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@hpke/dhkem-x448@1.5.0
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dajiaji/hpke-js

A Hybrid Public Key Encryption (HPKE) module extension for X448.

This package works with Cloudflare Workers, Node.js, Deno, Bun, Browsers
This package works with Cloudflare Workers
This package works with Node.js
This package works with Deno
This package works with Bun
This package works with Browsers
JSR Score
88%
Published
2 days ago (1.5.0)

@hpke/dhkem-x448

JSR
A TypeScript Hybrid Public Key Encryption (HPKE) module extension for DH-KEM with X448, which is implemented by using @noble/curves

Index

Installation

Node.js

Using npm:

npm install @hpke/dhkem-x448

Using yarn:

yarn add @hpke/dhkem-x448

Deno

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-x448

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

import { Aes256Gcm, CipherSuite, HkdfSha256 } from "@hpke/core";
import { DhkemX448HkdfSha512 } from "@hpke/dhkem-x448";

HTTPS imoprt (deprecated):

import { CipherSuite, HkdfSha256 } from "https://deno.land/x/hpke/core/mod.ts";
import { DhkemX448HkdfSha512 } from "https://deno.land/x/hpke/x/dhkem-x448/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 x448 from "https://esm.sh/@hpke/dhkem-x448@<SEMVER>";
  // ...
</script>

<!-- use the latest stable version -->
<script type="module">
  import * as hpke from "https://esm.sh/@hpke/core";
  import * as x448 from "https://esm.sh/@hpke/dhkem-x448";
  // ...
</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 x448 from "https://unpkg.com/@hpke/dhkem-x448@<SEMVER>/esm/mod.js";
  // ...
</script>

Cloudflare Workers

git clone git@github.com:dajiaji/hpke-js.git
cd hpke-js/x/dhkem-x448
npm install -g esbuild
deno task dnt
deno task minify > $YOUR_SRC_PATH/hpke-dhkem-x448.js

Usage

This section shows some typical usage examples.

Node.js

import { Aes256Gcm, CipherSuite, HkdfSha512 } from "@hpke/core";
import { DhkemX448HkdfSha512 } from "@hpke/dhkem-x448";
// const { DhkemX448HkdfSha512 } = require("@hpke/dhkem-x448");

async function doHpke() {
  // setup
  const suite = new CipherSuite({
    kem: new DhkemX448HkdfSha512(),
    kdf: new HkdfSha512(),
    aead: new Aes256Gcm(),
  });

  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 { Aes256Gcm, CipherSuite, HkdfSha512 } from "@hpke/core";
import { DhkemX448HkdfSha512 } from "@hpke/dhkem-x448";

async function doHpke() {
  // setup
  const suite = new CipherSuite({
    kem: new DhkemX448HkdfSha512(),
    kdf: new HkdfSha512(),
    aead: new Aes256Gcm(),
  });

  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 {
        Aes256Gcm,
        CipherSuite,
        HkdfSha512,
      } from "https://esm.sh/@hpke/core@<SEMVER>";
      import { DhkemX448HkdfSha512 } from "https://esm.sh/@hpke/dhkem-x448@<SEMVER>";

      globalThis.doHpke = async () => {
        try {
          const suite = new CipherSuite({
            kem: new DhkemX448HkdfSha512(),
            kdf: new HkdfSha512(),
            aead: new Aes256Gcm(),
          });

          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, // rkp (CryptoKeyPair) is also acceptable.
            enc: sender.enc,
          });

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

          // Hello world!
          alert(new TextDecoder().decode(pt));
        } catch (err) {
          alert("failed:", err);
        }
      };
    </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.

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Add Package

deno add jsr:@hpke/dhkem-x448

Import symbol

import * as mod from "@hpke/dhkem-x448";

---- OR ----

Import directly with a jsr specifier

import * as mod from "jsr:@hpke/dhkem-x448";

Add Package

npx jsr add @hpke/dhkem-x448

Import symbol

import * as mod from "@hpke/dhkem-x448";

Add Package

yarn dlx jsr add @hpke/dhkem-x448

Import symbol

import * as mod from "@hpke/dhkem-x448";

Add Package

pnpm dlx jsr add @hpke/dhkem-x448

Import symbol

import * as mod from "@hpke/dhkem-x448";

Add Package

bunx jsr add @hpke/dhkem-x448

Import symbol

import * as mod from "@hpke/dhkem-x448";