[#SSL_CTX_set_client_cert_cb]
= SSL_CTX_set_client_cert_cb
:mrdocs:

Install a callback that supplies a client certificate during handshake.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
SSL_CTX_set_client_cert_cb(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    int(* client_cert_cb)(xref:SSL.adoc[SSL]*, xref:X509.adoc[X509]**, xref:EVP_PKEY.adoc[EVP_PKEY]**));
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context whose connections inherit `client_cert_cb.`
| *client_cert_cb*
| Callback that sets *`x509` and *`pkey,` or NULL to clear.
|===


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