Blackberry Java Development Environment 4.6.0 Руководство - Страница 28

Просмотреть онлайн или скачать pdf Руководство для Программное обеспечение Blackberry Java Development Environment 4.6.0. Blackberry Java Development Environment 4.6.0 36 страниц. Cryptographic smart card driver

Печатать страницу

Cryptographic Smart Card Driver Development Guide

Code sample: Enabling a CryptoToken object for RSA

operations using a private key

Example: MyRSACryptoToken.java

/**

* MyRSACryptoToken.java

package com.rim.samples.device.smartcard;

import net.rim.device.api.smartcard.*;

import net.rim.device.api.crypto.*;

import net.rim.device.api.crypto.keystore.*;

import net.rim.device.api.util.*;

import net.rim.device.api.crypto.certificate.x509.*;

import net.rim.device.api.crypto.certificate.*;

import net.rim.device.api.crypto.asn1.*;

import net.rim.device.api.compress.*;

import net.rim.device.api.i18n.*;

/**

* This class describes an implmentation of an RSA cryptographic token.

* The RIM Crypto API will use this object to perform a private key RSA operation.

* This object should delegate the operation to the smart card.

final class MyRSACryptoToken extends RSACryptoToken implements Persistable

{

private static final String DECRYPT_DESC = "The private key will be used to decrypt

encrypted data.";

private static final String SIGN_DESC = "The private key will be used to generate a

digital signature.";

/**

* Constructs a new MyRSACryptoToken object.

MyRSACryptoToken()

{

}

/**

* Determine if this token does the user authentication for the system.

* If not the KeyStore will prompt for the key store password when the user

* tries to access the private key.

* @return True if this token will prompt for the necessary

* user authentication when private key access is requested.

public boolean providesUserAuthentication()

{

return true;

}