SafeNet Sentinel, Руководство разработчика

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Adding API Features
Sentinel Hardware Keys Developer’s Guide 99
Note: If you specify both the licensing controls—lease and limited executions—
the application will expire as soon as any of these limits is reached.
7. Selecting the Add instances later check box will allow you to add
new feature instances later in the License Manager screen. This
option helps in modifying the "licensing values" without modifying
the "licensing implementation" in the application/code.
For example, the programmer who implemented the application pro-
tection had set the expiration date as "10/10/05" and also selected
this check box. Later, if desired, the marketing/key programming per-
sonnel can modify it to suit some customer's requirement (such as,
10/10/07) and program the Sentinel Key. This does not require you
to apply the Shell protection again, modify the API calls, or repackage
the product.
8. Provide a name for this feature (necessary).
9. The constant name will be automatically generated. However, you
may modify it, if needed.
10. You may optionally provide comments. When done, click OK .
Note: You can use the following Business Layer API functions for an AES feature:
- SFNTQueryFeature - To implement the query-response protection with/
without the licensing checks.
- SFNTEncrypt - To encrypt 16-byte blocks.
- SFNTDecrypt - To decrypt 16-byte encrypted blocks.
Adding ECC Feature
1. In the License Designer screen, load the template to which the ECC
feature will be added.
2. Click the API tab.
3. Click Add . The Add Features dialog box appears.