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.\" ========================================================================
.\"
.IX Title "SSL_SESSION_GET0_ID_CONTEXT 3SSL"
.TH SSL_SESSION_GET0_ID_CONTEXT 3SSL "2021-03-22" "1.1.1d" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
SSL_SESSION_get0_id_context, SSL_SESSION_set1_id_context \&\- get and set the SSL ID context associated with a session
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
\&                                                  unsigned int *len)
\& int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
\&                                unsigned int sid_ctx_len);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
See \fBSSL_CTX_set_session_id_context\fR\|(3) for further details on session \s-1ID\s0
contexts.
.PP
\&\fBSSL_SESSION_get0_id_context()\fR returns the \s-1ID\s0 context associated with
the \s-1SSL/TLS\s0 session \fBs\fR. The length of the \s-1ID\s0 context is written to
\&\fB*len\fR if \fBlen\fR is not \s-1NULL.\s0
.PP
The value returned is a pointer to an object maintained within \fBs\fR and
should not be released.
.PP
\&\fBSSL_SESSION_set1_id_context()\fR takes a copy of the provided \s-1ID\s0 context given in
\&\fBsid_ctx\fR and associates it with the session \fBs\fR. The length of the \s-1ID\s0 context
is given by \fBsid_ctx_len\fR which must not exceed \s-1SSL_MAX_SID_CTX_LENGTH\s0 bytes.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBSSL_SESSION_set1_id_context()\fR returns 1 on success or 0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(7),
\&\fBSSL_set_session_id_context\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBSSL_SESSION_get0_id_context()\fR function was added in OpenSSL 1.1.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.