OPENSSL_load_builtin_modules.3ossl - Man Page

add standard configuration modules


 #include <openssl/conf.h>

 void OPENSSL_load_builtin_modules(void);
 void ASN1_add_oid_module(void);
 void ENGINE_add_conf_module(void);


The function OPENSSL_load_builtin_modules() adds all the standard OpenSSL configuration modules to the internal list. They can then be used by the OpenSSL configuration code.

ASN1_add_oid_module() adds just the ASN1 OBJECT module.

ENGINE_add_conf_module() adds just the ENGINE configuration module.


If the simple configuration function OPENSSL_config() is called then OPENSSL_load_builtin_modules() is called automatically.

Applications which use the configuration functions directly will need to call OPENSSL_load_builtin_modules() themselves before any other configuration code.

Applications should call OPENSSL_load_builtin_modules() to load all configuration modules instead of adding modules selectively: otherwise functionality may be missing from the application if an when new modules are added.

Return Values

None of the functions return a value.

See Also

config(5), OPENSSL_config(3)


ENGINE_add_conf_module() was deprecated in OpenSSL 3.0.

Referenced By

The man pages ASN1_add_oid_module.3ossl(3) and ENGINE_add_conf_module.3ossl(3) are aliases of OPENSSL_load_builtin_modules.3ossl(3).

2023-08-31 3.1.1 OpenSSL