系列二、RuoYi前后端分离（登录密码加密&去除公钥）

package com.ruoyi.common.utils.sign; import org.apache.commons.codec.binary.Base64; import org.springframework.context.annotation.Bean; import org.springframework.stereotype.Component; import javax.crypto.Cipher; import java.security.*; import java.security.interfaces.RSAPrivateKey; import java.security.interfaces.RSAPublicKey; import java.security.spec.PKCS8EncodedKeySpec; import java.security.spec.X509EncodedKeySpec; @Component public class RSAUtil { // Rsa 私钥 也可固定秘钥对 若依原写法(不安全) public static String privateKeys = ""; private static String publicKeyStr = ""; private static String privateKeyStr = ""; private static String myPublicKeyStr = ""; private static String myPrivateKeyStr = ""; private static final RSAKeyPair rsaKeyPair = new RSAKeyPair(); private static final MyRSAPublicKey myRSAPublicKey = new MyRSAPublicKey(); private static final MyRSAPrivateKey myRSAPrivateKey = new MyRSAPrivateKey(); /** * 私钥解密 * * @param text 待解密的文本 * @return 解密后的文本 */ public static String decryptByPrivateKey(String text) throws Exception { return decryptByPrivateKey(rsaKeyPair.getPrivateKey(), text); } /** * 私钥解密 * * @param privateKeyString 私钥 * @param text 待解密的文本 * @return 解密后的文本 */ public static String decryptByPrivateKey(String privateKeyString, String text) throws Exception { PKCS8EncodedKeySpec pkcs8EncodedKeySpec5 = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString)); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec5); Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.DECRYPT_MODE, privateKey); byte[] result = cipher.doFinal(Base64.decodeBase64(text)); return new String(result); } /** * 私钥解密 * * @param text 待解密的文本 * @return 解密后的文本 */ public static String myDecryptByPrivateKey(String text) throws Exception { return myDecryptByPrivateKey(myRSAPrivateKey.getPrivateKey(), text); } /** * 私钥解密 * * @param privateKeyString 私钥 * @param text 待解密的文本 * @return 解密后的文本 */ private static String myDecryptByPrivateKey(String privateKeyString, String text) throws Exception { PKCS8EncodedKeySpec pkcs8EncodedKeySpec5 = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString)); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec5); Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.DECRYPT_MODE, privateKey); byte[] result = cipher.doFinal(Base64.decodeBase64(text)); return new String(result); } /** * 公钥解密 * * @param publicKeyString 公钥 * @param text 待解密的信息 * @return 解密后的文本 */ public static String decryptByPublicKey(String publicKeyString, String text) throws Exception { X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString)); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.DECRYPT_MODE, publicKey); byte[] result = cipher.doFinal(Base64.decodeBase64(text)); return new String(result); } /** * 私钥加密 * * @param privateKeyString 私钥 * @param text 待加密的信息 * @return 加密后的文本 */ public static String encryptByPrivateKey(String privateKeyString, String text) throws Exception { PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString)); 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(text.getBytes()); return Base64.encodeBase64String(result); } /** * 公钥加密 * * @param publicKeyString 公钥 * @param text 待加密的文本 * @return 加密后的文本 */ public static String encryptByPublicKey(String publicKeyString, String text) throws Exception { X509EncodedKeySpec x509EncodedKeySpec2 = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString)); KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec2); Cipher cipher = Cipher.getInstance("RSA"); cipher.init(Cipher.ENCRYPT_MODE, publicKey); byte[] result = cipher.doFinal(text.getBytes()); return Base64.encodeBase64String(result); } public static MyRSAPublicKey generatePublicKey() { return myRSAPublicKey; } /** * 构建RSA密钥对 * * @return 生成后的公私钥信息 */ @Bean public void generateKeyPair() throws NoSuchAlgorithmException, NoSuchProviderException { KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA"); keyPairGenerator.initialize(1024); KeyPair keyPair = keyPairGenerator.generateKeyPair(); RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic(); RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate(); String publicKeyString = Base64.encodeBase64String(rsaPublicKey.getEncoded()); String privateKeyString = Base64.encodeBase64String(rsaPrivateKey.getEncoded()); rsaKeyPair.setPrivateKey(privateKeyString); rsaKeyPair.setPublicKey(publicKeyString); myRSAPublicKey.setPublicKey(publicKeyString); myRSAPrivateKey.setPrivateKey(privateKeyString); publicKeyStr = publicKeyString; privateKeyStr = privateKeyString; myPublicKeyStr = publicKeyString; myPrivateKeyStr = privateKeyString; } public static String getPublicKey() { return publicKeyStr; } public static String getPrivateKey() { return privateKeyStr; } public static String getMyPublicKeyStr() { return myPublicKeyStr; } public static String getMyPrivateKeyStr() { return myPrivateKeyStr; } public static RSAKeyPair rsaKeyPair() { return rsaKeyPair; } /** * RSA密钥-私钥对象 */ public static class RSAKeyPair { private String publicKey; private String privateKey; public void setPublicKey(String publicKey) { this.publicKey = publicKey; } public void setPrivateKey(String privateKey) { this.privateKey = privateKey; } public RSAKeyPair() { } public RSAKeyPair(String publicKey, String privateKey) { this.publicKey = publicKey; this.privateKey = privateKey; } public String getPublicKey() { return publicKey; } public String getPrivateKey() { return privateKey; } } /** * RSA密钥-公钥对象 */ public static class MyRSAPrivateKey { private String privateKey; public MyRSAPrivateKey() { } public MyRSAPrivateKey(String privateKey) {