validify-string/lib/utils/generateJWT.js

Ensure accurate and secure input with our reliable string validation library.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeJWT = exports.generateJWT = void 0;
var crypto = require("crypto");
function base64urlEncode(data) {
    return Buffer.from(data).toString('base64')
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=/g, '');
}
function base64urlDecode(data) {
    var buffer = Buffer.from(data, 'base64');
    return buffer.toString();
}
// Generate a JWT token with the given payload, secret and expiration time using HMAC SHA256 algorithm
var generateJWT = function (payload, secret, expiresInSec) {
    if (expiresInSec === void 0) { expiresInSec = 3600; }
    var header = {
        alg: 'HS256',
        typ: 'JWT'
    };
    var encodedHeader = base64urlEncode(JSON.stringify(header));
    var encodedPayload = base64urlEncode(JSON.stringify(payload));
    var signatureInput = "".concat(encodedHeader, ".").concat(encodedPayload);
    var signature = crypto.createHmac('sha256', secret).update(signatureInput).digest('base64');
    var token = "".concat(encodedHeader, ".").concat(encodedPayload, ".").concat(base64urlEncode(signature));
    return token;
};
exports.generateJWT = generateJWT;
// Decode the given JWT token
var decodeJWT = function (token) {
    var parts = token.split('.');
    if (parts.length !== 3) {
        console.error('Invalid JWT format');
        return null;
    }
    var encodedHeader = parts[0], encodedPayload = parts[1];
    var header = JSON.parse(base64urlDecode(encodedHeader));
    var payload = JSON.parse(base64urlDecode(encodedPayload));
    return {
        header: header,
        payload: payload
    };
};
exports.decodeJWT = decodeJWT;