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1.\" $OpenBSD: SSL_CTX_set_ssl_version.3,v 1.5 2021/05/11 19:48:56 tb Exp $
2.\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
3.\"
4.\" This file was written by Lutz Jaenicke <jaenicke@openssl.org>.
5.\" Copyright (c) 2000, 2001, 2005 The OpenSSL Project. All rights reserved.
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51.Dd $Mdocdate: May 11 2021 $
52.Dt SSL_CTX_SET_SSL_VERSION 3
53.Os
54.Sh NAME
55.Nm SSL_CTX_set_ssl_version ,
56.Nm SSL_set_ssl_method ,
57.Nm SSL_CTX_get_ssl_method ,
58.Nm SSL_get_ssl_method
59.Nd choose a new TLS/SSL method
60.Sh SYNOPSIS
61.In openssl/ssl.h
62.Ft int
63.Fn SSL_CTX_set_ssl_version "SSL_CTX *ctx" "const SSL_METHOD *method"
64.Ft int
65.Fn SSL_set_ssl_method "SSL *s" "const SSL_METHOD *method"
66.Ft const SSL_METHOD *
67.Fn SSL_CTX_get_ssl_method "SSL_CTX *ctx"
68.Ft const SSL_METHOD *
69.Fn SSL_get_ssl_method "SSL *ssl"
70.Sh DESCRIPTION
71.Fn SSL_CTX_set_ssl_version
72sets a new default TLS/SSL
73.Fa method
74for
75.Vt SSL
76objects newly created from this
77.Fa ctx .
78.Vt SSL
79objects already created with
80.Xr SSL_new 3
81are not affected, except when
82.Xr SSL_clear 3
83is called.
84.Pp
85.Fn SSL_set_ssl_method
86sets a new TLS/SSL
87.Fa method
88for a particular
89.Vt SSL
90object
91.Fa s .
92It may be reset when
93.Xr SSL_clear 3
94is called.
95.Pp
96.Fn SSL_CTX_get_ssl_method
97and
98.Fn SSL_get_ssl_method
99return a function pointer to the TLS/SSL method set in
100.Fa ctx
101and
102.Fa ssl ,
103respectively.
104.Pp
105The available
106.Fa method
107choices are described in
108.Xr SSL_CTX_new 3 .
109.Pp
110When
111.Xr SSL_clear 3
112is called and no session is connected to an
113.Vt SSL
114object, the method of the
115.Vt SSL
116object is reset to the method currently set in the corresponding
117.Vt SSL_CTX
118object.
119.Sh RETURN VALUES
120The following return values can occur for
121.Fn SSL_CTX_set_ssl_version
122and
123.Fn SSL_set_ssl_method :
124.Bl -tag -width Ds
125.It 0
126The new choice failed.
127Check the error stack to find out the reason.
128.It 1
129The operation succeeded.
130.El
131.Sh SEE ALSO
132.Xr ssl 3 ,
133.Xr SSL_clear 3 ,
134.Xr SSL_CTX_new 3 ,
135.Xr SSL_new 3 ,
136.Xr SSL_set_connect_state 3
137.Sh HISTORY
138.Fn SSL_CTX_set_ssl_version ,
139.Fn SSL_set_ssl_method ,
140and
141.Fn SSL_get_ssl_method
142first appeared in SSLeay 0.8.0 and have been available since
143.Ox 2.4 .
144.Fn SSL_CTX_get_ssl_method
145first appeared in OpenSSL 1.1.0 and has been available since
146.Ox 7.0 .
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