EncryptionKeyGenerator

Pacchetto	mx.data.crypto
Classe	public class EncryptionKeyGenerator
Ereditarietà	EncryptionKeyGenerator Object

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Adobe Digital Enterprise Platform Data Services per Java EE 3.1

Versioni runtime:

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."

Proprietà pubbliche

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	Proprietà		Definito da
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object

Metodi pubblici

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	Metodo		Definito da
		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 Indica se per un oggetto è definita una proprietà specifica.	Object
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		validateStrongPassword(password:String):Boolean Checks a password and returns a value indicating whether the password is a "strong" password.	EncryptionKeyGenerator
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object

Costanti pubbliche

	Costante		Definito da
		ENCRYPTED_DB_PASSWORD_ERROR_ID : uint = 3138 [statico] 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

Descrizione della funzione di costruzione

Descrizione dei metodi

getEncryptionKey

()

metodo

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

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Adobe Digital Enterprise Platform Data Services per Java EE 3.1

Versioni runtime:

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.

Parametri

	`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.

Restituisce

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

Genera

	`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 (`""`)

Descrizione delle costanti

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EncryptionKeyGenerator - AS3 ADEP Data Services

Pacchettix

Elementi del linguaggio

Appendici

Pacchetto mx.data.crypto

getEncryptionKey

validateStrongPassword

ENCRYPTED_DB_PASSWORD_ERROR_ID