CMS_final - finalise a CMS_ContentInfo structure
int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags);
CMS_final() finalises the structure cms. Its purpose is to perform
any operations necessary on cms (digest computation for example) and
set the appropriate fields. The parameter data contains the content to
be processed. The dcont parameter contains a BIO to write content to
after processing: this is only used with detached data and will usually be set
This function will normally be called when the CMS_PARTIAL flag is used.
It should only be used when streaming is not performed because the streaming
I/O functions perform finalisation operations internally.
CMS_final() returns 1 for success or 0 for failure.
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