sm2签名时z值不参与如何处理 about gmhelper HOT 5 CLOSED

    // org.bouncycastle.crypto.signers.SM2Signer

    public void init(boolean forSigning, CipherParameters param)
    {
        CipherParameters baseParam;
        byte[] userID;

        if (param instanceof ParametersWithID)
        {
            baseParam = ((ParametersWithID)param).getParameters();
            userID = ((ParametersWithID)param).getID();

            if (userID.length >= 8192)
            {
                throw new IllegalArgumentException("SM2 user ID must be less than 2^16 bits long");
            }
        }
        else
        {
            baseParam = param;
            // the default value, string value is "1234567812345678"
            userID = Hex.decodeStrict("31323334353637383132333435363738");
        }

        if (forSigning)
        {
            if (baseParam instanceof ParametersWithRandom)
            {
                ParametersWithRandom rParam = (ParametersWithRandom)baseParam;

                ecKey = (ECKeyParameters)rParam.getParameters();
                ecParams = ecKey.getParameters();
                kCalculator.init(ecParams.getN(), rParam.getRandom());
            }
            else
            {
                ecKey = (ECKeyParameters)baseParam;
                ecParams = ecKey.getParameters();
                kCalculator.init(ecParams.getN(), CryptoServicesRegistrar.getSecureRandom());
            }
            pubPoint = createBasePointMultiplier().multiply(ecParams.getG(), ((ECPrivateKeyParameters)ecKey).getD()).normalize();
        }
        else
        {
            ecKey = (ECKeyParameters)baseParam;
            ecParams = ecKey.getParameters();
            pubPoint = ((ECPublicKeyParameters)ecKey).getQ();
        }
        
        // TODO : 应该在这里加个if判断决定要不要执行后面的两行代码即可
        z = getZ(userID);
        digest.update(z, 0, z.length);
    }