public class CustomizableCrypto implements Crypto { /** * 构造 X509 式证书的工厂变量 */ private CertificateFactory certFact ; /** * 获取构造 X509 式证书的工厂变量（单例模式） * * @return 证书工厂变量 */ public synchronized CertificateFacto

publicclass CustomizableCrypto implements Crypto

{

/**

* 构造X509格式证书的工厂变量

*/

private CertificateFactory certFact;

/**

* 获取构造X509格式证书的工厂变量（单例模式）

*

* @return证书工厂变量

*/

publicsynchronizedCertificateFactory getCertificateFactory()

{

if (certFact == null)

{

try

{

certFact =CertificateFactory.getInstance("X.509");

}

catch(CertificateException e)

{

if (logger.isErrorEnable())

{

logger.error("Fail to get CertificateFactory");

}

}

returncertFact;

}

returncertFact;

}

public PrivateKeygetPrivateKey(String keyName, String passwrod)

{

PEMReader pemIn;

ByteArrayInputStreampemByteIn = new ByteArrayInputStream(getprivatekey(keyName));

pemIn = new PEMReader(newInputStreamReader(pemByteIn));

return ((KeyPair) pemIn.readObject()).getPrivate();

}

public X509Certificate[]getCertificates(String keyName)

{

X509Certificate[] certList= new X509Certificate[1];

// 从psql中取出证书并转换为X509格式证书

CertificateFactory cf = null;

X509Certificate cert = null;

cf = getCertificateFactory();

ByteArrayInputStream bais =new ByteArrayInputStream(getCertificate(keyName));

cert = (X509Certificate)cf.generateCertificate(bais);

certList[0] = cert;

return certList;

}

其他方法空实现....

}