import?java.io.FileInputStream;
import?java.io.FileNotFoundException;
import?java.io.IOException;
import?java.security.InvalidKeyException;
import?java.security.KeyStore;
import?java.security.KeyStoreException;
import?java.security.NoSuchAlgorithmException;
import?java.security.PrivateKey;
import?java.security.PublicKey;
import?java.security.Signature;
import?java.security.SignatureException;
import?java.security.UnrecoverableKeyException;
import?java.security.cert.Certificate;
import?java.security.cert.CertificateException;
import?java.security.cert.CertificateFactory;
import?java.security.cert.X509Certificate;

import?javax.crypto.BadPaddingException;
import?javax.crypto.Cipher;
import?javax.crypto.IllegalBlockSizeException;
import?javax.crypto.NoSuchPaddingException;

import?org.apache.commons.codec.DecoderException;
import?org.apache.commons.codec.binary.Hex;


public?class?CertificateUtil?{
	/**
	?*?從密鑰庫得到私鑰
	?*?@param?keyStorePath
	?*?@param?alias
	?*?@param?password
	?*?@return
	?*/
	public?static?PrivateKey?getPrivateKeyByKeystore（String?keyStorePath?String?alias?String?password）{
		try?{
			KeyStore?ks?=?KeyStore.getInstance（KeyStore.getDefaultType（））;
			FileInputStream?is?=?new?FileInputStream（keyStorePath）;
			ks.load（is?password.toCharArray（））;
			is.close（）;
			
			return?（PrivateKey）ks.getKey（alias?password.toCharArray（））;
		}?catch?（KeyStoreException?e）?{
			e.printStackTrace（）;
		}?catch?（FileNotFoundException?e）?{
			e.printStackTrace（）;
		}?catch?（NoSuchAlgorithmException?e）?{
			e.printStackTrace（）;
		}?catch?（CertificateException?e）?{
			e.printStackTrace（）;
		}?catch?（IOException?e）?{
			e.printStackTrace（）;
		}?catch?（UnrecoverableKeyException?e）?{
			e.printStackTrace（）;
		}
		return?null;
	}
	
	/**
	?*?從證書得到公鑰
	?*?@param?certificatePath
	?*?@return
	?*/
	public?static?PublicKey?getPublicKeyByCertificate（String?certificatePath）{
		try?{
			CertificateFactory?certificateFactory?=?CertificateFactory.getInstance（“X.509“）;
			FileInputStream?is?=?new?FileInputStream（certificatePath）;
			Certificate?certificate?=?certificateFactory.generateCertificate（is）;
			is.close（）;
			
			return?certificate.getPublicKey（）;
		}?catch?（CertificateException?e）?{
			e.printStackTrace（）;
		}?catch?（FileNotFoundException?e）?{
			e.printStackTrace（）;
		}?catch?（IOException?e）?{
			e.printStackTrace（）;
		}
		return?null;
	}
	
	/**
	?*?私鑰加解密
	?*?@param?data
	?*?@param?privateKey
	?*?@param?mode
	?*????????????0-加密，1-解密
	?*?@return
	?*/
	public?static?String?codeByPrivateKey（String?data?PrivateKey?privateKey?int?mode）{
		try?{
			Cipher?cipher?=?Cipher.getInstance（privateKey.getAlgorithm（））;
			if?（mode?==?0）?{
				cipher.init（Cipher.ENCRYPT_MODE?privateKey）;
			}?else?{
				cipher.init（Cipher.DECRYPT_MODE?privateKey）;
			}
			return?Hex.encodeHexString（cipher.doFinal（Hex.decodeHex（data
					.toCharArray（））））;
		}?catch?（NoSuchAlgorithmExcepti

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????8033??2014-01-12?19:43??CertificateUtil.java

-----------?---------??----------?-----??----

?????????????????8033????????????????????1