OpenSSL_add_ssl_algorithms(3ssl)

1SSL_library_init(3)                 OpenSSL                SSL_library_init(3)
2
3
4

NAME

6       SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
7       - initialize SSL library by registering algorithms
8

SYNOPSIS

10        #include <openssl/ssl.h>
11
12        int SSL_library_init(void);
13        #define OpenSSL_add_ssl_algorithms()    SSL_library_init()
14        #define SSLeay_add_ssl_algorithms()     SSL_library_init()
15

DESCRIPTION

17       SSL_library_init() registers the available ciphers and digests.
18
19       OpenSSL_add_ssl_algorithms() and SSLeay_add_ssl_algorithms() are syn‐
20       onyms for SSL_library_init().
21

NOTES

23       SSL_library_init() must be called before any other action takes place.
24

WARNING

26       SSL_library_init() only registers ciphers. Another important initial‐
27       ization is the seeding of the PRNG (Pseudo Random Number Generator),
28       which has to be performed separately.
29

EXAMPLES

31       A typical TLS/SSL application will start with the library initializa‐
32       tion, will provide readable error messages and will seed the PRNG.
33
34        SSL_load_error_strings();                /* readable error messages */
35        SSL_library_init();                      /* initialize library */
36        actions_to_seed_PRNG();
37

RETURN VALUES

39       SSL_library_init() always returns "1", so it is safe to discard the
40       return value.
41