package?com.asiainfo.openplatform.common.util;

import?java.io.ByteArrayOutputStream;
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.Signature;
import?java.security.interfaces.RSAPrivateKey;
import?java.security.interfaces.RSAPublicKey;
import?java.security.spec.PKCS8EncodedKeySpec;
import?java.security.spec.X509EncodedKeySpec;
import?java.util.HashMap;
import?java.util.Map;

import?javax.crypto.Cipher;

import?org.bouncycastle.jce.provider.BouncyCastleProvider;

/**
?*?RSA加密工具類
?*?
?*?Copyright:?Copyright?（c）?2011?Asiainfo
?*?
?*?@ClassName:?TransferSoapReqHelper.java
?*?@Description:?該類的功能描述
?*
?*?@version:?v1.0.0
?*?@author:?zhangmeng3
?*?@date:?2014-9-17?上午10:38:45
?*
?*/
public?class?RSAUtils?{??
	
????/**?
?????*?加密算法RSA?
?????*/??
????public?static?final?String?KEY_ALGORITHM?=?“RSA“;??
??????
????/**?
?????*?簽名算法?
?????*/??
????public?static?final?String?SIGNATURE_ALGORITHM?=?“MD5withRSA“;??
??
????/**?
?????*?獲取公鑰的key?
?????*/??
????private?static?final?String?PUBLIC_KEY?=?“RSAPublicKey“;??
??????
????/**?
?????*?獲取私鑰的key?
?????*/??
????private?static?final?String?PRIVATE_KEY?=?“RSAPrivateKey“;??
??????
????/**
?????*?RSA最大加密明文大小
?????*/??
????private?static?final?int?MAX_ENCRYPT_BLOCK?=?64;??
????
????/**?
?????*?RSA最大解密密文大小?
?????*/??
????private?static?final?int?MAX_DECRYPT_BLOCK?=?75;
????
????/**
?????*?RSA密鑰長度
?????*/
????private?static?final?int?INITIAL_KEY_SIZE?=?600;
??
????/**
?????*?
?
?????*?生成密鑰對（公鑰和私鑰）?
?????*?
?
?????*??
?????*?@return?
?????*?@throws?Exception?
?????*/??
????public?static?Mapject>?genKeyPair（）?throws?Exception?{??
????????KeyPairGenerator?keyPairGen?=?KeyPairGenerator.getInstance（KEY_ALGORITHM?new?BouncyCastleProvider（））;
????????keyPairGen.initialize（INITIAL_KEY_SIZE）;
????????KeyPair?keyPair?=?keyPairGen.generateKeyPair（）;??
????????RSAPublicKey?publicKey?=?（RSAPublicKey）?keyPair.getPublic（）;??
????????RSAPrivateKey?privateKey?=?（RSAPrivateKey）?keyPair.getPrivate（）;??
????????Mapject>?keyMap?=?new?HashMapject>（2）;
????????keyMap.put（PUBLIC_KEY?publicKey）;??
????????keyMap.put（PRIVATE_KEY?privateKey）;??
????????return?keyMap;
????}
??????
????/**
?????*?
?
?????*?用私鑰對信息生成數字簽名?
?????*?
?
?????*??
?????*?@param?data?已加密數據?
?????*?@param?privateKey?私鑰（base64編碼）?
?????*??
?????*?@return?
?????*?@throws?Exception?
?????*/??
????public?static?String?sign（byte[]?data?String?privateKey）?throws?Exception?{??
????????byte[]?keyBytes?=?base64Utils.decode（privateKey）;??
????????PKCS8EncodedKeySpec?pkcs8KeySpec?=?new?PKCS8EncodedKeySpec（keyBytes）;??
????????KeyFactory?keyFactory?=?KeyFactory.getInstance（KEY_ALGORITHM）;??
????????PrivateKey?privateK?=?keyFactory.generatePrivate（pkcs8KeySpec）;??
????????S

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

?????文件??????11790??2020-04-11?17:17??RSAUtils.java

?????文件???????1343??2020-04-11?17:27??rsa.php

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

????????????????13133????????????????????2