title: Verify OpenSSL s/mime signature using C code
body: <p>I have C based applications ,they are signed with openssl smime. </p>
  
  <p>I am looking to validate those s/mime signature using OpenSSL programmatically using C. I have spent lot of time in searching similar scenario,but didn't get relevant page.</p>
  
  <p>I have downloaded (openssl-1.0.2a) and compiled on linux env. I have integrated compiled static library to my project as well.</p>
  
  <p>Please let me know how to proceed now for signature verification OR please guide me which API I need to call to verify s/mime signature.</p>