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@@ -1,168 +0,0 @@
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-/*
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- * Copyright [2020] [MaxKey of copyright http://www.maxkey.top]
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- *
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- * Licensed under the Apache License, Version 2.0 (the "License");
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- * you may not use this file except in compliance with the License.
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- * You may obtain a copy of the License at
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- *
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- * http://www.apache.org/licenses/LICENSE-2.0
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- *
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- * Unless required by applicable law or agreed to in writing, software
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- * distributed under the License is distributed on an "AS IS" BASIS,
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- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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- * See the License for the specific language governing permissions and
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- * limitations under the License.
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- */
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-
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-
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-package org.maxkey.crypto;
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- import java.io.FileInputStream;
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- import java.io.ObjectInputStream;
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- import java.security.Key;
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- import java.security.PrivateKey;
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- import java.security.PublicKey;
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- import java.security.Signature;
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- import java.security.interfaces.RSAPrivateKey;
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- import java.security.interfaces.RSAPublicKey;
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-
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- import javax.crypto.Cipher;
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-
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-
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- /**
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- * RSA�ӽ���,RSAǩ��ǩ����֤��
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- *
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- * @author Administrator
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- *
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- */
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- public class RsaMessage {
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-
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-
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-
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-
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- public static void main(String[] args) throws Exception {
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- String str = "hello,�����ĵ����";
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- System.out.println("ԭ�ģ�" + str);
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-
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- RsaMessage rsa = new RsaMessage();
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- RSAPrivateKey privateKey = (RSAPrivateKey) rsa.readFromFile("sk.dat");
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- RSAPublicKey publickKey = (RSAPublicKey) rsa.readFromFile("pk.dat");
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-
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- byte[] encbyte = rsa.encrypt(str, privateKey);
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- System.out.println("˽Կ���ܺ�");
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- String encStr = toHexString(encbyte);
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- System.out.println(encStr);
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-
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- byte[] signBytes = rsa.sign(str, privateKey);
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- System.out.println("ǩ��ֵ��");
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- String signStr = toHexString(signBytes);
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- System.out.println(signStr);
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-
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- byte[] decByte = rsa.decrypt(encStr, publickKey);
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- System.out.println("��Կ���ܺ�");
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- String decStr = new String(decByte);
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- System.out.println(decStr);
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-
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- if (rsa.verifySign(str, signStr, publickKey)) {
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- System.out.println("rsa sign check success");
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- } else {
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- System.out.println("rsa sign check failure");
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- }
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- }
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-
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- /**
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- * ����,key�����ǹ�Կ��Ҳ������˽Կ
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- *
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- * @param message
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- * @return
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- * @throws Exception
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- */
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- public byte[] encrypt(String message, Key key) throws Exception {
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- Cipher cipher = Cipher.getInstance("RSA");
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- cipher.init(Cipher.ENCRYPT_MODE, key);
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- return cipher.doFinal(message.getBytes());
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- }
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-
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- /**
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- * ���ܣ�key�����ǹ�Կ��Ҳ������˽Կ������ǹ�Կ���ܾ���˽Կ���ܣ���֮��Ȼ
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- *
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- * @param message
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- * @return
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- * @throws Exception
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- */
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- public byte[] decrypt(String message, Key key) throws Exception {
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- Cipher cipher = Cipher.getInstance("RSA");
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- cipher.init(Cipher.DECRYPT_MODE, key);
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- return cipher.doFinal(toBytes(message));
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- }
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-
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- /**
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- * ��˽Կǩ��
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- *
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- * @param message
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- * @param key
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- * @return
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- * @throws Exception
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- */
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- public byte[] sign(String message, PrivateKey key) throws Exception {
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- Signature signetcheck = Signature.getInstance("MD5withRSA");
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- signetcheck.initSign(key);
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- signetcheck.update(message.getBytes("ISO-8859-1"));
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- return signetcheck.sign();
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- }
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-
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- /**
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- * �ù�Կ��֤ǩ�����ȷ��
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- *
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- * @param message
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- * @param signStr
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- * @return
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- * @throws Exception
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- */
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- public boolean verifySign(String message, String signStr, PublicKey key)
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- throws Exception {
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- if (message == null || signStr == null || key == null) {
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- return false;
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- }
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- Signature signetcheck = Signature.getInstance("MD5withRSA");
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- signetcheck.initVerify(key);
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- signetcheck.update(message.getBytes("ISO-8859-1"));
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- return signetcheck.verify(toBytes(signStr));
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- }
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-
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- /**
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- * ���ļ���ȡobject
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- *
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- * @param fileName
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- * @return
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- * @throws Exception
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- */
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- private Object readFromFile(String fileName) throws Exception {
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- ObjectInputStream input = new ObjectInputStream(new FileInputStream(
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- fileName));
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- Object obj = input.readObject();
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- input.close();
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- return obj;
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- }
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-
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- public static String toHexString(byte[] b) {
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- StringBuilder sb = new StringBuilder(b.length * 2);
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- for (int i = 0; i < b.length; i++) {
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- sb.append(HEXCHAR[(b[i] & 0xf0) >>> 4]);
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- sb.append(HEXCHAR[b[i] & 0x0f]);
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- }
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- return sb.toString();
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- }
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-
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- public static final byte[] toBytes(String s) {
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- byte[] bytes;
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- bytes = new byte[s.length() / 2];
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- for (int i = 0; i < bytes.length; i++) {
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- bytes[i] = (byte) Integer.parseInt(s.substring(2 * i, 2 * i + 2),
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- 16);
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- }
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- return bytes;
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- }
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-
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- private static char[] HEXCHAR = { '0', '1', '2', '3', '4', '5', '6', '7',
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- '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
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- }
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