OPENSSL_VERSION_NUMBER

OPENSSL_VERSION_NUMBER, SSLeay ? get OpenSSL version number

 #include <openssl/opensslv.h>
 #define OPENSSL_VERSION_NUMBER 0xnnnnnnnnnL

 #include <openssl/crypto.h>
 long SSLeay(void);

OPENSSL_VERSION_NUMBER is a numeric release version identifier:

 MMNNFFRBB major minor fix final beta/patch

for example

 0x000904100 == 0.9.4 release
 0x000905000 == 0.9.5 dev

Versions prior to 0.9.3 have identifiers < 0x0930. For backward compatibility, SSLEAY_VERSION_NUMBER is also defined.

SSLeay() returns this number. The return value can be compared to the macro to make sure that the correct version of the library has been loaded, especially when using DLLs on Windows systems.

The version number.

crypto(3)

SSLeay() and SSLEAY_VERSION_NUMBER are available in all versions of SSLeay and OpenSSL. OPENSSL_VERSION_NUMBER is available in all versions of OpenSSL.