OPENSSL_VERSION_NUMBER, SSLeay, SSLeay_version — get OpenSSL version number
#include <openssl/crypto.h> long
const char *SSLeay_version(int t);
OPENSSL_VERSION_NUMBER is a numeric release version identifier:
MMNNFFPPS: major minor fix patch status
The status nibble has one of the values 0 for development,
1 to e for betas 1 to 14, and f for release.
0x000906000 == 0.9.6 dev
0x000906023 == 0.9.6b beta 3
0x00090605f == 0.9.6e release
Versions prior to 0.9.3 have identifiers < 0x0930.
Versions between 0.9.3 and 0.9.5 had a version identifier with this
MMNNFFRBB major minor fix final beta/patch
0x000904100 == 0.9.4 release
0x000905000 == 0.9.5 dev
Version 0.9.5a had an interim interpretation that is like
the current one, except the patch level got the highest bit set,
to keep continuity. The number was therefore 0x0090581f.
For backward compatibility, SSLEAY_VERSION_NUMBER is also
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.
SSLeay_version() returns different strings depending on t:
The text variant of the version number and the release date.
For example, "OpenSSL 0.9.5a 1 Apr 2000".
The compiler flags set for the compilation process in the
form "compiler: ..." if available or "compiler: information not
The date of the build process in the form "built on: ..."
if available or "built on: date not available" otherwise.
The "Configure" target of the library build in the form "platform:
..." if available or "platform: information not available" otherwise.
The "OPENSSLDIR" setting of the library build in the form
"OPENSSLDIR: "..."" if available or "OPENSSLDIR: N/A" otherwise.
For an unknown t, the text "not available"
The version number.
SSLeay() and SSLEAY_VERSION_NUMBER are available in all versions
of SSLeay and OpenSSL. OPENSSL_VERSION_NUMBER is available in all
versions of OpenSSL. SSLEAY_DIR was added in OpenSSL