SSL_library_init(3) - NetBSD Manual Pages

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SSL_library_init(3)                 OpenSSL                SSL_library_init(3)




NAME

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


LIBRARY

       libcrypto, -lcrypto


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
       synonyms 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
       indirectly by SSL/TLS.


EXAMPLES

       A typical TLS/SSL application will start with the library
       initialization, 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)



1.0.1c                            2011-06-05               SSL_library_init(3)