uk.ac.ed.epcc.webapp.session

Enum Hash

java.lang.Object

java.lang.Enum<Hash>

uk.ac.ed.epcc.webapp.session.Hash

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<Hash>

public enum Hash
extends java.lang.Enum<Hash>

Enum of possible password hash algorithms When stored in the database we can use numeric codes to avoid making the algorithm used too explicit if data is exposed. Note the Enum.toString() method should return the standard name used to retrieve the

Enum Constant Summary

Enum Constants

Enum Constant and Description
LOCKED
MD5
SHA1
SHA256
SHA384
SHA512

Method Summary

Modifier and Type	Method and Description
boolean	deprecatedByDefault()
boolean	enableByDefault()
static Hash	getDefault(AppContext c)
java.security.MessageDigest	getDigest()
java.lang.String	getHash(java.lang.String value) get a hash value encoded as a hexadecimal string (for compatibility with mysql built in hash functions).
static java.lang.String	getHex(byte[] bytes)
boolean	isDeprecated(AppContext conn) Is this an insecure hash that needs to be replaced
boolean	isEnabled(AppContext conn) Can this hash value be used to login
int	size()
static Hash	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static Hash[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

MD5

public static final Hash MD5

SHA1

public static final Hash SHA1

SHA256

public static final Hash SHA256

SHA384

public static final Hash SHA384

SHA512

public static final Hash SHA512

LOCKED

public static final Hash LOCKED

Method Detail

values

public static Hash[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Hash c : Hash.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Hash valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

getDigest

public java.security.MessageDigest getDigest()
                                      throws java.security.NoSuchAlgorithmException

Throws:

java.security.NoSuchAlgorithmException

getHash

public java.lang.String getHash(java.lang.String value)
                         throws java.security.NoSuchAlgorithmException

get a hash value encoded as a hexadecimal string (for compatibility with mysql built in hash functions).

Parameters:

value -

Returns:

hex coded hash string

Throws:

java.security.NoSuchAlgorithmException

getHex

public static java.lang.String getHex(byte[] bytes)

size

public int size()

enableByDefault

public boolean enableByDefault()

deprecatedByDefault

public boolean deprecatedByDefault()

isEnabled

public boolean isEnabled(AppContext conn)

Can this hash value be used to login

Parameters:

conn -

Returns:

isDeprecated

public boolean isDeprecated(AppContext conn)

Is this an insecure hash that needs to be replaced

Parameters:

conn -

Returns:

getDefault

public static Hash getDefault(AppContext c)