[#SSL_CTX_set_psk_use_session_callback]
= SSL_CTX_set_psk_use_session_callback
:mrdocs:

Set the PSK use‐session callback for client SSL objects from a context.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
SSL_CTX_set_psk_use_session_callback(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    xref:SSL_psk_use_session_cb_func.adoc[SSL_psk_use_session_cb_func] cb);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context whose default PSK use‐session callback is set.
| *cb*
| Callback that supplies identity and SSL_SESSION for the PSK, or NULL to clear.
|===


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