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package com.ruoyi.common.utils;
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import org.apache.commons.codec.binary.Base64;
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import javax.crypto.Cipher;
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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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/**
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* RSA加密解密
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*
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* @author ruoyi
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**/
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public class RsaUtils
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{
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// Rsa 私钥
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public static String privateKey = "MIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEA4Qj9AvP1YzQ28Z5L\n" +
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"jgqlHl1tWu8lNN8u7nHe7XQLAQ2qYcRp9g8zPhJ8Gf33/++QsrE7RxEozcxL6Vv/\n" +
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"WhJWqwIDAQABAkAcTrklCfMwS30t36+5anVi4HXFHpgbkoegzwov7I0F0Kndk81M\n" +
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"WRPzriIsMWSKPwF5eS+FbopM+9qh6W8WFCyBAiEA88tPNwHuJ/35Z40jqspVYiTf\n" +
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"TLrzrVmgaXCMFG7UdvsCIQDsTT7UTL4JvH5BUX488uouyZt/DFyXCyVQOFglj9hQ\n" +
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"EQIhAJgIw//D3mdmRTDEneeWgqTP5cmOFQSYDidzHohnjWwdAiB721U2U+88DTek\n" +
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"JwHjEnQbCANgCWuyo93v+UiCj64S8QIhAJs6G4SSKS2hvYKYF+ERqkt0GTaDviSP\n" +
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"wg+zTdAgRmjr";
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/**
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* 私钥解密
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*
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* @param text 待解密的文本
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* @return 解密后的文本
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*/
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public static String decryptByPrivateKey(String text) throws Exception
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{
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return decryptByPrivateKey(privateKey, text);
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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 publicKeyString 公钥
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* @param text 待解密的信息
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* @return 解密后的文本
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*/
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public static String decryptByPublicKey(String publicKeyString, String text) throws Exception
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{
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X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));
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KeyFactory keyFactory = KeyFactory.getInstance("RSA");
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PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.DECRYPT_MODE, publicKey);
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byte[] result = cipher.doFinal(Base64.decodeBase64(text));
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return new String(result);
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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 privateKeyString 私钥
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* @param text 待加密的信息
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* @return 加密后的文本
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*/
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public static String encryptByPrivateKey(String privateKeyString, String text) throws Exception
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{
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PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));
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KeyFactory keyFactory = KeyFactory.getInstance("RSA");
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PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.ENCRYPT_MODE, privateKey);
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byte[] result = cipher.doFinal(text.getBytes());
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return Base64.encodeBase64String(result);
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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 privateKeyString 私钥
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* @param text 待解密的文本
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* @return 解密后的文本
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*/
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public static String decryptByPrivateKey(String privateKeyString, String text) throws Exception
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{
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PKCS8EncodedKeySpec pkcs8EncodedKeySpec5 = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));
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KeyFactory keyFactory = KeyFactory.getInstance("RSA");
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PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec5);
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.DECRYPT_MODE, privateKey);
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byte[] result = cipher.doFinal(Base64.decodeBase64(text));
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return new String(result);
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}
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/**
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* 公钥加密
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*
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* @param publicKeyString 公钥
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* @param text 待加密的文本
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* @return 加密后的文本
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*/
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public static String encryptByPublicKey(String publicKeyString, String text) throws Exception
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{
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X509EncodedKeySpec x509EncodedKeySpec2 = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));
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KeyFactory keyFactory = KeyFactory.getInstance("RSA");
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PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec2);
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.ENCRYPT_MODE, publicKey);
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byte[] result = cipher.doFinal(text.getBytes());
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return Base64.encodeBase64String(result);
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}
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/**
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* 构建RSA密钥对
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*
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* @return 生成后的公私钥信息
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*/
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public static RsaKeyPair generateKeyPair() throws NoSuchAlgorithmException
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{
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KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
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keyPairGenerator.initialize(1024);
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KeyPair keyPair = keyPairGenerator.generateKeyPair();
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RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic();
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RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate();
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String publicKeyString = Base64.encodeBase64String(rsaPublicKey.getEncoded());
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String privateKeyString = Base64.encodeBase64String(rsaPrivateKey.getEncoded());
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return new RsaKeyPair(publicKeyString, privateKeyString);
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}
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/**
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* RSA密钥对对象
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*/
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public static class RsaKeyPair
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{
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private final String publicKey;
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private final String privateKey;
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public RsaKeyPair(String publicKey, String privateKey)
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{
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this.publicKey = publicKey;
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this.privateKey = privateKey;
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}
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public String getPublicKey()
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{
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return publicKey;
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}
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public String getPrivateKey()
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{
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return privateKey;
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}
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}
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}
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