Added Encryptor interface for symmetric encryption esp. targeting SealedObject

- This will allow a keystore to be checked in (.keystore) and specified by installer
   - Algorithm parameters embedded in SealedObject but also supported by other Cipher methods
   ALF-8646: RINF 38: Text data encryption
   ALF-8956: RINF 38: Encryption key password specified by installer
   ALF-9055: RINF 38: Support encryption against existing data


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@28438 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/security/authentication/BasicPasswordGenerator.java

@@ -49,4 +49,12 @@ public class BasicPasswordGenerator implements PasswordGenerator
     {
         return RandomStringUtils.randomAlphanumeric(passwordLength);
     }
+    
+    public static void main(String ... args)
+    {
+        BasicPasswordGenerator pwdGen = new BasicPasswordGenerator();
+        pwdGen.setPasswordLength(10);
+        
+        System.out.println("A password: " + pwdGen.generatePassword());
+    }
 }