feat(winter-cg): crypto, atob, btoa (#10577)

apps/toolbox/src/main-page.xml

@@ -25,6 +25,7 @@
         <Button text="visibility-vs-hidden" tap="{{ viewDemo }}" class="btn btn-primary btn-view-demo" />
         <Button text="fs-helper" tap="{{ viewDemo }}" class="btn btn-primary btn-view-demo" />
         <Button text="webview" tap="{{ viewDemo }}" class="btn btn-primary btn-view-demo" />
+        <Button text="winter-cg" tap="{{ viewDemo }}" class="btn btn-primary btn-view-demo" />
       </StackLayout>
     </ScrollView>
   </StackLayout>

apps/toolbox/src/pages/winter-cg.ts

@@ -0,0 +1,109 @@
+import { Page, EventData, Application, File, Folder, knownFolders, path, getFileAccess, Utils, Screen, Http, AndroidDirectory, ImageSource, alert } from '@nativescript/core';
+
+let page: Page;
+
+export function navigatingTo(args: EventData) {
+	page = <Page>args.object;
+	run();
+}
+
+function run() {
+	console.log(crypto.randomUUID());
+
+	const buf = new BigUint64Array(3);
+
+	crypto.getRandomValues(buf);
+
+	console.log(buf);
+
+	const text = 'An obscure body in the S-K System, your majesty. The inhabitants refer to it as the planet Earth.';
+
+	async function digestMessage(message) {
+		const encoder = new TextEncoder();
+		const data = encoder.encode(message);
+		console.time('digestMessage');
+		const hash = await crypto.subtle.digest('SHA-256', data);
+		console.timeEnd('digestMessage');
+		return hash;
+	}
+
+	digestMessage(text).then((digestBuffer) => {
+		console.log(digestBuffer.byteLength);
+		console.log(new Uint8Array(digestBuffer));
+	});
+
+	gen_hmac();
+
+	gen_rsa_oaep();
+}
+
+export function encodeDecode() {
+	const encoded = btoa('Osei');
+
+	console.log(encoded);
+
+	console.log(atob(encoded) === 'Osei');
+}
+
+async function gen_hmac() {
+	let message = 'Hello World';
+	let enc = new TextEncoder();
+	const encoded = enc.encode(message);
+
+	const key = await crypto.subtle.generateKey(
+		{
+			name: 'HMAC',
+			hash: { name: 'SHA-512' },
+		},
+		true,
+		['sign', 'verify'],
+	);
+
+	const signature = await crypto.subtle.sign('HMAC', key, encoded);
+
+	let result = await crypto.subtle.verify('HMAC', key, signature, encoded);
+
+	console.log('gen_hmac is valid? ', result);
+}
+
+async function gen_rsa_oaep() {
+	let message = 'Hello World';
+	let enc = new TextEncoder();
+	const encoded = enc.encode(message);
+
+	const kp = await crypto.subtle.generateKey(
+		{
+			name: 'RSA-OAEP',
+			modulusLength: 4096,
+			publicExponent: new Uint8Array([1, 0, 1]),
+			hash: 'SHA-256',
+		},
+		true,
+		['encrypt', 'decrypt'],
+	);
+
+	try {
+		const ciphertext = await crypto.subtle.encrypt(
+			{
+				name: 'RSA-OAEP',
+			},
+			kp.publicKey,
+			encoded,
+		);
+
+		let decrypted = await crypto.subtle.decrypt(
+			{
+				name: 'RSA-OAEP',
+			},
+			kp.privateKey,
+			ciphertext,
+		);
+
+		let dec = new TextDecoder();
+		const decryptedValue = dec.decode(decrypted);
+
+		console.log('decryptedValue', decryptedValue, decryptedValue === message);
+	} catch (error) {
+		console.log('gen: error', error);
+	}
+}

apps/toolbox/src/pages/winter-cg.xml

@@ -0,0 +1,6 @@
+<Page xmlns="http://schemas.nativescript.org/tns.xsd" navigatingTo="navigatingTo" class="page">
+
+   <StackLayout>
+            <Button text="Btoa y Atob" tap="encodeDecode" />
+    </StackLayout>
+</Page>