openssl_version_number(3)

NAME

OPENSSL_VERSION_NUMBER, SSLeay, SSLeay_version - get OpenSSL version
number

SYNOPSIS

#include <openssl/opensslv.h>
#define OPENSSL_VERSION_NUMBER 0xnnnnnnnnnL
#include <openssl/crypto.h>
long SSLeay(void);
const char *SSLeay_version(int t);

DESCRIPTION

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.

for example

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 interpretation:

MMNNFFRBB major minor fix final beta/patch

for example

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 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.

SSLeay_version() returns different strings depending on t:

SSLEAY_VERSION

The text variant of the version number and the release date. For
example, "OpenSSL 0.9.5a 1 Apr 2000".

SSLEAY_CFLAGS

The compiler flags set for the compilation process in the form
"compiler: ..." if available or "compiler: information not
available" otherwise.

SSLEAY_BUILT_ON

The date of the build process in the form "built on: ..." if
available or "built on: date not available" otherwise.

SSLEAY_PLATFORM

The "Configure" target of the library build in the form "platform: ..." if available or "platform: information not available"
otherwise.

SSLEAY_DIR

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" is returned.

RETURN VALUE

The version number.

SEE ALSO

crypto(3)

HISTORY

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 0.9.7.

0.9.8o 2002-01-04 OPENSSL_VERSION_NUMBER(3SSL)