Example usage for com.google.common.hash Hasher hash

Introduction

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

Prototype

@CheckReturnValue
HashCode hash();

Source Link

Document

Computes a hash code based on the data that have been provided to this hasher.

Usage

From source file:com.github.mgunlogson.cuckoofilter4j.SerializableSaltedHasher.java

HashCode hashObj(T object) {
    Hasher hashInst = hasher.newHasher();
    hashInst.putObject(object, funnel);
    hashInst.putLong(seedNSalt);
    return hashInst.hash();
}

From source file:com.facebook.buck.cxx.LcUuidScrubber.java

@Override
public void scrubFile(FileChannel file) throws IOException, ScrubException {
    if (!Machos.isMacho(file)) {
        return;// w w  w .  j a v  a2s  .  c o  m
    }

    long size = file.size();
    MappedByteBuffer map = file.map(FileChannel.MapMode.READ_WRITE, 0, size);

    try {
        Machos.setUuid(map, ZERO_UUID);
    } catch (Machos.MachoException e) {
        throw new ScrubException(e.getMessage());
    }
    map.rewind();

    Hasher hasher = Hashing.sha1().newHasher();
    while (map.hasRemaining()) {
        hasher.putByte(map.get());
    }

    map.rewind();
    try {
        Machos.setUuid(map, Arrays.copyOf(hasher.hash().asBytes(), 16));
    } catch (Machos.MachoException e) {
        throw new ScrubException(e.getMessage());
    }
}

From source file:org.ambraproject.service.password.PasswordDigestService.java

private byte[] produceHash(byte[] salt, String plaintextPassword) {
    byte[] passwordBytes = plaintextPassword.getBytes(BYTE_ENCODING);
    Hasher hasher = HASH_FUNCTION.newHasher(salt.length + passwordBytes.length);
    hasher.putBytes(salt);//from   ww w  .  ja v a  2s . com
    hasher.putBytes(passwordBytes);
    return hasher.hash().asBytes();
}

From source file:com.facebook.buck.cxx.toolchain.objectfile.LcUuidContentsScrubber.java

@Override
public void scrubFile(FileChannel file) throws IOException, ScrubException {
    if (!Machos.isMacho(file)) {
        return;//from  ww w.j  a va  2 s. c o  m
    }

    long size = file.size();
    MappedByteBuffer map = file.map(FileChannel.MapMode.READ_WRITE, 0, size);

    try {
        Machos.setUuidIfPresent(map, ZERO_UUID);
    } catch (Machos.MachoException e) {
        throw new ScrubException(e.getMessage());
    }
    map.rewind();

    Hasher hasher = Hashing.sha1().newHasher();
    while (map.hasRemaining()) {
        hasher.putByte(map.get());
    }

    map.rewind();
    try {
        Machos.setUuidIfPresent(map, Arrays.copyOf(hasher.hash().asBytes(), 16));
    } catch (Machos.MachoException e) {
        throw new ScrubException(e.getMessage());
    }
}

From source file:com.tfgridiron.crowdsource.cmdline.ArchiveCreator.java

public String checksumFileCollection(SpreadsheetIndexer spreadsheetIndexer,
        Set<SpreadsheetMetadata> includedMetadata) {
    Set<String> allChecksums = new TreeSet<String>();
    for (SpreadsheetMetadata m : includedMetadata) {
        allChecksums.add(m.getChecksum());
    }/*from  w w  w . ja v a 2s  . com*/
    Hasher hasher = Hashing.sha512().newHasher();
    for (String checksum : allChecksums) {
        hasher.putString(checksum);
    }
    return hasher.hash().toString();
}

From source file:org.gradle.api.internal.changedetection.state.JvmClassHasher.java

/**
 * @return null if the class should not be included in the ABI.
 *//* w w w.j a va2s .  c  om*/
@Nullable
public HashCode hashClassFile(FileDetails fileDetails) {
    HashCode signature = persistentCache.get(fileDetails.getContent().getContentMd5());
    if (signature != null) {
        return signature;
    }

