cyberchef
Version:
The Cyber Swiss Army Knife for encryption, encoding, compression and data analysis.
176 lines (166 loc) • 6.02 kB
JavaScript
/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import {fromBase64, ALPHABET_OPTIONS} from "../lib/Base64.mjs";
/**
* From Base64 operation
*/
class FromBase64 extends Operation {
/**
* FromBase64 constructor
*/
constructor() {
super();
this.name = "From Base64";
this.module = "Default";
this.description = "Base64 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.<br><br>This operation decodes data from an ASCII Base64 string back into its raw format.<br><br>e.g. <code>aGVsbG8=</code> becomes <code>hello</code>";
this.infoURL = "https://wikipedia.org/wiki/Base64";
this.inputType = "string";
this.outputType = "byteArray";
this.args = [
{
name: "Alphabet",
type: "editableOption",
value: ALPHABET_OPTIONS
},
{
name: "Remove non-alphabet chars",
type: "boolean",
value: true
},
{
name: "Strict mode",
type: "boolean",
value: false
}
];
this.checks = [
{
pattern: "^\\s*(?:[A-Z\\d+/]{4})+(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?\\s*$",
flags: "i",
args: ["A-Za-z0-9+/=", true, false]
},
{
pattern: "^\\s*[A-Z\\d\\-_]{20,}\\s*$",
flags: "i",
args: ["A-Za-z0-9-_", true, false]
},
{
pattern: "^\\s*(?:[A-Z\\d+\\-]{4}){5,}(?:[A-Z\\d+\\-]{2}==|[A-Z\\d+\\-]{3}=)?\\s*$",
flags: "i",
args: ["A-Za-z0-9+\\-=", true, false]
},
{
pattern: "^\\s*(?:[A-Z\\d./]{4}){5,}(?:[A-Z\\d./]{2}==|[A-Z\\d./]{3}=)?\\s*$",
flags: "i",
args: ["./0-9A-Za-z=", true, false]
},
{
pattern: "^\\s*[A-Z\\d_.]{20,}\\s*$",
flags: "i",
args: ["A-Za-z0-9_.", true, false]
},
{
pattern: "^\\s*(?:[A-Z\\d._]{4}){5,}(?:[A-Z\\d._]{2}--|[A-Z\\d._]{3}-)?\\s*$",
flags: "i",
args: ["A-Za-z0-9._-", true, false]
},
{
pattern: "^\\s*(?:[A-Z\\d+/]{4}){5,}(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?\\s*$",
flags: "i",
args: ["0-9a-zA-Z+/=", true, false]
},
{
pattern: "^\\s*(?:[A-Z\\d+/]{4}){5,}(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?\\s*$",
flags: "i",
args: ["0-9A-Za-z+/=", true, false]
},
{
pattern: "^[ !\"#$%&'()*+,\\-./\\d:;<=>?@A-Z[\\\\\\]^_]{20,}$",
flags: "",
args: [" -_", false, false]
},
{
pattern: "^\\s*[A-Z\\d+\\-]{20,}\\s*$",
flags: "i",
args: ["+\\-0-9A-Za-z", true, false]
},
{
pattern: "^\\s*[!\"#$%&'()*+,\\-0-689@A-NP-VX-Z[`a-fh-mp-r]{20,}\\s*$",
flags: "",
args: ["!-,-0-689@A-NP-VX-Z[`a-fh-mp-r", true, false]
},
{
pattern: "^\\s*(?:[N-ZA-M\\d+/]{4}){5,}(?:[N-ZA-M\\d+/]{2}==|[N-ZA-M\\d+/]{3}=)?\\s*$",
flags: "i",
args: ["N-ZA-Mn-za-m0-9+/=", true, false]
},
{
pattern: "^\\s*[A-Z\\d./]{20,}\\s*$",
flags: "i",
args: ["./0-9A-Za-z", true, false]
},
{
pattern: "^\\s*(?:[A-Z=\\d\\+/]{4}){5,}(?:[A-Z=\\d\\+/]{2}CC|[A-Z=\\d\\+/]{3}C)?\\s*$",
flags: "i",
args: ["/128GhIoPQROSTeUbADfgHijKLM+n0pFWXY456xyzB7=39VaqrstJklmNuZvwcdEC", true, false]
},
{
pattern: "^\\s*(?:[A-Z=\\d\\+/]{4}){5,}(?:[A-Z=\\d\\+/]{2}55|[A-Z=\\d\\+/]{3}5)?\\s*$",
flags: "i",
args: ["3GHIJKLMNOPQRSTUb=cdefghijklmnopWXYZ/12+406789VaqrstuvwxyzABCDEF5", true, false]
},
{
pattern: "^\\s*(?:[A-Z=\\d\\+/]{4}){5,}(?:[A-Z=\\d\\+/]{2}22|[A-Z=\\d\\+/]{3}2)?\\s*$",
flags: "i",
args: ["ZKj9n+yf0wDVX1s/5YbdxSo=ILaUpPBCHg8uvNO4klm6iJGhQ7eFrWczAMEq3RTt2", true, false]
},
{
pattern: "^\\s*(?:[A-Z=\\d\\+/]{4}){5,}(?:[A-Z=\\d\\+/]{2}55|[A-Z=\\d\\+/]{3}5)?\\s*$",
flags: "i",
args: ["HNO4klm6ij9n+J2hyf0gzA8uvwDEq3X1Q7ZKeFrWcVTts/MRGYbdxSo=ILaUpPBC5", true, false]
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {byteArray}
*/
run(input, args) {
const [alphabet, removeNonAlphChars, strictMode] = args;
return fromBase64(input, alphabet, "byteArray", removeNonAlphChars, strictMode);
}
/**
* Highlight to Base64
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlight(pos, args) {
pos[0].start = Math.ceil(pos[0].start / 4 * 3);
pos[0].end = Math.floor(pos[0].end / 4 * 3);
return pos;
}
/**
* Highlight from Base64
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlightReverse(pos, args) {
pos[0].start = Math.floor(pos[0].start / 3 * 4);
pos[0].end = Math.ceil(pos[0].end / 3 * 4);
return pos;
}
}
export default FromBase64;