                       The GNU Privacy Guard 2
                      =========================
                             Version 2.1

   THIS IS A DEVELOPMENT VERSION AND NOT INTENDED FOR REGULAR USE.

          Copyright 1997-1998, 2013-2014 Werner Koch
          Copyright 1998-2013 Free Software Foundation, Inc.


INTRODUCTION
============

GnuPG is a tool for secure communication and data storage.  It can be
used to encrypt data and to create digital signatures.  It includes an
advanced key management facility and is compliant with the proposed
OpenPGP Internet standard as described in RFC4880 and the S/MIME
standard as described by several RFCs.

GnuPG is distributed under the terms of the GNU General Public
License.  See the file COPYING for details.  GnuPG works best on
GNU/Linux or *BSD systems.  Most other Unices are also supported but
are not as well tested as the Free Unices.

GnuPG-2 is the stable version of GnuPG integrating support for OpenPGP
and S/MIME.  It does not conflict with an installed 1.4 OpenPGP-only
version.


BUILD INSTRUCTIONS
==================

GnuPG 2.1 depends on the following packages:

  npth         (ftp://ftp.gnupg.org/gcrypt/npth/)
  libgpg-error (ftp://ftp.gnupg.org/gcrypt/libgpg-error/)
  libgcrypt    (ftp://ftp.gnupg.org/gcrypt/libgcrypt/)
  libksba      (ftp://ftp.gnupg.org/gcrypt/libksba/)
  libassuan    (ftp://ftp.gnupg.org/gcrypt/libassuan/)

You should get the latest versions of course, the GnuPG configure
script complains if a version is not sufficient.

For some advanced features several other libraries are required.  The
configure script prints diagnostic messages if one of these libraries
is not available and a feature will not be available..

You also need the Pinentry package for most functions of GnuPG;
however it is not a build requirement.  Pinentry is available at
ftp://ftp.gnupg.org/gcrypt/pinentry/ .

After building and installing the above packages in the order as given
above, you may continue with GnuPG installation (you may also just try
to build GnuPG to see whether your already installed versions are
sufficient).

As with all packages, you just have to do

 ./configure
 make
 make install

(Before doing install you might need to become root.)

If everything succeeds, you have a working GnuPG with support for
OpenPGP, S/MIME, ssh-agent, and smartcards.  Note that there is no
binary gpg but a gpg2 so that this package won't conflict with a GnuPG
1.4 installation.  gpg2 behaves just like gpg.

In case of problem please ask on the gnupg-users@gnupg.org mailing
list for advise.

Instruction on how to build for Windows can be found in the file
doc/HACKING in the section "How to build an installer for Windows".
This requires some experience as developer.

Note that the PKITS tests are always skipped unless you copy the PKITS
test data file into the tests/pkits directory.  There is no need to
run these test and some of them may even fail because the test scripts
are not yet complete.

You may run

  gpgconf --list-dirs

to view the default directories used by GnuPG.


MIGRATION FROM 1.4 or 2.0 to 2.1
================================

The major change in 2.1 is gpg-agent taking care of the OpenPGP secret
keys (those managed by GPG).  The former file "secring.gpg" will not
be used anymore.  Newly generated keys are stored in the agent's key
store directory "~/.gnupg/private-keys-v1.d/".  The first time gpg
needs a secret key it checks whether a "secring.gpg" exists and
copies them to the new store.  The old secring.gpg is kept for use by
older versions of gpg.

Note that gpg-agent now uses a fixed socket by default.  All tools
will start the gpg-agent as needed.  In general there is no more need
to set the GPG_AGENT_INFO environment variable.  The SSH_AUTH_SOCK
environment variable should be set to a fixed value.

GPG's smartcard commands --card-edit and --card-status as well as some
of the card related sub-commands of --edit-key are not yet fully
supported.  However, signing and decryption with a smartcard does
work.

The Dirmngr is now part of GnuPG proper and also used to access
OpenPGP keyservers.  The directroy layout of Dirmngr changed to make
use of the GnuPG directories.  Dirmngr is started by gpg or gpgsm as
needed needed. There is no more need to install a separate dirmngr
package.



DOCUMENTATION
=============

The complete documentation is in the texinfo manual named
`gnupg.info'.  Run "info gnupg" to read it.  If you want a a printable
copy of the manual, change to the "doc" directory and enter "make pdf"
For a HTML version enter "make html" and point your browser to
gnupg.html/index.html.  Standard man pages for all components are
provided as well.  An online version of the manual is available at
http://www.gnupg.org/documentation/manuals/gnupg/ .  A version of the
manual pertaining to the current development snapshot is at
http://www.gnupg.org/documentation/manuals/gnupg-devel/ .


GNUPG 1.4 AND GNUPG 2.0
=======================

GnuPG 2.0 is a newer version of GnuPG with additional support for
S/MIME.  It has a different design philosophy that splits
functionality up into several modules.  Both versions may be installed
simultaneously without any conflict (gpg is called gpg2 in GnuPG 2).
In fact, the gpg version from GnuPG 1.4 is able to make use of the
gpg-agent as included in GnuPG 2 and allows for seamless passphrase
caching.  The advantage of GnuPG 1.4 is its smaller size and no
dependency on other modules at run and build time.


HOW TO GET MORE INFORMATION
===========================

The primary WWW page is "https://www.gnupg.org"
           or using TOR "http://ic6au7wa3f6naxjq.onion"
The primary FTP site is "ftp://ftp.gnupg.org/gcrypt/"

See https://www.gnupg.org/download/mirrors.html for a list of mirrors
and use them if possible.  You may also find GnuPG mirrored on some of
the regular GNU mirrors.

We have some mailing lists dedicated to GnuPG:

   gnupg-announce@gnupg.org   For important announcements like new
                              versions and such stuff.  This is a
                              moderated list and has very low traffic.
                              Do not post to this list.

   gnupg-users@gnupg.org      For general user discussion and
                              help (English).

   gnupg-de@gnupg.org         German speaking counterpart of
                              gnupg-users.

   gnupg-ru@gnupg.org         Russian speaking counterpart of
                              gnupg-users.

   gnupg-devel@gnupg.org      GnuPG developers main forum.

You subscribe to one of the list by sending mail with a subject of
"subscribe" to x-request@gnupg.org, where x is the name of the mailing
list (gnupg-announce, gnupg-users, etc.).  An archive of the mailing
lists are available at http://www.gnupg.org/documentation/mailing-lists.html

Please direct bug reports to http://bugs.gnupg.org or post them direct
to the mailing list <gnupg-devel@gnupg.org>.

Please direct questions about GnuPG to the users mailing list or one
of the pgp newsgroups; please do not direct questions to one of the
authors directly as we are busy working on improvements and bug fixes.
The English and German mailing lists are watched by the authors and we
try to answer questions when time allows us to do so.

Commercial grade support for GnuPG is available; for a listing of
offers see https://www.gnupg.org/service.html .  Maintaining and
improving GnuPG is costly.  Since 2001, g10 Code GmbH, a German
company owned and headed by GnuPG's principal author Werner Koch, is
bearing the majority of these costs.  To help them carry on this work,
they need your support.  See https://gnupg.org/donate/ .

  This file is Free Software; as a special exception the authors gives
  unlimited permission to copy and/or distribute it, with or without
  modifications, as long as this notice is preserved. For conditions
  of the whole package, please see the file COPYING.  This file is
  distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY, to the extent permitted by law; without even the implied
  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
