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import { browser } from "$app/environment";
import { validateSignature } from "./keystore";
export const canaries: Canary[] = [];
export interface CanaryInterface {
name: string,
description: string,
signer: string,
url: string,
keyIdentifier: string,
contentType: string,
upstream?: string
}
export interface Canary extends CanaryInterface { }
type _PreCanaryInterfaceEntries = {
[T in keyof CanaryInterface]: [T, CanaryInterface[T]]
}
type CanaryInterfaceEntry = _PreCanaryInterfaceEntries[keyof _PreCanaryInterfaceEntries]
export class Canary {
public constructor(
canary: CanaryInterface
) {
const entries = Object.entries(canary) as CanaryInterfaceEntry[];
for (const a of entries) {
// @ts-ignore we know the value will match in type
this[a[0]] = a[1];
}
canaries.push(this);
}
public forceContentType = false;
public async getRawText() {
if (!browser) throw new Error('This should only be done in a browser.')
const res = await fetch(this.url)
if (res.ok) {
if (!this.forceContentType) this.contentType = res.headers.get('Content-Type') || this.contentType
const text = await res.text()
return text
} else {
throw new Error(`Fetching canary failed with code ${res.status} (${res.statusText}):
${await res.text().catch(e => `Unknown (Unable to get text, ${JSON.stringify(e)})`)}`)
}
}
public async getValidatedText(rawText: string | Promise<string> = this.getRawText()) {
return await validateSignature(await rawText, this.keyIdentifier)
}
/** Returns downloadable data url if signature passes, otherwise returns null */
public async getUrl(rawText: string | Promise<string> = this.getRawText()) {
const t = await rawText;
let stripped: string;
try {
stripped = await this.getValidatedText(t);
} catch (error) {
console.warn('Failed to validate signature: ', error);
return null;
}
return {
stripped: URL.createObjectURL(new Blob([stripped], {
type: this.contentType,
})),
signed: URL.createObjectURL(new Blob([t], {
type: this.contentType,
})),
}
}
}
new Canary(
{
name: 'estrogen.zone',
description: 'Services hosted around estrogen.zone and yuridick.gay',
signer: 'memdmp',
url: '/canaries/memdmp:estrogen.zone',
keyIdentifier: 'memdmp',
contentType: 'text/plain; charset=utf-8'
}
);
new Canary(
{
name: 'kyun.host',
description: 'The VPS provider "kyun.host"',
signer: 'napatha',
url: '/canaries/napatha:kyun.host',
keyIdentifier: 'napatha',
contentType: 'text/plain; charset=utf-8',
upstream: 'https://files.kyun.host/canary.txt'
}
);
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