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Converted the core to ES modules

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n1474335 2018-03-26 23:14:23 +01:00
parent c1bb93eec1
commit 9b4fc3d3aa
154 changed files with 1901 additions and 2223 deletions
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179
src/core/operations/Checksum.js
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@ -1,179 +0,0 @@
import * as CRC from "js-crc";
import Utils from "../Utils.js";
/**
* Checksum operations.
*
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*
* @namespace
*/
const Checksum = {
/**
* Fletcher-8 Checksum operation.
*
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*/
runFletcher8: function(input, args) {
let a = 0,
b = 0;
for (let i = 0; i < input.length; i++) {
a = (a + input[i]) % 0xf;
b = (b + a) % 0xf;
}
return Utils.hex(((b << 4) | a) >>> 0, 2);
},
/**
* Fletcher-16 Checksum operation.
*
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*/
runFletcher16: function(input, args) {
let a = 0,
b = 0;
for (let i = 0; i < input.length; i++) {
a = (a + input[i]) % 0xff;
b = (b + a) % 0xff;
}
return Utils.hex(((b << 8) | a) >>> 0, 4);
},
/**
* Fletcher-32 Checksum operation.
*
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*/
runFletcher32: function(input, args) {
let a = 0,
b = 0;
for (let i = 0; i < input.length; i++) {
a = (a + input[i]) % 0xffff;
b = (b + a) % 0xffff;
}
return Utils.hex(((b << 16) | a) >>> 0, 8);
},
/**
* Fletcher-64 Checksum operation.
*
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*/
runFletcher64: function(input, args) {
let a = 0,
b = 0;
for (let i = 0; i < input.length; i++) {
a = (a + input[i]) % 0xffffffff;
b = (b + a) % 0xffffffff;
}
return Utils.hex(b >>> 0, 8) + Utils.hex(a >>> 0, 8);
},
/**
* Adler-32 Checksum operation.
*
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*/
runAdler32: function(input, args) {
let MOD_ADLER = 65521,
a = 1,
b = 0;
for (let i = 0; i < input.length; i++) {
a += input[i];
b += a;
}
a %= MOD_ADLER;
b %= MOD_ADLER;
return Utils.hex(((b << 16) | a) >>> 0, 8);
},
/**
* CRC-32 Checksum operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
runCRC32: function(input, args) {
return CRC.crc32(input);
},
/**
* CRC-16 Checksum operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
runCRC16: function(input, args) {
return CRC.crc16(input);
},
/**
* TCP/IP Checksum operation.
*
* @author GCHQ Contributor [1]
* @param {byteArray} input
* @param {Object[]} args
* @returns {string}
*
* @example
* // returns '3f2c'
* Checksum.runTcpIp([0x45,0x00,0x00,0x87,0xa3,0x1b,0x40,0x00,0x40,0x06,
* 0x00,0x00,0xac,0x11,0x00,0x04,0xac,0x11,0x00,0x03])
*
* // returns 'a249'
* Checksum.runTcpIp([0x45,0x00,0x01,0x11,0x3f,0x74,0x40,0x00,0x40,0x06,
* 0x00,0x00,0xac,0x11,0x00,0x03,0xac,0x11,0x00,0x04])
*/
runTCPIP: function(input, args) {
let csum = 0;
for (let i = 0; i < input.length; i++) {
if (i % 2 === 0) {
csum += (input[i] << 8);
} else {
csum += input[i];
}
}
csum = (csum >> 16) + (csum & 0xffff);
return Utils.hex(0xffff - csum);
},
};
export default Checksum;