OPENSSL_config, OPENSSL_no_config - simple OpenSSL configuration functions
void OPENSSL_config(const char *appname);
configures OpenSSL using the standard openssl.cnf
and reads from the application section appname
. If appname
NULL then the default section, openssl_conf
, will be used. Errors are
silently ignored. Multiple calls have no effect.
disables configuration. If called before
no configuration takes place.
function is designed to be a very simple "call
it and forget it" function. It is however much
nothing. Applications which need finer control over their configuration
functionality should use the configuration functions such as
directly. This function is deprecated and its use
should be avoided. Applications should instead call CONF_modules_load()
during initialization (that is before starting any threads).
There are several reasons why calling the OpenSSL configuration routines is
advisable. For example new ENGINE functionality was added to OpenSSL 0.9.7. In
OpenSSL 0.9.7 control functions can be supported by ENGINEs, this can be used
(among other things) to load dynamic ENGINEs from shared libraries (DSOs).
However very few applications currently support the control interface and so
very few can load and use dynamic ENGINEs. Equally in future more
sophisticated ENGINEs will require certain control operations to customize
them. If an application calls OPENSSL_config()
it doesn't need to know
or care about ENGINE control operations because they can be performed by
editing a configuration file.
Applications should free up configuration at application closedown by calling
return a value.
first appeared in OpenSSL