f certificates must not contain duplicates. The optional <i>crls</i> parameter may be used to provide extra CRLs. Also the list of CRLs must not contain duplicates. The optional parameters library context <i>libctx</i> and property query <i>propq</i> are used when retrieving algorithms from providers.</p>

<p>CMS_get0_signers() retrieves the signing certificate(s) from <i>cms</i>; it may only be called after a successful CMS_verify() or CMS_SignedData_verify() operation.</p>

<h1 id="VERIFY-PROCESS">VERIFY 