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129 .\" ========================================================================
130 .\"
131 .IX Title "SSL_library_init 3"
132 .TH SSL_library_init 3 "2006-11-19" "0.9.8d" "OpenSSL"
133 .SH "NAME"
134 SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms
135 \&\- initialize SSL library by registering algorithms
136 .SH "SYNOPSIS"
137 .IX Header "SYNOPSIS"
138 .Vb 1
139 \& #include <openssl/ssl.h>
140 .Ve
141 .PP
142 .Vb 3
143 \& int SSL_library_init(void);
144 \& #define OpenSSL_add_ssl_algorithms() SSL_library_init()
145 \& #define SSLeay_add_ssl_algorithms() SSL_library_init()
146 .Ve
147 .SH "DESCRIPTION"
148 .IX Header "DESCRIPTION"
149 \&\fISSL_library_init()\fR registers the available ciphers and digests.
150 .PP
151 \&\fIOpenSSL_add_ssl_algorithms()\fR and \fISSLeay_add_ssl_algorithms()\fR are synonyms
152 for \fISSL_library_init()\fR.
153 .SH "NOTES"
154 .IX Header "NOTES"
155 \&\fISSL_library_init()\fR must be called before any other action takes place.
156 .SH "WARNING"
157 .IX Header "WARNING"
158 \&\fISSL_library_init()\fR only registers ciphers. Another important initialization
159 is the seeding of the \s-1PRNG\s0 (Pseudo Random Number Generator), which has to
160 be performed separately.
161 .SH "EXAMPLES"
162 .IX Header "EXAMPLES"
163 A typical \s-1TLS/SSL\s0 application will start with the library initialization,
164 will provide readable error messages and will seed the \s-1PRNG\s0.
165 .PP
166 .Vb 3
167 \& SSL_load_error_strings(); /* readable error messages */
168 \& SSL_library_init(); /* initialize library */
169 \& actions_to_seed_PRNG();
170 .Ve
171 .SH "RETURN VALUES"
172 .IX Header "RETURN VALUES"
173 \&\fISSL_library_init()\fR always returns \*(L"1\*(R", so it is safe to discard the return
174 value.
175 .SH "SEE ALSO"
176 .IX Header "SEE ALSO"
177 \&\fIssl\fR\|(3), \fISSL_load_error_strings\fR\|(3),
178 \&\fIRAND_add\fR\|(3)