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Werner Koch 5a223303d7
gpg: Make "--list-options show-sig-subpackets=n,m" work again.
16 hours ago
agent common: Slight redefinition of nvc_get_boolean. 1 week ago
am build: Remove Windows CE support. 2 months ago
artwork artwork: Explain the license for the logo 2 years ago
build-aux speedo: Add updates from 2.2 2 months ago
common common: Slight redefinition of nvc_get_boolean. 1 week ago
dirmngr dirmngr: Cleanup of the no-Tor check with --gpgconf-* commands 3 weeks ago
doc gpgtar: Emit progress status lines in create mode. 2 days ago
g10 gpg: Make "--list-options show-sig-subpackets=n,m" work again. 16 hours ago
g13 tests: Support semihosted environment. 2 months ago
kbx build: Remove Windows CE support. 2 months ago
m4 build: Update m4 files. 3 months ago
po po: Update Japanese Translation. 6 days ago
regexp regexp: Import change from JimTcl. 3 years ago
scd scd:p15: Skip deleted records. 2 months ago
sm sm: Fix compliance checking for ECC signature verification. 3 weeks ago
tests tests: Fix tests/gpgme for in-source-tree builds. 1 month ago
tools gpgtar: Fix new --status-fd handling. 1 day ago
tpm2d tpm: Fix recently introduced syntax error 10 months ago
.git-blame-ignore-revs indent: Add a git blame ignore file 1 year ago
.gitignore build: Update .gitignore for translations under po/. 5 months ago
ABOUT-NLS Preparing a test release 15 years ago
AUTHORS doc: Update copyright notices. 2 weeks ago
COPYING Change all in license notices to https:// 6 years ago
COPYING.CC0 doc: Update license information. 6 years ago
COPYING.GPL2 Change license of some files to LGPLv2.1. 6 years ago
COPYING.LGPL3 Change license of some files to LGPLv2.1. 6 years ago
COPYING.LGPL21 Change license of some files to LGPLv2.1. 6 years ago
COPYING.other gpg: Add regular expression support. 3 years ago
ChangeLog Generate the ChangeLog from commit logs. 11 years ago
ChangeLog-2011 Added release date of older versions to NEWS. 8 years ago
INSTALL Upgraded gettext. 16 years ago speedo: Add updates from 2.2 2 months ago
NEWS gpg: Make "--list-options show-sig-subpackets=n,m" work again. 16 hours ago
README doc: Update copyright notices. 2 weeks ago
README.GIT build: Require automake 1.14. 8 years ago
README.maint doc: Replace README.maint content. 6 years ago
THANKS doc: Formatting fixes. 10 years ago
TODO Impleemned gpgsm's IMPORT --re-import feature. 14 years ago
acinclude.m4 build: Update for newer autoconf. 1 year ago
autogen.rc speedo: Put the keyboxd into the Windows installer 1 year ago build: Remove Windows CE support. 2 months ago doc: Update copyright notices. 2 weeks ago


                       The GNU Privacy Guard

Version 2.4

Copyright 1997-2019 Werner Koch
Copyright 1998-2021 Free Software Foundation, Inc.
Copyright 2003-2023 g10 Code GmbH


GnuPG is a complete and free implementation of the OpenPGP standard
as defined by RFC4880 (also known as PGP). GnuPG enables encryption
and signing of data and communication, and features a versatile key
management system as well as access modules for public key

GnuPG, also known as GPG, is a command line tool with features for
easy integration with other applications. A wealth of frontend
applications and libraries are available that make use of GnuPG.
Starting with version 2 GnuPG provides support for S/MIME and Secure
Shell in addition to OpenPGP.

GnuPG is Free Software (meaning that it respects your freedom). It
can be freely used, modified and distributed under the terms of the
GNU General Public License.


GnuPG 2.4 depends on the following GnuPG related packages:

npth (
libgpg-error (
libgcrypt (
libksba (
libassuan (

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

Several other standard libraries are also 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 .

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

make check
make install

The "make check" is optional but highly recommended. To run even
more tests you may add "--enable-all-tests" to the configure run.
Before running the "make 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.

