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* agent/command-ssh.c (ssh_handler_request_identities): Remove double check of ERR. * g10/getkey.c (get_pubkey_byname): Remove double use of break. * g10/pkglue.c (pk_encrypt): Handle possible NULL-ptr access due to failed malloc. Signed-off-by: Werner Koch <wk@gnupg.org>
229 lines
8.5 KiB
Plaintext
229 lines
8.5 KiB
Plaintext
The GNU Privacy Guard 2
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=========================
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Version 2.3
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Copyright 1997-2019 Werner Koch
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Copyright 1998-2021 Free Software Foundation, Inc.
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Copyright 2003-2021 g10 Code GmbH
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* INTRODUCTION
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GnuPG is a complete and free implementation of the OpenPGP standard
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as defined by RFC4880 (also known as PGP). GnuPG enables encryption
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and signing of data and communication, and features a versatile key
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management system as well as access modules for public key
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directories.
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GnuPG, also known as GPG, is a command line tool with features for
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easy integration with other applications. A wealth of frontend
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applications and libraries are available that make use of GnuPG.
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Starting with version 2 GnuPG provides support for S/MIME and Secure
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Shell in addition to OpenPGP.
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GnuPG is Free Software (meaning that it respects your freedom). It
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can be freely used, modified and distributed under the terms of the
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GNU General Public License.
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* BUILD INSTRUCTIONS
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GnuPG 2.3 depends on the following GnuPG related packages:
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npth (https://gnupg.org/ftp/gcrypt/npth/)
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libgpg-error (https://gnupg.org/ftp/gcrypt/libgpg-error/)
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libgcrypt (https://gnupg.org/ftp/gcrypt/libgcrypt/)
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libksba (https://gnupg.org/ftp/gcrypt/libksba/)
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libassuan (https://gnupg.org/ftp/gcrypt/libassuan/)
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You should get the latest versions of course, the GnuPG configure
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script complains if a version is not sufficient.
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Several other standard libraries are also required. The configure
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script prints diagnostic messages if one of these libraries is not
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available and a feature will not be available..
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You also need the Pinentry package for most functions of GnuPG;
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however it is not a build requirement. Pinentry is available at
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https://gnupg.org/ftp/gcrypt/pinentry/ .
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After building and installing the above packages in the order as
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given above, you may continue with GnuPG installation (you may also
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just try to build GnuPG to see whether your already installed
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versions are sufficient).
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As with all packages, you just have to do
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./configure
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make
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make check
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make install
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The "make check" is optional but highly recommended. To run even
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more tests you may add "--enable-all-tests" to the configure run.
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Before running the "make install" you might need to become root.
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If everything succeeds, you have a working GnuPG with support for
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OpenPGP, S/MIME, ssh-agent, and smartcards.
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In case of problem please ask on the gnupg-users@gnupg.org mailing
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list for advise.
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Instruction on how to build for Windows can be found in the file
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doc/HACKING in the section "How to build an installer for Windows".
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This requires some experience as developer.
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You may run
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gpgconf --list-dirs
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to view the directories used by GnuPG.
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To quickly build all required software without installing it, the
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Speedo method may be used:
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make -f build-aux/speedo.mk native
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This method downloads all required libraries and does a native build
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of GnuPG to PLAY/inst/. GNU make is required and you need to set
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LD_LIBRARY_PATH to $(pwd)/PLAY/inst/lib to test the binaries.
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** Specific build problems on some machines:
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*** Apple OSX 10.x using XCode
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On some versions the correct location of a header file can't be
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detected by configure. To fix that you should run configure like
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this
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./configure gl_cv_absolute_stdint_h=/usr/include/stdint.h
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Add other options as needed.
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*** Systems without a full C99 compiler
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If you run into problems with your compiler complaining about dns.c
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you may use
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./configure --disable-libdns
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Add other options as needed.
