#### Beyond Linux® From Scratch (systemd Edition) - Version 10.1

### Chapter 4. Security

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# GnuPG-2.2.27

## Introduction to GnuPG

The GnuPG package is GNU's 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 RFC2440 and the S/MIME standard as described by several RFCs. GnuPG 2 is the stable version of GnuPG integrating support for OpenPGP and S/MIME.

This package is known to build and work properly using an LFS-10.1 platform.

### Package Information

- Download (HTTP): https://www.gnupg.org/ftp/gcrypt/gnupg/gnupg-2.2.27.tar.bz2

- Download (FTP): ftp://ftp.gnupg.org/gcrypt/gnupg/gnupg-2.2.27.tar.bz2

- Download MD5 sum: a9c002b5356103c97412955a1956ae0c

- Download size: 6.9 MB

- Estimated disk space required: 156 MB (with all tests; add 24 MB for docs)

- Estimated build time: 0.4 SBU (using parallelism=4; add 1.6 SBU for tests)

### GnuPG 2 Dependencies

#### Required

Libassuan-2.5.4, libgcrypt-1.9.2, Libksba-1.5.0, and npth-1.6

#### Recommended

pinentry-1.1.1 (Run-time requirement for most of the package's functionality)

#### Optional

cURL-7.75.0, Fuse-3.10.2, GnuTLS-3.7.0, ImageMagick-7.0.11-0 (for the convert utility, used for generating the documentation), libusb-1.0.24, an MTA, OpenLDAP-2.4.57, SQLite-3.34.1, texlive-20200406 (or install-tl-unx), fig2dev (for generating documentation), and GNU adns

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/gnupg2

## Installation of GnuPG

By default GnuPG doesn't install the deprecated gpg-zip script, but it is still needed by some programs. Make GnuPG install it with:

    sed -e '/noinst_SCRIPTS = gpg-zip/c sbin_SCRIPTS += gpg-zip' \
        -i tools/Makefile.in

Install GnuPG by running the following commands:

    ./configure --prefix=/usr            \
                --localstatedir=/var     \
                --docdir=/usr/share/doc/gnupg-2.2.27 &&
    make &&

    makeinfo --html --no-split -o doc/gnupg_nochunks.html doc/gnupg.texi &&
    makeinfo --plaintext       -o doc/gnupg.txt           doc/gnupg.texi &&
    make -C doc html

If you have texlive-20200406 installed and you wish to create documentation in alternate formats, issue the following commands (fig2dev is needed for the ps format):

    make -C doc pdf ps

To test the results, issue: make check.

Note that if you have already installed GnuPG, the instructions below will overwrite `/usr/share/man/man1/gpg-zip.1`. Now, as the `root` user:

    make install &&

    install -v -m755 -d /usr/share/doc/gnupg-2.2.27/html            &&
    install -v -m644    doc/gnupg_nochunks.html \
                        /usr/share/doc/gnupg-2.2.27/html/gnupg.html &&
    install -v -m644    doc/*.texi doc/gnupg.txt \
                        /usr/share/doc/gnupg-2.2.27 &&
    install -v -m644    doc/gnupg.html/* \
                        /usr/share/doc/gnupg-2.2.27/html

If you created alternate formats of the documentation, install them using the following command as the `root` user:

    install -v -m644 doc/gnupg.{pdf,dvi,ps} \
                     /usr/share/doc/gnupg-2.2.27

## Command Explanations

sed ... tools/Makefile.in: This command is needed to build the gpg-zip program.

`--docdir=/usr/share/doc/gnupg-2.2.27`: This switch changes the default docdir to `/usr/share/doc/gnupg-2.2.27`.

`--enable-all-tests`: allows more tests to be run with make check.

`--enable-g13`: This switch enables building the g13 program.

## Contents

Installed Programs: addgnupghome, applygnupgdefaults, dirmngr, dirmngr-client, g13 (optional), gpg-agent, gpg-connect-agent, gpg, gpgconf, gpgparsemail, gpgscm, gpgsm, gpgsplit, gpgtar, gpgv, gpg-wks-server, gpg-zip, kbxutil, and watchgnupg
Installed Libraries: None
Installed Directories: /usr/share/doc/gnupg-2.2.27 and /usr/share/gnupg

### Short Descriptions

addgnupghome | is used to create and populate a user's `~/.gnupg` directories
applygnupgdefaults | is a wrapper script used to run gpgconf with the `--apply-defaults` parameter on all user's GnuPG home directories
dirmngr | is a tool that takes care of accessing the OpenPGP keyservers
dirmngr-client | is a tool to contact a running dirmngr and test whether a certificate has been revoked
g13 | is a tool to create, mount or unmount an encrypted file system container (optional)
gpg-agent | is a daemon used to manage secret (private) keys independently from any protocol. It is used as a backend for gpg2 and gpgsm as well as for a couple of other utilities
gpg-connect-agent | is a utility used to communicate with a running gpg-agent
gpg | is the OpenPGP part of the GNU Privacy Guard (GnuPG). It is a tool used to provide digital encryption and signing services using the OpenPGP standard
gpgconf | is a utility used to automatically and reasonably safely query and modify configuration files in the `~/.gnupg` home directory. It is designed not to be invoked manually by the user, but automatically by graphical user interfaces
gpgparsemail | is a utility currently only useful for debugging. Run it with `--help` for usage information
gpgscm | executes the given scheme program or spawns an interactive shell
gpgsm | is a tool similar to gpg2 used to provide digital encryption and signing services on X.509 certificates and the CMS protocol. It is mainly used as a backend for S/MIME mail processing
gpgsplit | splits an OpenPGP message into packets
gpgtar | is a tool to encrypt or sign files into an archive
gpgv | is a verify only version of gpg2
gpg-wks-server | provides a server for the Web Key Service protocol
gpg-zip | encrypts or signs files into an archive
kbxutil | is used to list, export and import Keybox data
watchgnupg | is used to listen to a Unix Domain socket created by any of the GnuPG tools

Last updated on 2021-02-21 17:43:43 -0800

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