check RSA Sign - Java Security

Java examples for Security:RSA

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Description

check RSA Sign

Demo Code


import javax.crypto.Cipher;
import java.math.BigInteger;
import java.security.*;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

public class Main{
    public static boolean checkSign(String content, String sign,
            String publicKey) {/*w w  w. j a v  a 2 s .  co  m*/
        try {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            byte[] encodedKey = Base64.decode2(publicKey);
            PublicKey pubKey = keyFactory
                    .generatePublic(new X509EncodedKeySpec(encodedKey));

            Signature signature = Signature.getInstance("SHA1WithRSA");

            signature.initVerify(pubKey);
            signature.update(content.getBytes("utf-8"));

            boolean bverify = signature.verify(Base64.decode2(sign));
            return bverify;

        } catch (Exception e) {
            e.printStackTrace();
        }

        return false;
    }
}

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