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* RECOMMENDATIONS
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** Socket directory
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GnuPG uses Unix domain sockets to connect its components (on Windows
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an emulation of these sockets is used). Depending on the type of
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the file system, it is sometimes not possible to use the GnuPG home
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directory (i.e. ~/.gnupg) as the location for the sockets. To solve
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this problem GnuPG prefers the use of a per-user directory below the
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the /run (or /var/run) hierarchy for the sockets. It is thus
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suggested to create per-user directories on system or session
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startup. For example, the following snippet can be used in
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/etc/rc.local to create these directories:
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[ ! -d /run/user ] && mkdir /run/user
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awk -F: </etc/passwd '$3 >= 1000 && $3 < 65000 {print $3}' \
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| ( while read uid rest; do
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if [ ! -d "/run/user/$uid" ]; then
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mkdir /run/user/$uid
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chown $uid /run/user/$uid
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chmod 700 /run/user/$uid
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fi
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done )
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* DOCUMENTATION
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The complete documentation is in the texinfo manual named
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`gnupg.info'. Run "info gnupg" to read it. If you want a a
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printable copy of the manual, change to the "doc" directory and
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enter "make pdf" For a HTML version enter "make html" and point your
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browser to gnupg.html/index.html. Standard man pages for all
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components are provided as well. An online version of the manual is
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available at [[https://gnupg.org/documentation/manuals/gnupg/]] . A
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version of the manual pertaining to the current development snapshot
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is at [[https://gnupg.org/documentation/manuals/gnupg-devel/]] .
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* Using the legacy version GnuPG 1.4
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The 1.4 version of GnuPG is only intended to allow decryption of old
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data material using legacy keys which are not anymore supported by
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GnuPG 2.x. To install both versions alongside, it is suggested to
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rename the 1.4 version of "gpg" to "gpg1" as well as the
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corresponding man page. Newer releases of the 1.4 branch will
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likely do this by default.
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* HOW TO GET MORE INFORMATION
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A description of new features and changes since version 2.1 can be
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found in the file "doc/whats-new-in-2.1.txt" and online at
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"https://gnupg.org/faq/whats-new-in-2.1.html" .
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The primary WWW page is "https://gnupg.org"
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The primary FTP site is "https://gnupg.org/ftp/gcrypt/"
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See [[https://gnupg.org/download/mirrors.html]] for a list of
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mirrors and use them if possible. You may also find GnuPG mirrored
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on some of the regular GNU mirrors.
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We have some mailing lists dedicated to GnuPG:
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gnupg-announce@gnupg.org For important announcements like new
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versions and such stuff. This is a
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moderated list and has very low traffic.
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Do not post to this list.
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gnupg-users@gnupg.org For general user discussion and
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help (English).
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gnupg-de@gnupg.org German speaking counterpart of
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gnupg-users.
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gnupg-ru@gnupg.org Russian speaking counterpart of
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gnupg-users.
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gnupg-devel@gnupg.org GnuPG developers main forum.
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You subscribe to one of the list by sending mail with a subject of
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"subscribe" to x-request@gnupg.org, where x is the name of the
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mailing list (gnupg-announce, gnupg-users, etc.). See
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https://gnupg.org/documentation/mailing-lists.html for archives
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of the mailing lists.
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Please direct bug reports to [[https://bugs.gnupg.org]] or post them
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direct to the mailing list <gnupg-devel@gnupg.org>.
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Please direct questions about GnuPG to the users mailing list or one
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of the PGP newsgroups; please do not direct questions to one of the
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authors directly as we are busy working on improvements and bug
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fixes. The English and German mailing lists are watched by the
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authors and we try to answer questions when time allows us.
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Commercial grade support for GnuPG is available; for a listing of
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offers see https://gnupg.org/service.html . Maintaining and
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improving GnuPG requires a lot of time. Since 2001, g10 Code GmbH,
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a German company owned and headed by GnuPG's principal author Werner
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Koch, is bearing the majority of these costs. To keep GnuPG in a
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healthy state, they need your support.
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Please consider to donate at https://gnupg.org/donate/ .
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# This file is Free Software; as a special exception the authors gives
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# unlimited permission to copy and/or distribute it, with or without
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# modifications, as long as this notice is preserved. For conditions
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# of the whole package, please see the file COPYING. This file is
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# distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY, to the extent permitted by law; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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#
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# Local Variables:
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# mode:org
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# End:
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