[#SSL_CTX_set_srp_username_callback]
= SSL_CTX_set_srp_username_callback
:mrdocs:

Set the server callback invoked when an SRP username appears in ClientHello (deprecated).

== Synopsis

Declared in `<openssl/ssl.h>`

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

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

1 on success, or a non‐positive value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Server SSL context that invokes `cb` to configure SRP parameters via SSL_set_srp_server_param.
| *cb*
| Callback receiving the SSL, a writable alert/error code, and the argument from SSL_CTX_set_srp_cb_arg.
|===


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