@hpke/core/script/src/exporterContext.js

A Hybrid Public Key Encryption (HPKE) core module for various JavaScript runtimes

(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", "@hpke/common", "./utils/emitNotSupported.js"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.SenderExporterContextImpl = exports.RecipientExporterContextImpl = exports.ExporterContextImpl = void 0;
    const common_1 = require("@hpke/common");
    const emitNotSupported_js_1 = require("./utils/emitNotSupported.js");
    // b"sec"
    const LABEL_SEC = new Uint8Array([115, 101, 99]);
    class ExporterContextImpl {
        constructor(api, kdf, exporterSecret) {
            Object.defineProperty(this, "_api", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: void 0
            });
            Object.defineProperty(this, "exporterSecret", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: void 0
            });
            Object.defineProperty(this, "_kdf", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: void 0
            });
            this._api = api;
            this._kdf = kdf;
            this.exporterSecret = exporterSecret;
        }
        async seal(_data, _aad) {
            return await (0, emitNotSupported_js_1.emitNotSupported)();
        }
        async open(_data, _aad) {
            return await (0, emitNotSupported_js_1.emitNotSupported)();
        }
        async export(exporterContext, len) {
            if (exporterContext.byteLength > common_1.INPUT_LENGTH_LIMIT) {
                throw new common_1.InvalidParamError("Too long exporter context");
            }
            try {
                return await this._kdf.labeledExpand(this.exporterSecret, LABEL_SEC, new Uint8Array(exporterContext), len);
            }
            catch (e) {
                throw new common_1.ExportError(e);
            }
        }
    }
    exports.ExporterContextImpl = ExporterContextImpl;
    class RecipientExporterContextImpl extends ExporterContextImpl {
    }
    exports.RecipientExporterContextImpl = RecipientExporterContextImpl;
    class SenderExporterContextImpl extends ExporterContextImpl {
        constructor(api, kdf, exporterSecret, enc) {
            super(api, kdf, exporterSecret);
            Object.defineProperty(this, "enc", {
                enumerable: true,
                configurable: true,
                writable: true,
                value: void 0
            });
            this.enc = enc;
            return;
        }
    }
    exports.SenderExporterContextImpl = SenderExporterContextImpl;
});