|
|
|
@ -1,7 +1,15 @@ |
|
|
|
import { Buffer } from "buffer"; |
|
|
|
import type { ImageProcessor } from "./main"; |
|
|
|
import pngv3 from "./pngv3"; |
|
|
|
import { fireNotification } from "./utils"; |
|
|
|
import f5 from 'f5stegojs'; |
|
|
|
import { settings } from "./stores"; |
|
|
|
import { decodeCoom3Payload } from "./utils"; |
|
|
|
|
|
|
|
export let csettings: Parameters<typeof settings['set']>[0]; |
|
|
|
|
|
|
|
settings.subscribe(b => { |
|
|
|
csettings = b; |
|
|
|
}); |
|
|
|
|
|
|
|
export const convertToPng = async (f: File): Promise<Blob | undefined> => { |
|
|
|
const can = document.createElement("canvas"); |
|
|
|
@ -32,7 +40,7 @@ export const convertToPng = async (f: File): Promise<Blob | undefined> => { |
|
|
|
can.width = dims[0]; |
|
|
|
can.height = dims[1]; |
|
|
|
const ctx = can.getContext("2d"); |
|
|
|
|
|
|
|
|
|
|
|
if (!ctx) |
|
|
|
return; |
|
|
|
ctx.drawImage(source, 0, 0, dims[0], dims[1]); |
|
|
|
@ -46,7 +54,21 @@ export const convertToPng = async (f: File): Promise<Blob | undefined> => { |
|
|
|
} |
|
|
|
}; |
|
|
|
|
|
|
|
const key = Buffer.from("CUNNYCUNNYCUNNY"); |
|
|
|
const f5inst = new f5(key); |
|
|
|
|
|
|
|
const injectTrue = async (b: File, links: string[]) => { |
|
|
|
// TODO: maybe do a lossless crop/embed/concat?
|
|
|
|
if (b.size / 20 < links.join(' ').length) |
|
|
|
throw "Image too small to embed."; |
|
|
|
const arr = new Uint8Array(await b.arrayBuffer()); |
|
|
|
const buff = f5inst.embed(arr, Buffer.from(links.join(' '))); |
|
|
|
return Buffer.from(buff); |
|
|
|
}; |
|
|
|
|
|
|
|
const inject = async (b: File, links: string[]) => { |
|
|
|
if (csettings.jpeg) |
|
|
|
return injectTrue(b, links); |
|
|
|
const pngfile = await convertToPng(b); |
|
|
|
if (!pngfile || pngfile.size > 3000 * 1024) { |
|
|
|
throw new Error("Couldn't convert file to PNG: resulting filesize too big."); |
|
|
|
@ -54,10 +76,35 @@ const inject = async (b: File, links: string[]) => { |
|
|
|
return pngv3.inject!(new File([pngfile], b.name), links); |
|
|
|
}; |
|
|
|
|
|
|
|
// unfortunately, because of the way f5 work, we can't determine
|
|
|
|
// if there's an embedded message until we have the complete file
|
|
|
|
// but the way PEE was designed forces us to just try to extract something until it works
|
|
|
|
const has_embed = (b: Buffer) => { |
|
|
|
if (!csettings.jpeg) |
|
|
|
return false; |
|
|
|
try { |
|
|
|
const res = f5inst.extract(b); |
|
|
|
if (!res) |
|
|
|
return; // unsure
|
|
|
|
if (res.length > 1024) // probably garbage, allows for ~20 links from take-me-to.space, should be enough
|
|
|
|
return; // unsure
|
|
|
|
const str = Buffer.from(res).toString(); |
|
|
|
if (!str.match(/^[a-zA-Z0-9:/.\-_ ]+$/)) |
|
|
|
return; // unsure
|
|
|
|
return str; // sure
|
|
|
|
} catch { |
|
|
|
return; // unsure
|
|
|
|
} |
|
|
|
}; |
|
|
|
|
|
|
|
const extract = (b: Buffer, ex: string) => { |
|
|
|
// if we reached here then ex is heckin cute and valid
|
|
|
|
return decodeCoom3Payload(Buffer.from(ex)); |
|
|
|
}; |
|
|
|
|
|
|
|
export default { |
|
|
|
skip: true, |
|
|
|
match: fn => !!fn.match(/\.jpe?g$/), |
|
|
|
has_embed: () => false, |
|
|
|
extract: () => [], |
|
|
|
has_embed, |
|
|
|
extract, |
|
|
|
inject |
|
|
|
} as ImageProcessor; |
coomdev
2 years ago