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SSL_CTX_use_serverinfo_file.3
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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". .PP If more than one certificate (\s-1RSA/DSA\s0) is installed using \&\fISSL_CTX_use_certificate()\fR, the serverinfo extension will be loaded into the last certificate installed. If e.g. the last item was a \s-1RSA\s0 certificate, the loaded serverinfo extension data will be loaded for that certificate. To use the serverinfo extension for multiple certificates, \&\fISSL_CTX_use_serverinfo()\fR needs to be called multiple times, once \fBafter\fR each time a certificate is loaded. .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"