package com.yb.helper;
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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.KeyFactory;
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import java.security.interfaces.RSAPublicKey;
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import java.security.spec.X509EncodedKeySpec;
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public class RsaHelper {
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// RsA秘钥加密
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public static String encrypt(String key, String str) throws Exception {
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// Base64编码的公钥
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byte[] decoded = Base64.decodeBase64(key + "");
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RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
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// RSA加密：RSA/ECB/NoPadding
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.ENCRYPT_MODE, pubKey);
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String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
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return outStr;
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}
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}
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