Merge pull request #329 from dajiaji/add-samples-deno-for-chacha20poly1305

Add samples/deno to x/chacha20poly1305.

Author: dajiaji

x/chacha20poly1305/samples/deno/deno.json

@@ -0,0 +1,10 @@
+{
+  "tasks": {
+    "dev": "deno run --watch main.ts"
+  },
+  "imports": {
+    "@hpke/chacha20poly1305": "jsr:@hpke/chacha20poly1305@^1.2.9",
+    "@hpke/core": "jsr:@hpke/core@^1.2.9",
+    "@std/assert": "jsr:@std/assert@1"
+  }
+}

x/chacha20poly1305/samples/deno/deno.lock

@@ -0,0 +1,37 @@
+import { CipherSuite, DhkemP256HkdfSha256, HkdfSha256 } from "@hpke/core";
+import { Chacha20Poly1305 } from "@hpke/chacha20poly1305";
+
+async function doHpke() {
+  // setup
+  const suite = new CipherSuite({
+    kem: new DhkemP256HkdfSha256(),
+    kdf: new HkdfSha256(),
+    aead: new Chacha20Poly1305(),
+  });
+
+  const rkp = await suite.kem.generateKeyPair();
+
+  const sender = await suite.createSenderContext({
+    recipientPublicKey: rkp.publicKey,
+  });
+
+  const recipient = await suite.createRecipientContext({
+    recipientKey: rkp.privateKey,
+    enc: sender.enc,
+  });
+
+  // encrypt
+  const ct = await sender.seal(new TextEncoder().encode("Hello world!"));
+
+  // decrypt
+  const pt = await recipient.open(ct);
+
+  // Hello world!
+  console.log(new TextDecoder().decode(pt));
+}
+
+try {
+  doHpke();
+} catch (_err: unknown) {
+  console.log("doHPKE() failed.");
+}