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Man Pages


Manual Reference Pages  -  SSL_LIBRARY_INIT (3)

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NAME

SSL_library_init, OpenSSL_add_ssl_algorithms, SSLeay_add_ssl_algorithms - initialize SSL library by registering algorithms

CONTENTS

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.

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 */



RETURN VALUES

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

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

ssl(3), SSL_load_error_strings(3), RAND_add(3)
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1.0.1s SSL_LIBRARY_INIT (3) 2016-03-01

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