EASY-CRC

!npm !npm  !GitHub

A pure JavaScript and zero dependencies cyclic redundancy check (CRC) node module.
It supports crc8, crc16 and crc32.

Installation

``bash
npm install --save easy-crc
`

Usage

There are three functions available respectively named crc8(), crc16() and crc32(). These functions take three arguments.
The first argument is a string with the name of the desired algorithm (below the list), and the second is the data on which you want to calculate crc. Data can be a string or a buffer.
The third parameter is the CRC seed and is optional.

`js
const { crc8, crc16, crc32 } = require('easy-crc');

// CRC8
let data = '12345';
let checksum = crc8('CRC-8', data);

console.log(checksum.toString(16));// "cb"

// CRC16
data = Buffer.from([0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39]);
checksum = crc16('CCITT-FALSE', data);

console.log(checksum.toString(16));// "7d61"

// CRC32
data = 'Hello!';
checksum = crc32('CRC-32', data);

console.log(checksum.toString(16));// "9d2acc56"
`

Available algorithms

The follow algorithm names can be passed as first argument of respective crc8(), crc16() and crc32() methods.

$3

- CRC-8
- CDMA2000
- DARC
- DVB-S2
- EBU
- I-CODE
- ITU
- MAXIM
- ROHC
- WCDMA

$3

- BUYPASS
- CCITT-FALSE
- ~~AUG-CCITT~~ not working at moment.
- ARC
- CDMA2000
- DDS-110
- DECT-R
- DECT-X
- DNP
- EN-13757
- GENIBUS
- MAXIM
- KERMIT
- MCRF4XX
- MODBUS
- RIELLO
- T10-DIF
- TELEDISK
- TMS37157
- USB
- X-25
- XMODEM
- CRC-A

$3

- CRC-32
- CRC-32C
- CRC-32D
- CRC-32Q
- BZIP2
- JAMCRC
- MPEG-2
- POSIX
- XFER

Running tests

`bash
npm test
``