[#SSL_CTX_use_cert_and_key]
= SSL_CTX_use_cert_and_key
:mrdocs:

Assign a certificate, private key, and optional chain onto an SSL context.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_CTX_use_cert_and_key(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    xref:X509.adoc[X509]* x509,
    xref:EVP_PKEY.adoc[EVP_PKEY]* privatekey,
    xref:stack_st_X509.adoc[stack_st_X509]* chain,
    int override);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context that receives the credentials.
| *x509*
| End‐entity X.509 certificate (reference count incremented on success).
| *privatekey*
| Matching private key, or NULL to use `x509's` public key (e.g. hardware ENGINE).
| *chain*
| Optional intermediate certificate chain, or NULL.
| *override*
| If 0, set only when cert/key/chain were all previously unset; if non‐zero, always replace.
|===


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