title: google-cloud-kms PKCS7 Cryptographic Message Syntax
body: <p>Has anyone implemented Cryptographic Message Syntax using Google's HSM and KMS service?</p>
  
  <p>It is difficult to tell if this functionality is built into the <a href="https://github.com/google/tink" rel="nofollow noreferrer">Tink</a>library or not. </p>
  
  <p>There is no Google Engine for OpenSSL or BoringSSL (would love to be corrected if not the case) and as the engine needs to be written in clang I imagine it is rather difficult to include the tink.so library?</p>
  
  <p>If anyone has any information on performing these types of operations on Google's KMS service It would be greatly appreciated. </p>