first commit
This commit is contained in:
yann
280
core/client.go
Normal file
280
core/client.go
Normal file
@@ -0,0 +1,280 @@
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package core
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import (
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"errors"
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uuid "github.com/satori/go.uuid"
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log "github.com/sirupsen/logrus"
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"github.com/skip2/go-qrcode"
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"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/model"
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"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/storage"
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"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/template"
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"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/util"
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"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
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"gopkg.in/gomail.v2"
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"io/ioutil"
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"os"
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"path/filepath"
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"sort"
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"strconv"
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"time"
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)
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// CreateClient client with all necessary data
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func CreateClient(client *model.Client) (*model.Client, error) {
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// check if client is valid
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errs := client.IsValid()
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if len(errs) != 0 {
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for _, err := range errs {
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log.WithFields(log.Fields{
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"err": err,
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}).Error("client validation error")
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}
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return nil, errors.New("failed to validate client")
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}
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u := uuid.NewV4()
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client.Id = u.String()
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key, err := wgtypes.GeneratePrivateKey()
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if err != nil {
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return nil, err
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}
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client.PrivateKey = key.String()
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client.PublicKey = key.PublicKey().String()
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presharedKey, err := wgtypes.GenerateKey()
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if err != nil {
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return nil, err
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}
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client.PresharedKey = presharedKey.String()
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reserverIps, err := GetAllReservedIps()
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if err != nil {
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return nil, err
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}
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ips := make([]string, 0)
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for _, network := range client.Address {
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ip, err := util.GetAvailableIp(network, reserverIps)
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if err != nil {
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return nil, err
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}
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if util.IsIPv6(ip) {
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ip = ip + "/128"
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} else {
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ip = ip + "/32"
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}
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ips = append(ips, ip)
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}
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client.Address = ips
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client.Created = time.Now().UTC()
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client.Updated = client.Created
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err = storage.Serialize(client.Id, client)
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if err != nil {
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return nil, err
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}
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v, err := storage.Deserialize(client.Id)
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if err != nil {
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return nil, err
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}
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client = v.(*model.Client)
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// data modified, dump new config
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return client, UpdateServerConfigWg()
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}
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// ReadClient client by id
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func ReadClient(id string) (*model.Client, error) {
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v, err := storage.Deserialize(id)
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if err != nil {
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return nil, err
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}
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client := v.(*model.Client)
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return client, nil
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}
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// UpdateClient preserve keys
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func UpdateClient(Id string, client *model.Client) (*model.Client, error) {
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v, err := storage.Deserialize(Id)
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if err != nil {
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return nil, err
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}
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current := v.(*model.Client)
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if current.Id != client.Id {
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return nil, errors.New("records Id mismatch")
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}
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// check if client is valid
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errs := client.IsValid()
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if len(errs) != 0 {
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for _, err := range errs {
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log.WithFields(log.Fields{
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"err": err,
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}).Error("client validation error")
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}
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return nil, errors.New("failed to validate client")
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}
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// keep keys
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client.PrivateKey = current.PrivateKey
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client.PublicKey = current.PublicKey
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client.Updated = time.Now().UTC()
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err = storage.Serialize(client.Id, client)
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if err != nil {
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return nil, err
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}
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v, err = storage.Deserialize(Id)
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if err != nil {
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return nil, err
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}
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client = v.(*model.Client)
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// data modified, dump new config
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return client, UpdateServerConfigWg()
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}
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// DeleteClient from disk
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func DeleteClient(id string) error {
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path := filepath.Join(os.Getenv("WG_CONF_DIR"), id)
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err := os.Remove(path)
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if err != nil {
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return err
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}
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// data modified, dump new config
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return UpdateServerConfigWg()
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}
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// ReadClients all clients
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func ReadClients() ([]*model.Client, error) {
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clients := make([]*model.Client, 0)
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files, err := ioutil.ReadDir(filepath.Join(os.Getenv("WG_CONF_DIR")))
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if err != nil {
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return nil, err
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}
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for _, f := range files {
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// clients file name is an uuid
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_, err := uuid.FromString(f.Name())
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if err == nil {
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c, err := storage.Deserialize(f.Name())
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if err != nil {
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log.WithFields(log.Fields{
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"err": err,
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"path": f.Name(),
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}).Error("failed to deserialize client")
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} else {
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clients = append(clients, c.(*model.Client))
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}
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}
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}
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sort.Slice(clients, func(i, j int) bool {
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return clients[i].Created.After(clients[j].Created)
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})
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return clients, nil
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}
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// ReadClientConfig in wg format
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func ReadClientConfig(id string) ([]byte, error) {
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client, err := ReadClient(id)
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if err != nil {
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return nil, err
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}
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server, err := ReadServer()
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if err != nil {
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return nil, err
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}
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configDataWg, err := template.DumpClientWg(client, server)
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if err != nil {
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return nil, err
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}
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return configDataWg, nil
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}
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// SendEmail to client
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func EmailClient(id string) error {
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client, err := ReadClient(id)
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if err != nil {
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return err
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}
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configData, err := ReadClientConfig(id)
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if err != nil {
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return err
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}
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// conf as .conf file
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tmpfileCfg, err := ioutil.TempFile("", "wireguard-vpn-*.conf")
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if err != nil {
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return err
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}
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if _, err := tmpfileCfg.Write(configData); err != nil {
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return err
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}
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if err := tmpfileCfg.Close(); err != nil {
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return err
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}
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defer os.Remove(tmpfileCfg.Name()) // clean up
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// conf as png image
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png, err := qrcode.Encode(string(configData), qrcode.Medium, 280)
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if err != nil {
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return err
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}
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tmpfilePng, err := ioutil.TempFile("", "qrcode-*.png")
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if err != nil {
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return err
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}
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if _, err := tmpfilePng.Write(png); err != nil {
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return err
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}
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if err := tmpfilePng.Close(); err != nil {
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return err
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}
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defer os.Remove(tmpfilePng.Name()) // clean up
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// get email body
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emailBody, err := template.DumpEmail(client, filepath.Base(tmpfilePng.Name()))
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if err != nil {
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return err
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}
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// port to int
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port, err := strconv.Atoi(os.Getenv("SMTP_PORT"))
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if err != nil {
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return err
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}
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d := gomail.NewDialer(os.Getenv("SMTP_HOST"), port, os.Getenv("SMTP_USERNAME"), os.Getenv("SMTP_PASSWORD"))
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s, err := d.Dial()
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if err != nil {
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return err
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}
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m := gomail.NewMessage()
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m.SetHeader("From", os.Getenv("SMTP_FROM"))
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m.SetAddressHeader("To", client.Email, client.Name)
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m.SetHeader("Subject", "WireGuard VPN Configuration")
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m.SetBody("text/html", string(emailBody))
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m.Attach(tmpfileCfg.Name())
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m.Embed(tmpfilePng.Name())
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err = gomail.Send(s, m)
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if err != nil {
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return err
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}
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return nil
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}
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