https://selectagents.gov/TemplatePackage/contrib/libs/cdc/c2r/c2r.js?_=19284

1import { createC2pa } from '/TemplatePackage/contrib/libs/c2pa/latest/c2pa.esm.min.js';
2
3(async () => {
4	const ROOT = String(window.CDC?.tpPath || '').trim();
5	const c2pa = await createC2pa({
6		wasmSrc: `${ROOT}/TemplatePackage/contrib/libs/c2pa/latest/toolkit_bg.wasm`,
7		workerSrc: `${ROOT}/TemplatePackage/contrib/libs/c2pa/latest/c2pa.worker.min.js`,
8	});
9
10	const DEBUG = !!window.location?.search?.includes('cdcdebug');
11	const manifests = {};
12
13	// expose as recallable method
14	window.cdcc2paCheck = () => {
15		Array.from(document.getElementsByTagName('img')).forEach(async (image) => {
16			// skip images in page headers, footers, or non-indexed content, or images already checked
17			if (image?.closest('header, footer, .noindex, #hero-carousel')) {
18				return;
19			}
20			// skip some extensions
21			if (!image.src || image.src.match(/\.(svg|axd|gif|bmp)([#\?]|$)/i)) {
22				return;
23			}
24
25			let manifestStore = null;
26			if (manifests.hasOwnProperty(image.src)) {
27				manifestStore = manifests[image.src];
28			} else {
29				// Get a manifest store for the image
30				try {
31					let manifest = await c2pa.read(image);
32					manifestStore = manifest.manifestStore;
33				} catch (e) {
34					DEBUG && console.error(`C2R: failed checking image:`, image, e);
35					return;
36				}
37				manifests[image.src] = manifestStore
38			}
39			const manifestFlat = JSON.stringify(manifestStore?.activeManifest?.assertions?.data || {});
40			const manifestCheck = manifestFlat.includes('cv.iptc.org/newscodes/digitalsourcetype/compositeWithTrainedAlgorithmicMedia') ||
41				manifestFlat.includes('cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia');
42
43			DEBUG && console.info(`C2R: ${manifestCheck?'Y':'n'}`, image, manifestStore);
44			if (manifestStore && manifestCheck) {
45				const details = {
46					generator: String(manifestStore.activeManifest?.claimGenerator || ''),
47					tools: [],
48					issuer: '',
49					date: '',
50				};
51				if (Array.isArray(manifestStore.activeManifest?.assertions?.data)) {
52					manifestStore.activeManifest.assertions.data.forEach((assertion) => {
53						let assertionData = assertion?.data;
54						if (assertionData) {
55							assertionData.actions.forEach((action) => {
56								if (action.digitalSourceType.includes('cv.iptc.org/newscodes/digitalsourcetype/compositeWithTrainedAlgorithmicMedia') ||
57									action.digitalSourceType.includes('cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia')) {
58									details.tools.push(action?.softwareAgent);
59								}
60							});
61						}
62					});
63				}
64				details.issuer = String(manifestStore.activeManifest?.signatureInfo?.issuer || '');
65				details.date   = String(manifestStore.activeManifest?.signatureInfo?.time || '');
66				// dispatch event and flag to avoid retriggering
67				image.dispatchEvent(new CustomEvent('cdc-image-c2r', { detail: details, bubbles: true }));
68			}
69		});
70	}
71	if (document.readyState === 'loading') {
72		document.addEventListener('DOMContentLoaded', window.cdcc2paCheck);
73	} else {
74		window.cdcc2paCheck();
75	}
76})();