ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with local SQL databases in AIR
import flash.data.SQLConnection;
import flash.data.SQLMode;
import flash.filesystem.File;
var conn:SQLConnection = new SQLConnection();
var dbFile:File = File.applicationStorageDirectory.resolvePath("DBSample.db");
var encryptionKey:ByteArray = new ByteArray();
encryptionKey.writeUTFBytes("Some16ByteString"); // This technique is not secure!
try
{
conn.open(dbFile, SQLMode.UPDATE, false, 1024, encryptionKey);
trace("the database was created successfully");
}
catch (error:SQLError)
{
if (error.errorID == 3138)
{
trace("Incorrect encryption key");
}
else
{
trace("Error message:", error.message);
trace("Details:", error.details);
}
}
For an example demonstrating a recommended way to generate an encryption key, see “Example: Generating and
using an encryption key” on page 762.
Changing the encryption key of a database
Adobe AIR 1.5 and later
When a database is encrypted, you can change the encryption key for the database at a later time. To change a
database’s encryption key, first open a connection to the database by creating a SQLConnection instance and calling
its open() or openAsync() method. Once the database is connected, call the reencrypt() method, passing the new
encryption key as an argument.
Like most database operations, the reencrypt() method’s behavior varies depending on whether the database
connection uses synchronous or asynchronous execution mode. If you use the open() method to connect to the
database, the reencrypt() operation runs synchronously. When the operation finishes, execution continues with the
next line of code:
var newKey:ByteArray = new ByteArray();
// ... generate the new key and store it in newKey
conn.reencrypt(newKey);
On the other hand, if the database connection is opened using the openAsync() method, the reencrypt() operation
is asynchronous. Calling reencrypt() begins the reencryption process. When the operation completes, the
SQLConnection object dispatches a reencrypt event. You use an event listener to determine when the reencryption
finishes:
Last updated 6/6/2012
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