title: How can I verify a pem_cert and signiture (RSA-SHA1)?
body: <p>I'm trying to check if a signature is valid, in Node.js I would use </p>
  
  <p><a href="https://nodejs.org/api/crypto.html#crypto_verify_verify_object_signature_signatureencoding" rel="nofollow noreferrer">https://nodejs.org/api/crypto.html#crypto_verify_verify_object_signature_signatureencoding</a></p>
  
  <p>I can't seem to find anything for crystal that provides this functionality?</p>