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Tidied up Steganography operations. FileType and toBase64 functions now accept ArrayBuffers.

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This commit is contained in:
n1474335 2019-09-04 13:54:59 +01:00
parent 5bc5c0df90
commit eb769c7fb4
28 changed files with 81 additions and 75 deletions
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18
src/core/operations/ExtractLSB.mjs
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@ -6,8 +6,9 @@
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
import Utils from "../Utils";
import { isImage } from "../lib/FileType";
import Utils from "../Utils.mjs";
import { fromBinary } from "../lib/Binary.mjs";
import { isImage } from "../lib/FileType.mjs";
import jimp from "jimp";
/**
@ -24,8 +25,8 @@ class ExtractLSB extends Operation {
this.name = "Extract LSB";
this.module = "Image";
this.description = "Extracts the Least Significant Bit data from each pixel in an image. This is a common way to hide data in Steganography.";
this.infoURL = "https://en.wikipedia.org/wiki/Bit_numbering#Least_significant_bit_in_digital_steganography";
this.inputType = "byteArray";
this.infoURL = "https://wikipedia.org/wiki/Bit_numbering#Least_significant_bit_in_digital_steganography";
this.inputType = "ArrayBuffer";
this.outputType = "byteArray";
this.args = [
{
@ -62,9 +63,9 @@ class ExtractLSB extends Operation {
}
/**
* @param {File} input
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {File}
* @returns {byteArray}
*/
async run(input, args) {
if (!isImage(input)) throw new OperationError("Please enter a valid image file.");
@ -72,7 +73,7 @@ class ExtractLSB extends Operation {
const bit = 7 - args.pop(),
pixelOrder = args.pop(),
colours = args.filter(option => option !== "").map(option => COLOUR_OPTIONS.indexOf(option)),
parsedImage = await jimp.read(Buffer.from(input)),
parsedImage = await jimp.read(input),
width = parsedImage.bitmap.width,
height = parsedImage.bitmap.height,
rgba = parsedImage.bitmap.data;
@ -103,8 +104,7 @@ class ExtractLSB extends Operation {
}
}
return Utils.convertToByteArray(combinedBinary, "binary");
return fromBinary(combinedBinary);
}
}