OPENSSL_VERSION(3SSL) OpenSSL OPENSSL_VERSION(3SSL)
NAME
OPENSSL_VERSION_MAJOR, OPENSSL_VERSION_MINOR, OPENSSL_VERSION_PATCH,
OPENSSL_VERSION_PRE_RELEASE, OPENSSL_VERSION_BUILD_METADATA,
OPENSSL_VERSION_TEXT, OPENSSL_VERSION_PREREQ, OPENSSL_version_major,
OPENSSL_version_minor, OPENSSL_version_patch,
OPENSSL_version_pre_release, OPENSSL_version_build_metadata,
OpenSSL_version, OPENSSL_VERSION_NUMBER, OpenSSL_version_num,
OPENSSL_info - get OpenSSL version number and other information
SYNOPSIS
#include <openssl/opensslv.h>
#define OPENSSL_VERSION_MAJOR x
#define OPENSSL_VERSION_MINOR y
#define OPENSSL_VERSION_PATCH z
/* The definitions here are typical release values */
#define OPENSSL_VERSION_PRE_RELEASE ""
#define OPENSSL_VERSION_BUILD_METADATA ""
#define OPENSSL_VERSION_TEXT "OpenSSL x.y.z xx XXX xxxx"
#define OPENSSL_VERSION_PREREQ(maj,min)
#include <openssl/crypto.h>
unsigned int OPENSSL_version_major(void);
unsigned int OPENSSL_version_minor(void);
unsigned int OPENSSL_version_patch(void);
const char *OPENSSL_version_pre_release(void);
const char *OPENSSL_version_build_metadata(void);
const char *OpenSSL_version(int t);
const char *OPENSSL_info(int t);
/* from openssl/opensslv.h */
#define OPENSSL_VERSION_NUMBER 0xnnnnnnnnL
/* from openssl/crypto.h */
unsigned long OpenSSL_version_num();
DESCRIPTION
Macros
The three macros OPENSSL_VERSION_MAJOR, OPENSSL_VERSION_MINOR and
OPENSSL_VERSION_PATCH represent the three parts of a version identifier,
MAJOR.MINOR.PATCH.
The macro OPENSSL_VERSION_PRE_RELEASE is an added bit of text that
indicates that this is a pre-release version, such as "-dev" for an
ongoing development snapshot or "-alpha3" for an alpha release. The
value must be a string.
The macro OPENSSL_VERSION_BUILD_METADATA is extra information, reserved
for other parties, such as "+fips", or "+vendor.1"). The OpenSSL
project will not touch this macro (will leave it an empty string). The
value must be a string.
OPENSSL_VERSION_STR is a convenience macro to get the short version
identifier string, "MAJOR.MINOR.PATCH".
OPENSSL_FULL_VERSION_STR is a convenience macro to get the longer
version identifier string, which combines OPENSSL_VERSION_STR,
OPENSSL_VERSION_PRE_RELEASE and OPENSSL_VERSION_BUILD_METADATA.
OPENSSL_VERSION_TEXT is a convenience macro to get a full descriptive
version text, which includes OPENSSL_FULL_VERSION_STR and the release
date.
OPENSSL_VERSION_PREREQ is a useful macro for checking whether the
OpenSSL version for the headers in use is at least at the given pre-
requisite major (maj) and minor (min) number or not. It will evaluate to
true if the header version number
(OPENSSL_VERSION_MAJOR.OPENSSL_VERSION_MINOR) is greater than or equal
to maj.min.
OPENSSL_VERSION_NUMBER is a combination of the major, minor and patch
version into a single integer 0xMNN00PP0L, where:
M is the number from OPENSSL_VERSION_MAJOR, in hexadecimal notation
NN is the number from OPENSSL_VERSION_MINOR, in hexadecimal notation
PP is the number from OPENSSL_VERSION_PATCH, in hexadecimal notation
Functions
OPENSSL_version_major(), OPENSSL_version_minor(),
OPENSSL_version_patch(), OPENSSL_version_pre_release(), and
OPENSSL_version_build_metadata() return the values of the macros above
for the build of the library, respectively.
OpenSSL_version() returns different strings depending on t:
OPENSSL_VERSION
The value of OPENSSL_VERSION_TEXT
OPENSSL_VERSION_STRING
The value of OPENSSL_VERSION_STR
OPENSSL_FULL_VERSION_STRING
The value of OPENSSL_FULL_VERSION_STR
OPENSSL_CFLAGS
The compiler flags set for the compilation process in the form
"compiler: ..." if available, or "compiler: information not
available" otherwise.
