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The Libgcrypt Library
*********************

This manual is for Libgcrypt version 1.9.4 and was last updated 22
August 2021.  Libgcrypt is GNU's library of cryptographic building
blocks.

Copyright (C) 2000, 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2011, 2012
Free Software Foundation, Inc.
Copyright (C) 2012, 2013, 2016, 2017 g10 Code GmbH

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU General Public License as
     published by the Free Software Foundation; either version 2 of the
     License, or (at your option) any later version.  The text of the
     license can be found in the section entitled "GNU General Public
     License".

Introduction: What is Libgcrypt.
Preparation: What you should do before using the library.
Generalities: General library functions and data types.
Handler Functions: Working with handler functions.
Symmetric cryptography: How to use symmetric cryptography.
Public Key cryptography: How to use public key cryptography.
Hashing: How to use hash algorithms.
Message Authentication Codes: How to use MAC algorithms.
Key Derivation: How to derive keys from strings
Random Numbers: How to work with random numbers.
S-expressions: How to manage S-expressions.
MPI library: How to work with multi-precision-integers.
Prime numbers: How to use the Prime number related functions.
Utilities: Utility functions.
Tools: Utility tools.
Configuration: Configuration files and environment variables.
Architecture: How Libgcrypt works internally.

Appendices

Self-Tests: Description of the self-tests.
FIPS Mode: Description of the FIPS mode.
Library Copying: The GNU Lesser General Public License
Copying: The GNU General Public License says how you

Indices

Figures and Tables: Index of figures and tables.
Concept Index: Index of concepts and programs.
Function and Data Index: Index of functions, variables and data types.