTTPException(HttpServletResponse.SC_FORBIDDEN, "Cannot modify");
        }

        final BufferedInputStream inputStream = new BufferedInputStream(request.getInputStream());
        final String mimetype = URLConnection.guessContentTypeFromStream(inputStream);
        if (mimetype == null) {
            throw new HTTPException(HttpServletResponse.SC_BAD_REQUEST, "Unrecognised image type");
        }

        final GcsFileOptions.Builder fileOptionsBuilder = new GcsFileOptions.Builder();
        fileOptionsBuilder.mimeType(mimetype);
        final GcsFileOptions fileOptions = fileOptionsBuilder.build();
        final GcsOutputChannel outputChannel = gcsService.createOrReplace(filename, fileOptions);

        final HashingOutputStream outputStream = new HashingOutputStream(Hashing.sha256(),
                Channels.newOutputStream(outputChannel));
        ByteStreams.copy(inputStream, outputStream);

        String hash = outputStream.hash().toString();
        if (!hash.equals(id)) {
            gcsService.delete(filename);
            throw new HTTPException(HttpServletResponse.SC_BAD_REQUEST, "Invalid hash");
        }

        outputStream.close();
        outputChannel.close();
    } catch (HTTPException e) {
        e.writeTo(response);
    }
}

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From source file:it.anyplace.sync.core.security.KeystoreHandler.java

public static String derDataToDeviceIdString(byte[] certificateDerData) {
    return hashDataToDeviceIdString(Hashing.sha256().hashBytes(certificateDerData).asBytes());
}

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From source file:it.anyplace.sync.core.security.KeystoreHandler.java

public static String hashDataToDeviceIdString(byte[] hashData) {
    checkArgument(hashData.length == Hashing.sha256().bits() / 8);
    String string = BaseEncoding.base32().encode(hashData).replaceAll("=+$", "");
    string = Joiner.on("")
            .join(Iterables.transform(Splitter.fixedLength(13).split(string), new Function<String, String>() {
                @Override/*from ww  w  .j a  va  2s .  c o  m*/
                public String apply(String part) {
                    return part + generateLuhn32Checksum(part);
                }
            }));
    return Joiner.on("-").join(Splitter.fixedLength(7).split(string));
}

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From source file:com.github.nethad.clustermeister.api.Credentials.java

/**
 * Get a {@link Supplier} that returns the hex-string representation of the 
 * input's SHA-256 hash.//from w ww  .ja v a2  s .c om
 * 
 * The hash is only computed once and cached for further requests.
 * 
 * @param string the input.
 * @param charset   the charset of the input.
 * @return the hexadecimal string  representation of the {@code input}s hash code.
 */
protected Supplier<String> getSha256DigestSupplier(final String string, final Charset charset) {

    return Suppliers.memoize(new Supplier<String>() {

        @Override
        public String get() {
            if (string == null || string.isEmpty()) {
                return string;
            }
            HashFunction hf = Hashing.sha256();
            HashCode hc = hf.newHasher(string.length()).putString(string, charset).hash();
            return hc.toString();
        }
    });
}

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From source file:io.prestosql.plugin.ml.ModelUtils.java

public static Model deserialize(Slice slice) {
    int version = slice.getInt(VERSION_OFFSET);
    checkArgument(version == CURRENT_FORMAT_VERSION, format("Unsupported version: %d", version));

    byte[] modelHashBytes = slice.getBytes(HASH_OFFSET, 32);
    HashCode expectedHash = HashCode.fromBytes(modelHashBytes);
    HashCode actualHash = Hashing.sha256()
            .hashBytes(slice.getBytes(ALGORITHM_OFFSET, slice.length() - ALGORITHM_OFFSET));
    checkArgument(actualHash.equals(expectedHash), "model hash does not match data");

