net.spy.util
Class Digest

java.lang.Object
  net.spy.SpyObject
      net.spy.util.Digest

public class Digest
extends SpyObject

Digest for getting checksums, hashing passwords, stuff like that.

Constructor Summary

Digest()
Get a new Digest object.

Digest(java.lang.String alg)
Get a Digest object with the given hash algorithm.

Method Summary

boolean	checkPassword(java.lang.String pw, java.lang.String hash) Check a plaintext password against a hashed password.
java.lang.String	getHash(java.lang.String word) Get a hash for a given String.
protected java.lang.String	getHash(java.lang.String word, byte[] salt) Get a hash for a String with a known salt.
java.lang.String	getHashAlg() Get the hash type to be used by this password digest thing.
java.lang.String	getSaltFreeHash(java.lang.String s) Get a hash for a String with no salt.
byte[]	getSaltFreeHashBytes(java.lang.String s) Get the hash for a given string (with no salt).
void	prefixHash(boolean doit) If set to true, hashes will be prefixed with the type of hash used.

Methods inherited from class net.spy.SpyObject

getLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

Digest

public Digest()

Get a new Digest object.

Digest

public Digest(java.lang.String alg)

Get a Digest object with the given hash algorithm.

Method Detail

getHashAlg

public java.lang.String getHashAlg()

Get the hash type to be used by this password digest thing.

prefixHash

public void prefixHash(boolean doit)

If set to true, hashes will be prefixed with the type of hash used. (i.e. {SHA}, {SSHA}, etc...).

Parameters:

doit - whether or not to prefix the hash

checkPassword

public boolean checkPassword(java.lang.String pw,
                             java.lang.String hash)

Check a plaintext password against a hashed password.

getHash

protected java.lang.String getHash(java.lang.String word,
                                   byte[] salt)

Get a hash for a String with a known salt. This should only be used for verification, don't be stupid and start handing out words with static salts.

getSaltFreeHashBytes

public byte[] getSaltFreeHashBytes(java.lang.String s)

Get the hash for a given string (with no salt).

Parameters:

s - the thing to hash

Returns:

the hash

getSaltFreeHash

public java.lang.String getSaltFreeHash(java.lang.String s)

Get a hash for a String with no salt. This should only be used for checksumming, not passwords.

getHash

public java.lang.String getHash(java.lang.String word)

Get a hash for a given String.