crc16

package
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Published: May 7, 2019 License: Apache-2.0 Imports: 3 Imported by: 0

Documentation

Overview

Package crc16 is implementation according to CCITT standards.

Note by @antirez: this is actually the XMODEM CRC 16 algorithm, using the following parameters:

Name : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN" Width : 16 bit Poly : 1021 (That is actually x^16 + x^12 + x^5 + 1) Initialization : 0000 Reflect Input byte : False Reflect Output CRC : False Xor constant to output CRC : 0000 Output for "123456789" : 31C3

ported from the c++ code in the stellar-core codebase (https://github.com/stellar/stellar-core). The code is licensed as:

  • Copyright 2001-2010 Georges Menie (www.menie.org)
  • Copyright 2010-2012 Salvatore Sanfilippo (adapted to Redis coding style)
  • Copyright 2015 Stellar Development Foundation (ported to go)
  • All rights reserved. *
  • Redistribution and use in source and binary forms, with or without
  • modification, are permitted provided that the following conditions are met: *
  • * Redistributions of source code must retain the above copyright
  • notice, this list of conditions and the following disclaimer.
  • * Redistributions in binary form must reproduce the above copyright
  • notice, this list of conditions and the following disclaimer in the
  • documentation and/or other materials provided with the distribution.
  • * Neither the name of the University of California, Berkeley nor the
  • names of its contributors may be used to endorse or promote products
  • derived from this software without specific prior written permission. *
  • THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS “AS IS” AND ANY
  • EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  • WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  • DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
  • DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  • (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  • LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  • ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  • (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  • SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Index

Constants

This section is empty.

Variables

View Source
var ErrInvalidChecksum = errors.New("invalid checksum")

ErrInvalidChecksum is returned when Validate determines either the checksum or the payload has been corrupted

Functions

func Checksum

func Checksum(data []byte) []byte

Checksum returns the 2-byte checksum for the provided data

func Validate

func Validate(data []byte, expected []byte) error

Validate returns an error if the provided checksum does not match the calculated checksum of the provided data

Types

This section is empty.

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