Package gnu.crypto.hash

Provides a basic API for using message digest algorithms.

See:
Description

Interface Summary

IMessageDigest

The basic visible methods of any hash algorithm.

Class Summary

BaseHash	A base abstract class to facilitate hash implementations.
HashFactory	A Factory to instantiate message digest algorithm instances.
Haval	The HAVAL message-digest algorithm is a variable output length, with variable number of rounds.
MD2	An implementation of the MD2 message digest algorithm.
MD4	An implementation of Ron Rivest's MD4 message digest algorithm.
MD5	The MD5 message-digest algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input.
RipeMD128	RIPEMD-128 is a 128-bit message digest.
RipeMD160	RIPEMD-160 is a 160-bit message digest.
Sha160	The Secure Hash Algorithm (SHA-1) is required for use with the Digital Signature Algorithm (DSA) as specified in the Digital Signature Standard (DSS) and whenever a secure hash algorithm is required for federal applications.
Sha256	Implementation of SHA2-1 [SHA-256] per the IETF Draft Specification.
Sha384	Implementation of SHA2-2 [SHA-384] per the IETF Draft Specification.
Sha512	Implementation of SHA2-3 [SHA-512] per the IETF Draft Specification.
Tiger	The Tiger message digest.
Whirlpool	Whirlpool, a new 512-bit hashing function operating on messages less than 2 ** 256 bits in length.

Package gnu.crypto.hash Description

Provides a basic API for using message digest algorithms.

Package overview

Message digests, or one-way hash functions, generate fixed-sized signatures from variable-sized texts, in such a way that it is computationally infeasible to determine the source text from the signature or to find a different text that hashes to the same signature.

The following diagram shows the important classes participating in this package:

Here is a simple example of how to use the SHA-1 hash.

IMessageDigest md = HashFactory.getInstance("SHA-1");
md.update(input, 0, input.length);
byte[] digest = md.digest();