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.\" $OpenBSD: OPENSSL_load_builtin_modules.3,v 1.4 2016/11/28 15:08:58 schwarze Exp $
.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
.\"
.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
.\" Copyright (c) 2004, 2013 The OpenSSL Project. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\"
.\" 3. All advertising materials mentioning features or use of this
.\" software must display the following acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
.\"
.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
.\" endorse or promote products derived from this software without
.\" prior written permission. For written permission, please contact
.\" openssl-core@openssl.org.
.\"
.\" 5. Products derived from this software may not be called "OpenSSL"
.\" nor may "OpenSSL" appear in their names without prior written
.\" permission of the OpenSSL Project.
.\"
.\" 6. Redistributions of any form whatsoever must retain the following
.\" acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)"
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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.\"
.Dd $Mdocdate: November 28 2016 $
.Dt OPENSSL_LOAD_BUILTIN_MODULES 3
.Os
.Sh NAME
.Nm OPENSSL_load_builtin_modules ,
.Nm ASN1_add_oid_module ,
.Nm ENGINE_add_conf_module
.Nd add standard configuration modules
.Sh SYNOPSIS
.In openssl/conf.h
.Ft void
.Fn OPENSSL_load_builtin_modules void
.Ft void
.Fn ASN1_add_oid_module void
.Ft void
.Fn ENGINE_add_conf_module void
.Sh DESCRIPTION
The function
.Fn 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.
.Pp
.Fn ASN1_add_oid_module
adds just the ASN.1 OBJECT module.
.Pp
.Fn ENGINE_add_conf_module
adds just the ENGINE configuration module.
.Pp
If the simple configuration function
.Xr OPENSSL_config 3
is called then
.Fn OPENSSL_load_builtin_modules
is called automatically.
.Pp
Applications which use the configuration functions directly will need to
call
.Fn OPENSSL_load_builtin_modules
themselves
.Em before
any other configuration code.
.Pp
Applications should call
.Fn OPENSSL_load_builtin_modules
to load all configuration modules instead of adding modules selectively:
otherwise functionality may be missing from the application when
new modules are added.
.Sh SEE ALSO
.Xr OPENSSL_config 3
.Sh HISTORY
These functions first appeared in OpenSSL 0.9.7.
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