com.uber.tchannel.checksum.Checksums Maven / Gradle / Ivy
/*
* Copyright (c) 2015 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.uber.tchannel.checksum;
import com.uber.tchannel.frames.CallFrame;
import io.netty.buffer.ByteBuf;
import java.util.zip.Adler32;
public final class Checksums {
public static boolean verifyChecksum(CallFrame msg) {
return (calculateChecksum(msg) == msg.getChecksum());
}
public static boolean verifyExistingChecksum(CallFrame msg, long checksum) {
return (msg.getChecksum() == checksum);
}
public static long calculateChecksum(CallFrame msg) {
return calculateChecksum(msg, 0L);
}
public static long calculateChecksum(CallFrame msg, long digestSeed) {
// TODO: this is bad
ByteBuf payloadCopy = msg.getPayload().slice();
byte[] payloadBytes = new byte[msg.getPayloadSize()];
payloadCopy.readBytes(payloadBytes);
switch (msg.getChecksumType()) {
case Adler32:
Adler32 f = new Adler32();
f.update((int) digestSeed);
f.update(payloadBytes);
return f.getValue();
case FarmhashFingerPrint32:
case NoChecksum:
case CRC32C:
default:
return 0;
}
}
}