org.bcos.web3j.crypto.sm2.SM2Sign Maven / Gradle / Ivy

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package org.bcos.web3j.crypto.sm2;

import org.bcos.web3j.crypto.ECKeyPair;
import org.bcos.web3j.crypto.Hash;
import org.bcos.web3j.crypto.SignInterface;
import org.bouncycastle.asn1.*;
import org.bcos.web3j.crypto.sm2.crypto.asymmetric.SM2Algorithm;
import org.bcos.web3j.crypto.sm2.util.encoders.Hex;
import org.bcos.web3j.crypto.sm3.SM3Digest;
import org.bcos.web3j.utils.Numeric;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.bcos.web3j.crypto.Sign;

import java.io.IOException;
import java.math.BigInteger;

import static org.bcos.web3j.crypto.sm2.crypto.asymmetric.SM2Algorithm.getEncoded;

/**
 * Created by websterchen on 2018/3/22.
 */
public class SM2Sign implements SignInterface {
    static Logger logger = LoggerFactory.getLogger(SM2Sign.class);
    @Override
    public Sign.SignatureData signMessage(byte[] message, ECKeyPair keyPair){
        return sign(message,keyPair);
    }

    public static Sign.SignatureData sign(byte[] message,ECKeyPair ecKeyPair){
        SM3Digest sm3Digest = new SM3Digest();
        BigInteger[] rs = null;
        byte[] r = null;
        byte[] s = null;
        byte[] pub = null;
        byte v = 0;
        byte[] messageHash = sm3Digest.hash(message);
        try {
            byte []signByte = SM2Algorithm.sign(messageHash,ecKeyPair.getPrivateKey());
            logger.debug("signData:{}",signByte);
            //System.out.println("signData:" + Hex.toHexString(signByte));
            ASN1Sequence as = (ASN1Sequence) ASN1Primitive.fromByteArray(signByte);
            rs = new BigInteger[] {
                    ((ASN1Integer)as.getObjectAt(0)).getValue(),
                    ((ASN1Integer)as.getObjectAt(1)).getValue()
            };
        }catch (IOException ex){
            logger.error("SM2 Sign ERROR");
        }
        if (rs != null){
            r = SM2Algorithm.getEncoded(rs[0]);
            s = SM2Algorithm.getEncoded(rs[1]);
            /*System.out.println("publicKey:" + Hex.toHexString(Numeric.toBytesPadded(ecKeyPair.getPublicKey(),64)));
            System.out.println("publicKeyLen:" + ecKeyPair.getPublicKey().bitLength());
            System.out.println("privateKey:" + Hex.toHexString(Numeric.toBytesPadded(ecKeyPair.getPrivateKey(),32)));
            System.out.println("privateKey:" + ecKeyPair.getPrivateKey().bitLength());*/
            pub = Numeric.toBytesPadded(ecKeyPair.getPublicKey(),64);
            logger.debug("SM2 SignPublic:{},SM2SignPublicLen:{}",Hex.toHexString(pub),pub.length);
            logger.debug("SM2 SignR:{},SM2SignRLen{}",Hex.toHexString(r),r.length);
            logger.debug("SM2 SignS:{},SM2SignSLen{}",Hex.toHexString(s),s.length);
            //System.out.println("SM2 SignPublic:" + Hex.toHexString(pub));
        }
        return new Sign.SignatureData(v, r, s,pub);
    }
}