[#OPENSSL_init_ssl]
= OPENSSL_init_ssl
:mrdocs:

Explicitly initialise libssl and libcrypto with the given options and settings.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OPENSSL_init_ssl(
    uint64_t opts,
    xref:OPENSSL_INIT_SETTINGS.adoc[OPENSSL_INIT_SETTINGS] const* settings);
----

== Description

Automatic init usually makes this unnecessary; call it before other OpenSSL APIs when non‐default initialisation is required.

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *opts*
| Bitwise OR of OPENSSL_INIT_* flags (libcrypto options plus OPENSSL_INIT_LOAD_SSL_STRINGS / OPENSSL_INIT_NO_LOAD_SSL_STRINGS).
| *settings*
| Optional init settings (see OPENSSL_init_crypto), or NULL.
|===


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