1.\"	$OpenBSD: OPENSSL_load_builtin_modules.3,v 1.6 2019/06/14 13:41:31 schwarze Exp $
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51.Dd $Mdocdate: June 14 2019 $
52.Dt OPENSSL_LOAD_BUILTIN_MODULES 3
53.Os
54.Sh NAME
55.Nm OPENSSL_load_builtin_modules ,
56.Nm ASN1_add_oid_module ,
57.Nm ENGINE_add_conf_module
58.Nd add standard configuration modules
59.Sh SYNOPSIS
60.In openssl/conf.h
61.Ft void
62.Fn OPENSSL_load_builtin_modules void
63.Ft void
64.Fn ASN1_add_oid_module void
65.Ft void
66.Fn ENGINE_add_conf_module void
67.Sh DESCRIPTION
68The function
69.Fn OPENSSL_load_builtin_modules
70adds all the standard OpenSSL configuration modules to the internal
71list.
72They can then be used by the OpenSSL configuration code.
73.Pp
74.Fn ASN1_add_oid_module
75adds just the ASN.1 OBJECT module.
76.Pp
77.Fn ENGINE_add_conf_module
78adds just the ENGINE configuration module.
79.Pp
80If the simple configuration function
81.Xr OPENSSL_config 3
82is called then
83.Fn OPENSSL_load_builtin_modules
84is called automatically.
85.Pp
86Applications which use configuration functions like
87.Xr CONF_modules_load_file 3
88directly need to call
89.Fn OPENSSL_load_builtin_modules
90themselves
91.Em before
92any other configuration code.
93.Pp
94Applications should call
95.Xr OPENSSL_config 3
96or
97.Fn OPENSSL_load_builtin_modules
98to load all configuration modules instead of adding modules selectively:
99otherwise functionality may be missing from the application when
100new modules are added.
101.Sh SEE ALSO
102.Xr CONF_modules_load_file 3 ,
103.Xr OPENSSL_config 3
104.Sh HISTORY
105These functions first appeared in OpenSSL 0.9.7
106and have been available since
107.Ox 3.2 .
108