[#OSSL_CMP_MSG_http_perform]
= OSSL&lowbar;CMP&lowbar;MSG&lowbar;http&lowbar;perform
:mrdocs:

Send a CMP request over HTTP(S) to the server configured in `ctx` and return the response&period;

== Synopsis

Declared in `&lt;openssl&sol;cmp&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:OSSL_CMP_MSG.adoc[OSSL&lowbar;CMP&lowbar;MSG]*
OSSL&lowbar;CMP&lowbar;MSG&lowbar;http&lowbar;perform(
    xref:OSSL_CMP_CTX.adoc[OSSL&lowbar;CMP&lowbar;CTX]* ctx,
    xref:OSSL_CMP_MSG.adoc[OSSL&lowbar;CMP&lowbar;MSG] const* req);
----

== Return Value

Server response message on success, or NULL on error&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| CMP context with server address, path, and transfer options&period;
| *req*
| CMP request message to send&period;
|===


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