code: private SM2 initCipherParams() {
  		try {
  			if (null != this.publicKey) {
  				this.publicKeyParams = (ECPublicKeyParameters) ECUtil.generatePublicKeyParameter(this.publicKey);
  			}
  			if (null != privateKey) {
  				this.privateKeyParams = (ECPrivateKeyParameters) ECUtil.generatePrivateKeyParameter(this.privateKey);
  			}
  		} catch (InvalidKeyException e) {
  			throw new CryptoException(e);
  		}
  
  		return this;
  	}
docs: 初始化加密解密参数
  
  @return this