import?java.io.FileInputStream;
import?java.io.FileOutputStream;
import?java.io.InputStream;
import?java.io.objectInputStream;
import?java.io.OutputStream;
import?java.security.Key;
import?java.security.KeyPair;

import?javax.crypto.Cipher;


public?class?Test?{
	public?static?void?main（String[]?args）?throws?Exception?{
		?/*?1
		?SecureRandom?sr?=?new?SecureRandom（）;
	
	?????KeyPairGenerator?kg?=?KeyPairGenerator.getInstance（“RSA“new?org.bouncycastle.jce.provider.BouncyCastleProvider（））;
	
	?????//注意密鑰大小最好為1024否則解密會(huì)有亂碼情況.
	
	?????kg.initialize（1024?sr）;
	
	?????FileOutputStream?fos?=?new?FileOutputStream（“C:/RSAKey.xml“）;
	
	?????objectOutputStream?oos?=?new?objectOutputStream（fos）;
	
	?????//生成密鑰
	
	?????oos.writeobject（kg.generateKeyPair（）.getPrivate（））;
	
	?????oos.close（）;
	?????*/

		?/*?2
	?????Key?kp;

	?????String?fileName?=?“RSAKey.xml“;
	
	?????InputStream?is?=?Test.class.getClassLoader（）.getResourceAsStream（fileName）;
	
	?????objectInputStream?oos?=?new?objectInputStream（is）;
	
	?????kp?=?（Key）?oos.readobject（）;
	
	?????oos.close（）;

	?????encryptFile（“C:/bsmain_runtime.log““C:/encry.log“kp）;
	??????
	??????*/
????}
	
	public?static?void?encryptFile（String?srcFileName?String?destFileNameKey?publicKkey）?throws?Exception?{
	
	??????OutputStream?outputWriter?=?null;
	
	??????InputStream?inputReader?=?null;
	
	??????try?{
	
	????????????Cipher?cipher?=?Cipher.getInstance（“RSA“?new?org.bouncycastle.jce.provider.BouncyCastleProvider（））;
	

	????????????
	????????????byte[]?buf?=?new?byte[100];
	
	????????????int?bufl;
	
	????????????cipher.init（Cipher.ENCRYPT_MODE?publicKkey）;
	????????????
	????????????System.out.println（cipher.getBlockSize（）+“================“）;
	
	????????????outputWriter?=?new?FileOutputStream（destFileName）;
	
	????????????inputReader?=?new?FileInputStream（srcFileName）;
	
	????????????while?（（bufl?=?inputReader.read（buf））?!=?-1）?{
	
	????????????????byte[]?encText?=?null;
	
	????????????????byte[]?newArr?=?null;
	
	????????????????if?（buf.length?==?bufl）?{
	
	????????????????????newArr?=?buf;
	
	????????????????}?else?{
	
	????????????????????newArr?=?new?byte[bufl];
	
	????????????????????for?（int?i?=?0;?i?	
	??????????????????????????newArr[i]?=?（byte）?buf[i];
	
	????????????????????}
	
	????????????????}
	
	????????????????encText?=?cipher.doFinal（newArr）;
	
	????????????????outputWriter.write（encText）;
	
	????????????}
	
	????????????outputWriter.flush（）;

	??????}?catch?（Exception?e）?{
	
	????????????throw?e;
	
	??????}?finally?{
	
	????????????try?{
	
	????????????????if?（outputWriter?!=?null）?{
	
	????????????????????outputWriter.close（）;
	
	????????????????}
	
	????????????????if?（inputReader?!=?null）?{
	
	????????????????????inputReader.close（）;
	
	????????????????}
	
	????????????}?catch?（Exception?e）?{
	
	????????????}
	
	??????}
	
	??}


}

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

?????文件???????3011??2009-06-29?22:13??Test.java

?????文件????1632822??2009-06-29?21:50??bcprov-jdk15-143.jar

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

??????????????1635833????????????????????2