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.\" ========================================================================
.\"
.IX Title "SSL_SESSION_get_ex_new_index 3"
.TH SSL_SESSION_get_ex_new_index 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
SSL_SESSION_get_ex_new_index, SSL_SESSION_set_ex_data, SSL_SESSION_get_ex_data \- internal application specific data functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& int SSL_SESSION_get_ex_new_index(long argl, void *argp,
\&                CRYPTO_EX_new *new_func,
\&                CRYPTO_EX_dup *dup_func,
\&                CRYPTO_EX_free *free_func);
\&
\& int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx, void *arg);
\&
\& void *SSL_SESSION_get_ex_data(const SSL_SESSION *session, int idx);
\&
\& typedef int new_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
\&                int idx, long argl, void *argp);
\& typedef void free_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
\&                int idx, long argl, void *argp);
\& typedef int dup_func(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from, void *from_d,
\&                int idx, long argl, void *argp);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Several OpenSSL structures can have application specific data attached to them.
These functions are used internally by OpenSSL to manipulate application
specific data attached to a specific structure.
.PP
\&\fBSSL_SESSION_get_ex_new_index()\fR is used to register a new index for application
specific data.
.PP
\&\fBSSL_SESSION_set_ex_data()\fR is used to store application data at \fBarg\fR for \fBidx\fR
into the \fBsession\fR object.
.PP
\&\fBSSL_SESSION_get_ex_data()\fR is used to retrieve the information for \fBidx\fR from
\&\fBsession\fR.
.PP
A detailed description for the \fB*\fB_get_ex_new_index()\fB\fR functionality
can be found in \fBRSA_get_ex_new_index\fR\|(3).
The \fB*\fB_get_ex_data()\fB\fR and \fB*\fB_set_ex_data()\fB\fR functionality is described in
\&\fBCRYPTO_set_ex_data\fR\|(3).
.SH "WARNINGS"
.IX Header "WARNINGS"
The application data is only maintained for sessions held in memory. The
application data is not included when dumping the session with
\&\fBi2d_SSL_SESSION()\fR (and all functions indirectly calling the dump functions
like \fBPEM_write_SSL_SESSION()\fR and \fBPEM_write_bio_SSL_SESSION()\fR) and can
therefore not be restored.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(3),
\&\fBRSA_get_ex_new_index\fR\|(3),
\&\fBCRYPTO_set_ex_data\fR\|(3)