java+vue+rsa前后端加密解密

Base64Utils

package com.zhhgyj.zhmall.core.util;  import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;  import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream;  /** * BASE64编码解码工具包 */ public class Base64Utils { 
             /** */     /** * 读取缓冲区大小的文件 */     private static final int CACHE_SIZE = 1024;      /** */     /** * 
 * BASE64字符串解码为二进制数据 * 
 * * @param base64 * @return * @throws Exception */     public static byte[] decode(String base64) throws Exception { 
                return Base64.decode(base64);     }      /** */     /** * 
 * 二进制数据编码为BASE64字符串 * 
 * * @param bytes * @return * @throws Exception */ public static String encode(byte[] bytes) throws Exception { 
         return new String(Base64.encode(bytes)); } /** */ /** * 
 * 将文件编码为BASE64字符串 * 
 * 
 * 大文件慎用，可能会导致内存溢出 * 
 * * @param filePath * 文件绝对路径 * @return * @throws Exception */ public static String encodeFile(String filePath) throws Exception { 
         byte[] bytes = fileToByte(filePath); return encode(bytes); } /** */ /** * 
 * BASE64字符串转回文件 * 
 * * @param filePath * 文件绝对路径 * @param base64 * 编码字符串 * @throws Exception */ public static void decodeToFile(String filePath, String base64) throws Exception { 
         byte[] bytes = decode(base64); byteArrayToFile(bytes, filePath); } /** */ /** * 
 * 文件转换为二进制数组 * 
 * * @param filePath * 文件路径 * @return * @throws Exception */ public static byte[] fileToByte(String filePath) throws Exception { 
         byte[] data = new byte[0]; File file = new File(filePath); if (file.exists()) { 
         FileInputStream in = new FileInputStream(file); ByteArrayOutputStream out = new ByteArrayOutputStream(2048); byte[] cache = new byte[CACHE_SIZE]; int nRead = 0; while ((nRead = in.read(cache)) != -1) { 
         out.write(cache, 0, nRead); out.flush(); } out.close(); in.close(); data = out.toByteArray(); } return data; } /** */ /** * 
 * 二进制数据写文件 * 
 * * @param bytes * 二进制数据 * @param filePath * 文件生成目录 */ public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception { 
         InputStream in = new ByteArrayInputStream(bytes); File destFile = new File(filePath); if (!destFile.getParentFile().exists()) { 
         destFile.getParentFile().mkdirs(); } destFile.createNewFile(); OutputStream out = new FileOutputStream(destFile); byte[] cache = new byte[CACHE_SIZE]; int nRead = 0; while ((nRead = in.read(cache)) != -1) { 
         out.write(cache, 0, nRead); out.flush(); } out.close(); in.close(); } } 

RSAUtils

package com.zhhgyj.zhmall.core.util;

import java.io.ByteArrayOutputStream;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

import javax.crypto.Cipher;

/** */
/** * 
 * RSA公钥/私钥/签名工具包 * 
 * 
 * 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） * 
 * 
 * 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
 * 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，
 * 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 * 
 */
public class RSAUtils { 
       

    /** */
    /** * 加密算法RSA */
    public static final String KEY_ALGORITHM = "RSA";

    /** */
    /** * 签名算法 */
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";

    /** */
    /** * 获取公钥的key */
    private static final String PUBLIC_KEY = "RSAPublicKey";

    /** */
    /** * 获取私钥的key */
    private static final String PRIVATE_KEY = "RSAPrivateKey";

    /** */
    /** * RSA最大加密明文大小 */
    private static final int MAX_ENCRYPT_BLOCK = 117;

    /** */
    /** * RSA最大解密密文大小 */
    private static final int MAX_DECRYPT_BLOCK = 128;

    /** */
    /** * 
 * 生成密钥对(公钥和私钥) * 
 * * @return * @throws Exception */
    public static Map<String, Object> genKeyPair() throws Exception { 
       
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
        keyPairGen.initialize(1024);
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
        Map<String, Object> keyMap = new HashMap<String, Object>(2);
        keyMap.put(PUBLIC_KEY, publicKey);
        keyMap.put(PRIVATE_KEY, privateKey);
        return keyMap;
    }

    /** */
    /** * 
 * 用私钥对信息生成数字签名 * 
 * * @param data * 已加密数据 * @param privateKey * 私钥(BASE64编码) * * @return * @throws Exception */
    public static String sign(byte[] data, String privateKey) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initSign(privateK);
        signature.update(data);
        return Base64Utils.encode(signature.sign());
    }

    /** */
    /** * 
 * 校验数字签名 * 
 * * @param data * 已加密数据 * @param publicKey * 公钥(BASE64编码) * @param sign * 数字签名 * * @return * @throws Exception * */
    public static boolean verify(byte[] data, String publicKey, String sign) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PublicKey publicK = keyFactory.generatePublic(keySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initVerify(publicK);
        signature.update(data);
        return signature.verify(Base64Utils.decode(sign));
    }

    /** */
    /** * 
 * 私钥解密 * 
 * * @param encryptedData * 已加密数据 * @param privateKey * 私钥(BASE64编码) * @return * @throws Exception */
    public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, privateK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) { 
       
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) { 
       
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else { 
       
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }

    /** */
    /** * 
 * 公钥解密 * 
 * * @param encryptedData * 已加密数据 * @param publicKey * 公钥(BASE64编码) * @return * @throws Exception */
    public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段解密
        while (inputLen - offSet > 0) { 
       
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) { 
       
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else { 
       
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }

    /** */
    /** * 
 * 公钥加密 * 
 * * @param data * 源数据 * @param publicKey * 公钥(BASE64编码) * @return * @throws Exception */
    public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, publicK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 对数据分段加密
        while (inputLen - offSet > 0) { 
       
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) { 
       
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else { 
       
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        return encryptedData;
    }

    /** */
    /** * 
 * 私钥加密 * 
 * * @param data * 源数据 * @param privateKey * 私钥(BASE64编码) * @return * @throws Exception */
    public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception { 
       
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, privateK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0<