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@@ -0,0 +1,308 @@
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+package org.springblade.third.auth.util;
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+
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+import sun.misc.BASE64Decoder;
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+
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+import javax.crypto.Cipher;
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+import java.io.ByteArrayOutputStream;
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+import java.security.*;
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+import java.security.interfaces.RSAPrivateKey;
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+import java.security.interfaces.RSAPublicKey;
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+import java.security.spec.PKCS8EncodedKeySpec;
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+import java.security.spec.X509EncodedKeySpec;
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+import java.util.HashMap;
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+import java.util.Map;
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+
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+/**
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+* @author: 罗纳德·李维斯特(Ron [R]ivest)、阿迪·萨莫尔(Adi [S]hamir)和伦纳德·阿德曼(Leonard [A]dleman)
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+* @description:
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+ * RSA公钥/私钥/签名工具包
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+ * 字符串格式的密钥在未在特殊说明情况下都为BASE64编码格式
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+ * 由于非对称加密速度极其缓慢,一般文件不使用它来加密而是使用对称加密,<br/>
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+ * 非对称加密算法可以用来对对称加密的密钥加密,这样保证密钥的安全也就保证了数据的安全
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+* @date: Created in 11:20 2018/8/20
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+*/
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+public class CtwingRSAUtils {
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+
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+ /**
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+ * 加密算法RSA
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+ */
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+ public static final String KEY_ALGORITHM = "RSA";
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+
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+ /**
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+ * 签名算法
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+ */
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+ public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
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+
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+ /**
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+ * 获取公钥的key
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+ */
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+ private static final String PUBLIC_KEY = "RSAPublicKey";
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+
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+ /**
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+ * 获取私钥的key
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+ */
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+ private static final String PRIVATE_KEY = "RSAPrivateKey";
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+
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+ /**
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+ * RSA最大加密明文大小
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+ */
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+ private static final int MAX_ENCRYPT_BLOCK = 117;
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+
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+ /**
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+ * RSA最大解密密文大小
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+ */
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+ private static final int MAX_DECRYPT_BLOCK = 128;
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+
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+ /**
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+ * 生成密钥对(公钥和私钥)
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+ *
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+ * @return
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+ * @throws Exception
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+ */
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+ public static Map<String, Object> genKeyPair() throws Exception {
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+ KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
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+ keyPairGen.initialize(1024);
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+ KeyPair keyPair = keyPairGen.generateKeyPair();
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+ RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
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+ RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
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+ Map<String, Object> keyMap = new HashMap<String, Object>(2);
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+ keyMap.put(PUBLIC_KEY, publicKey);
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+ keyMap.put(PRIVATE_KEY, privateKey);
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+ return keyMap;
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+ }
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+
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+ /**
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+ * 用私钥对信息生成数字签名
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+ *
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+ * @param content 已加密数据
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+ * @param privateKey 私钥(BASE64编码)
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String sign(String content, String privateKey) throws Exception {
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+ byte[] data = content.getBytes();
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(privateKey);
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+ PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
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+ Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
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+ signature.initSign(privateK);
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+ signature.update(data);
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+// return Base64Utils.encode(signature.sign());
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+ return ByteFormat.bytesToHexString(signature.sign());
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+ }
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+
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+ /**
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+ * 校验数字签名
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+ *
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+ * @param content 源数据
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+ * @param publicKey 公钥(BASE64编码)
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+ * @param sign 数字签名
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+ * @return
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+ * @throws Exception
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+ */
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+ public static boolean verify(String content, String publicKey, String sign)
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+ throws Exception {
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+ byte[] data = content.getBytes();
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(publicKey);
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+ X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ PublicKey publicK = keyFactory.generatePublic(keySpec);
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+ Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
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+ signature.initVerify(publicK);
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+ signature.update(data);
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+// return signature.verify(new BASE64Decoder().decodeBuffer(sign));
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+ return signature.verify(ByteFormat.hexToBytes(sign));
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+ }
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+
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+ /**
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+ * 私钥解密
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+ *
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+ * @param encryptedStr 已加密数据
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+ * @param privateKey 私钥(BASE64编码)
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String decryptByPrivateKeyForLongStr(String encryptedStr, String privateKey)
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+ throws Exception {
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+ byte[] encryptedData = ByteFormat.hexToBytes(encryptedStr);
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(privateKey);
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+ PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
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+ Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
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+ cipher.init(Cipher.DECRYPT_MODE, privateK);
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+ int inputLen = encryptedData.length;
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+ ByteArrayOutputStream out = new ByteArrayOutputStream();
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+ int offSet = 0;
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+ byte[] cache;
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+ int i = 0;
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+ // 对数据分段解密
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+ while (inputLen - offSet > 0) {
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+ if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
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+ cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
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+ } else {
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+ cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
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+ }
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+ out.write(cache, 0, cache.length);
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+ i++;
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+ offSet = i * MAX_DECRYPT_BLOCK;
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+ }
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+ byte[] decryptedData = out.toByteArray();
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+ out.close();
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+ return new String(decryptedData);
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+ }
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+
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+ /**
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+ * 公钥解密
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+ *
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+ * @param encryptedData 已加密数据
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+ * @param publicKey 公钥(BASE64编码)
