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# GNU cryptographic primitives and tools
API Documentation, version 2.0.0

GNU Crypto provides cryptographic primitives and tools in Java.

See:
Description

Algorithms
gnu.crypto |
gnu.crypto.cipher | Provides a basic API for using symetric-key block cipher algorithms.
gnu.crypto.hash | Provides a basic API for using message digest algorithms.
gnu.crypto.mac | Provides a basic API for using Message Authentication Code (MAC) algorithms.
gnu.crypto.mode | Provides a basic API for using block cipher Modes of Operation.
gnu.crypto.pad | Provides a basic API for using block cipher padding algorithms.
gnu.crypto.prng | Provides a basic API for using cryptographically strong pseudo random number generation algorithms.

High-Level API
gnu.crypto.assembly | Provides a high-level API for combining and using GNU Crypto cipher, mode, and padding primitives.

Key Agreements and Key Pair Generation
gnu.crypto.key | Provides a basic API for algorithms to generate Public/Private keypairs, and Key Agreement schemes.
gnu.crypto.key.dh |
gnu.crypto.key.dss |
gnu.crypto.key.rsa |
gnu.crypto.key.srp6 |
gnu.crypto.keyring | Provides a basic API for managing private and public authentication credentials stored in file objects.

Signature Schemes
gnu.crypto.sig | Provides a basic API for algorithms to use Public/Private keypairs in Digital Signature schemes.
gnu.crypto.sig.dss |
gnu.crypto.sig.rsa |

Java Cryptography Extension (JCE) Adapters
gnu.crypto.jce |
gnu.crypto.jce.cipher |
gnu.crypto.jce.hash |
gnu.crypto.jce.keyring |
gnu.crypto.jce.mac |
gnu.crypto.jce.params |
gnu.crypto.jce.prng |
gnu.crypto.jce.sig |
gnu.crypto.jce.spec |

Experimental Algorithms
gnu.crypto.exp.ust |

Simple Authentication and Security Layer
gnu.crypto.sasl | Provides concrete implementations of some SASL (Simple Authentication and Security Layer) mechanisms.
gnu.crypto.sasl.anonymous |
gnu.crypto.sasl.crammd5 |
gnu.crypto.sasl.plain |
gnu.crypto.sasl.srp | Provides the implementations of the SASL SRP mechanism, as specified in draft-burdis-cat-srp-sasl.

Tools
gnu.crypto.tool |

Utilities
gnu.crypto.util |

Standard APIs
javax.crypto |
javax.crypto.interfaces |
javax.crypto.spec |
javax.security.auth.callback |
javax.security.sasl |

GNU Crypto provides cryptographic primitives and tools in Java.

IN HOC SIGNO TECTIS

### Introduction

GNU Crypto, part of the GNU project, released under the aegis of GNU, aims at providing free, versatile, high-quality, and provably correct implementations of cryptographic primitives and tools in the Java programming language for use by programmers and end-users.

GNU Crypto is licensed under the terms of the GNU General Public License, with the "library exception" which permits its use as a library in conjunction with non-Free software:

> As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

The effect of that license is similar to using the LGPL, except that static linking is permitted. GPL with that exception is sometimes called the Guile License, because the Guile implementation of Scheme (for embedding) uses this license.

### Downloads

You can download the latest software from ftp.gnupg.org/gcrypt/gnu-crypto. You'll probably want to use one of the FTP mirror sites, although the mirrors may not be current (most are synchronised daily).

Up-to-date source code for this project is available in the gnu-crypto module through CVS.

### Trademarks

All trademarks and registered trademarks are the property of their respective owner(s).

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Copyright © 2001, 2002, 2003, 2004 Free Software Foundation, Inc.