SSL_library_init(3ssl)
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
synonyms for SSL_library_init().
NOTES
SSL_library_init() must be called before any other action takes place.
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)