1SSL_CTX_use_serverinfo(3)           OpenSSL          SSL_CTX_use_serverinfo(3)
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NAME

6       SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - use serverinfo
7       extension
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SYNOPSIS

10        #include <openssl/ssl.h>
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12        int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
13                                   size_t serverinfo_length);
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15        int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file);
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DESCRIPTION

18       These functions load "serverinfo" TLS ServerHello Extensions into the
19       SSL_CTX.  A "serverinfo" extension is returned in response to an empty
20       ClientHello Extension.
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22       SSL_CTX_use_serverinfo() loads one or more serverinfo extensions from a
23       byte array into ctx.  The extensions must be concatenated into a
24       sequence of bytes.  Each extension must consist of a 2-byte Extension
25       Type, a 2-byte length, and then length bytes of extension_data.
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27       SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions
28       from file into ctx.  The extensions must be in PEM format.  Each
29       extension must consist of a 2-byte Extension Type, a 2-byte length, and
30       then length bytes of extension_data.  Each PEM extension name must
31       begin with the phrase "BEGIN SERVERINFO FOR ".
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33       If more than one certificate (RSA/DSA) is installed using
34       SSL_CTX_use_certificate(), the serverinfo extension will be loaded into
35       the last certificate installed.  If e.g. the last item was a RSA
36       certificate, the loaded serverinfo extension data will be loaded for
37       that certificate.  To use the serverinfo extension for multiple
38       certificates, SSL_CTX_use_serverinfo() needs to be called multiple
39       times, once after each time a certificate is loaded.
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NOTES

RETURN VALUES
43       On success, the functions return 1.  On failure, the functions return
44       0.  Check out the error stack to find out the reason.
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SEE ALSO
HISTORY
481.0.2o                            2020-08-01         SSL_CTX_use_serverinfo(3)



        

    


            
        

        

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