]> CyberLeo.Net >> Repos - FreeBSD/releng/9.2.git/blob - crypto/openssl/doc/ssl/SSL_library_init.pod
- Copy stable/9 to releng/9.2 as part of the 9.2-RELEASE cycle.
[FreeBSD/releng/9.2.git] / crypto / openssl / doc / ssl / SSL_library_init.pod
1 =pod
2
3 =head1 NAME
4
5 SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
6 - initialize SSL library by registering algorithms
7
8 =head1 SYNOPSIS
9
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
16 =head1 DESCRIPTION
17
18 SSL_library_init() registers the available SSL/TLS ciphers and digests.
19
20 OpenSSL_add_ssl_algorithms() and SSLeay_add_ssl_algorithms() are synonyms
21 for SSL_library_init().
22
23 =head1 NOTES
24
25 SSL_library_init() must be called before any other action takes place.
26
27 =head1 WARNING
28
29 SSL_library_init() adds ciphers and digests used directly and indirectly by
30 SSL/TLS.
31
32 =head1 EXAMPLES
33
34 A typical TLS/SSL application will start with the library initialization,
35 and provide readable error messages.
36
37  SSL_load_error_strings();                /* readable error messages */
38  SSL_library_init();                      /* initialize library */
39
40 =head1 RETURN VALUES
41
42 SSL_library_init() always returns "1", so it is safe to discard the return
43 value.
44
45 =head1 NOTES
46
47 OpenSSL 0.9.8o and 1.0.0a and later added SHA2 algorithms to SSL_library_init().
48 Applications which need to use SHA2 in earlier versions of OpenSSL should call
49 OpenSSL_add_all_algorithms() as well.
50
51 =head1 SEE ALSO
52
53 L<ssl(3)|ssl(3)>, L<SSL_load_error_strings(3)|SSL_load_error_strings(3)>,
54 L<RAND_add(3)|RAND_add(3)>
55
56 =cut