公钥私钥加密解密代码import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
pto.Cipher;
public class RSASecurityUtil2 {
/
** 指定加密算法为RSA */
private static final String ALGORITHM = "RSA";
/** 密钥长度，⽤来初始化 */
private static final int KEYSIZE = 1024;
/** 指定公钥存放⽂件 */
private static String PUBLIC_KEY_FILE = "PublicKey";
/** 指定私钥存放⽂件 */
private static String PRIVATE_KEY_FILE = "PrivateKey";
* @throws Exception
*/
private static void generateKeyPair() throws Exception {
/
/ /** RSA算法要求有⼀个可信任的随机数源 */
// SecureRandom secureRandom = new SecureRandom();
/** 为RSA算法创建⼀个KeyPairGenerator对象 */
KeyPairGenerator keyPairGenerator = Instance(ALGORITHM);
/** 利⽤上⾯的随机数据源初始化这个KeyPairGenerator对象 */
// keyPairGenerator.initialize(KEYSIZE, secureRandom);
keyPairGenerator.initialize(KEYSIZE);
/** ⽣成密匙对 */
KeyPair keyPair = ateKeyPair();
/** 得到公钥 */
Key publicKey = Public();
/
** 得到私钥 */
Key privateKey = Private();
ObjectOutputStream oos1 = null;
ObjectOutputStream oos2 = null;
try {
/** ⽤对象流将⽣成的密钥写⼊⽂件 */
oos1 = new ObjectOutputStream(new FileOutputStream(PUBLIC_KEY_FILE));
oos2 = new ObjectOutputStream(new FileOutputStream(PRIVATE_KEY_FILE));
oos1.writeObject(publicKey);
oos2.writeObject(privateKey);
} catch (Exception e) {
throw e;
}
finally{
/** 清空缓存，关闭⽂件输出流 */
oos1.close();
oos2.close();
}
}
* @param source 源数据
* @return
* @throws Exception
*/
public static String encrypt(String source) throws Exception { generateKeyPair();
Key publicKey;
ObjectInputStream ois = null;
try {
java源代码加密/** 将⽂件中的公钥对象读出 */
ois = new ObjectInputStream(new FileInputStream(
PUBLIC_KEY_FILE));
publicKey = (Key) adObject();
} catch (Exception e) {
throw e;
}
finally{
ois.close();
}
/** 得到Cipher对象来实现对源数据的RSA加密 */
Cipher cipher = Instance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] b = Bytes();
/** 执⾏加密操作 */
byte[] b1 = cipher.doFinal(b);
BASE64Encoder encoder = new BASE64Encoder();
de(b1);
}
* @param cryptograph 密⽂
* @return
* @throws Exception
*/
public static String decrypt(String cryptograph) throws Exception { Key privateKey;
ObjectInputStream ois = null;
try {
/** 将⽂件中的私钥对象读出 */
ois = new ObjectInputStream(new FileInputStream(
PRIVATE_KEY_FILE));
privateKey = (Key) adObject();
} catch (Exception e) {
throw e;
}
finally{
ois.close();
}
/** 得到Cipher对象对已⽤公钥加密的数据进⾏RSA解密 */
Cipher cipher = Instance(ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
BASE64Decoder decoder = new BASE64Decoder();
byte[] b1 = decoder.decodeBuffer(cryptograph);
/** 执⾏解密操作 */
byte[] b = cipher.doFinal(b1);
return new String(b);
}
public static void main(String[] args) throws Exception {
String source = "恭喜发财!";// 要加密的字符串
System.out.println("准备⽤公钥加密的字符串为：" + source);
String cryptograph = encrypt(source);// ⽣成的密⽂
System.out.print("⽤公钥加密后的结果为:" + cryptograph);
System.out.println();
String target = decrypt(cryptograph);// 解密密⽂
System.out.println("⽤私钥解密后的字符串为：" + target);
System.out.println();
}
}
转载于:wwwblogs/wdpnodecodes/p/7407331.html

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