import com.google.common.util.concurrent.FluentFuture;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
-import java.math.BigInteger;
-import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
-import java.util.Base64;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
private final DataBroker dataBroker;
private final DeviceTransactionManager deviceTransactionManager;
private final OpenRoadmInterfaces openRoadmInterfaces;
- //FNV1 64 bit hash constants
- private static final BigInteger FNV_PRIME = new BigInteger("100000001b3", 16);
- private static final BigInteger FNV_INIT = new BigInteger("cbf29ce484222325", 16);
- private static final BigInteger FNV_MOD = new BigInteger("2").pow(64);
public PortMappingVersion221(DataBroker dataBroker, DeviceTransactionManager deviceTransactionManager,
OpenRoadmInterfaces openRoadmInterfaces) {
.setSupportingCircuitPackName(circuitPackName)
.setSupportingPort(port.getPortName())
.setPortDirection(port.getPortDirection().getName())
- .setLcpHashVal(fnv(nodeIdLcp));
+ .setLcpHashVal(FnvUtils.fnv1_64(nodeIdLcp));
if (port.getPortQual() != null) {
mpBldr.setPortQual(port.getPortQual().getName());
}
return nodeInfoBldr.build();
}
- /**
- * Implements the FNV-1 64bit algorithm.
- * FNV-1 128bit would be ideal for 16 bytes but we need an overhead for Base64 encoding.
- * Otherwise, the hash cannot be stored in a UTF-8 string.
- * https://www.wikiwand.com/en/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function#/FNV-1_hash
- * https://github.com/pmdamora/fnv-cracker-app/blob/master/src/main/java/passwordcrack/cracking/HashChecker.java
- * @param stringdata the String to be hashed
- * @return the hash string
- */
- private String fnv(String stringdata) {
- BigInteger hash = FNV_INIT;
- byte[] data = stringdata.getBytes(StandardCharsets.UTF_8);
-
- for (byte b : data) {
- hash = hash.multiply(FNV_PRIME).mod(FNV_MOD);
- hash = hash.xor(BigInteger.valueOf((int) b & 0xff));
- }
-
- return Base64.getEncoder().encodeToString(hash.toByteArray());
- }
}