mirror of
https://github.com/flant/ovpn-admin.git
synced 2024-12-12 08:44:07 +02:00
1105 lines
36 KiB
Go
1105 lines
36 KiB
Go
package main
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import (
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"bufio"
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"bytes"
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"encoding/json"
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"fmt"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"gopkg.in/alecthomas/kingpin.v2"
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"log"
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"net"
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"net/http"
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"os"
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"regexp"
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"strconv"
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"strings"
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"text/template"
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"time"
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)
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const (
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usernameRegexp = `^([a-zA-Z0-9_.-@])+$`
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passwordRegexp = `^([a-zA-Z0-9_.-@])+$`
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passwordMinLength = 6
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downloadCertsApiUrl = "/api/data/certs/download"
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downloadCcdApiUrl = "/api/data/ccd/download"
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certsArchiveFileName = "certs.tar.gz"
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ccdArchiveFileName = "ccd.tar.gz"
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indexTxtDateLayout = "060102150405Z"
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stringDateFormat = "2006-01-02 15:04:05"
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ovpnStatusDateLayout = "2006-01-02 15:04:05"
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version = "1.5.1"
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)
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var (
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listenHost = kingpin.Flag("listen.host","host for openvpn-admin").Default("0.0.0.0").String()
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listenPort = kingpin.Flag("listen.port","port for openvpn-admin").Default("8080").String()
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serverRole = kingpin.Flag("role","server role master or slave").Default("master").HintOptions("master", "slave").String()
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masterHost = kingpin.Flag("master.host","url for master server").Default("http://127.0.0.1").String()
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masterBasicAuthUser = kingpin.Flag("master.basic-auth.user","user for basic auth on master server url").Default("").String()
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masterBasicAuthPassword = kingpin.Flag("master.basic-auth.password","password for basic auth on master server url").Default("").String()
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masterSyncFrequency = kingpin.Flag("master.sync-frequency", "master host data sync frequency in seconds.").Default("600").Int()
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masterSyncToken = kingpin.Flag("master.sync-token", "master host data sync security token").Default("justasimpleword").PlaceHolder("TOKEN").String()
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openvpnServer = kingpin.Flag("ovpn.server","comma separated addresses for openvpn servers").Default("127.0.0.1:7777:tcp").PlaceHolder("HOST:PORT:PROTOCOL").Strings()
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openvpnNetwork = kingpin.Flag("ovpn.network","network for openvpn server").Default("172.16.100.0/24").String()
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mgmtAddress = kingpin.Flag("mgmt","comma separated (alias=address) for openvpn servers mgmt interfaces").Default("main=127.0.0.1:8989").Strings()
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metricsPath = kingpin.Flag("metrics.path", "URL path for surfacing collected metrics").Default("/metrics").String()
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easyrsaDirPath = kingpin.Flag("easyrsa.path", "path to easyrsa dir").Default("/mnt/easyrsa").String()
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indexTxtPath = kingpin.Flag("easyrsa.index-path", "path to easyrsa index file.").Default("/mnt/easyrsa/pki/index.txt").String()
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ccdDir = kingpin.Flag("ccd.path", "path to client-config-dir").Default("/mnt/ccd").String()
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authByPassword = kingpin.Flag("auth.password", "Enable additional password authorization.").Default("false").Bool()
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authDatabase = kingpin.Flag("auth.db", "Database path fort password authorization.").Default("/mnt/easyrsa/pki/users.db").String()
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staticPath = kingpin.Flag("static.path", "path to static dir").Default("./static").String()
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debug = kingpin.Flag("debug", "Enable debug mode.").Default("false").Bool()
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verbose = kingpin.Flag("verbose", "Enable verbose mode.").Default("false").Bool()
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certsArchivePath = "/tmp/" + certsArchiveFileName
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ccdArchivePath = "/tmp/" + ccdArchiveFileName
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)
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var (
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ovpnServerCertExpire = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_server_cert_expire",
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Help: "openvpn server certificate expire time in days",
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},
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)
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ovpnServerCaCertExpire = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_server_ca_cert_expire",
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Help: "openvpn server CA certificate expire time in days",
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},
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)
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ovpnClientsTotal = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_clients_total",
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Help: "total openvpn users",
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},
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)
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ovpnClientsRevoked = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_clients_revoked",
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Help: "revoked openvpn users",
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},
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)
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ovpnClientsExpired = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_clients_expired",
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Help: "expired openvpn users",
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},
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)
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ovpnClientsConnected = prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "ovpn_clients_connected",
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Help: "connected openvpn users",
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},
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)
