title: X509 signatureValue size
body: <p>The question is why <code>signatureValue</code> is so big if it is based on hashes?
  Suppose Signature Algorithm is <code>sha256RSA</code>.
  Shouldn't it be smaller according following steps:</p>
  
  <ol>
  <li>Calculate SHA256 hash from <code>tbsCertificate</code>. Output => 256 bits.</li>
  <li>Sign 256 bits hash with RSA private key. Output => 256 bits? </li>
  </ol>
  
  <p>But if you see the size of the <code>signatureValue</code>, it might have 2048, 4096, [bigger?] bits.</p>