Starting from version 1.3.0, hpke-js packages are available from the JSR registry. From this version onwards, please use JSR import instead of HTTPS import in Deno.

JSR imoprt (recommended on >=1.3.0):

Add hpke-js packages using the commands below:

deno add @hpke/core
deno add @hpke/dhkem-x25519

Then, you can use the module from code like this:

import { Aes128Gcm, CipherSuite, HkdfSha256 } from "@hpke/core";
import { DhkemX25519HkdfSha256 } from "@hpke/dhkem-x25519";

HTTPS imoprt (deprecated):

import {
  Aes128Gcm,
  CipherSuite,
  HkdfSha256,
} from "https://deno.land/x/hpke/core/mod.ts";
import { DhkemX25519HkdfSha256 } from "https://deno.land/x/hpke/x/dhkem-x25519/mod.ts";

Web Browsers

Followings are how to use this module with typical CDNs. Other CDNs can be used as well.

Using esm.sh:

<!-- use a specific version -->
<script type="module">
  import * as hpke from "https://esm.sh/@hpke/core@<SEMVER>";
  import * as x25519 from "https://esm.sh/@hpke/dhkem-x25519@<SEMVER>";
  // ...
</script>

<!-- use the latest stable version -->
<script type="module">
  import * as hpke from "https://esm.sh/@hpke/core";
  import * as x25519 from "https://esm.sh/@hpke/dhkem-x25519";
  // ...
</script>

Using unpkg:

<!-- use a specific version -->
<script type="module">
  import * as hpke from "https://unpkg.com/@hpke/core@<SEMVER>/esm/mod.js";
  import * as x25519 from "https://unpkg.com/@hpke/dhkem-x25519@<SEMVER>/esm/mod.js";
  // ...
</script>

Cloudflare Workers

git clone git@github.com:dajiaji/hpke-js.git
cd hpke-js/x/dhkem-x25519
npm install -g esbuild
deno task dnt
deno task minify > $YOUR_SRC_PATH/hpke-dhkem-x25519.js

Usage

This section shows some typical usage examples.

Node.js

import { Aes128Gcm, CipherSuite, HkdfSha256 } from "@hpke/core";
import { DhkemX25519HkdfSha256 } from "@hpke/dhkem-x25519";
// const { DhkemX25519HkdfSha256 } = require("@hpke/dhkem-x25519");

async function doHpke() {
  // setup
  const suite = new CipherSuite({
    kem: new DhkemX25519HkdfSha256(),
    kdf: new HkdfSha256(),
    aead: new Aes128Gcm(),
  });

  const rkp = await suite.kem.generateKeyPair();

  const sender = await suite.createSenderContext({
    recipientPublicKey: rkp.publicKey,
  });

  // encrypt
  const ct = await sender.seal(new TextEncoder().encode("Hello world!"));

  const recipient = await suite.createRecipientContext({
    recipientKey: rkp.privateKey,
    enc: sender.enc,
  });

  // decrypt
  const pt = await recipient.open(ct);

  // Hello world!
  console.log(new TextDecoder().decode(pt));
}

try {
  doHpke();
} catch (err) {
  console.log("failed:", err.message);
}

Deno

import { Aes128Gcm, CipherSuite, HkdfSha256 } from "@hpke/core";
import { DhkemX25519HkdfSha256 } from "@hpke/dhkem-x25519";

async function doHpke() {
  // setup
  const suite = new CipherSuite({
    kem: new DhkemX25519HkdfSha256(),
    kdf: new HkdfSha256(),
    aead: new Aes128Gcm(),
  });

  const rkp = await suite.kem.generateKeyPair();

  const sender = await suite.createSenderContext({
    recipientPublicKey: rkp.publicKey,
  });

  // encrypt
  const ct = await sender.seal(new TextEncoder().encode("Hello world!"));

  const recipient = await suite.createRecipientContext({
    recipientKey: rkp.privateKey,
    enc: sender.enc,
  });

  // decrypt
  const pt = await recipient.open(ct);

  // Hello world!
  console.log(new TextDecoder().decode(pt));
}

try {
  doHpke();
} catch (_err: unknown) {
  console.log("failed.");
}

Browsers

<html>
  <head></head>
  <body>
    <script type="module">
      import { Aes128Gcm, CipherSuite, HkdfSha256 } from "https://esm.sh/@hpke/core@<SEMVER>";
      import { DhkemX25519HkdfSha256 } from "https://esm.sh/@hpke/dhkem-x25519@<SEMVER>";

      globalThis.doHpke = async () => {
        try {
          const suite = new CipherSuite({
            kem: new DhkemX25519HkdfSha256(),
            kdf: new HkdfSha256(),
            aead: new Aes128Gcm(),
          });
 
          const rkp = await suite.kem.generateKeyPair();
      
          const sender = await suite.createSenderContext({
            recipientPublicKey: rkp.publicKey
          });

          const recipient = await suite.createRecipientContext({
            recipientKey: rkp.privateKey, // rkp (CryptoKeyPair) is also acceptable.
            enc: sender.enc,
          });

          // encrypt
          const ct = await sender.seal(new TextEncoder().encode("Hello world!"));
      
          // decrypt
          const pt = await recipient.open(ct);

          // Hello world!
          alert(new TextDecoder().decode(pt));
        } catch (err) {
          alert("failed:", err.message);
        }
      }
    </script>
    <button type="button" onclick="doHpke()">do HPKE</button>
  </body>
</html>

Contributing

We welcome all kind of contributions, filing issues, suggesting new features or sending PRs.

Keywords

FAQs

What is @hpke/dhkem-x25519?

Is @hpke/dhkem-x25519 popular?

Is @hpke/dhkem-x25519 well maintained?

Package last updated on 01 Sep 2024

Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install