    File file = new File(fileDetails.getPath());
    try {
        byte[] src = Files.toByteArray(file);
        Hasher hasher = createHasher();
        if (!hashClassBytes(hasher, src)) {
            return null;
        }
        signature = hasher.hash();
    } catch (Exception e) {
        throw new UncheckedIOException("Could not calculate the signature for class file " + file, e);
    }

    persistentCache.put(fileDetails.getContent().getContentMd5(), signature);
    return signature;
}

From source file:org.apache.servicecomb.it.edge.encrypt.filter.EdgeSignatureResponseFilter.java

@Override
public void beforeSendResponse(Invocation invocation, HttpServletResponseEx responseEx) {
    if (invocation == null) {
        return;//from w  w w.  j  ava  2s .c  o m
    }

    EncryptContext encryptContext = (EncryptContext) invocation.getHandlerContext()
            .get(EdgeConst.ENCRYPT_CONTEXT);
    if (encryptContext == null) {
        return;
    }
    Hcr hcr = encryptContext.getHcr();

    // bad practice: it's better to set signature in response header
    Buffer bodyBuffer = responseEx.getBodyBuffer();
    String body = bodyBuffer.toString();
    if (body.endsWith("}")) {
        Hasher hasher = Hashing.sha256().newHasher();
        hasher.putString(hcr.getSignatureKey(), StandardCharsets.UTF_8);
        hasher.putString(body, StandardCharsets.UTF_8);
        String signature = hasher.hash().toString();
        LOGGER.info("beforeSendResponse signature: {}", signature);

        body = body.substring(0, body.length() - 1) + ",\"signature\":\"" + signature + "\"}";
        responseEx.setBodyBuffer(Buffer.buffer(body));
    }
}

From source file:com.ibm.vicos.common.crypto.CryptoUtils.java

public String hash(final Iterable<? extends Serializable> of) {
    checkNotNull(of, "of");
    if (Iterators.size(of.iterator()) > 0) {
        Hasher hasher = getHashFunction().newHasher();
        for (Object obj : of) {
            hasher.putString(obj.toString(), Charsets.UTF_8);
        }/* w  w  w  .j  av  a2s .  c  o  m*/
        return hasher.hash().toString();
    } else {
        return NULL_HASH;
    }
}

From source file:com.github.mgunlogson.cuckoofilter4j.SerializableSaltedHasher.java

/**
 * hashes the object with an additional salt. For purpose of the cuckoo
 * filter, this is used when the hash generated for an item is all zeros.
 * All zeros is the same as an empty bucket, so obviously it's not a valid
 * tag. //  w  ww.j av  a2s .  c  o  m
 */
HashCode hashObjWithSalt(T object, int moreSalt) {
    Hasher hashInst = hasher.newHasher();
    hashInst.putObject(object, funnel);
    hashInst.putLong(seedNSalt);
    hashInst.putInt(moreSalt);
    return hashInst.hash();
}

From source file:mx.itam.metodos.lshclustering.MinhashEmitMapper.java

@Override
public void map(Text id, IntArrayWritable values, Context context) throws IOException, InterruptedException {
    for (int i = 0; i < functionsCount; i++) {
        hashValues[i] = Integer.MAX_VALUE;
    }//from w w  w  .ja va 2s.  com
    for (int i = 0; i < functionsCount; i++) {
        HashFunction hf = functions[i];
        for (Writable wr : values.get()) {
            IntWritable value = (IntWritable) wr;
            int hash = hf.hashInt(value.get()).asInt();
            if (hash < hashValues[i]) {
                hashValues[i] = hash;
            }
        }
    }
    Text sketch = new Text();
    Hasher hasher = lsh.newHasher();
    int band = 0;
    for (int i = 0; i < functionsCount; i++) {
        hasher.putInt(hashValues[i]);
        if (i > 0 && (i % rows) == 0) {
            sketch.set(band + "-" + hasher.hash().toString());
            context.write(new SecondarySortKey(sketch, id), id);
            hasher = lsh.newHasher();
            band++;
        }
    }
    sketch.set(band + "-" + hasher.hash().toString());
    context.write(new SecondarySortKey(sketch, id), id);
}