/usr/man2/cat.3/SSL_CTX_use_serverinfo.3.Z(/usr/man2/cat.3/SSL_CTX_use_serverinfo.3.Z)
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 exten-
sion 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 cer-
tificate, the loaded serverinfo extension data will be loaded for that
certificate. To use the serverinfo extension for multiple certifi-
cates, 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
1.0.2t 2019-09-10 SSL_CTX_use_serverinfo(3)
See also SSL_CTX_use_serverinfo_file(3)
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