Merge branch 'MShwed-feature/crc-8-checksum'
This commit is contained in:
n1474335
commit
2355ef9d31
@ -316,6 +316,7 @@
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"Fletcher-32 Checksum",
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"Fletcher-64 Checksum",
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"Adler-32 Checksum",
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"CRC-8 Checksum",
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"CRC-16 Checksum",
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"CRC-32 Checksum",
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"TCP/IP Checksum"
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157
src/core/operations/CRC8Checksum.mjs
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157
src/core/operations/CRC8Checksum.mjs
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@ -0,0 +1,157 @@
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/**
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* @author mshwed [m@ttshwed.com]
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* @copyright Crown Copyright 2019
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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import OperationError from "../errors/OperationError";
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import { toHexFast } from "../lib/Hex";
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/**
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* CRC-8 Checksum operation
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*/
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class CRC8Checksum extends Operation {
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/**
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* CRC8Checksum constructor
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*/
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constructor() {
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super();
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this.name = "CRC-8 Checksum";
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this.module = "Crypto";
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this.description = "A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.<br><br>The CRC was invented by W. Wesley Peterson in 1961.";
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this.infoURL = "https://wikipedia.org/wiki/Cyclic_redundancy_check";
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this.inputType = "ArrayBuffer";
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this.outputType = "string";
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this.args = [
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{
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"name": "Algorithm",
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"type": "option",
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"value": [
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"CRC-8",
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"CRC-8/CDMA2000",
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"CRC-8/DARC",
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"CRC-8/DVB-S2",
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"CRC-8/EBU",
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"CRC-8/I-CODE",
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"CRC-8/ITU",
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"CRC-8/MAXIM",
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"CRC-8/ROHC",
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"CRC-8/WCDMA"
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]
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}
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];
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}
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/**
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* Generates the pre-computed lookup table for byte division
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*
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* @param polynomial
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*/
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calculateCRC8LookupTable(polynomial) {
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const crc8Table = new Uint8Array(256);
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let currentByte;
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for (let i = 0; i < 256; i++) {
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currentByte = i;
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for (let bit = 0; bit < 8; bit++) {
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if ((currentByte & 0x80) !== 0) {
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currentByte <<= 1;
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currentByte ^= polynomial;
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} else {
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currentByte <<= 1;
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}
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}
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crc8Table[i] = currentByte;
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}
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return crc8Table;
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}
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/**
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* Calculates the CRC-8 Checksum from an input
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*
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* @param {ArrayBuffer} input
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* @param {number} polynomial
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* @param {number} initializationValue
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* @param {boolean} inputReflection
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* @param {boolean} outputReflection
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* @param {number} xorOut
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*/
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calculateCRC8(input, polynomial, initializationValue, inputReflection, outputReflection, xorOut) {
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const crcSize = 8;
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const crcTable = this.calculateCRC8LookupTable(polynomial);
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let crc = initializationValue !== 0 ? initializationValue : 0;
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let currentByte, position;
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input = new Uint8Array(input);
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for (const inputByte of input) {
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currentByte = inputReflection ? this.reverseBits(inputByte, crcSize) : inputByte;
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position = (currentByte ^ crc) & 255;
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crc = crcTable[position];
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}
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crc = outputReflection ? this.reverseBits(crc, crcSize) : crc;
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if (xorOut !== 0) crc = crc ^ xorOut;
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return toHexFast(new Uint8Array([crc]));
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}
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/**
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* Reverse the bits for a given input byte.
