package licence
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"time"
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)
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/*
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1.0.0 采集机器码, 授权日期 然后 AES 加密, 生成Licence, 秘钥会暴露给客户端
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1.0.1 修改为RSA 非对称加密, 公钥开放. 加密内容为{注册码{机器码+公司+邮箱+手机}+过期时间+授权时间}
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1.0.2 修改Licence文件内容最终为AES加密后的内容, 然后再由公钥解密. 上个版本的bug, 仅使用非对称加密, 用户可以替换公钥
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*/
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type RegisterCode struct {
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MachineCode string
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Company string
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Email string
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Phone string
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Version string
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}
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type Licence struct {
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RegCode RegisterCode
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Expires int64
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Timestamp int64
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}
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const (
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ValidationErrorDecrypt uint32 = iota + 1 // Licence is malformed
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ValidationErrorUnverifiableHost // Host unauthorized
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ValidationErrorExpired // Signature expired
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ValidationErrorMalformed
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Version = "1.0.2"
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aesKey = "www.aiotlink.com"
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)
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func GetRegisterCode(company, email, phone string) string {
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mCode := GetMachineCode()
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regCode := RegisterCode{mCode, company, email, phone, Version}
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json, _ := json.Marshal(regCode)
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return AESEncodeStr(json, aesKey)
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}
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func DecryptRegisterCode(regCode string) []byte {
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return AESDecodeStr(regCode, aesKey)
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}
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func GenerateLicence(regCode, timeOut string, privateKey []byte) (string, error) {
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timeLayout := "2006-01-02 15:04:05" //转化所需模板
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loc, _ := time.LoadLocation("Local") //获取时区
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tmp, _ := time.ParseInLocation(timeLayout, timeOut, loc)
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exp := tmp.Unix()
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now := time.Now().Unix()
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regCodeText := AESDecodeStr(regCode, aesKey)
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var registerCode RegisterCode
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if err := json.Unmarshal(regCodeText, ®isterCode); err != nil {
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return "", err
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}
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licence := Licence{registerCode, exp, now}
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json, err := json.Marshal(licence)
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if err != nil {
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return "", err
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}
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RSA := &RSASecurity{}
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if err := RSA.SetPrivateKey(privateKey); err != nil {
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return "", err
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}
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licenceHex, err := RSA.PriKeyENCTYPT(json)
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if err != nil {
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return "", err
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}
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return AESEncodeStr(licenceHex, aesKey), nil
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}
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func DecryptLicence(licencePath, publicKeyPath string) ([]byte, error) {
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var publicKey, licenceCode []byte
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var fdLic, fdPub *os.File
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var err error
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// 读取Licence File
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fdLic, err = os.Open(licencePath)
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if err != nil {
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return nil, err
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}
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defer fdLic.Close()
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licenceCode, err = ioutil.ReadAll(fdLic)
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if err != nil {
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return nil, err
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}
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// 读取公钥
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fdPub, err = os.Open(publicKeyPath)
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if err != nil {
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return nil, err
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}
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defer fdPub.Close()
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publicKey, err = ioutil.ReadAll(fdPub)
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if err != nil {
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return nil, err
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}
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RSA := &RSASecurity{}
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if err := RSA.SetPublicKey(publicKey); err != nil {
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return nil, err
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}
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licenceHex := AESDecodeStr(string(licenceCode), aesKey)
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return RSA.PubKeyDECRYPT(licenceHex)
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}
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func VerifyLicence(licencePath, publicKeyPath string) uint32 {
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licenceText, err := DecryptLicence(licencePath, publicKeyPath)
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if err != nil {
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return ValidationErrorDecrypt
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}
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var licence Licence
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if err := json.Unmarshal(licenceText, &licence); err != nil {
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return ValidationErrorMalformed
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}
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// 判断过期
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now := time.Now().Unix()
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if now > licence.Expires {
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return ValidationErrorExpired
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}
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// 判断机器码
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mCode := GetMachineCode()
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if licence.RegCode.MachineCode != mCode {
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return ValidationErrorUnverifiableHost
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}
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return 0
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}
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