1SSL_CTX_CONFIG(3)                   OpenSSL                  SSL_CTX_CONFIG(3)
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NAME

6       SSL_CTX_config, SSL_config - configure SSL_CTX or SSL structure
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SYNOPSIS

9        #include <openssl/ssl.h>
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11        int SSL_CTX_config(SSL_CTX *ctx, const char *name);
12        int SSL_config(SSL *s, const char *name);
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DESCRIPTION

15       The functions SSL_CTX_config() and SSL_config() configure an SSL_CTX or
16       SSL structure using the configuration name.
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NOTES

19       By calling SSL_CTX_config() or SSL_config() an application can perform
20       many complex tasks based on the contents of the configuration file:
21       greatly simplifying application configuration code. A degree of future
22       proofing can also be achieved: an application can support configuration
23       features in newer versions of OpenSSL automatically.
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25       A configuration file must have been previously loaded, for example
26       using CONF_modules_load_file(). See config(5) for details of the
27       configuration file syntax.
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RETURN VALUES

30       SSL_CTX_config() and SSL_config() return 1 for success or 0 if an error
31       occurred.
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EXAMPLES

34       If the file "config.cnf" contains the following:
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36        testapp = test_sect
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38        [test_sect]
39        # list of configuration modules
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41        ssl_conf = ssl_sect
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43        [ssl_sect]
44        server = server_section
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46        [server_section]
47        RSA.Certificate = server-rsa.pem
48        ECDSA.Certificate = server-ecdsa.pem
49        Ciphers = ALL:!RC4
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51       An application could call:
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53        if (CONF_modules_load_file("config.cnf", "testapp", 0) <= 0) {
54            fprintf(stderr, "Error processing config file\n");
55            goto err;
56        }
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58        ctx = SSL_CTX_new(TLS_server_method());
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60        if (SSL_CTX_config(ctx, "server") == 0) {
61            fprintf(stderr, "Error configuring server.\n");
62            goto err;
63        }
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65       In this example two certificates and the cipher list are configured
66       without the need for any additional application code.
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SEE ALSO

69       config(5), SSL_CONF_cmd(3), CONF_modules_load_file(3)
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HISTORY

72       The SSL_CTX_config() and SSL_config() functions were added in OpenSSL
73       1.1.0.
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76       Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
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78       Licensed under the OpenSSL license (the "License").  You may not use
79       this file except in compliance with the License.  You can obtain a copy
80       in the file LICENSE in the source distribution or at
81       <https://www.openssl.org/source/license.html>.
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851.1.1q                            2023-02-06                 SSL_CTX_CONFIG(3)
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