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*
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* @param {number} input
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*/
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reverseBits(input, hashSize) {
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let reversedByte = 0;
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for (let i = hashSize - 1; i >= 0; i--) {
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reversedByte |= ((input & 1) << i);
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input >>= 1;
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}
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return reversedByte;
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}
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/**
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* @param {ArrayBuffer} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const algorithm = args[0];
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switch (algorithm) {
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case "CRC-8":
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return this.calculateCRC8(input, 0x7, 0x0, false, false, 0x0);
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case "CRC-8/CDMA2000":
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return this.calculateCRC8(input, 0x9B, 0xFF, false, false, 0x0);
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case "CRC-8/DARC":
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return this.calculateCRC8(input, 0x39, 0x0, true, true, 0x0);
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case "CRC-8/DVB-S2":
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return this.calculateCRC8(input, 0xD5, 0x0, false, false, 0x0);
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case "CRC-8/EBU":
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return this.calculateCRC8(input, 0x1D, 0xFF, true, true, 0x0);
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case "CRC-8/I-CODE":
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return this.calculateCRC8(input, 0x1D, 0xFD, false, false, 0x0);
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case "CRC-8/ITU":
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return this.calculateCRC8(input, 0x7, 0x0, false, false, 0x55);
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case "CRC-8/MAXIM":
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return this.calculateCRC8(input, 0x31, 0x0, true, true, 0x0);
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case "CRC-8/ROHC":
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return this.calculateCRC8(input, 0x7, 0xFF, true, true, 0x0);
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case "CRC-8/WCDMA":
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return this.calculateCRC8(input, 0x9B, 0x0, true, true, 0x0);
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default:
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throw new OperationError("Unknown checksum algorithm");
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}
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}
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}
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export default CRC8Checksum;
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@ -26,6 +26,7 @@ import Fletcher16Checksum from "./Fletcher16Checksum";
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import Fletcher32Checksum from "./Fletcher32Checksum";
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import Fletcher64Checksum from "./Fletcher64Checksum";
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import Adler32Checksum from "./Adler32Checksum";
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import CRC8Checksum from "./CRC8Checksum";
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import CRC16Checksum from "./CRC16Checksum";
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import CRC32Checksum from "./CRC32Checksum";
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import BLAKE2b from "./BLAKE2b";
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@ -104,8 +105,9 @@ class GenerateAllHashes extends Operation {
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"\nFletcher-32: " + (new Fletcher32Checksum).run(byteArray, []) +
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"\nFletcher-64: " + (new Fletcher64Checksum).run(byteArray, []) +
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"\nAdler-32: " + (new Adler32Checksum).run(byteArray, []) +
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"\nCRC-16: " + (new CRC16Checksum).run(str, []) +
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"\nCRC-32: " + (new CRC32Checksum).run(str, []);
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"\nCRC-8: " + (new CRC8Checksum).run(arrayBuffer, ["CRC-8"]) +
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"\nCRC-16: " + (new CRC16Checksum).run(arrayBuffer, []) +
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"\nCRC-32: " + (new CRC32Checksum).run(arrayBuffer, []);
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return output;
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}
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@ -29,6 +29,127 @@ const ALL_BYTES = [
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].join("");
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TestRegister.addTests([
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{
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name: "CRC-8: nothing",
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input: "",
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expectedOutput: "00",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8"]
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}
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]
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},
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{
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name: "CRC-8: default check",
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input: "123456789",
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expectedOutput: "f4",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8"]
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}
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]
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},
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{
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name: "CRC-8: CDMA2000",
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input: "123456789",
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expectedOutput: "da",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/CDMA2000"]
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}
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]
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},
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{
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name: "CRC-8: DARC",
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input: "123456789",
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expectedOutput: "15",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/DARC"]
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}
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]
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},
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{
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name: "CRC-8: DVB-S2",
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input: "123456789",
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expectedOutput: "bc",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/DVB-S2"]
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}
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]
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},
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{
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name: "CRC-8: EBU",
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input: "123456789",
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expectedOutput: "97",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/EBU"]
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}
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]
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},
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{
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name: "CRC-8: I-CODE",
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input: "123456789",
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expectedOutput: "7e",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/I-CODE"]
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}
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]
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},
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{
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name: "CRC-8: ITU",
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input: "123456789",
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expectedOutput: "a1",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/ITU"]
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}
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]
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},
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{
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name: "CRC-8: MAXIM",
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input: "123456789",
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expectedOutput: "a1",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/MAXIM"]
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}
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]
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},
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{
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name: "CRC-8: ROHC",
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input: "123456789",
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expectedOutput: "d0",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/ROHC"]
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}
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]
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},
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{
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name: "CRC-8: WCDMA",
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input: "123456789",
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expectedOutput: "25",
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recipeConfig: [
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{
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"op": "CRC-8 Checksum",
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"args": ["CRC-8/WCDMA"]
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}
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]
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},
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{
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name: "CRC-16: nothing",
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input: "",
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@ -116,5 +237,5 @@ TestRegister.addTests([
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"args": []
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}
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]
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},
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}
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]);
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