package secure

import (
	"encoding/base64"
	jsoniter "github.com/json-iterator/go"
	"github.com/nanjishidu/gomini/gocrypto"
)

type NetPackage struct {
	Body string `json:"body"`
	Key  string `json:"key"`
}

func Decrypt(text []byte) ([]byte, error) {
	np := NetPackage{}
	err := jsoniter.Unmarshal(text, &np)
	if err != nil {
		return nil, err
	}

	originalKey, _ := base64.StdEncoding.DecodeString(np.Key)
	key, err := gocrypto.RSADecrypt(originalKey, "credentials/app/server_rsa_private_key.pem")
	if err != nil {
		return nil, err
	}

	err = gocrypto.SetAesKey(string(key))
	if err != nil {
		return nil, err
	}

	originalBody, err := base64.StdEncoding.DecodeString(np.Body)
	if err != nil {
		return nil, err
	}

	body, err := gocrypto.AesECBDecrypt(originalBody)
	if err != nil {
		return nil, err
	}

	return body, nil
}