const fs = require('fs');

function resolveCredential(value) {
  if (!value) {
    return value;
  }
  if (/-----BEGIN ([A-Z\s*]+)-----/.test(value)) {
    return value;
  } else if (Buffer.isBuffer(value)) {
    return value;
  } else {
    return fs.readFileSync(value);
  }
}

module.exports = resolveCredential;