/usr/man2/cat.3/SSL_library_init.3.Z(/usr/man2/cat.3/SSL_library_init.3.Z)

NAME

       SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
       - initialize SSL library by registering algorithms

SYNOPSIS

        #include <openssl/ssl.h>

        int SSL_library_init(void);
        #define OpenSSL_add_ssl_algorithms()    SSL_library_init()
        #define SSLeay_add_ssl_algorithms()     SSL_library_init()

DESCRIPTION

       SSL_library_init() registers the available SSL/TLS ciphers and digests.

       OpenSSL_add_ssl_algorithms() and SSLeay_add_ssl_algorithms() are syn-
       onyms for SSL_library_init().

NOTES

       SSL_library_init() must be called before any other action takes place.
       SSL_library_init() is not reentrant.

WARNING

       SSL_library_init() adds ciphers and digests used directly and indi-
       rectly by SSL/TLS.

EXAMPLES

       A typical TLS/SSL application will start with the library initializa-
       tion, and provide readable error messages.

        SSL_load_error_strings();                /* readable error messages */
        SSL_library_init();                      /* initialize library */

RETURN VALUES

       SSL_library_init() always returns "1", so it is safe to discard the
       return value.

NOTES

       OpenSSL 0.9.8o and 1.0.0a and later added SHA2 algorithms to
       SSL_library_init().  Applications which need to use SHA2 in earlier
       versions of OpenSSL should call OpenSSL_add_all_algorithms() as well.

SEE ALSO

       ssl(3), SSL_load_error_strings(3), RAND_add(3)

1.0.2t                            2019-09-10               SSL_library_init(3)
See also OpenSSL_add_ssl_algorithms(3)
See also SSLeay_add_ssl_algorithms(3)