@tanu-chahal/jwt-library/dist/decode.js

Encode, Decode & Validate JSON Web Token (JWTs)

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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    if (k2 === undefined) k2 = k;
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
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var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode_jwt = decode_jwt;
const crypto = __importStar(require("crypto"));
const base64url_1 = __importDefault(require("base64url"));
function decode_jwt(secret, jwt) {
    const [header, payload, signature] = jwt.split('.');
    const expectedSignature = base64url_1.default.fromBase64(crypto.createHmac('sha256', secret).update(`${header}.${payload}`).digest('base64'));
    if (signature !== expectedSignature) {
        throw new Error('Invalid JWT signature!');
    }
    const decodedPayload = JSON.parse(base64url_1.default.decode(payload));
    if (decodedPayload.exp && Math.floor(Date.now() / 1000) >= decodedPayload.exp) {
        throw new Error('JWT expired!');
    }
    const expiresAt = decodedPayload.exp ? new Date(decodedPayload.exp * 1000) : null;
    return {
        id: decodedPayload.id,
        payload: decodedPayload,
        expires_at: expiresAt
    };
}