1SSL_library_init(3) OpenSSL SSL_library_init(3)
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6 SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
7 - initialize SSL library by registering algorithms
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10 #include <openssl/ssl.h>
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12 int SSL_library_init(void);
13 #define OpenSSL_add_ssl_algorithms() SSL_library_init()
14 #define SSLeay_add_ssl_algorithms() SSL_library_init()
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17 SSL_library_init() registers the available SSL/TLS ciphers and digests.
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19 OpenSSL_add_ssl_algorithms() and SSLeay_add_ssl_algorithms() are
20 synonyms for SSL_library_init().
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23 SSL_library_init() must be called before any other action takes place.
24 SSL_library_init() is not reentrant.
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27 SSL_library_init() adds ciphers and digests used directly and
28 indirectly by SSL/TLS.
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31 A typical TLS/SSL application will start with the library
32 initialization, and provide readable error messages.
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34 SSL_load_error_strings(); /* readable error messages */
35 SSL_library_init(); /* initialize library */
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38 SSL_library_init() always returns "1", so it is safe to discard the
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42 OpenSSL 0.9.8o and 1.0.0a and later added SHA2 algorithms to
43 SSL_library_init(). Applications which need to use SHA2 in earlier
44 versions of OpenSSL should call OpenSSL_add_all_algorithms() as well.
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47 ssl(3), SSL_load_error_strings(3), RAND_add(3)
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511.0.2o 2019-09-10 SSL_library_init(3)