| 套件 | mx.data.crypto |
| 類別 | public class EncryptionKeyGenerator |
| 繼承 | EncryptionKeyGenerator  Object |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3.1 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
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."
隱藏繼承公用屬性
顯示繼承公用屬性| 方法 | 定義自 | ||
|---|---|---|---|
Creates a new EncryptionKeyGenerator instance. | EncryptionKeyGenerator | ||
Uses a password to generate a 16-byte encryption key. | EncryptionKeyGenerator | ||
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指出物件是否有已定義的指定屬性。 | Object | |
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指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。 | Object | |
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指出指定的屬性是否存在，以及是否可列舉。 | Object | |
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為迴圈作業設定動態屬性的可用性。 | Object | |
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傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
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會傳回指定之物件的字串形式。 | Object | |
Checks a password and returns a value indicating whether the password is a "strong"
password. | EncryptionKeyGenerator | ||
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會傳回指定之物件的基本值。 | Object | |
| 常數 | 定義自 | ||
|---|---|---|---|
| ENCRYPTED_DB_PASSWORD_ERROR_ID : uint = 3138 [靜態]
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 | ||
EncryptionKeyGenerator | () | 建構函式 |
public function EncryptionKeyGenerator()| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3.1 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Creates a new EncryptionKeyGenerator instance.
getEncryptionKey | () | 方法 |
public function getEncryptionKey(password:String, overrideSaltELSKey:String = null):ByteArray| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3.1 |
| 執行階段版本: | 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.
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."
參數
password:String — The password to use to generate the encryption key.
| |
overrideSaltELSKey:String (default = null)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 |
ByteArray — The generated encryption key, a 16-byte ByteArray object.
|
擲回值
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 ("")
|
validateStrongPassword | () | 方法 |
public function validateStrongPassword(password:String):Boolean| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3.1 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Checks a password and returns a value indicating whether the password is a "strong" password. The criteria for a strong password are:
- Minimum 8 characters
- Maxmium 32 characters
- Contains at least one lowercase letter
- Contains at least one uppercase letter
- Contains at least one number or symbol character
參數
password:String — The password to check
|
Boolean — A value indicating whether the password is a strong password (true)
or not (false).
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ENCRYPTED_DB_PASSWORD_ERROR_ID | 常數 |
public static const ENCRYPTED_DB_PASSWORD_ERROR_ID:uint = 3138| 語言版本: | ActionScript 3.0 |
| 產品版本: | Adobe Digital Enterprise Platform Data Services for Java EE 3.1 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
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.
Tue Jun 12 2018, 03:47 PM Z