Class HpkeRecipientChannel

Example

const alice = new HpkeSenderChannel();
const bob = new HpkeRecipientChannel();

let aad = "AAD";
let aadBytes = new TextEncoder().encode(aad);

const { message, channel: aliceUnidirectional } = alice.establishChannel(
    bob.publicKey,
    "It's a secret to everybody",
    aadBytes,
);

const { message: initialMessage, channel: bobUnidirectional } = bob.establishChannel(message, aadBytes);

let aadTwo = "AADTWO";
let aadTwoBytes = new TextEncoder().encode(aad);

const { initialResponse, channel: bobEstablished } = bobUnidirectional.establishBidirectionalChannel(
    "Initial response",
    aadTwoBytes,
);
const { initialResponse: secondPlaintext, channel: aliceEstablished } =
    aliceUnidirectional.establishBidirectionalChannel(initialResponse, aadTwoBytes);

const aliceCheck = aliceEstablished.checkCode;
const bobCheck = bobEstablished.checkCode;

// Compare the check codes here and only proceed if they match.

const ciphertext = bobEstablished.seal("Other message", []);
const thirdPlaintext = aliceEstablished.open(ciphertext, []);

expect(thirdPlaintext).toStrictEqual("Other message");
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