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libtls(7)            BSD Miscellaneous Information Manual            libtls(7)
NAME
     LibreTLS -- libtls for OpenSSL
DESCRIPTION
     LibreTLS is a port of libtls from LibreSSL to OpenSSL.  libtls:
           https://man.openbsd.org/tls_init.3
     is ``a new TLS library, designed to make it easier to write foolproof
     applications''.
     libtls provides an excellent new API, but LibreSSL can be difficult to
     install on systems which already use OpenSSL.  LibreTLS aims to make the
     libtls API more easily and widely available.
   Releases
     LibreTLS is based on LibreSSL-portable:
           https://www.libressl.org/releases.html
     sources.  LibreTLS releases track LibreSSL releases, starting with ver-
     sion 3.2.0.  If patches must be released between LibreSSL releases, the
     letter `p' followed by an increasing digit starting from 1 will be added
     to the version number.
     LibreTLS release tarballs are available from .:
           https://causal.agency/libretls/
   Compatibility
     The libtls provided by LibreTLS is ABI-compatible with the libtls pro-
     vided by the corresponding LibreSSL release.
     The behaviour of LibreTLS and LibreSSL differs in how the root certifi-
     cates are loaded by default.  LibreSSL uses a hardcoded path to a CA bun-
     dle file, while LibreTLS uses the default CA locations of OpenSSL, which
     may include a CA directory.  To restore the behaviour of LibreSSL, call
     tls_config_set_ca_file(3) with the path returned by
     tls_default_ca_cert_file(3).  All other behaviour should be identical.
     LibreTLS targets the OpenSSL 1.1.1 series.  Due to a bug in OpenSSL, only
     versions 1.1.1b and newer are known to work.  LibreTLS is compatible with
     OpenSSL 3.0.0 but hasn't been ported away from deprecated APIs.
   Platform Support
     LibreTLS should work on the same platforms as LibreSSL-portable:
           https://www.libressl.org/releases.html,
     though it has not been thoroughly tested on platforms other than Linux,
     FreeBSD and macOS.
   License
     libtls consists of all new code developed as part of OpenBSD under
     OpenBSD's preferred license:
           https://www.openbsd.org/policy.html
     of ISC.  Some compat sources are under the 3-clause BSD license or the
     MIT license.
     LibreTLS is not encumbered by the dual-licensing of OpenSSL under both
     the OpenSSL license and the original SSLeay license, which are incompati-
     ble with the GNU General Public License.  When OpenSSL 3.0 is released
     under the Apache 2.0 license, software under the GPLv3 will be able to
     link against LibreTLS and OpenSSL without additional permissions.
INSTALLING
     To install from a release tarball, run the following:
           ./configure
           make all
           make install
     To install from a git checkout, autoconf, automake and libtool are
     required.  Run the following before continuing with the steps above:
           autoreconf -fi
AUTHORS
     LibreTLS is maintained by June McEnroe <june AT causal.agency>.
     LibreSSL is developed by The OpenBSD project: https://www.openbsd.org.
Causal Agency                  February 27, 2022                 Causal Agency