From e8f91316ffd280715a3e90177a5b04068689883d Mon Sep 17 00:00:00 2001 From: MikeCAT Date: Wed, 20 Oct 2021 21:28:48 +0900 Subject: [PATCH] Added ROT13/47 Brute Force --- src/core/config/Categories.json | 2 + src/core/operations/ROT13BruteForce.mjs | 102 ++++++++++++++++++++++++ src/core/operations/ROT47BruteForce.mjs | 82 +++++++++++++++++++ 3 files changed, 186 insertions(+) create mode 100644 src/core/operations/ROT13BruteForce.mjs create mode 100644 src/core/operations/ROT47BruteForce.mjs diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json index 09ee8d15..1369267a 100644 --- a/src/core/config/Categories.json +++ b/src/core/config/Categories.json @@ -82,7 +82,9 @@ "RC4", "RC4 Drop", "ROT13", + "ROT13 Brute Force", "ROT47", + "ROT47 Brute Force", "XOR", "XOR Brute Force", "Vigenère Encode", diff --git a/src/core/operations/ROT13BruteForce.mjs b/src/core/operations/ROT13BruteForce.mjs new file mode 100644 index 00000000..bdf9d40a --- /dev/null +++ b/src/core/operations/ROT13BruteForce.mjs @@ -0,0 +1,102 @@ +/** + * @author MikeCAT + * @license Apache-2.0 + */ + +import Operation from "../Operation.mjs"; +import Utils from "../Utils.mjs"; + +/** + * ROT13 Brute Force operation. + */ +class ROT13BruteForce extends Operation { + + /** + * ROT13BruteForce constructor + */ + constructor() { + super(); + + this.name = "ROT13 Brute Force"; + this.module = "Default"; + this.description = "Try all meaningful amounts for ROT13.

Optionally you can enter your known plaintext (crib) to filter the result."; + this.infoURL = "https://wikipedia.org/wiki/ROT13"; + this.inputType = "byteArray"; + this.outputType = "string"; + this.args = [ + { + name: "Rotate lower case chars", + type: "boolean", + value: true + }, + { + name: "Rotate upper case chars", + type: "boolean", + value: true + }, + { + name: "Rotate numbers", + type: "boolean", + value: false + }, + { + "name": "Sample length", + "type": "number", + "value": 100 + }, + { + "name": "Sample offset", + "type": "number", + "value": 0 + }, + { + "name": "Print amount", + "type": "boolean", + "value": true + }, + { + "name": "Crib (known plaintext string)", + "type": "string", + "value": "" + } + ]; + } + + /** + * @param {byteArray} input + * @param {Object[]} args + * @returns {string} + */ + run(input, args) { + const [rotateLower, rotateUpper, rotateNum, sampleLength, sampleOffset, printAmount, crib] = args; + const sample = input.slice(sampleOffset, sampleOffset + sampleLength); + const cribLower = crib.toLowerCase(); + const lowerStart = "a".charCodeAt(0), upperStart = "A".charCodeAt(0), numStart = "0".charCodeAt(0); + const result = []; + for (let amount = 1; amount < 26; amount++) { + const rotated = sample.slice(); + for (let i = 0; i < rotated.length; i++) { + if (rotateLower && lowerStart <= rotated[i] && rotated[i] < lowerStart + 26) { + rotated[i] = (rotated[i] - lowerStart + amount) % 26 + lowerStart; + } else if (rotateUpper && upperStart <= rotated[i] && rotated[i] < upperStart + 26) { + rotated[i] = (rotated[i] - upperStart + amount) % 26 + upperStart; + } else if (rotateNum && numStart <= rotated[i] && rotated[i] < numStart + 10) { + rotated[i] = (rotated[i] - numStart + amount) % 10 + numStart; + } + } + const rotatedString = Utils.byteArrayToUtf8(rotated); + if (rotatedString.toLowerCase().indexOf(cribLower) >= 0) { + const rotatedStringPrintable = Utils.printable(rotatedString, false); + if (printAmount) { + const amountStr = "Amount = " + (" " + amount).slice(-2) + ": "; + result.push(amountStr + rotatedStringPrintable); + } else { + result.push(rotatedStringPrintable); + } + } + } + return result.join("\n"); + } +} + +export default ROT13BruteForce; diff --git a/src/core/operations/ROT47BruteForce.mjs b/src/core/operations/ROT47BruteForce.mjs new file mode 100644 index 00000000..5fce5259 --- /dev/null +++ b/src/core/operations/ROT47BruteForce.mjs @@ -0,0 +1,82 @@ +/** + * @author MikeCAT + * @license Apache-2.0 + */ + +import Operation from "../Operation.mjs"; +import Utils from "../Utils.mjs"; + +/** + * ROT47 Brute Force operation. + */ +class ROT47BruteForce extends Operation { + + /** + * ROT47BruteForce constructor + */ + constructor() { + super(); + + this.name = "ROT47 Brute Force"; + this.module = "Default"; + this.description = "Try all meaningful amounts for ROT47.

Optionally you can enter your known plaintext (crib) to filter the result."; + this.infoURL = "https://wikipedia.org/wiki/ROT13#Variants"; + this.inputType = "byteArray"; + this.outputType = "string"; + this.args = [ + { + "name": "Sample length", + "type": "number", + "value": 100 + }, + { + "name": "Sample offset", + "type": "number", + "value": 0 + }, + { + "name": "Print amount", + "type": "boolean", + "value": true + }, + { + "name": "Crib (known plaintext string)", + "type": "string", + "value": "" + } + ]; + } + + /** + * @param {byteArray} input + * @param {Object[]} args + * @returns {string} + */ + run(input, args) { + const [sampleLength, sampleOffset, printAmount, crib] = args; + const sample = input.slice(sampleOffset, sampleOffset + sampleLength); + const cribLower = crib.toLowerCase(); + const result = []; + for (let amount = 1; amount < 94; amount++) { + const rotated = sample.slice(); + for (let i = 0; i < rotated.length; i++) { + if (33 <= rotated[i] && rotated[i] <= 126) { + rotated[i] = (rotated[i] - 33 + amount) % 94 + 33; + } + } + const rotatedString = Utils.byteArrayToUtf8(rotated); + if (rotatedString.toLowerCase().indexOf(cribLower) >= 0) { + const rotatedStringPrintable = Utils.printable(rotatedString, false); + if (printAmount) { + const amountStr = "Amount = " + (" " + amount).slice(-2) + ": "; + result.push(amountStr + rotatedStringPrintable); + } else { + result.push(rotatedStringPrintable); + } + } + } + return result.join("\n"); + } +} + +export default ROT47BruteForce;