package com.dayu.qiheonlinelibrary.net;
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import java.nio.charset.StandardCharsets;
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import java.security.KeyFactory;
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import java.security.PublicKey;
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import java.security.spec.X509EncodedKeySpec;
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import javax.crypto.Cipher;
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/**
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* author: zuo
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* Date: 2024-07-29
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* Time: 14:38
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* 备注：RSA加密工具类
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*/
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public class RSAUtile {
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public static byte[] encryptByPublicKey(String data, String publicKey) throws Exception {
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// 得到公钥
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X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKey.getBytes(StandardCharsets.UTF_8));
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KeyFactory kf = KeyFactory.getInstance("RSA");
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PublicKey keyPublic = kf.generatePublic(keySpec);
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// 加密数据
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Cipher cp = Cipher.getInstance("RSA/ECB/PKCS1Padding");
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cp.init(Cipher.ENCRYPT_MODE, keyPublic);
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return cp.doFinal(data.getBytes(StandardCharsets.UTF_8));
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}
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}
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