/*
?*?To?change?this?license?header?choose?License?Headers?in?Project?Properties.
?*?To?change?this?template?file?choose?Tools?|?Templates
?*?and?open?the?template?in?the?editor.
?*/

package?rsa_ed;

/**
?*
?*?@author?judylily
?*/
import?java.security.Key;
import?java.security.KeyFactory;
import?java.security.KeyPair;
import?java.security.KeyPairGenerator;
import?java.security.PrivateKey;
import?java.security.PublicKey;
import?java.security.spec.PKCS8EncodedKeySpec;
import?java.security.spec.X509EncodedKeySpec;
import?java.util.HashMap;
import?java.util.Map;
import?javax.crypto.Cipher;
import?javax.crypto.KeyAgreement;
import?javax.crypto.SecretKey;
import?javax.crypto.interfaces.DHPrivateKey;
import?javax.crypto.interfaces.DHPublicKey;
import?javax.crypto.spec.DHParameterSpec;
import?javax.crypto.spec.SecretKeySpec;
?
public?abstract?class?DH?{
????/**
?????*?非對(duì)稱加密密鑰算法
?????*/
	private?static?final?String?KEY_ALGORITHM?=?“DH“;
????/**
?????*?本地密鑰算法，即對(duì)稱加密密鑰算法
?????*?可選DES、DESede或者AES
?????*/
	private?static?final?String?SELECT_ALGORITHM?=?“AES“;
	/**
	?*?密鑰長(zhǎng)度
	?*/
	private?static?final?int?KEY_SIZE?=?512;
	//公鑰
	private?static?final?String?PUBLIC_KEY?=?“DHPublicKey“;
	//私鑰
	private?static?final?String?PRIVATE_KEY?=?“DHPrivateKey“;
	
	/**
	?*?初始化甲方密鑰
	?*?@return?Map?甲方密鑰Map
	?*?@throws?Exception
	?*/
	public?static?Mapject>?initKey（）?throws?Exception{
		//實(shí)例化密鑰對(duì)生成器
		KeyPairGenerator?keyPairGenerator?=?KeyPairGenerator.getInstance（KEY_ALGORITHM）;
		//初始化密鑰對(duì)生成器
		keyPairGenerator.initialize（KEY_SIZE）;
		//生成密鑰對(duì)
		KeyPair?keyPair?=?keyPairGenerator.generateKeyPair（）;
		//甲方公鑰
		DHPublicKey?publicKey?=?（DHPublicKey）keyPair.getPublic（）;
		//甲方私鑰
		DHPrivateKey?privateKey?=?（DHPrivateKey）keyPair.getPrivate（）;
		//將密鑰對(duì)存儲(chǔ)在Map中
		Mapject>?keyMap?=?new?HashMapject>（2）;
		keyMap.put（PUBLIC_KEY?publicKey）;
		keyMap.put（PRIVATE_KEY?privateKey）;
		return?keyMap;
	}
	
	/**
	?*?初始化乙方密鑰
	?*?@param?key?甲方公鑰
	?*?@return?Map?乙方密鑰Map
	?*?@throws?Exception
	?*/
	public?static?Mapject>?initKey（byte[]?key）?throws?Exception{
		//解析甲方公鑰
		//轉(zhuǎn)換公鑰材料
		X509EncodedKeySpec?x509KeySpec?=?new?X509EncodedKeySpec（key）;
		//實(shí)例化密鑰工廠
		KeyFactory?keyFactory?=?KeyFactory.getInstance（KEY_ALGORITHM）;
		//產(chǎn)生公鑰
		PublicKey?pubKey?=?keyFactory.generatePublic（x509KeySpec）;
		//由甲方公鑰構(gòu)建乙方密鑰
		DHParameterSpec?dhParameterSpec?=?（（DHPublicKey）pubKey）.getParams（）;
		//實(shí)例化密鑰對(duì)生成器
		KeyPairGenerator?keyPairGenerator?=?KeyPairGenerator.getInstance（KEY_ALGORITHM）;
		//初始化密鑰對(duì)生成器
		keyPairGenerator.initialize（KEY_SIZE）;
		//產(chǎn)生密鑰對(duì)
		KeyPair?keyPair?=?keyPairGenerator.generateKeyPair（）;
		//乙方公鑰
		DHPublicKey?publicKey?=?（DHPublicKey）?keyPair.getPublic（）;
		//乙方私約
		DHPrivateKey?privateKey?=?（DHPrivateKey）?keyPair.getPrivate（）;
		//將密鑰對(duì)存儲(chǔ)在Map中
		Mapject>?keyMap?=?new?HashMapject>（2）;
		keyMap.put（PUBLIC_KEY?publicKey）;
		keyMap.put（PRIVATE_KEY?privateKey）;
		return?keyMap;
	}
	
	/**
	?*?加密
	?*?@param?data?待加密數(shù)據(jù)
	?*?@param?key?密鑰
	?*?

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-06-17?07:36??rsa_dh_\
?????文件?????????210??2020-06-17?07:36??__MACOSX\._rsa_dh_
?????文件????????5955??2020-06-17?06:24??rsa_dh_\DH.java
?????文件????????3548??2020-06-17?06:38??rsa_dh_\DHTest.java
?????文件????????4245??2020-06-16?17:23??rsa_dh_\RSA.java