添加rsa加解密工具类

2018-02-08 13:53:59 +08:00
parent 1e4a76609c
commit fab23c6c04
1 changed files with 85 additions and 0 deletions
@@ -0,0 +1,85 @@
+package com.micro.fast.util;
+
+import org.apache.commons.net.util.Base64;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import java.io.UnsupportedEncodingException;
+import java.security.*;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+
+/**
+ * 添加rsa加解密工具类
+ *
+ * @author lsy
+ */
+public class RSAUtil {
+
+    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, InvalidKeySpecException {
+        String[] keys = keys();
+        String encode = jdkRSA(keys[1], "2018-1-1 2018-12-30");
+        System.out.println("使用私钥加密后的内容为："+encode);
+        String decode = deJdkRSA(keys[0], encode);
+        System.out.println("使用公钥解密后的内容为："+decode);
+    }
+
+    /**
+     * 生成公钥私钥
+     * @return
+     * @throws NoSuchAlgorithmException
+     */
+    public static String[]  keys() throws NoSuchAlgorithmException {
+        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
+        keyPairGenerator.initialize(512);
+        KeyPair keyPair = keyPairGenerator.generateKeyPair();
+        RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic();
+        RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate();
+        return new String[]{Base64.encodeBase64String(rsaPublicKey.getEncoded()),Base64.encodeBase64String(rsaPrivateKey.getEncoded())};
+    }
+
+    /**
+     *  私钥加密内容
+     * @param rsaPrivateKey
+     * @param content
+     * @return
+     * @throws NoSuchAlgorithmException
+     * @throws InvalidKeySpecException
+     * @throws NoSuchPaddingException
+     * @throws InvalidKeyException
+     * @throws UnsupportedEncodingException
+     * @throws BadPaddingException
+     * @throws IllegalBlockSizeException
+     */
+    public static String jdkRSA(String rsaPrivateKey, String content) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, UnsupportedEncodingException, BadPaddingException, IllegalBlockSizeException {
+        PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(rsaPrivateKey));
+        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+        PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
+        Cipher cipher = Cipher.getInstance("RSA");
+        cipher.init(Cipher.ENCRYPT_MODE, privateKey);
+        byte[] result = cipher.doFinal(content.getBytes("UTF-8"));
+        content = Base64.encodeBase64String(result);
+        return content;
+    }
+
+    /**
+     * 使用公钥解密内容
+     * @param rsaPublicKey
+     * @param content
+     * @return
+     */
+    public static String deJdkRSA(String rsaPublicKey, String content) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, UnsupportedEncodingException, BadPaddingException, IllegalBlockSizeException {
+        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+        Cipher cipher = Cipher.getInstance("RSA");
+        X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(rsaPublicKey));
+        PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
+        cipher.init(Cipher.DECRYPT_MODE, publicKey);
+        byte[] result = cipher.doFinal(Base64.decodeBase64(content));
+        return new String(result);
+    }
+}