entity-locker-sdk/src/utils.js

Node.js SDK for DigiLocker's Entity Locker integration

const crypto = require('crypto');

exports.base64url = (input) => {
  return input.toString('base64')
    .replace(/=/g, '')
    .replace(/\+/g, '-')
    .replace(/\//g, '_');
};

exports.hmacSHA256 = (data, key) => {
  const hmac = crypto.createHmac('sha256', key);
  hmac.update(data);
  return hmac.digest('base64');
};