插入USB-KEY， 想通过HttpClient来向服务器发送https请求。现在厂商已提供的USB-KEY的驱动程序PKCS#11接口，于是通过java程序访问USB-KEY。

代码如下

// 厂商提供的UKEY型号名称 private static final String UKEY_PROVIDER = "SJK1217"; // UKEY驱动lib库文件 private static final String UKEY_LIB = "E:/cer/System32/SJK1217Pkcs.dll"; // UKEY的PIN码 private static final String UKEY_PIN = "1234"; private static String keystorePath = "E:/cer/hxx_sign.keystore"; private static String keystorePass = "12345678"; public static void main(String[] args) throws Exception { String pkcs11config = "name = " + UKEY_PROVIDER + "\nlibrary = "+ UKEY_LIB + "\n"; byte[] pkcs11configbytes = pkcs11config.getBytes(); ByteArrayInputStream configStream = new ByteArrayInputStream(pkcs11configbytes); SunPKCS11 ps = new sun.security.pkcs11.SunPKCS11(configStream); System.out.println(ps.toString()); Security.addProvider(ps); KeyStore.CallbackHandlerProtection pinHandler = new KeyStore.CallbackHandlerProtection(new TextCallbackHandler()); KeyStore ks = KeyStore.Builder.newInstance("PKCS11", ps, pinHandler) .getKeyStore(); ks.load(null, UKEY_PIN.toCharArray()); printKeyStoreInfo(ks); } // 打印 KeyStore中的信息 public static void printKeyStoreInfo(KeyStore keystore) throws Exception { System.out.println("Provider : " + keystore.getProvider().getName()); System.out.println("Type : " + keystore.getType()); System.out.println("Size : " + keystore.size()); Enumeration en = keystore.aliases(); while (en.hasMoreElements()) { String alias = (String) en.nextElement(); System.out.println("Alias: " + alias); X509Certificate cert = (X509Certificate) keystore .getCertificate(alias); System.out.println("Certificate: " + cert); PrivateKey privateKey = (PrivateKey) keystore.getKey(alias, null); System.out.println("Private key: " + privateKey); } }

打印的结果

SunPKCS11-SJK1217 version 1.8
Provider : SunPKCS11-SJK1217
Type : PKCS11
Size : 0

获取到的KeyStore 的size为0，是什么原因？ 国内这方面的资料好难搜索得到，有这方面的大牛 能帮忙解答一下么？