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SSL_CTX_use_serverinfo(3)           OpenSSL          SSL_CTX_use_serverinfo(3)

NAME
       SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - use serverinfo
       extension

SYNOPSIS
        #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);

DESCRIPTION
       These functions load "serverinfo" TLS ServerHello Extensions into the
       SSL_CTX.  A "serverinfo" extension is returned in response to an empty
       ClientHello Extension.

       SSL_CTX_use_serverinfo() loads one or more serverinfo extensions from a
       byte array into ctx.  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.

       SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions
       from file into ctx.  The extensions must be in PEM format.  Each
       extension must consist of a 2-byte Extension Type, a 2-byte length, and
       then length bytes of extension_data.  Each PEM extension name must
       begin with the phrase "BEGIN SERVERINFO FOR ".

       If more than one certificate (RSA/DSA) is installed using
       SSL_CTX_use_certificate(), the serverinfo extension will be loaded into
       the last certificate installed.  If e.g. the last item was a RSA
       certificate, the loaded serverinfo extension data will be loaded for
       that certificate.  To use the serverinfo extension for multiple
       certificates, SSL_CTX_use_serverinfo() needs to be called multiple
       times, once after each time a certificate is loaded.

NOTES
RETURN VALUES
       On success, the functions return 1.  On failure, the functions return
       0.  Check out the error stack to find out the reason.

SEE ALSO
HISTORY
1.0.2h                            2016-05-03         SSL_CTX_use_serverinfo(3)