opnsense-src/secure/lib/libcrypto/man/SSL_library_init.3

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.\"
.IX Title "SSL_LIBRARY_INIT 1"
.TH SSL_LIBRARY_INIT 1 "perl v5.6.1" "2000-11-13" "User Contributed Perl Documentation"
.UC
.SH "NAME"
SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
\&\- initialize \s-1SSL\s0 library by registering algorithms
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
.Ve
.Vb 3
\& int SSL_library_init(void);
\& #define OpenSSL_add_ssl_algorithms()    SSL_library_init()
\& #define SSLeay_add_ssl_algorithms()     SSL_library_init()
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_library_init()\fR registers the available ciphers and digests.
.PP
\&\fIOpenSSL_add_ssl_algorithms()\fR and \fISSLeay_add_ssl_algorithms()\fR are synonyms
for \fISSL_library_init()\fR.
.SH "NOTES"
.IX Header "NOTES"
\&\fISSL_library_init()\fR must be called before any other action takes place.
.SH "WARNING"
.IX Header "WARNING"
\&\fISSL_library_init()\fR only registers ciphers. Another important initialization
is the seeding of the \s-1PRNG\s0 (Pseudo Random Number Generator), which has to
be performed separately.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
A typical \s-1TLS/SSL\s0 application will start with the library initialization,
will provide readable error messages and will seed the \s-1PRNG\s0.
.PP
.Vb 3
\& SSL_load_error_strings();                /* readable error messages */
\& SSL_library_init();                      /* initialize library */
\& actions_to_seed_PRNG();
.Ve
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fISSL_library_init()\fR always returns \*(L"1\*(R", so it is safe to discard the return
value.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
ssl(3), SSL_load_error_strings(3),
RAND_add(3)