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.\" ========================================================================
.\"
.IX Title "SSL_CTX_use_serverinfo 3"
.TH SSL_CTX_use_serverinfo 3 "2016-03-01" "1.0.2g" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file \- use serverinfo extension
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
\&                            size_t serverinfo_length);
\&
\& int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
These functions load \*(L"serverinfo\*(R" \s-1TLS\s0 ServerHello Extensions into the \s-1SSL_CTX\s0.
A \*(L"serverinfo\*(R" extension is returned in response to an empty ClientHello
Extension.
.PP
\&\fISSL_CTX_use_serverinfo()\fR loads one or more serverinfo extensions from
a byte array into \fBctx\fR.  The extensions must be concatenated into a 
sequence of bytes.  Each extension must consist of a 2\-byte Extension Type, 
a 2\-byte length, and then length bytes of extension_data.
.PP
\&\fISSL_CTX_use_serverinfo_file()\fR loads one or more serverinfo extensions from
\&\fBfile\fR into \fBctx\fR.  The extensions must be in \s-1PEM\s0 format.  Each extension
must consist of a 2\-byte Extension Type, a 2\-byte length, and then length
bytes of extension_data.  Each \s-1PEM\s0 extension name must begin with the phrase
\&\*(L"\s-1BEGIN\s0 \s-1SERVERINFO\s0 \s-1FOR\s0 \*(R".
.SH "NOTES"
.IX Header "NOTES"
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
On success, the functions return 1.
On failure, the functions return 0.  Check out the error stack to find out
the reason.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.SH "HISTORY"
.IX Header "HISTORY"