package com.ruoyi.system.util;

import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;

public class KeyUtils {
    public static PublicKey getPublicKeyFromBase64String(String publicKeyString) throws Exception {
        byte[] publicKeyBytes = Base64.getDecoder().decode(publicKeyString);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        return keyFactory.generatePublic(keySpec);
    }
}