#### Beyond Linux® From Scratch (systemd Edition) - Version 11.1

### Chapter 9. General Libraries

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# libgcrypt-1.10.0

## Introduction to libgcrypt

The libgcrypt package contains a general purpose crypto library based on the code used in GnuPG. The library provides a high level interface to cryptographic building blocks using an extendable and flexible API.

This package is known to build and work properly using an LFS-11.1 platform.

### Package Information

- Download (HTTP): https://www.gnupg.org/ftp/gcrypt/libgcrypt/libgcrypt-1.10.0.tar.bz2

- Download (FTP): ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.10.0.tar.bz2

- Download MD5 sum: 4faebf2c262af56ba4acfd68dd32440c

- Download size: 3.6 MB

- Estimated disk space required: 130 MB (with tests and pdf documentation)

- Estimated build time: 0.4 SBU (with documentation; add 0.5 SBU for tests)

### libgcrypt Dependencies

#### Required

libgpg-error-1.44

#### Optional

Pth-2.0.7 and texlive-20210325 (or install-tl-unx)

User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/libgcrypt

## Installation of libgcrypt

Install libgcrypt by running the following commands:

    ./configure --prefix=/usr &&
    make                      &&

    make -C doc html                                                       &&
    makeinfo --html --no-split -o doc/gcrypt_nochunks.html doc/gcrypt.texi &&
    makeinfo --plaintext       -o doc/gcrypt.txt           doc/gcrypt.texi

The above commands build the documentation in html and plaintext formats. If you wish to build alternate formats of the documentation, you need texlive-20210325 (or install-tl-unx). Issue the following command:

    make -C doc pdf ps

To test the results, issue: make check.

Now, as the `root` user:

    make install &&
    install -v -dm755   /usr/share/doc/libgcrypt-1.10.0 &&
    install -v -m644    README doc/{README.apichanges,fips*,libgcrypt*} \
                        /usr/share/doc/libgcrypt-1.10.0 &&

    install -v -dm755   /usr/share/doc/libgcrypt-1.10.0/html &&
    install -v -m644 doc/gcrypt.html/* \
                        /usr/share/doc/libgcrypt-1.10.0/html &&
    install -v -m644 doc/gcrypt_nochunks.html \
                        /usr/share/doc/libgcrypt-1.10.0      &&
    install -v -m644 doc/gcrypt.{txt,texi} \
                        /usr/share/doc/libgcrypt-1.10.0

If you built alternate formats of the documentation, install them by issuing the following command as the `root` user:

    install -v -m644 doc/gcrypt.{pdf,ps,dvi} \
                        /usr/share/doc/libgcrypt-1.10.0

## Command Explanations

`--with-capabilities`: This option enables libcap2 support. Note that this breaks cryptsetup-2.4.3

## Contents

Installed Programs: dumpsexp, hmac256, libgcrypt-config, and mpicalc
Installed Library: libgcrypt.so
Installed Directory: /usr/share/doc/libgcrypt-1.10.0

### Short Descriptions

dumpsexp | is a debug tool for S-expressions
hmac256 | is a standalone HMAC-SHA-256 implementation used to compute an HMAC-SHA-256 authentication code
libgcrypt-config | determines the compile and linker flags that should be used to compile and link programs that use `libgcrypt`
mpicalc | is a RPN (Reverse Polish Notation) calculator
`libgcrypt.so` | contains the cryptographic API functions

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