cose-kit
Version:
**DEPRECATED:** Use [@auth0/cose](https://www.npmjs.com/package/@auth0/cose).
117 lines (116 loc) • 5.26 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Mac0 = void 0;
const verify_js_1 = __importDefault(require("#runtime/verify.js"));
const sign_js_1 = __importDefault(require("#runtime/sign.js"));
const cbor_js_1 = require("../cbor.js");
const COSEBase_js_1 = require("./COSEBase.js");
const headers_js_1 = require("../headers.js");
const buffer_utils_js_1 = require("../lib/buffer_utils.js");
const errors = __importStar(require("../util/errors.js"));
const validate_algorithms_js_1 = __importDefault(require("../lib/validate_algorithms.js"));
const decode_js_1 = require("./decode.js");
class Mac0 extends COSEBase_js_1.COSEBase {
constructor(protectedHeaders, unprotectedHeaders, payload, tag) {
super(protectedHeaders, unprotectedHeaders);
this.payload = payload;
this.tag = tag;
}
static createMAC0(protectedHeaders, applicationHeaders, payload) {
return cbor_js_1.encoder.encode([
'MAC0',
protectedHeaders,
applicationHeaders,
payload,
]);
}
getContentForEncoding() {
return [
this.encodedProtectedHeaders,
this.unprotectedHeaders,
this.payload,
this.tag,
];
}
async verify(key, options) {
var _a, _b;
const mac0Structure = Mac0.createMAC0(this.encodedProtectedHeaders || new Uint8Array(), (_a = options === null || options === void 0 ? void 0 : options.externalAAD) !== null && _a !== void 0 ? _a : new Uint8Array(), (_b = options === null || options === void 0 ? void 0 : options.detachedPayload) !== null && _b !== void 0 ? _b : this.payload);
if (!this.alg || !this.algName || !headers_js_1.MacAlgorithmNames.has(this.alg)) {
throw new errors.COSEInvalid(`Unsupported MAC algorithm ${this.alg}`);
}
const algorithms = options && (0, validate_algorithms_js_1.default)('algorithms', options.algorithms);
if (algorithms && !algorithms.has(this.alg)) {
throw new errors.COSEAlgNotAllowed(`[${headers_js_1.Headers.Algorithm}] (algorithm) Header Parameter not allowed`);
}
const isValid = await (0, verify_js_1.default)(this.algName, key, this.tag, mac0Structure);
if (!isValid) {
throw new errors.COSESignatureVerificationFailed('MAC0 signature verification failed');
}
}
get alg() {
return this.protectedHeaders.get(headers_js_1.Headers.Algorithm) ||
this.unprotectedHeaders.get(headers_js_1.Headers.Algorithm);
}
get algName() {
return this.alg ? headers_js_1.MacAlgorithmNames.get(this.alg) : undefined;
}
hasSupportedAlg() {
return !!this.algName;
}
areEqual(mac0) {
return (0, buffer_utils_js_1.areEqual)(this.tag, mac0.tag);
}
static async create(protectedHeaders, unprotectedHeaders, payload, key) {
const wProtectedHeaders = headers_js_1.MacProtectedHeaders.wrap(protectedHeaders);
const alg = headers_js_1.MacAlgorithmNames.get(wProtectedHeaders.get(headers_js_1.Headers.Algorithm));
const encodedProtectedHeaders = cbor_js_1.encoder.encode(wProtectedHeaders.esMap);
const wUnprotectedHeaders = headers_js_1.UnprotectedHeaders.wrap(unprotectedHeaders);
const toBeSigned = Mac0.createMAC0(encodedProtectedHeaders, new Uint8Array(), payload);
if (!alg) {
throw new Error(`The [${headers_js_1.Headers.Algorithm}] (Algorithm) header must be set.`);
}
const tag = await (0, sign_js_1.default)(alg, key, toBeSigned);
return new Mac0(encodedProtectedHeaders, wUnprotectedHeaders.esMap, payload, tag);
}
static decode(cose) {
return (0, decode_js_1.decode)(cose, Mac0);
}
}
exports.Mac0 = Mac0;
Mac0.tag = 17;
(0, cbor_js_1.addExtension)({
Class: Mac0,
tag: Mac0.tag,
encode(instance, encodeFn) {
return encodeFn(instance.getContentForEncoding());
},
decode: (data) => {
return new Mac0(data[0], data[1], data[2], data[3]);
}
});