java加密算法(参考网络).doc

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1、packagecom.ex8;importjava.io.ByteArrayOutputStream;importjava.io.File;importjava.io.FileInputStream;importjava.io.FileOutputStream;importjava.io.IOException;importjava.io.ObjectOutputStream;importjava.security.Key;importjava.security.KeyFactory;importjava.secu

2、rity.KeyPair;importjava.security.KeyPairGenerator;importjava.security.NoSuchAlgorithmException;importjava.security.PublicKey;importjava.security.spec.InvalidKeySpecException;importjava.security.spec.X509EncodedKeySpec;importjavax.crypto.KeyGenerator;publicclas

3、sKeyGeneratorEx{publicstaticvoidmain(String[]args)throwsNoSuchAlgorithmException,IOException,InvalidKeySpecException{KeyGeneratorkg=KeyGenerator.getInstance("DESede");kg.init(168);Keykey=kg.generateKey();byte[]bs=key.getEncoded();System.out.println("得到单钥加密密钥："

4、+newString(bs));System.out.println("-----------------------------------------");KeyPairGeneratorkpg=KeyPairGenerator.getInstance("RSA");kpg.initialize(1024);KeyPairkp=kpg.generateKeyPair();bs=kp.getPublic().getEncoded();System.out.println("产生双玥的Public密钥对的公钥："+

5、newString(bs));System.out.println("------------------------------------------");bs=kp.getPrivate().getEncoded();System.out.println("产生双玥的Private密钥对的私钥："+newString(bs));System.out.println("-----------------------------------------");Stringpath="E:"+File.separat

6、or+"forrest"+File.separator+"java"+File.separator+"key"+File.separator+"publicKey.dat";Filef=newFile(path);FileOutputStreamfout=newFileOutputStream(f);fout.write(kp.getPublic().getEncoded());fout.flush();fout.close();System.out.println("PublicKeysavedabsolutep

7、ath:"+f.getAbsolutePath());System.out.println("------------------------------------------");path="E:"+File.separator+"forrest"+File.separator+"java"+File.separator+"key"+File.separator+"privateKey.dat";ObjectOutputStreamout=newObjectOutputStream(newFileOutputS

8、tream(newFile(path)));out.writeObject(kp.getPrivate());out.flush();out.close();System.out.println("PrivateKeysaved");System.out.println("------------------------------------------"