Initial Version (Working relay implementing basic functionality)

utils/encryption.ts

@@ -0,0 +1,33 @@
+import { xchacha20poly1305 } from "@noble/ciphers/chacha";
+import { managedNonce } from "@noble/ciphers/webcrypto";
+import { decodeBase64 } from "jsr:@std/encoding/base64";
+export const encryptionKey = decodeBase64(Deno.env.get("ENCRYPTION_KEY") || "");
+
+/**
+ * Encrypts a given Uint8Array using the XChaCha20-Poly1305 algorithm.
+ *
+ * @param data - The data to be encrypted as a Uint8Array.
+ * @param key - The encryption key as a Uint8Array.
+ * @returns The encrypted data as a Uint8Array.
+ */
+
+export function encryptUint8Array(
+  data: Uint8Array,
+  key: Uint8Array,
+): Uint8Array {
+  return managedNonce(xchacha20poly1305)(key).encrypt(data);
+}
+
+/**
+ * Decrypts a given Uint8Array using the XChaCha20-Poly1305 algorithm.
+ *
+ * @param data - The data to be decrypted as a Uint8Array.
+ * @param key - The decryption key as a Uint8Array.
+ * @returns The decrypted data as a Uint8Array.
+ */
+export function decryptUint8Array(
+  data: Uint8Array,
+  key: Uint8Array,
+): Uint8Array {
+  return managedNonce(xchacha20poly1305)(key).decrypt(data);
+}