SSL_library_init
Section: OpenSSL (3)
Updated: 2019-02-26
Page Index
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.
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)