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package com.mycomm.itool.security;

import com.mycomm.itool.SystemUtil;
import com.mycomm.itool.utils.Base58;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.security.*;
import java.util.Base64;

public class RSAVerify {
    /**
     *
     log.info("signature:{}",signature);
     try {
     Signature sig = Signature.getInstance("MD5WithRSA");
     sig.initVerify(cloudUserPublicKey);
     sig.update(token.getBytes(StandardCharsets.UTF_8));
     byte[]sigBytes = Base58.decode(signature);
     //                byte[]sigBytes = Base64.getDecoder().decode(signature);
     verified = sig.verify(sigBytes);
     } catch (SignatureException se) {
     se.printStackTrace();
     verified = false;
     } catch (NoSuchAlgorithmException e) {
     e.printStackTrace();
     verified = false;
     } catch (InvalidKeyException e) {
     e.printStackTrace();
     verified = false;
     }catch (IllegalArgumentException e){
     log.error("the provided data signature is not in well base64-urlencoded format!");
     verified = false;
     }
     if (verified) {
     log.info("\nSignature verified.");
     } else {
     log.warn("\nSignature did not match.");
     }
     */
    public static boolean verifyBase58Signature(String data, String signature, PublicKey publicKey){
        boolean verified = false;
        try {
            Signature sig = Signature.getInstance("MD5WithRSA");
            sig.initVerify(publicKey);
            sig.update(data.getBytes(SystemUtil.default_charSet));
            byte[]sigBytes = Base58.decode(signature);
            verified = sig.verify(sigBytes);
        } catch (SignatureException se) {
            se.printStackTrace();
            verified = false;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            verified = false;
        } catch (InvalidKeyException e) {
            e.printStackTrace();
            verified = false;
        }catch (IllegalArgumentException e){
            verified = false;
        } catch (UnsupportedEncodingException e) {
            verified = false;
        }
        return verified;
    }
    public static boolean verifyBase64Signature(String data, String signature, PublicKey publicKey){
        boolean verified = false;
        try {
            Signature sig = Signature.getInstance("MD5WithRSA");
            sig.initVerify(publicKey);
            sig.update(data.getBytes(SystemUtil.default_charSet));
            //byte[]sigBytes = Base58.decode(signature);
            byte[]sigBytes = Base64.getDecoder().decode(signature);
            verified = sig.verify(sigBytes);
        } catch (SignatureException se) {
            se.printStackTrace();
            verified = false;
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            verified = false;
        } catch (InvalidKeyException e) {
            e.printStackTrace();
            verified = false;
        }catch (IllegalArgumentException e){
            verified = false;
        } catch (UnsupportedEncodingException e) {
            verified = false;
        }
        return verified;
    }
}