A Hybrid Public Key Encryption (HPKE) module for various JavaScript runtimes
Documentation: jsr.io | pages (only for the latest ver.)
Where possible, it is recommended to use @hpke/core along with extension
modules (such as @hpke/chacha20poly1305) instead of hpke-js.
You can install the package with npm, yarn or pnpm.
# Using npm:
npm install hpke-js
yarn add hpke-js
pnpm install hpke-js
# Using jsr:
npx jsr add hpke-js
yarn dlx jsr add hpke-js
pnpm dlx jsr add hpke-js
The above manner can be used with other JavaScript runtimes that support npm, such as Cloudflare Workers and Bun.
Then, you can use the module from code like this:
import { AeadId, CipherSuite, KdfId, KemId } from "hpke-js";
For Deno, it is recommended to use the jsr.io registry.
deno add jsr:@hpke/hpke-js
Followings are how to use the module with typical CDNs. Other CDNs can be used as well.
Using esm.sh:
<!-- use a specific version -->
<script type="module">
import {
AeadId,
CipherSuite,
KdfId,
KemId,
} from "https://esm.sh/hpke-js@<SEMVER>";
// import * as hpke from "https://esm.sh/@hpke/core@<SEMVER>";
// ...
</script>
<!-- use the latest stable version -->
<script type="module">
import { AeadId, CipherSuite, KdfId, KemId } from "https://esm.sh/hpke-js";
// import * as hpke from "https://esm.sh/@hpke/core";
// ...
</script>
Using unpkg:
<!-- use a specific version -->
<script type="module">
import {
AeadId,
CipherSuite,
KdfId,
KemId,
} from "https://unpkg.com/hpke-js@<SEMVER>/esm/mod.js";
// import * as hpke from "https://unpkg.com/@hpke/core@<SEMVER>/esm/mod.js";
// ...
</script>
This section shows some typical usage examples.
import { AeadId, CipherSuite, KdfId, KemId } from "hpke-js";
async function doHpke() {
const suite = new CipherSuite({
kem: KemId.DhkemX25519HkdfSha256,
kdf: KdfId.HkdfSha256,
aead: AeadId.Chacha20Poly1305,
});
// A recipient generates a key pair.
const rkp = await suite.kem.generateKeyPair();
// A sender encrypts a message with the recipient public key.
const sender = await suite.createSenderContext({
recipientPublicKey: rkp.publicKey,
});
const ct = await sender.seal(new TextEncoder().encode("Hello world!"));
// The recipient decrypts it.
const recipient = await suite.createRecipientContext({
recipientKey: rkp.privateKey,
enc: sender.enc,
});
const pt = await recipient.open(ct);
// Hello world!
console.log("decrypted: ", new TextDecoder().decode(pt));
}
try {
doHpke();
} catch (e) {
console.log("failed:", e.message);
}
import { AeadId, CipherSuite, KdfId, KemId } from "@hpke/hpke-js";
async function doHpke() {
const suite = new CipherSuite({
kem: KemId.DhkemX25519HkdfSha256,
kdf: KdfId.HkdfSha256,
aead: AeadId.Chacha20Poly1305,
});
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.");
}
<html>
<head></head>
<body>
<script type="module">
import { AeadId, CipherSuite, KdfId, KemId } from "https://esm.sh/hpke-js";
globalThis.doHpke = async () => {
try {
const suite = new CipherSuite({
kem: KemId.DhkemP256HkdfSha256,
kdf: KdfId.HkdfSha256,
aead: AeadId.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, // 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.message);
}
};
</script>
<button type="button" onclick="doHpke()">do HPKE</button>
</body>
</html>
We welcome all kind of contributions, filing issues, suggesting new features or sending PRs.
FAQs
A Hybrid Public Key Encryption (HPKE) module for various JavaScript runtimes
We found that hpke-js demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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