69 lines
6.8 KiB
JavaScript
69 lines
6.8 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.supportsZeroByteGCM = exports.supportsSubtleCrypto = exports.supportsSecureRandom = exports.supportsWebCrypto = void 0;
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var tslib_1 = require("tslib");
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var subtleCryptoMethods = [
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"decrypt",
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"digest",
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"encrypt",
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"exportKey",
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"generateKey",
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"importKey",
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"sign",
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"verify"
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];
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function supportsWebCrypto(window) {
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if (supportsSecureRandom(window) &&
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typeof window.crypto.subtle === "object") {
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var subtle = window.crypto.subtle;
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return supportsSubtleCrypto(subtle);
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}
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return false;
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}
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exports.supportsWebCrypto = supportsWebCrypto;
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function supportsSecureRandom(window) {
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if (typeof window === "object" && typeof window.crypto === "object") {
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var getRandomValues = window.crypto.getRandomValues;
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return typeof getRandomValues === "function";
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}
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return false;
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}
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exports.supportsSecureRandom = supportsSecureRandom;
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function supportsSubtleCrypto(subtle) {
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return (subtle &&
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subtleCryptoMethods.every(function (methodName) { return typeof subtle[methodName] === "function"; }));
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}
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exports.supportsSubtleCrypto = supportsSubtleCrypto;
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function supportsZeroByteGCM(subtle) {
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return tslib_1.__awaiter(this, void 0, void 0, function () {
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var key, zeroByteAuthTag, _a;
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return tslib_1.__generator(this, function (_b) {
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switch (_b.label) {
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case 0:
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if (!supportsSubtleCrypto(subtle))
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return [2 /*return*/, false];
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_b.label = 1;
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case 1:
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_b.trys.push([1, 4, , 5]);
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return [4 /*yield*/, subtle.generateKey({ name: "AES-GCM", length: 128 }, false, ["encrypt"])];
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case 2:
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key = _b.sent();
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return [4 /*yield*/, subtle.encrypt({
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name: "AES-GCM",
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iv: new Uint8Array(Array(12)),
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additionalData: new Uint8Array(Array(16)),
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tagLength: 128
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}, key, new Uint8Array(0))];
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case 3:
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zeroByteAuthTag = _b.sent();
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return [2 /*return*/, zeroByteAuthTag.byteLength === 16];
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case 4:
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_a = _b.sent();
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return [2 /*return*/, false];
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case 5: return [2 /*return*/];
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}
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});
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});
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}
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exports.supportsZeroByteGCM = supportsZeroByteGCM;
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