@hpke/dhkem-x25519

Index

- Installation
- Node.js
- Deno
- Web Browsers
- Usage
- Contributing

Installation

@hpke/dhkem-x25519 need to be used with
@hpke/core,
which can be installed in the same manner as desribed below.

$3

You can install the package with npm, yarn or pnpm.

``sh


Using npm:

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

$3

For Deno, it is recommended to use the jsr.io registry.

`sh
deno add jsr:@hpke/dhkem-x25519
`

$3

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

Using esm.sh:

`html





`

Using unpkg:

`html


`

Usage

This section shows some typical usage examples.

$3

`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);
}
`

$3

`ts
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.");
}
`

$3

`html




do HPKE


``

Contributing

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