[#SSL_compress_certs]
= SSL_compress_certs
:mrdocs:

Pre‐compress all certificates configured on a server SSL connection with algorithm `alg.`

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_compress_certs(
    xref:SSL.adoc[SSL]* ssl,
    int alg);
----

== Return Value

1 on success, or 0 on failure (including when `ssl` is a client connection).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ssl*
| Server SSL connection whose certificates are compressed.
| *alg*
| Compression algorithm identifier (for example TLSEXT_comp_cert_zlib), or 0 to use each algorithm in the preference list.
|===


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