[#SSL_CTX_set1_cert_comp_preference]
= SSL_CTX_set1_cert_comp_preference
:mrdocs:

Set the preferred TLSv1.3 certificate compression algorithms for an SSL context (RFC 8879).

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_CTX_set1_cert_comp_preference(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    int* algs,
    size_t len);
----

== Return Value

1 on success, or 0 on failure (preference list left unchanged on error).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context whose preference list is replaced.
| *algs*
| Array of TLSEXT_comp_cert_* algorithm identifiers in preference order.
| *len*
| Size of `algs` in bytes (not element count).
|===


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