feat: add two factor auth (#643)

Add two factor authentication for users who wish to enhance the security of their accounts.

packages/lib/universal/crypto.ts

@@ -0,0 +1,32 @@
+import { xchacha20poly1305 } from '@noble/ciphers/chacha';
+import { bytesToHex, hexToBytes, utf8ToBytes } from '@noble/ciphers/utils';
+import { managedNonce } from '@noble/ciphers/webcrypto/utils';
+import { sha256 } from '@noble/hashes/sha256';
+
+export type SymmetricEncryptOptions = {
+  key: string;
+  data: string;
+};
+
+export const symmetricEncrypt = ({ key, data }: SymmetricEncryptOptions) => {
+  const keyAsBytes = sha256(key);
+  const dataAsBytes = utf8ToBytes(data);
+
+  const chacha = managedNonce(xchacha20poly1305)(keyAsBytes); // manages nonces for you
+
+  return bytesToHex(chacha.encrypt(dataAsBytes));
+};
+
+export type SymmetricDecryptOptions = {
+  key: string;
+  data: string;
+};
+
+export const symmetricDecrypt = ({ key, data }: SymmetricDecryptOptions) => {
+  const keyAsBytes = sha256(key);
+  const dataAsBytes = hexToBytes(data);
+
+  const chacha = managedNonce(xchacha20poly1305)(keyAsBytes); // manages nonces for you
+
+  return chacha.decrypt(dataAsBytes);
+};