@yash112/jwt-library/dist/jwt.js

Encode, Decode & Validate JSON Web Token (JWTs)

"use strict";
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.sign = sign;
exports.verify = verify;
const crypto = __importStar(require("crypto"));
const base64url_1 = __importDefault(require("base64url"));
const ALGORITHM = 'HS256';
function base64urlEncode(str) {
    return (0, base64url_1.default)(str);
}
function base64urlDecode(str) {
    return base64url_1.default.decode(str);
}
function sign(payload, secret, options) {
    const header = {
        alg: ALGORITHM,
        typ: 'JWT'
    };
    const timestamp = Math.floor(Date.now() / 1000);
    if (options.expiresIn) {
        payload.exp = timestamp + options.expiresIn;
    }
    const headerStr = base64urlEncode(JSON.stringify(header));
    const payloadStr = base64urlEncode(JSON.stringify(payload));
    const signature = base64urlEncode(crypto.createHmac('sha256', secret).update(`${headerStr}.${payloadStr}`).digest('base64'));
    return `${headerStr}.${payloadStr}.${signature}`;
}
function verify(token, secret) {
    const [headerB64, payloadB64, signature] = token.split('.');
    const header = JSON.parse(base64urlDecode(headerB64));
    if (header.alg !== ALGORITHM) {
        throw new Error('Invalid algorithm');
    }
    const expectedSignature = base64urlEncode(crypto.createHmac('sha256', secret).update(`${headerB64}.${payloadB64}`).digest('base64'));
    if (signature !== expectedSignature) {
        throw new Error('Invalid signature');
    }
    const payload = JSON.parse(base64urlDecode(payloadB64));
    if (payload.exp && payload.exp < Math.floor(Date.now() / 1000)) {
        throw new Error('Token expired');
    }
    return payload;
}