OPENSSL_BUILT_ON
The date of the build process in the form "built on: ..." if
available or "built on: date not available" otherwise. The date
would not be available in a reproducible build, for example.
OPENSSL_PLATFORM
The "Configure" target of the library build in the form "platform:
..." if available, or "platform: information not available"
otherwise.
OPENSSL_DIR
The OPENSSLDIR setting of the library build in the form "OPENSSLDIR:
"..."" if available, or "OPENSSLDIR: N/A" otherwise.
OPENSSL_ENGINES_DIR
The ENGINESDIR setting of the library build in the form "ENGINESDIR:
"..."" if available, or "ENGINESDIR: N/A" otherwise. This option is
deprecated in OpenSSL 3.0.
OPENSSL_MODULES_DIR
The MODULESDIR setting of the library build in the form "MODULESDIR:
"..."" if available, or "MODULESDIR: N/A" otherwise.
OPENSSL_CPU_INFO
The current OpenSSL cpu settings. This is the current setting of
the cpu capability flags. It is usually automatically configured but
may be set via an environment variable. The value has the same
syntax as the environment variable. For x86 the string looks like
"CPUINFO: OPENSSL_ia32cap=0x123:0x456" or "CPUINFO: N/A" if not
available.
OPENSSL_WINCTX
The Windows install context. The Windows install context is used to
compute the OpenSSL registry key name on Windows. The full registry
key is "SOFTWARE\WOW6432Node\OpenSSL-{major}.{minor}-{context}",
where "{major}", "{minor}" and "{context}" are OpenSSL's major
version number, minor version number and the Windows install
context, respectively.
For an unknown t, the text "not available" is returned.
OPENSSL_info() also returns different strings depending on t:
OPENSSL_INFO_CONFIG_DIR
The configured "OPENSSLDIR", which is the default location for
OpenSSL configuration files.
OPENSSL_INFO_ENGINES_DIR
The configured "ENGINESDIR", which is the default location for
OpenSSL engines.
OPENSSL_INFO_MODULES_DIR
The configured "MODULESDIR", which is the default location for
dynamically loadable OpenSSL modules other than engines.
OPENSSL_INFO_DSO_EXTENSION
The configured dynamically loadable module extension.
OPENSSL_INFO_DIR_FILENAME_SEPARATOR
The separator between a directory specification and a filename.
Note that on some operating systems, this is not the same as the
separator between directory elements.
OPENSSL_INFO_LIST_SEPARATOR
The OpenSSL list separator. This is typically used in strings that
are lists of items, such as the value of the environment variable
$PATH on Unix (where the separator is ":") or "%PATH%" on Windows
(where the separator is ";").
OPENSSL_INFO_CPU_SETTINGS
The current OpenSSL cpu settings. This is the current setting of
the cpu capability flags. It is usually automatically configured but
may be set via an environment variable. The value has the same
syntax as the environment variable. For x86 the string looks like
"OPENSSL_ia32cap=0x123:0x456".
OPENSSL_INFO_WINDOWS_CONTEXT
The Windows install context. The Windows install context is used to
compute the OpenSSL registry key name on Windows. The full registry
key is "SOFTWARE\WOW6432Node\OpenSSL-{major}.{minor}-{context}",
where "{major}", "{minor}" and "{context}" are OpenSSL's major
version number, minor version number and the Windows install
context, respectively.
For an unknown t, NULL is returned.
OpenSSL_version_num() returns the value of OPENSSL_VERSION_NUMBER.
RETURN VALUES
OPENSSL_version_major(), OPENSSL_version_minor() and
OPENSSL_version_patch() return the version number parts as integers.
OPENSSL_version_pre_release() and OPENSSL_version_build_metadata()
return the values of OPENSSL_VERSION_PRE_RELEASE and
OPENSSL_VERSION_BUILD_METADATA respectively as constant strings. For
any of them that is undefined, the empty string is returned.
OpenSSL_version() returns constant strings.
SEE ALSO
crypto(7)
HISTORY
The macros and functions described here were added in OpenSSL 3.0,
except for OPENSSL_VERSION_NUMBER and OpenSSL_version_num().
BUGS
There was a discrepancy between this manual and commentary + code in
<openssl/opensslv.h>, where the latter suggested that the four least
significant bits of OPENSSL_VERSION_NUMBER could be 0x0f in released
OpenSSL versions.
COPYRIGHT
Copyright 2018-2025 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.5.7 2026-06-09 OPENSSL_VERSION(3SSL)
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