org.owasp.esapi.reference.crypto

Class ReferenceEncryptedProperties

java.lang.Object

java.util.Dictionary<K,V>

java.util.Hashtable<Object,Object>

java.util.Properties

org.owasp.esapi.reference.crypto.ReferenceEncryptedProperties

All Implemented Interfaces:

Serializable, Cloneable, Map<Object,Object>, EncryptedProperties

public class ReferenceEncryptedProperties
extends Properties
implements EncryptedProperties

Reference implementation of the EncryptedProperties interface. This implementation wraps a normal properties file, and creates surrogates for the getProperty and setProperty methods that perform encryption and decryption based on Encryptor.

This implementation differs from DefaultEncryptedProperties in that it actually extends from java.util.Properties for applications that need an instance of that class. In order to do so, the getProperty and setProperty methods were modified to throw EncryptionRuntimeException instead of EncryptionException.

Since:

October 8, 2010

Author:

August Detlefsen (augustd at codemagi dot com) CodeMagi, Inc., kevin.w.wall@gmail.com

See Also:

EncryptedProperties, DefaultEncryptedProperties, Serialized Form

Field Summary

Fields inherited from class java.util.Properties

defaults

Constructor Summary

Constructors

Constructor and Description
ReferenceEncryptedProperties() Instantiates a new encrypted properties.
ReferenceEncryptedProperties(Properties defaults)

Method Summary

Methods

Modifier and Type	Method and Description
Enumeration	elements() This method has been overridden to throw an UnsupportedOperationException
Set	entrySet() This method has been overridden to throw an UnsupportedOperationException
String	getProperty(String key) Gets the property value from the encrypted store, decrypts it, and returns the plaintext value to the caller.
String	getProperty(String key, String defaultValue)
void	list(PrintStream out) This method has been overridden to throw an UnsupportedOperationException
void	list(PrintWriter out) This method has been overridden to throw an UnsupportedOperationException
void	load(InputStream in) Reads a property list (key and element pairs) from the input stream.
void	load(Reader in) For JDK 1.5 compatibility, this method has been overridden convert the Reader into an InputStream and call the superclass constructor.
Object	put(Object key, Object value) This method has been overridden to only accept Strings for key and value, and to encrypt those Strings before storing them.
String	setProperty(String key, String value) Encrypts the plaintext property value and stores the ciphertext value in the encrypted store.
String	toString() This method has been overridden to not print out the keys and values stored in this properties file.
Collection	values() This method has been overridden to throw an UnsupportedOperationException

Methods inherited from class java.util.Properties

loadFromXML, propertyNames, save, store, store, storeToXML, storeToXML, stringPropertyNames

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, equals, get, hashCode, isEmpty, keys, keySet, putAll, rehash, remove, size

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.owasp.esapi.EncryptedProperties

keySet, store

Constructor Detail

ReferenceEncryptedProperties

public ReferenceEncryptedProperties()

Instantiates a new encrypted properties.

ReferenceEncryptedProperties

public ReferenceEncryptedProperties(Properties defaults)

Method Detail

getProperty

public String getProperty(String key)
                   throws EncryptionRuntimeException

Gets the property value from the encrypted store, decrypts it, and returns the plaintext value to the caller.

Specified by:

getProperty in interface EncryptedProperties

Overrides:

getProperty in class Properties

Parameters:

key - the name of the property to get

Returns:

The decrypted property value. null if the key is not set.

Throws:

EncryptionRuntimeException - Thrown if decryption fails.

getProperty

public String getProperty(String key,
                 String defaultValue)
                   throws EncryptionRuntimeException

Overrides:

getProperty in class Properties

Throws:

EncryptionRuntimeException - Thrown if decryption fails.

setProperty

public String setProperty(String key,
                 String value)
                   throws EncryptionRuntimeException

Encrypts the plaintext property value and stores the ciphertext value in the encrypted store.

Specified by:

setProperty in interface EncryptedProperties

Overrides:

setProperty in class Properties

Parameters:

key - the name of the property to set

value - the value of the property to set

Returns:

the previously encrypted property value for the specified key, or null if it did not have one.

Throws:

EncryptionRuntimeException - Thrown if encryption fails.

load

public void load(InputStream in)
          throws IOException

Reads a property list (key and element pairs) from the input stream.

Specified by:

load in interface EncryptedProperties

Overrides:

load in class Properties

Parameters:

in - the input stream that contains the properties file

Throws:

IOException - Thrown if input stream invalid or does not correspond to Java properties file format.

load

public void load(Reader in)
          throws IOException

For JDK 1.5 compatibility, this method has been overridden convert the Reader into an InputStream and call the superclass constructor.

Overrides:

load in class Properties

Throws:

IOException - Thrown if Reader input stream invalid or does not correspond to Java properties file format.

list

public void list(PrintStream out)

This method has been overridden to throw an UnsupportedOperationException

Overrides:

list in class Properties

list

public void list(PrintWriter out)

This method has been overridden to throw an UnsupportedOperationException

Overrides:

list in class Properties

values

public Collection values()

This method has been overridden to throw an UnsupportedOperationException

Specified by:

values in interface Map<Object,Object>

Overrides:

values in class Hashtable<Object,Object>

entrySet

public Set entrySet()

This method has been overridden to throw an UnsupportedOperationException

Specified by:

entrySet in interface Map<Object,Object>

Overrides:

entrySet in class Hashtable<Object,Object>

elements

public Enumeration elements()

This method has been overridden to throw an UnsupportedOperationException

Overrides:

elements in class Hashtable<Object,Object>

put

public Object put(Object key,
         Object value)

This method has been overridden to only accept Strings for key and value, and to encrypt those Strings before storing them. Outside classes should always use setProperty to add values to the Properties map. If an outside class does erroneously call this method with non-String parameters an IllegalArgumentException will be thrown.

Specified by:

put in interface Map<Object,Object>

Overrides:

put in class Hashtable<Object,Object>

Parameters:

key - A String key to add

value - A String value to add

Returns:

The old value associated with the specified key, or null if the key did not exist.

toString

public String toString()

This method has been overridden to not print out the keys and values stored in this properties file.

Overrides:

toString in class Hashtable<Object,Object>

Returns:

The minimal String representation of this class, as per java.lang.Object.