xref: /openbsd/lib/libssl/man/SSL_set_session.3 (revision f6aab3d8)
1.\"	$OpenBSD: SSL_set_session.3,v 1.4 2018/03/27 17:35:50 schwarze Exp $
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51.Dd $Mdocdate: March 27 2018 $
52.Dt SSL_SET_SESSION 3
53.Os
54.Sh NAME
55.Nm SSL_set_session
56.Nd set a TLS/SSL session to be used during TLS/SSL connect
57.Sh SYNOPSIS
58.In openssl/ssl.h
59.Ft int
60.Fn SSL_set_session "SSL *ssl" "SSL_SESSION *session"
61.Sh DESCRIPTION
62.Fn SSL_set_session
63sets
64.Fa session
65to be used when the TLS/SSL connection is to be established.
66.Fn SSL_set_session
67is only useful for TLS/SSL clients.
68When the session is set, the reference count of
69.Fa session
70is incremented
71by 1.
72If the session is not reused, the reference count is decremented again during
73.Fn SSL_connect .
74Whether the session was reused can be queried with the
75.Xr SSL_session_reused 3
76call.
77.Pp
78If there is already a session set inside
79.Fa ssl
80(because it was set with
81.Fn SSL_set_session
82before or because the same
83.Fa ssl
84was already used for a connection),
85.Xr SSL_SESSION_free 3
86will be called for that session.
87.Pp
88.Vt SSL_SESSION
89objects keep internal link information about the session cache list when being
90inserted into one
91.Vt SSL_CTX
92object's session cache.
93One
94.Vt SSL_SESSION
95object, regardless of its reference count, must therefore only be used with one
96.Vt SSL_CTX
97object (and the
98.Vt SSL
99objects created from this
100.Vt SSL_CTX
101object).
102.Sh RETURN VALUES
103The following return values can occur:
104.Bl -tag -width Ds
105.It 0
106The operation failed; check the error stack to find out the reason.
107.It 1
108The operation succeeded.
109.El
110.Sh SEE ALSO
111.Xr ssl 3 ,
112.Xr SSL_CTX_set_session_cache_mode 3 ,
113.Xr SSL_get_session 3 ,
114.Xr SSL_SESSION_free 3 ,
115.Xr SSL_session_reused 3
116.Sh HISTORY
117.Fn SSL_set_session
118first appeared in SSLeay 0.5.2 and has been available since
119.Ox 2.4 .
120