.\" $OpenBSD: ENGINE_unregister_RSA.3,v 1.3 2018/04/18 03:39:22 schwarze Exp $
.\" content checked up to:
.\" OpenSSL ENGINE_add 1f13ad31 Dec 25 17:50:39 2017 +0800
.\"
.\" Copyright (c) 2018 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\"
.Dd $Mdocdate: April 18 2018 $
.Dt ENGINE_UNREGISTER_RSA 3
.Os
.Sh NAME
.Nm ENGINE_unregister_RSA ,
.Nm ENGINE_unregister_DSA ,
.Nm ENGINE_unregister_ECDH ,
.Nm ENGINE_unregister_ECDSA ,
.Nm ENGINE_unregister_DH ,
.Nm ENGINE_unregister_RAND ,
.Nm ENGINE_unregister_STORE ,
.Nm ENGINE_unregister_ciphers ,
.Nm ENGINE_unregister_digests
.Nd revoke the registration of an ENGINE object
.Sh SYNOPSIS
.In openssl/engine.h
.Ft void
.Fo ENGINE_unregister_RSA
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_DSA
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_ECDH
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_ECDSA
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_DH
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_RAND
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_STORE
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_ciphers
.Fa "ENGINE *e"
.Fc
.Ft void
.Fo ENGINE_unregister_digests
.Fa "ENGINE *e"
.Fc
.Sh DESCRIPTION
These functions remove
.Fa e
from the list of
.Vt ENGINE
objects that were previously registered for the respective algorithm
with the functions described in
.Xr ENGINE_register_RSA 3 .
.Pp
If
.Fa e
is currently used as the default engine for the algorithm
as described in the
.Fn ENGINE_set_default 3
and
.Fn ENGINE_get_default_RSA 3
manual pages,
.Xr ENGINE_finish 3
is also called.
.Pp
.Fn ENGINE_unregister_ciphers
and
.Fn ENGINE_unregister_digests
unregister
.Fa e
for all ciphers or digests, respectively.
.Sh SEE ALSO
.Xr ENGINE_cleanup 3 ,
.Xr ENGINE_finish 3 ,
.Xr ENGINE_new 3 ,
.Xr ENGINE_register_RSA 3 ,
.Xr ENGINE_set_default 3
.Sh HISTORY
.Fn ENGINE_unregister_RSA ,
.Fn ENGINE_unregister_DSA ,
.Fn ENGINE_unregister_DH ,
.Fn ENGINE_unregister_RAND ,
.Fn ENGINE_unregister_ciphers ,
and
.Fn ENGINE_unregister_digests
first appeared in OpenSSL 0.9.7 and have been available since
.Ox 3.2 .
.Pp
.Fn ENGINE_unregister_ECDH ,
.Fn ENGINE_unregister_ECDSA ,
and
.Fn ENGINE_unregister_STORE
first appeared in OpenSSL 0.9.8 and have been available since
.Ox 4.5 .