[#ENGINE_SSL_CLIENT_CERT_PTR]
= ENGINE_SSL_CLIENT_CERT_PTR
:mrdocs:

ENGINE callback that supplies a client certificate and key for an SSL connection.

== Synopsis

Declared in `<openssl/engine.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int(* ENGINE_SSL_CLIENT_CERT_PTR)(xref:ENGINE.adoc[ENGINE]*, xref:SSL.adoc[SSL]*, xref:stack_st_X509_NAME.adoc[stack_st_X509_NAME]*, xref:X509.adoc[X509]**, xref:EVP_PKEY.adoc[EVP_PKEY]**, xref:stack_st_X509.adoc[stack_st_X509]**, xref:UI_METHOD.adoc[UI_METHOD]*, void*);
----

== Return Value

1 on success, 0 on failure, or a negative value on fatal error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ssl*
| SSL connection requesting a client certificate.
| *ca_dn*
| Acceptable CA distinguished names from the server, or NULL.
| *pcert*
| Receives the selected client certificate.
| *pkey*
| Receives the matching private key.
| *pother*
| Optional chain certificates to send, or NULL if unused.
| *ui_method*
| UI method for interactive PIN/passphrase prompts, or NULL.
| *callback_data*
| User pointer associated with the ENGINE load operation.
|===


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