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

### Chapter 4. Security

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# GPGME-1.15.1

## Introduction to GPGME

The GPGME package is a C library that allows cryptography support to be added to a program. It is designed to make access to public key crypto engines like GnuPG or GpgSM easier for applications. GPGME provides a high-level crypto API for encryption, decryption, signing, signature verification and key management.

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/gpgme/gpgme-1.15.1.tar.bz2

- Download (FTP): ftp://ftp.gnupg.org/gcrypt/gpgme/gpgme-1.15.1.tar.bz2

- Download MD5 sum: e086c4575fe4d7840864fb7dfe97f692

- Download size: 1.6 MB

- Estimated disk space required: 243 MB

- Estimated build time: 0.8 SBU (with parallelism=4; with all bindings, add 0.6 SBU for tests)

### GPGME Dependencies

#### Required

Libassuan-2.5.4

#### Optional

Doxygen-1.9.1 and Graphviz-2.44.1 (for API documentation), GnuPG-2.2.27 (required if Qt or SWIG are installed; used during the testsuite), Clisp-2.49, Python-2.7.18, Qt-5.15.2, and/or SWIG-4.0.2 (for language bindings)

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

## Installation of GPGME

Install GPGME by running the following commands:

    ./configure --prefix=/usr --disable-gpg-test &&
    make

To test the results, you should have GnuPG-2.2.27 installed and remove the --disable-gpg-test above. Issue: make -k check.

Now, as the `root` user:

    make install

## Command Explanations

`--disable-gpg-test`: if this parameter is not passed to configure, the test programs are built during make stage, which requires GnuPG-2.2.27. This parameter is not needed if GnuPG-2.2.27 is installed.

## Contents

Installed Program: gpgme-config, gpgme-json, and gpgme-tool
Installed Libraries: libgpgme, libgpgmepp.so, and libqgpgme.so
Installed Directory: /usr/include/{gpgme++,qgpgme,QGpgME}, /usr/lib/cmake/{Gpgmepp,QGpgme}. /usr/lib/python{2.7,3.9}/site-packages/gpg, and /usr/share/common-lisp/source/gpgme

### Short Descriptions

gpgme-config | is used to obtain GPGME compilation and linking information
gpgme-json | outputs GPGME commands in JSON format
gpgme-tool | is an assuan server exposing GPGME operations, such as printing fingerprints and keyids with keyservers
`libgpgme.so` | contains the GPGME API functions
`libgpgmepp.so` | contains the C++ GPGME API functions
`libqgpgme.so` | contains API functions for handling GPG operations in Qt applications

Last updated on 2021-02-19 22:13:48 -0800

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