package?jct;


import?javax.crypto.*;
import?javax.crypto.spec.*;
import?java.security.Key;
import?java.security.KeyFactory;
import?java.security.spec.EncodedKeySpec;
import?java.security.Security;
import?java.security.*;
import?java.util.Random;
import?java.util.Vector;

/**
?*?
封裝同Blowfish對稱加密算法有關的方法，包括了使用創建Blowfish密碼，使用Blowfish加密、解密?使用PBE（基于口令的加密）存取blowfiwsh密碼?

?*?@Copyright:WDSsoft
?*?@ad:WDSsoft?“企業多級數字簽名系統”-?最佳的企業電子文檔多級數字簽名方案
?*?@URL:www.wdssoft.com
?*?@作者?吳東升?mdss@wdssoft.com?bluesunday@sohu.com
?*/



public?class?BlowfishTool?{

??public?BlowfishTool（）?{
??}
/**
?*?使用Blowfish加密
?*?@param?Key?key:密碼
?*?@param?byte[]?text:明文
?*?@return?byte[]:密文
?*/
??public?static?byte[]?encryptReturnByte（Key?keybyte[]?text）{
?????try{
?????????Cipher?cipher=Cipher.getInstance（“Blowfish/ECB/PKCS5Padding“）;
?????????cipher.init（Cipher.ENCRYPT_MODEkey）;
?????????return?cipher.doFinal（text）;
?????}catch（Exception?e）{??return?null;????}
??}
/**
?*?Blowfish解密
?*?@param?Key?key：密碼
?*?@param?byte[]?text：密文
?*?@return?byte[]?:?明文
?*/
???public?static?byte[]?decryptReturnByte（Key?keybyte[]?text）{
?????try{
?????????Cipher?cipher=Cipher.getInstance（“Blowfish/ECB/PKCS5Padding“）;
?????????cipher.init（Cipher.DECRYPT_MODEkey）;
?????????return?cipher.doFinal（text）;
?????}catch（Exception?e）{??return?null;}
???}
/**
?*?使用PBE保管Blowfish密碼
?*?@param?Key?targetKey:?Blowfish密碼
?*?@param?char[]?password:?口令
?*?@return?Vector－element1:byte[]:密文-element2:byte[]:鹽
?*/

????public?static?Vector?wrapKey（Key?targetKeychar[]?password）{
???????try{
??????????PBEKeySpec?keySpec=new?PBEKeySpec（password）;
??????????SecretKeyFactory?keyFactory=SecretKeyFactory.getInstance（“PBEWithMD5AndDES“）;
??????????SecretKey?key=keyFactory.generateSecret（keySpec）;
??????????Cipher?cipher=Cipher.getInstance（“PBEWithMD5AndDES“）;
??????????byte[]?salt=new?byte[8];
??????????Random?random=new?Random（）;
??????????random.nextBytes（salt）;
??????????PBEParameterSpec?paramSpec=new?PBEParameterSpec（salt100）;
??????????cipher.init（cipher.WRAP_MODEkeyparamSpec）;
??????????Vector?encryptedKey=new?Vector（）;
??????????encryptedKey.addElement（cipher.wrap（targetKey））;
??????????encryptedKey.addElement（salt）;
??????????return?encryptedKey;
???????}catch（Exception?e）{e.printStackTrace（）;
??????????return?null;
????????}
????}
/**
?*?取出PBE加密的密鑰
?*?@param?Vector?encryptedKey－element1:byte[]:密文-element2:byte[]:鹽
?*?@param?char[]?password:口令
?*?@return?Key:Blowfish密碼
?*/
??public?static?Key?unwrapKey（Vector?encryptedKeychar[]?password）{
??????try{

??????????byte[]?wrapedKey=（byte[]）encryptedKey.elementAt（0）;
??????????byte[]?salt=（byte[]）encryptedKey.elementAt（1）;
??????????PBEKeySpec?keySpec=new?PBEKeySpec（password）;
??????????SecretKeyFactory?keyFactory=SecretKeyFactory.getInstance（“PBEWithMD5AndDES“）;
??????????SecretKey?key=keyFactory.generateSecret（keySpec）;
??????????Cipher?cipher=Cipher.getInstance（“PBEWithMD5AndDES“）;
??????????PBEParameterSpec?paramSpec=new?PBEParameterSpec（salt100）;
??????????ciph

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2006-01-04?17:55??jct\
?????文件????????5047??2006-01-04?20:59??jct\RSATool.java
?????文件????????2015??2006-01-04?20:59??jct\Digest.java
?????文件????????4078??2006-01-04?20:59??jct\BlowfishTool.java
?????文件????????4672??2006-01-04?20:59??jct\PBETool.java
?????文件?????????616??2006-01-04?21:28??jct\_Readme.java