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Man Pages


Manual Reference Pages  -  OPENSSL_VERSION_NUMBER (3)

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NAME

OPENSSL_VERSION_NUMBER, SSLeay, SSLeay_version - get OpenSSL version number

CONTENTS

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.
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1.0.1s OPENSSL_VERSION_NUMBER (3) 2016-03-01

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