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.

RETURN VALUES

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

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 */

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

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