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+ * @return
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+ * @throws Exception
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+ */
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+ public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey)
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+ throws Exception {
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(publicKey);
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+ X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ Key publicK = keyFactory.generatePublic(x509KeySpec);
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+ Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
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+ cipher.init(Cipher.DECRYPT_MODE, publicK);
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+ int inputLen = encryptedData.length;
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+ ByteArrayOutputStream out = new ByteArrayOutputStream();
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+ int offSet = 0;
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+ byte[] cache;
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+ int i = 0;
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+ // 对数据分段解密
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+ while (inputLen - offSet > 0) {
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+ if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
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+ cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
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+ } else {
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+ cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
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+ }
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+ out.write(cache, 0, cache.length);
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+ i++;
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+ offSet = i * MAX_DECRYPT_BLOCK;
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+ }
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+ byte[] decryptedData = out.toByteArray();
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+ out.close();
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+ return decryptedData;
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+ }
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+
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+ /**
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+ * 公钥加密(数据比较长时,需要使用这个方法)
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+ *
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+ * @param content 源数据
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+ * @param publicKey 公钥(BASE64编码)
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String encryptByPublicKeyForLongStr(String content, String publicKey)
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+ throws Exception {
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(publicKey);
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+ byte[] data = content.getBytes();
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+ X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ Key publicK = keyFactory.generatePublic(x509KeySpec);
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+ // 对数据加密
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+ Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
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+ cipher.init(Cipher.ENCRYPT_MODE, publicK);
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+ int inputLen = data.length;
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+ ByteArrayOutputStream out = new ByteArrayOutputStream();
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+ int offSet = 0;
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+ byte[] cache;
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+ int i = 0;
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+ // 对数据分段加密
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+ while (inputLen - offSet > 0) {
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+ if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
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+ cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
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+ } else {
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+ cache = cipher.doFinal(data, offSet, inputLen - offSet);
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+ }
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+ out.write(cache, 0, cache.length);
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+ i++;
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+ offSet = i * MAX_ENCRYPT_BLOCK;
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+ }
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+ byte[] encryptedData = out.toByteArray();
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+ out.close();
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+ return ByteFormat.bytesToHexString(encryptedData);
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+ }
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+
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+ /**
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+ * 私钥加密
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+ *
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+ * @param data 源数据
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+ * @param privateKey 私钥(BASE64编码)
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+ * @return
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+ * @throws Exception
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+ */
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+ public static byte[] encryptByPrivateKey(byte[] data, String privateKey)
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+ throws Exception {
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+ byte[] keyBytes = new BASE64Decoder().decodeBuffer(privateKey);
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+ PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
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+ KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
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+ Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
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+ Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
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+ cipher.init(Cipher.ENCRYPT_MODE, privateK);
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+ int inputLen = data.length;
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+ ByteArrayOutputStream out = new ByteArrayOutputStream();
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+ int offSet = 0;
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+ byte[] cache;
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+ int i = 0;
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+ // 对数据分段加密
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+ while (inputLen - offSet > 0) {
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+ if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
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+ cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
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+ } else {
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+ cache = cipher.doFinal(data, offSet, inputLen - offSet);
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+ }
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+ out.write(cache, 0, cache.length);
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+ i++;
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+ offSet = i * MAX_ENCRYPT_BLOCK;
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+ }
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+ byte[] encryptedData = out.toByteArray();
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+ out.close();
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+ return encryptedData;
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+ }
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+
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+ /**
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+ * 获取私钥
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+ *
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+ * @param keyMap 密钥对
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String getPrivateKey(Map<String, Object> keyMap)
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+ throws Exception {
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+ Key key = (Key) keyMap.get(PRIVATE_KEY);
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+ return CtwingBase64Utils.encode(key.getEncoded());
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+ }
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+
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+ /**
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+ * 获取公钥
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+ *
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+ * @param keyMap 密钥对
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+ * @return
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+ * @throws Exception
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+ */
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+ public static String getPublicKey(Map<String, Object> keyMap)
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+ throws Exception {
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+ Key key = (Key) keyMap.get(PUBLIC_KEY);
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+ return CtwingBase64Utils.encode(key.getEncoded());
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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 msg = "{\"result\":0,\"msg\":\"操作成功\",\"email\":\"\",\"operator\":\"中国移动\"}";
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+// String encStr = encryptByPublicKeyForLongStr(msg, CtwingAuthConstants.PUB_KEY);
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+// System.out.println(encStr);
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+//
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+// encStr =
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+// "7DFE349C22FAC96619C7A80D9F07CC35D968D28F546FB39CAC71DAA71ABBF303C6AFDB5C56BB2F48F3D522EB76CADBAC3939FEAAA298C792510245EBF9137898605765C532AF7B4298A4A21EC96E9D292ED7662A26BFF9723C5BDD2F5976D20B0A09F5AA77DE1EE383E0D377F86A888463AB0A7CCB4A2C8599E83F62495EA94B13813D15FAA8DCCD0EFEC91076AEDCA8A05613D8639F11E9DAC0C85ABB473AB1FD27F3D70921ADD479B50537F8BC17048D497E77B775711DA60B2DC08CBE8ED3279429EAFFAC2107F742BD4D08D4CEB204D4725B7E11107DA177D27CCD6EA7BA817485B678DC786A00758828BF72230B0801DEE3A99E696B6A2E507FDC708AA44C58EDB909D6AA7FF2B1218C51C24047D96F25E4C03724C90F6EEEE8E49B14B25DCE431D0ECA7D115F65B2A135972D9AEB6BF0DF7EBEDF391B82F0C8F0355EC16090AF88333AA31B0210E3652015DF839A187AC0CFDA709119FD5C80D2710FC38BE265974F22E0E35AE375B32BA05029F4196C9BEF845312C04AD04359132BC8";
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+// String decStr = decryptByPrivateKeyForLongStr(encStr, CtwingAuthConstants.PRI_KEY);
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+// System.out.println(new String(decStr));
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+//
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+// }
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+
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+}
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+
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