Examples with Hash com.swirlds.common.crypto.Hash used on opensource projects

Example 6 with Hash

use of com.swirlds.common.crypto.Hash in project hedera-services by hashgraph.

the class MerkleDiskFs method setHashFromContents.

private void setHashFromContents() {
    throwIfImmutable("Cannot change this file's content hash if it's immutable.");
    var baos = new ByteArrayOutputStream();
    try (SerializableDataOutputStream out = new SerializableDataOutputStream(baos)) {
        serializeFidInfo(out, fileHashes::get);
    } catch (IOException improbable) {
        throw new IllegalStateException(improbable);
    }
    try {
        baos.close();
        baos.flush();
    } catch (IOException improbable) {
        throw new IllegalStateException(improbable);
    }
    super.setHash(new Hash(noThrowSha384HashOf(baos.toByteArray())));
}

Example 7 with Hash

use of com.swirlds.common.crypto.Hash in project hedera-services by hashgraph.

the class MerkleSpecialFiles method getHash.

@Override
public Hash getHash() {
    final var baos = baosSupplier.get();
    for (final var entry : fileContents.entrySet()) {
        try {
            baos.write(Longs.toByteArray(entry.getKey().getFileNum()));
            baos.write(entry.getValue().getHash().getValue());
        } catch (IOException e) {
            log.error("Hash concatenation failed", e);
            throw new UncheckedIOException(e);
        }
    }
    return new Hash(noThrowSha384HashOf(baos.toByteArray()), DigestType.SHA_384);
}

Example 8 with Hash

use of com.swirlds.common.crypto.Hash in project hedera-services by hashgraph.

the class VirtualDataSourceNewAPIBench method w3_add10kLeafValues.

/**
 * Updates the first 10k leaves with new random values
 */
@Benchmark
public void w3_add10kLeafValues() throws Exception {
    dataSource.saveRecords(numEntities, numEntities * 2, Stream.empty(), LongStream.range(nextPath, nextPath + 10_000).mapToObj(i -> new VirtualLeafRecord<>(i + numEntities, hash((int) i), new ContractKey(i, i), new ContractValue(i))), Stream.empty());
    nextPath += 10_000;
}

Example 9 with Hash

use of com.swirlds.common.crypto.Hash in project hedera-services by hashgraph.

the class VirtualDataSourceNewAPIBench method setup.

@Setup(Level.Trial)
public void setup() {
    System.out.println("------- Setup -----------------------------");
    storePath = Path.of("store-" + impl);
    try {
        final boolean storeExists = Files.exists(storePath);
        // get slot index suppliers
        switch(impl) {
            case "lmdb":
                dataSource = new VFCDataSourceLmdb<>(// max seralized size
                1 + 8 + 32, // max seralized size
                ContractKey::new, ContractValue.SERIALIZED_SIZE, ContractValue::new, storePath);
                break;
            // storePath);
            case "jasperdb":
                VirtualLeafRecordSerializer<ContractKey, ContractValue> virtualLeafRecordSerializer = new VirtualLeafRecordSerializer<>((short) 1, DigestType.SHA_384, (short) 1, DataFileCommon.VARIABLE_DATA_SIZE, new ContractKeySupplier(), (short) 1, ContractValue.SERIALIZED_SIZE, new ContractValueSupplier(), true);
                JasperDbBuilder<ContractKey, ContractValue> dbBuilder = new JasperDbBuilder<>();
                dbBuilder.virtualLeafRecordSerializer(virtualLeafRecordSerializer).virtualInternalRecordSerializer(new VirtualInternalRecordSerializer()).keySerializer(new ContractKeySerializer()).storageDir(storePath).maxNumOfKeys(numEntities + 10_000_000).preferDiskBasedIndexes(false).internalHashesRamToDiskThreshold(Long.MAX_VALUE).mergingEnabled(true);
                dataSource = dbBuilder.build("jdb", "4ApiBench");
                break;
            default:
                throw new IllegalStateException("Unexpected value: " + impl);
        }
        ;
        // create data
        if (!storeExists) {
            System.out.println("================================================================================");
            System.out.println("Creating data ...");
            // create internal nodes and leaves
            long iHaveWritten = 0;
            while (iHaveWritten < numEntities) {
                final long start = System.currentTimeMillis();
                final long batchSize = Math.min(WRITE_BATCH_SIZE, numEntities - iHaveWritten);
                dataSource.saveRecords(numEntities, numEntities * 2, LongStream.range(iHaveWritten, iHaveWritten + batchSize).mapToObj(i -> new VirtualInternalRecord(i, hash((int) i))), LongStream.range(iHaveWritten, iHaveWritten + batchSize).mapToObj(i -> new VirtualLeafRecord<>(i + numEntities, hash((int) i), new ContractKey(i, i), new ContractValue(i))), Stream.empty());
                iHaveWritten += batchSize;
                printUpdate(start, batchSize, ContractValue.SERIALIZED_SIZE, "Created " + iHaveWritten + " Nodes");
            }
            System.out.println("================================================================================");
            // set nextPath
            nextPath = numEntities;
            // let merge catch up
            try {
                System.out.println("Waiting for merge");
                Thread.sleep(30000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("Loaded existing data");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Example 10 with Hash

use of com.swirlds.common.crypto.Hash in project hedera-services by hashgraph.

the class VFCDataSourceLmdb method loadLeafRecord.

// ==================================================================================================================
// Private methods
/**
 * load a leaf record by path, using the provided key or if null deserializing the key.
 */
private VirtualLeafRecord<K, V> loadLeafRecord(Txn<ByteBuffer> txn, long path, K key) throws IOException {
    ByteBuffer keyHashValueBuffer = leafPathToKeyHashValueMap.get(txn, getPathNativeOrderBytes(path));
    if (keyHashValueBuffer == null) {
        return null;
    }
    // deserialize
    keyHashValueBuffer.clear();
    // deserialize key
    if (key != null) {
        // jump past the key because we don't need to deserialize it
        keyHashValueBuffer.position(keySizeBytes);
    } else {
        final int keySerializationVersion = keyHashValueBuffer.getInt();
        key = keyConstructor.get();
        key.deserialize(keyHashValueBuffer, keySerializationVersion);
    }
    // deserialize hash
    final Hash hash = new Hash(DigestType.SHA_384);
    keyHashValueBuffer.get(hash.getValue());
    // deserialize value
    final int valueSerializationVersion = keyHashValueBuffer.getInt();
    final V value = valueConstructor.get();
    value.deserialize(keyHashValueBuffer, valueSerializationVersion);
    // return new VirtualLeafRecord
    return new VirtualLeafRecord<>(path, hash, key, value);
}