openssl (3.1.3)
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VersionsSSL_CTX_USE_SERVERINFO(3ossl) OpenSSL SSL_CTX_USE_SERVERINFO(3ossl)
NAME
SSL_CTX_use_serverinfo_ex, SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - use serverinfo extension
SYNOPSIS
#include <openssl/ssl.h>
int SSL_CTX_use_serverinfo_ex(SSL_CTX *ctx, unsigned int version,
const unsigned char *serverinfo,
size_t serverinfo_length);
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 extensions into the SSL_CTX. A "serverinfo" extension is returned in
response to an empty ClientHello Extension.
SSL_CTX_use_serverinfo_ex() loads one or more serverinfo extensions from a byte array into ctx. The version
parameter specifies the format of the byte array provided in *serverinfo which is of length serverinfo_length.
If version is SSL_SERVERINFOV2 then the extensions in the array must consist of a 4-byte context, a 2-byte
Extension Type, a 2-byte length, and then length bytes of extension_data. The context and type values have the
same meaning as for SSL_CTX_add_custom_ext(3). If serverinfo is being loaded for extensions to be added to a
Certificate message, then the extension will only be added for the first certificate in the message (which is
always the end-entity certificate).
If version is SSL_SERVERINFOV1 then the extensions in the array must consist of a 2-byte Extension Type, a 2-byte
length, and then length bytes of extension_data. The type value has the same meaning as for
SSL_CTX_add_custom_ext(3). The following default context value will be used in this case:
SSL_EXT_TLS1_2_AND_BELOW_ONLY | SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_IGNORE_ON_RESUMPTION
SSL_CTX_use_serverinfo() does the same thing as SSL_CTX_use_serverinfo_ex() except that there is no version
parameter so a default version of SSL_SERVERINFOV1 is used instead.
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 be in a format as described above for SSL_CTX_use_serverinfo_ex(). Each PEM
extension name must begin with the phrase "BEGIN SERVERINFOV2 FOR " for SSL_SERVERINFOV2 data or "BEGIN
SERVERINFO FOR " for SSL_SERVERINFOV1 data.
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 an 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 via a call to SSL_CTX_use_certificate().
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
ssl(7)
COPYRIGHT
Copyright 2013-2022 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the
License. You can obtain a copy in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.1.3 2023-09-19 SSL_CTX_USE_SERVERINFO(3ossl)
NAME
SSL_CTX_use_serverinfo_ex, SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - use serverinfo extension
SYNOPSIS
#include <openssl/ssl.h>
int SSL_CTX_use_serverinfo_ex(SSL_CTX *ctx, unsigned int version,
const unsigned char *serverinfo,
size_t serverinfo_length);
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 extensions into the SSL_CTX. A "serverinfo" extension is returned in
response to an empty ClientHello Extension.
SSL_CTX_use_serverinfo_ex() loads one or more serverinfo extensions from a byte array into ctx. The version
parameter specifies the format of the byte array provided in *serverinfo which is of length serverinfo_length.
If version is SSL_SERVERINFOV2 then the extensions in the array must consist of a 4-byte context, a 2-byte
Extension Type, a 2-byte length, and then length bytes of extension_data. The context and type values have the
same meaning as for SSL_CTX_add_custom_ext(3). If serverinfo is being loaded for extensions to be added to a
Certificate message, then the extension will only be added for the first certificate in the message (which is
always the end-entity certificate).
If version is SSL_SERVERINFOV1 then the extensions in the array must consist of a 2-byte Extension Type, a 2-byte
length, and then length bytes of extension_data. The type value has the same meaning as for
SSL_CTX_add_custom_ext(3). The following default context value will be used in this case:
SSL_EXT_TLS1_2_AND_BELOW_ONLY | SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_IGNORE_ON_RESUMPTION
SSL_CTX_use_serverinfo() does the same thing as SSL_CTX_use_serverinfo_ex() except that there is no version
parameter so a default version of SSL_SERVERINFOV1 is used instead.
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 be in a format as described above for SSL_CTX_use_serverinfo_ex(). Each PEM
extension name must begin with the phrase "BEGIN SERVERINFOV2 FOR " for SSL_SERVERINFOV2 data or "BEGIN
SERVERINFO FOR " for SSL_SERVERINFOV1 data.
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 an 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 via a call to SSL_CTX_use_certificate().
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
ssl(7)
COPYRIGHT
Copyright 2013-2022 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the
License. You can obtain a copy in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.1.3 2023-09-19 SSL_CTX_USE_SERVERINFO(3ossl)