![LibreSSL image](http://www.libressl.org/images/libressl.jpg)
## Official portable version of [LibreSSL](http://www.libressl.org) ##

[![Build Status](https://travis-ci.org/libressl-portable/portable.svg?branch=master)](https://travis-ci.org/libressl-portable/portable)

LibreSSL is a fork of [OpenSSL](https://www.openssl.org) 1.0.1g developed by the
[OpenBSD](http://www.openbsd.org) project.  Our goal is to modernize the codebase,
improve security, and apply best practice development processes from OpenBSD.

## Compatibility with OpenSSL: ##

LibreSSL is API compatible with OpenSSL 1.0.1, but does not yet include all
new APIs from OpenSSL 1.0.2 and later. LibreSSL also includes APIs not yet
present in OpenSSL. The current common API subset is OpenSSL 1.0.1.

LibreSSL it is not ABI compatible with any release of OpenSSL, or necessarily
earlier releases of LibreSSL. You will need to relink your programs to
LibreSSL in order to use it, just as in moving between major versions of OpenSSL.
LibreSSL's installed library version numbers are incremented to account for
ABI and API changes.

## Compatibility with other operating systems: ##

While primarily developed on and taking advantage of APIs available on OpenBSD,
the LibreSSL portable project attempts to provide working alternatives for
other operating systems, and assists with improving OS-native implementations
where possible.

At the time of this writing, LibreSSL is know to build and work on:

* Linux (kernel 3.17 or later recommended)
* FreeBSD (tested with 9.2 and later)
* NetBSD (tested with 6.1.5)
* HP-UX (11i)
* Solaris (11 and later preferred)
* Mac OS X (tested with 10.8 and later)
* AIX (5.3 and later)

LibreSSL also supports the following Windows environments:
* Microsoft Windows (XP or higher, x86 and x64)
* Wine (32-bit and 64-bit)
* Builds with Mingw-w64, Cygwin, and Visual Studio

Official release tarballs are available at your friendly neighborhood
OpenBSD mirror in directory
[LibreSSL](http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/),
although we suggest that you use a [mirror](http://www.openbsd.org/ftp.html).

The LibreSSL portable build framework is also
[mirrored](https://github.com/libressl-portable/portable) in Github.

Please report bugs either to the public libressl@openbsd.org mailing list,
or to the github
[issue tracker](https://github.com/libressl-portable/portable/issues)

Severe vulnerabilities or bugs requiring coordination with OpenSSL can be
sent to the core team at libressl-security@openbsd.org.

## Prerequisites when building from git ##

If you have checked this source using Git, follow these initial steps to
prepare the source tree for building:

1. Ensure you have the following packages installed:
   automake, autoconf, git, libtool, perl, pod2man
2. Run './autogen.sh' to prepare the source tree for building or
   run './dist.sh' to prepare a tarball.

## Building LibreSSL ##

Once you have a source tree from Git or FTP, run these commands to build and
install the package on most systems:

```sh
./configure   # see ./configure --help for configuration options
make check    # runs builtin unit tests
make install  # set DESTDIR= to install to an alternate location
```

If you wish to use the CMake build system, use these commands:

```sh
mkdir build
cd build
cmake ..
make
make test
```

For faster builds, you can use Ninja as well:

```sh
mkdir build-ninja
cd build-ninja
cmake -G"Ninja" ..
ninja
ninja test
```

### OS specific build information: ###

#### HP-UX (11i) ####

Set the UNIX_STD environment variable to '2003' before running 'configure'
in order to build with the HP C/aC++ compiler. See the "standards(5)" man
page for more details.

```sh
export UNIX_STD=2003
./configure
make
```

#### Windows - Mingw-w64 ####

LibreSSL builds against relatively recent versions of Mingw-w64, not to be
confused with the original mingw.org project.  Mingw-w64 3.2 or later
should work. See README.windows for more information

#### Windows - Visual Studio ####

LibreSSL builds using the CMake target "Visual Studio 12 2013", and may build
against older/newer targets as well. To generate a Visual Studio project,
install CMake, enter the LibreSSL source directory and run:

```sh
 mkdir build-vs2013
 cd build-vs2013
 cmake -G"Visual Studio 12 2013" ..
```

This will generate a LibreSSL.sln file that you can incorporate into other
projects or build by itself.