In case of problem please ask on the 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.

You may run

gpgconf -L

to view the directories used by GnuPG.

To quickly build all required software without installing it, the
Speedo method may be used:

make -f build-aux/ native

This method downloads all required libraries and does a native build
of GnuPG to PLAY/inst/. GNU make is required and you need to set
LD_LIBRARY_PATH to $(pwd)/PLAY/inst/lib to test the binaries.

** Specific build problems on some machines:

*** Apple OSX 10.x using XCode

On some versions the correct location of a header file can't be
detected by configure. To fix that you should run configure like

./configure gl_cv_absolute_stdint_h=/usr/include/stdint.h

Add other options as needed.

*** Systems without a full C99 compiler

If you run into problems with your compiler complaining about dns.c
you may use

./configure --disable-libdns

Add other options as needed.


** Key database daemon

Since version 2.3.0 it is possible to store the keys in an SQLite
database instead of the keyring.kbx file. This is in particular
useful for large keyrings or if many instances of gpg and gpgsm may
run concurrently. This is implemented using another daemon process,
the "keyboxd". To enable the use of the keyboxd put the option
"use-keyboxd" into the configuration file ~/.gnupg/common.conf or the
global /etc/gnupg/common.conf. See also doc/examples/common.conf.
Only public keys and X.509 certificates are managed by the keyboxd;
private keys are still stored as separate files.

Note that there is no automatic migration; if the use-keyboxd option
is enabled keys are not taken from pubring.kbx. To migrate existing
keys to the keyboxd do this:

1. Disable the keyboxd (remove use-keyboxd from common.conf)
2. Export all public keys
gpg --export --export-options backup > allkeys.gpg
gpgsm --export --armor > allcerts.gpg
3. Enable the keyboxd (add use-keyboxd to common.conf)
4. Import all public keys
gpg --import --import-options restore < allkeys.gpg
gpgsm --import < allcerts.crt

** Socket directory

GnuPG uses Unix domain sockets to connect its components (on Windows
an emulation of these sockets is used). Depending on the type of
the file system, it is sometimes not possible to use the GnuPG home
directory (i.e. ~/.gnupg) as the location for the sockets. To solve
this problem GnuPG prefers the use of a per-user directory below the
the /run (or /var/run) hierarchy for the sockets. It is thus
suggested to create per-user directories on system or session
startup. For example, the following snippet can be used in
/etc/rc.local to create these directories:

[ ! -d /run/user ] && mkdir /run/user
awk -F: </etc/passwd '$3 >= 1000 && $3 < 65000 {print $3}' \
| ( while read uid rest; do
if [ ! -d "/run/user/$uid" ]; then
mkdir /run/user/$uid
chown $uid /run/user/$uid
chmod 700 /run/user/$uid
done )


The complete documentation is in the texinfo manual named
`'. 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 [[]] . A
version of the manual pertaining to the current development snapshot
is at [[]] .

* Using the legacy version GnuPG 1.4

The 1.4 version of GnuPG is only intended to allow decryption of old
data material using legacy keys which are not anymore supported by
GnuPG 2.x. To install both versions alongside, it is suggested to
rename the 1.4 version of "gpg" to "gpg1" as well as the
corresponding man page. Newer releases of the 1.4 branch will
likely do this by default.


A description of new features and changes since version 2.1 can be
found in the file "doc/whats-new-in-2.1.txt" and online at
"" .

The primary WWW page is ""
The primary FTP site is ""

See [[]] 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: 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. For general user discussion and
help. GnuPG developers main forum.

You subscribe to one of the list by sending mail with a subject of
"subscribe" to, where x is the name of the
mailing list (gnupg-announce, gnupg-users, etc.). See for archives
of the mailing lists.

Please direct bug reports to [[]] or post them
direct to the mailing list <>.

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 mailing lists are watched by the authors and we try to
answer questions as time allows us.

Commercial grade support for GnuPG is available; for a listing of
offers see . Maintaining and
improving GnuPG requires a lot of time. 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.

# 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
# Local Variables:
# mode:org
# End: