title: How to set zero padding to EVP_CIPHER?
body: <p>Is possible to set <a href="http://en.wikipedia.org/wiki/Padding_%28cryptography%29#Zero_padding" rel="nofollow">Zero Padding</a> when using EVP_CIPHER.</p>
  
  <p>I know that the default padding for <code>EVP_EncryptInit_ex</code> is enabled and it uses PKCS padding.</p>
  
  <p>And with <code>EVP_CIPHER_CTX_set_padding</code> you can only enable and disable the padding. </p>