 looking up and validating certificates are not appropriate: for example an application may wish to lookup certificates in a database or perform customised verification. This can be achieved by setting and verifying the signer certificates manually using the signed data utility functions.</p>

<p>Care should be taken when modifying the default verify behaviour, for example setting <b>CMS_NO_CONTENT_VERIFY</b> will totally disable all content verification and any modified content will be considered valid. Th