@hpke/chacha20poly1305/script/src/chacha20Poly1305.js

A Hybrid Public Key Encryption (HPKE) module extension for ChaCha20/Poly1305

(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "./chacha/chacha.js", "@hpke/common"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.Chacha20Poly1305 = exports.Chacha20Poly1305Context = void 0;
    const chacha_js_1 = require("./chacha/chacha.js");
    const common_1 = require("@hpke/common");
    class Chacha20Poly1305Context {
        constructor(key) {
            Object.defineProperty(this, "_key", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: void 0
            });
            this._key = new Uint8Array((0, common_1.toArrayBuffer)(key));
        }
        async seal(iv, data, aad) {
            return await this._seal((0, common_1.toArrayBuffer)(iv), (0, common_1.toArrayBuffer)(data), (0, common_1.toArrayBuffer)(aad));
        }
        async open(iv, data, aad) {
            return await this._open((0, common_1.toArrayBuffer)(iv), (0, common_1.toArrayBuffer)(data), (0, common_1.toArrayBuffer)(aad));
        }
        _seal(iv, data, aad) {
            return new Promise((resolve) => {
                const ret = (0, chacha_js_1.chacha20poly1305)(this._key, new Uint8Array(iv), new Uint8Array(aad)).encrypt(new Uint8Array(data));
                resolve(ret.buffer);
            });
        }
        _open(iv, data, aad) {
            return new Promise((resolve) => {
                const ret = (0, chacha_js_1.chacha20poly1305)(this._key, new Uint8Array(iv), new Uint8Array(aad)).decrypt(new Uint8Array(data));
                resolve(ret.buffer);
            });
        }
    }
    exports.Chacha20Poly1305Context = Chacha20Poly1305Context;
    /**
     * The ChaCha20Poly1305 for HPKE AEAD implementing {@link AeadInterface}.
     *
     * When using `@hpke/core`, the instance of this class can be specified
     * to the `aead` parameter of {@link CipherSuiteParams} instead of `AeadId.Chacha20Poly1305`
     * as follows:
     *
     * @example
     *
     * ```ts
     * import {
     *   CipherSuite,
     *   DhkemP256HkdfSha256,
     *   HkdfSha256,
     * } from "@hpke/core";
     * import {
     *   Chacha20Poly1305,
     * } from "@hpke/chacha20poly1305";
     *
     * const suite = new CipherSuite({
     *   kem: new DhkemP256HkdfSha256(),
     *   kdf: new HkdfSha256(),
     *   aead: new Chacha20Poly1305(),
     * });
     * ```
     *
     * This class is implemented using
     * {@link https://github.com/paulmillr/noble-ciphers | @noble/ciphers}.
     */
    class Chacha20Poly1305 {
        constructor() {
            /** AeadId.Chacha20Poly1305 (0x0003) */
            Object.defineProperty(this, "id", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: common_1.AeadId.Chacha20Poly1305
            });
            /** 32 */
            Object.defineProperty(this, "keySize", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: 32
            });
            /** 12 */
            Object.defineProperty(this, "nonceSize", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: 12
            });
            /** 16 */
            Object.defineProperty(this, "tagSize", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: 16
            });
        }
        createEncryptionContext(key) {
            return new Chacha20Poly1305Context(key);
        }
    }
    exports.Chacha20Poly1305 = Chacha20Poly1305;
});