[#CMS_compress]
= CMS_compress
:mrdocs:

Create a CMS CompressedData ContentInfo from content read from a BIO.

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CMS_ContentInfo.adoc[CMS_ContentInfo]*
CMS_compress(
    xref:BIO.adoc[BIO]* in,
    int comp_nid,
    unsigned int flags);
----

== Return Value

New CMS_ContentInfo on success, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *in*
| Content to compress (ignored for reading when CMS_STREAM is set).
| *comp_nid*
| Compression algorithm NID, or NID_undef for the default (zlib).
| *flags*
| Optional CMS flags such as CMS_TEXT, CMS_BINARY, CMS_STREAM, or CMS_DETACHED.
|===


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