EncryptionKeyGenerator

Pakket	mx.data.crypto
Klasse	public class EncryptionKeyGenerator
Overerving	EncryptionKeyGenerator Object

Taalversie:

ActionScript 3.0

Productversie:

Adobe Digital Enterprise Platform Data Services for Java EE 3.1

Runtimeversies:

Flash Player 9, AIR 1.1

The EncryptionKeyGenerator class generates an encryption key value, such as you would use to encrypt files or data. For example, the encryption key is suitable to use as an encryption key for an encrypted AIR local SQL (SQLite) database.

This class uses techniques and algorithms that are designed for maximum data privacy and security. Use this class to generate an encryption key if your application requires data to be encrypted on a per-user level (in other words, if only one user of the application should be able to access his or her data). In some situations you may also want to use per-user encryption for data even if the application design specifies that other users can access the data. For more information, see "Considerations for using encryption with a database" in the guide "Developing Adobe AIR Applications with Flex."

The generated encryption key is based on a password that you provide. For any given password, in the same AIR application running in the same user account on the same machine, the encryption key result is the same.

To generate an encryption key from a password, use the getEncryptionKey() method. To confirm that a password is a "strong" password before calling the getEncryptionKey() method, use the validateStrongPassword() method.

In addition, the EncryptionKeyGenerator includes a utility constant, ENCRYPTED_DB_PASSWORD_ERROR_ID. This constant matches the error ID of the SQLError error that occurs when code that is attempting to open an encrypted database provides the wrong encryption key.

This class is designed to create an encryption key suitable for providing the highest level of data privacy and security. In order to achieve that level of security, a few security principles must be followed:

Your application should never store the user-entered password
Your application should never store the encryption key returned by the getEncryptionKey() method.
Instead, each time the user runs the application and attempts to access the database, your application code should call the getEncryptionKey() method to regenerate the encryption key.

For more information about data security, and an explanation of the security techniques used in the EncryptionKeyGenerator class, see "Example: Generating and using an encryption key" in the guide "Developing Adobe AIR Applications with Flex."

Openbare eigenschappen

Overerfde openbare eigenschappen verbergen

Overerfde openbare eigenschappen weergeven

	Eigenschap		Gedefinieerd door
		constructor : Object Verwijzing naar het klasseobject of de constructorfunctie van een bepaalde objectinstantie.	Object

Openbare methoden

Overerfde openbare methoden verbergen

Overerfde openbare methoden weergeven

	Methode		Gedefinieerd door
		EncryptionKeyGenerator() Creates a new EncryptionKeyGenerator instance.	EncryptionKeyGenerator
		getEncryptionKey(password:String, overrideSaltELSKey:String = null):ByteArray Uses a password to generate a 16-byte encryption key.	EncryptionKeyGenerator
		hasOwnProperty(name:String):Boolean Geeft aan of voor een object een opgegeven eigenschap is gedefinieerd.	Object
		isPrototypeOf(theClass:Object):Boolean Geeft aan of een instantie van de klasse Object zich in de prototypeketen van het object bevindt dat als parameter is opgegeven.	Object
		propertyIsEnumerable(name:String):Boolean Geeft aan of de opgegeven eigenschap bestaat en kan worden opgesomd.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Stelt de beschikbaarheid van een dynamische eigenschap voor lusbewerkingen in.	Object
		toLocaleString():String Geeft de tekenreeksweergave van dit object weer, geformatteerd volgens de locatiespecifieke conventies.	Object
		toString():String Retourneert een tekenreeksrepresentatie van het opgegeven object.	Object
		validateStrongPassword(password:String):Boolean Checks a password and returns a value indicating whether the password is a "strong" password.	EncryptionKeyGenerator
		valueOf():Object Retourneert de primitieve waarde van het opgegeven object.	Object

Openbare constanten

	Constante		Gedefinieerd door
		ENCRYPTED_DB_PASSWORD_ERROR_ID : uint = 3138 [statisch] This constant matches the error ID (3138) of the SQLError error that occurs when code that is attempting to open an encrypted database provides the wrong encryption key.	EncryptionKeyGenerator

Constructordetails

Methodedetails

getEncryptionKey

()

methode

public function getEncryptionKey(password:String, overrideSaltELSKey:String = null):ByteArray

Taalversie:

ActionScript 3.0

Productversie:

Adobe Digital Enterprise Platform Data Services for Java EE 3.1

Runtimeversies:

Flash Player 9, AIR 1.1

Uses a password to generate a 16-byte encryption key. The return value is suitable to use as an encryption key for an encrypted AIR local SQL (SQLite) database.

For any given password, calling the getEncryptionKey() method from the same AIR application running in the same user account on the same machine, the encryption key result is the same.

This method is designed to create an encryption key suitable for providing the highest level of data privacy and security. In order to achieve that level of security, your application must follow several security principles:

Your application can never store the user-entered password
Your application can never store the encryption key returned by the getEncryptionKey() method.
Instead, each time the user runs the application and attempts to access the database, call the getEncryptionKey() method to regenerate the encryption key.

Parameters

	`password:String` — The password to use to generate the encryption key.

	`overrideSaltELSKey:String` (default = `null`) — The EncryptionKeyGenerator creates and stores a random value (known as a salt) as part of the process of generating the encryption key. The first time an application calls the `getEncryptionKey()` method, the salt value is created and stored in the AIR application's encrypted local store (ELS). From then on, the salt value is loaded from the ELS. If you wish to provide a custom String ELS key for storing the salt value, specify a value for the `overrideSaltELSKey` parameter. If the parameter is `null` (the default) a default key name is used.

Geretourneerde waarde

ByteArray — The generated encryption key, a 16-byte ByteArray object.

Gegenereerde uitzondering

	`ArgumentError` — If the specified password is not a "strong" password according to the criteria explained in the `validateStrongPassword()` method description

	`ArgumentError` — If a non-`null` value is specified for the `overrideSaltELSKey` parameter, and the value is an empty String (`""`)

Constantedetails

Juridische kennisgeving | Online privacybeleid

EncryptionKeyGenerator - AS3 ADEP Data Services

Pakkettenx

Taalelementen

Bijlagen

Pakket mx.data.crypto

getEncryptionKey

validateStrongPassword

ENCRYPTED_DB_PASSWORD_ERROR_ID