=pod =head1 NAME SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms - initialize SSL library by registering algorithms =head1 SYNOPSIS #include int SSL_library_init(void); #define OpenSSL_add_ssl_algorithms() SSL_library_init() #define SSLeay_add_ssl_algorithms() SSL_library_init() =head1 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(). =head1 NOTES SSL_library_init() must be called before any other action takes place. SSL_library_init() is not reentrant. =head1 WARNING SSL_library_init() mainly adds ciphers and digests used directly by SSL/TLS. In some cases this is not sufficient and errors about unknown algorithms will occur: for example when an attempt is made to use a certificate using SHA256. This can be resolved by also calling OpenSSL_add_all_algorithms(). =head1 EXAMPLES A typical TLS/SSL application will start with the library initialization, will provide readable error messages and will seed the PRNG. SSL_load_error_strings(); /* readable error messages */ SSL_library_init(); /* initialize library */ actions_to_seed_PRNG(); =head1 RETURN VALUES SSL_library_init() always returns "1", so it is safe to discard the return value. =head1 SEE ALSO L, L, L =cut