.\" $OpenBSD: SSL_SESSION_set1_id_context.3,v 1.4 2018/03/24 00:55:37 schwarze Exp $
.\" full merge up to:
.\" OpenSSL SSL_SESSION_get0_id_context b31db505 Mar 24 16:01:50 2017
.\"
.\" This file was written by Matt Caswell <matt@openssl.org>
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.Dd $Mdocdate: March 24 2018 $
.Dt SSL_SESSION_SET1_ID_CONTEXT 3
.Os
.Sh NAME
.Nm SSL_SESSION_get0_id_context ,
.Nm SSL_SESSION_set1_id_context
.Nd get and set the SSL ID context associated with a session
.Sh SYNOPSIS
.In openssl/ssl.h
.Ft const unsigned char *
.Fo SSL_SESSION_get0_id_context
.Fa "const SSL_SESSION *s"
.Fa "unsigned int *len"
.Fc
.Ft int
.Fo SSL_SESSION_set1_id_context
.Fa "SSL_SESSION *s"
.Fa "const unsigned char *sid_ctx"
.Fa "unsigned int sid_ctx_len"
.Fc
.Sh DESCRIPTION
.Fn SSL_SESSION_get0_id_context
returns the ID context associated with
.Fa s .
The length of the ID context in bytes is written to
.Pf * Fa len
if
.Fa len
is not
.Dv NULL .
.Pp
.Fn SSL_SESSION_set1_id_context
takes a copy of the provided ID context given in
.Fa sid_ctx
and associates it with the session
.Fa s .
The length of the ID context is given by
.Fa sid_ctx_len
which must not exceed
.Dv SSL_MAX_SID_CTX_LENGTH
bytes.
.Sh RETURN VALUES
.Fn SSL_SESSION_get0_id_context
returns an internal pointer to an object maintained within
.Fa s
that should not be freed by the caller.
.Pp
.Fn SSL_SESSION_set1_id_context
returns 1 on success or 0 on error.
.Sh SEE ALSO
.Xr ssl 3 ,
.Xr SSL_CTX_set_session_id_context 3 ,
.Xr SSL_get_session 3 ,
.Xr SSL_SESSION_new 3
.Sh HISTORY
.Fn SSL_SESSION_set1_id_context
first appeared in OpenSSL 1.0.1 and has been available since
.Ox 5.3 .
.Pp
.Fn SSL_SESSION_get0_id_context
first appeared in OpenSSL 1.1.0 and has been available since
.Ox 6.3 .