@strongnguyen/oidc-provider/lib/helpers/pkce_format.js

OAuth 2.0 Authorization Server implementation for Node.js with OpenID Connect

const { InvalidRequest } = require('./errors');

const check = /[^\w.\-~]/;

module.exports = (input, param) => {
  if (input.length < 43) {
    throw new InvalidRequest(`${param} must be a string with a minimum length of 43 characters`);
  }

  if (input.length > 128) {
    throw new InvalidRequest(`${param} must be a string with a maximum length of 128 characters`);
  }

  if (check.test(input)) {
    throw new InvalidRequest(`${param} contains invalid characters`);
  }
};