Package org.cryptacular.bean

Class SimpleHashBean

java.lang.Object

org.cryptacular.bean.AbstractHashBean

org.cryptacular.bean.SimpleHashBean

All Implemented Interfaces:

HashBean<byte[]>

public class SimpleHashBean
extends AbstractHashBean
implements HashBean<byte[]>

Computes a hash using an instance of Digest specified by AbstractHashBean.getDigestSpec().

Author:

Middleware Services

Constructor Summary

Constructors

Constructor	Description
SimpleHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec)	Creates a new simple hash bean.
SimpleHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec, int iterations)	Creates a new simple hash bean.

Method Summary

Modifier and Type	Method	Description
boolean	compare(byte[] hash, Object... data)	Compares a known hash value with the hash of the given data.
byte[]	hash(Object... data)	Hashes the given data.

Methods inherited from class org.cryptacular.bean.AbstractHashBean

compareInternal, getDigestSpec, getIterations, hashInternal

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SimpleHashBean

public SimpleHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec)

Creates a new simple hash bean.

Parameters:

digestSpec - Digest specification.

SimpleHashBean

public SimpleHashBean(Spec<org.bouncycastle.crypto.Digest> digestSpec,
 int iterations)

Creates a new simple hash bean.

Parameters:

digestSpec - Digest specification.

iterations - Number of hash rounds.

Method Details

hash

public byte[] hash(Object... data)
            throws CryptoException,
StreamException

Description copied from interface: HashBean

Hashes the given data.

Specified by:

hash in interface HashBean<byte[]>

Parameters:

data - Data to hash. Callers should expect support for at least the following types: byte[], CharSequence, InputStream, and Resource. Unless otherwise noted, character data is processed in the UTF-8 character set; if another character set is desired, the caller should convert to byte[] and provide the resulting bytes.

Returns:

Digest output.

Throws:

CryptoException - on hash computation errors.

StreamException - on stream IO errors.

compare

public boolean compare(byte[] hash,
 Object... data)
                throws CryptoException,
StreamException

Compares a known hash value with the hash of the given data.

Specified by:

compare in interface HashBean<byte[]>

Parameters:

hash - Known hash value. If the length of the array is greater than the length of the digest output, anything beyond the digest length is considered salt data that is hashed after the input data.

data - Data to hash.

Returns:

True if the hashed data matches the given hash, false otherwise.

Throws:

CryptoException - on hash computation errors.

StreamException - on stream IO errors.