org.civis.blockchain.ssm.client.crypto.Sha256RSASigner Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ssm-sdk-client Show documentation

A SDK HTTP Client implementation to interact with signing state machines chaincode developped for Hyperleger Fabric.

The newest version!

package org.civis.blockchain.ssm.client.crypto;

import java.security.PrivateKey;
import java.security.Signature;
import java.util.Base64;

public class Sha256RSASigner {

    public static byte[] rsaSign(String plainText, PrivateKey key) throws Exception {
        Signature privateSignature = Signature.getInstance("SHA256withRSA");
        privateSignature.initSign(key);
        privateSignature.update(plainText.getBytes("UTF-8"));
        return privateSignature.sign();
    }

    public static String rsaSignAsB64(String plainText, PrivateKey key) throws Exception {
        byte[] value = rsaSign(plainText, key);
        return b64Encode(value);
    }

    private static String b64Encode(byte[] value) {
        return Base64.getEncoder().encodeToString(value);
    }

}