digital-covid-certificate-lib
Version:
A library to parse and verify Digital Covid Certificates (DCC)
74 lines • 3 kB
JavaScript
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CoseKeys = exports.DccCose = void 0;
const cbor = __importStar(require("cbor-web"));
const pvtsutils_1 = require("pvtsutils");
const CoseKty_1 = require("../data/CoseKty");
class DccCose {
constructor(cose) {
this.cose = cose;
this.signedHeaderAsJson = {};
this.signedHeader = cose.value[exports.CoseKeys.CoseSignedHeader];
this.unsignedHeader = cose.value[exports.CoseKeys.CoseUnsignedHeader];
this.payload = cose.value[exports.CoseKeys.CosePayload];
this.signature = cose.value[exports.CoseKeys.CoseSignature];
this.payloadAsJson = cbor.decode(this.payload);
this.decodeHeader();
}
getContentToSign() {
return cbor.encode(["Signature1", this.signedHeader, Buffer.from(''), this.payload]);
// importnat the unsigned header field must be a empty buffer object
// Uint8Array yields the wrong Byte!!! by the cbor encoder!
// This might be a edge case (bug??) from the cbor lib as it works fine with signedHeader and payload UnitArrays
}
getPayloadAsJson() {
return this.payloadAsJson;
}
getSignedHeaderAsJson() {
return this.signedHeaderAsJson;
}
decodeHeader() {
// https://www.iana.org/assignments/cose/cose.xhtml#header-parameters
const headerKeys = { kid: 4, kty: 1 };
const header = cbor.decode(this.signedHeader);
if (header.get(headerKeys.kid)) {
this.signedHeaderAsJson.kid = pvtsutils_1.Convert.ToBase64(header.get(headerKeys.kid));
}
if (header.get(headerKeys.kty)) {
const kty = CoseKty_1.COSE_ALGORITHMS[header.get(headerKeys.kty)];
if (kty) {
this.signedHeaderAsJson.kty = kty;
}
else {
this.signedHeaderAsJson.kty = header.get(headerKeys.kty);
}
}
}
}
exports.DccCose = DccCose;
exports.CoseKeys = {
CoseSignedHeader: 0,
CoseUnsignedHeader: 1,
CosePayload: 2,
CoseSignature: 3
};
//# sourceMappingURL=DccCose.js.map