    int id = slice.getInt(ALGORITHM_OFFSET);
    Class<? extends Model> algorithm = MODEL_SERIALIZATION_IDS.inverse().get(id);
    requireNonNull(algorithm, format("Unsupported algorith %d", id));

    int hyperparameterLength = slice.getInt(HYPERPARAMETER_LENGTH_OFFSET);

    byte[] hyperparameterBytes = slice.getBytes(HYPERPARAMETERS_OFFSET, hyperparameterLength);

    int dataLengthOffset = HYPERPARAMETERS_OFFSET + hyperparameterLength;
    long dataLength = slice.getLong(dataLengthOffset);

    int dataOffset = dataLengthOffset + SIZE_OF_LONG;
    byte[] data = slice.getBytes(dataOffset, (int) dataLength);

    try {// ww  w  .  jav a  2s .  c  om
        Method deserialize = algorithm.getMethod("deserialize", byte[].class);
        return (Model) deserialize.invoke(null, new Object[] { data });
    } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.facebook.presto.ml.ModelUtils.java

public static Model deserialize(Slice slice) {
    int version = slice.getInt(VERSION_OFFSET);
    checkArgument(version == CURRENT_FORMAT_VERSION, format("Unsupported version: %d", version));

    byte[] modelHashBytes = slice.getBytes(HASH_OFFSET, 32);
    HashCode expectedHash = HashCode.fromBytes(modelHashBytes);
    HashCode actualHash = Hashing.sha256()
            .hashBytes(slice.getBytes(ALGORITHM_OFFSET, slice.length() - ALGORITHM_OFFSET));
    checkArgument(actualHash.equals(expectedHash), "model hash does not match data");

    int id = slice.getInt(ALGORITHM_OFFSET);
    Class<? extends Model> algorithm = MODEL_SERIALIZATION_IDS.inverse().get(id);
    requireNonNull(algorithm, format("Unsupported algorith %d", id));

    int hyperparameterLength = slice.getInt(HYPERPARAMETER_LENGTH_OFFSET);

    byte[] hyperparameterBytes = slice.getBytes(HYPERPARAMETERS_OFFSET, hyperparameterLength);

    int dataLengthOffset = HYPERPARAMETERS_OFFSET + hyperparameterLength;
    long dataLength = slice.getLong(dataLengthOffset);

    int dataOffset = dataLengthOffset + SIZE_OF_LONG;
    byte[] data = slice.getBytes(dataOffset, (int) dataLength);

    try {//from  ww w  .  j a v a2s .c o  m
        Method deserialize = algorithm.getMethod("deserialize", byte[].class);
        return (Model) deserialize.invoke(null, new Object[] { data });
    } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
        throw Throwables.propagate(e);
    }
}

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From source file:org.opennms.features.topology.app.internal.support.LayoutManager.java

protected static String calculateHash(Collection<VertexRef> vertices) {
    final String vertexKey = vertices.stream()
            .sorted(Comparator.comparing(VertexRef::getNamespace).thenComparing(VertexRef::getId))
            .map(v -> String.format("%s:%s", v.getNamespace(), v.getId())).collect(Collectors.joining(","));
    return Hashing.sha256().hashString(vertexKey, Charsets.UTF_8).toString();
}

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From source file:org.onosproject.store.primitives.impl.FederatedDistributedPrimitiveCreator.java

@Override
public AsyncLeaderElector newAsyncLeaderElector(String name) {
    checkNotNull(name);/*from w ww  . ja  v  a 2 s  . com*/
    Map<PartitionId, AsyncLeaderElector> leaderElectors = Maps.transformValues(members,
            partition -> partition.newAsyncLeaderElector(name));
    Hasher<String> hasher = topic -> {
        int hashCode = Hashing.sha256().hashString(topic, Charsets.UTF_8).asInt();
        return sortedMemberPartitionIds.get(Math.abs(hashCode) % members.size());
    };
    return new PartitionedAsyncLeaderElector(name, leaderElectors, hasher);
}

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