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ovpnClientCertificateExpire = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Name: "ovpn_client_cert_expire",
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Help: "openvpn user certificate expire time in days",
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},
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[]string{"client"},
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)
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ovpnClientConnectionInfo = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Name: "ovpn_client_connection_info",
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Help: "openvpn user connection info. ip - assigned address from ovpn network. value - last time when connection was refreshed in unix format",
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},
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[]string{"client", "ip"},
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)
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ovpnClientConnectionFrom = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Name: "ovpn_client_connection_from",
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Help: "openvpn user connection info. ip - from which address connection was initialized. value - time when connection was initialized in unix format",
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},
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[]string{"client", "ip"},
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)
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ovpnClientBytesReceived = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Name: "ovpn_client_bytes_received",
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Help: "openvpn user bytes received",
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},
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[]string{"client"},
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)
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ovpnClientBytesSent = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Name: "ovpn_client_bytes_sent",
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Help: "openvpn user bytes sent",
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},
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[]string{"client"},
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)
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)
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type OpenvpnAdmin struct {
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role string
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lastSyncTime string
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lastSuccessfulSyncTime string
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masterHostBasicAuth bool
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masterSyncToken string
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clients []OpenvpnClient
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activeClients []clientStatus
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promRegistry *prometheus.Registry
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mgmtInterfaces map[string]string
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}
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type OpenvpnServer struct {
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Host string
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Port string
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Protocol string
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}
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type openvpnClientConfig struct {
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Hosts []OpenvpnServer
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CA string
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Cert string
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Key string
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TLS string
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PasswdAuth bool
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}
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type OpenvpnClient struct {
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Identity string `json:"Identity"`
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AccountStatus string `json:"AccountStatus"`
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ExpirationDate string `json:"ExpirationDate"`
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RevocationDate string `json:"RevocationDate"`
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ConnectionStatus string `json:"ConnectionStatus"`
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ConnectionServer string `json:"ConnectionServer"`
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}
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type ccdRoute struct {
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Address string `json:"Address"`
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Mask string `json:"Mask"`
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Description string `json:"Description"`
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}
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type Ccd struct {
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User string `json:"User"`
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ClientAddress string `json:"ClientAddress"`
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CustomRoutes []ccdRoute `json:"CustomRoutes"`
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}
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type indexTxtLine struct {
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Flag string
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ExpirationDate string
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RevocationDate string
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SerialNumber string
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Filename string
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DistinguishedName string
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Identity string
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}
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type clientStatus struct {
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CommonName string
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RealAddress string
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BytesReceived string
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BytesSent string
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ConnectedSince string
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VirtualAddress string
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LastRef string
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ConnectedSinceFormatted string
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LastRefFormatted string
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ConnectedTo string
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}
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func (oAdmin *OpenvpnAdmin) userListHandler(w http.ResponseWriter, r *http.Request) {
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usersList, _ := json.Marshal(oAdmin.clients)
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fmt.Fprintf(w, "%s", usersList)
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}
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func (oAdmin *OpenvpnAdmin) userStatisticHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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userStatistic, _ := json.Marshal(oAdmin.getUserStatistic(r.FormValue("username")))
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fmt.Fprintf(w, "%s", userStatistic)
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}
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func (oAdmin *OpenvpnAdmin) userCreateHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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r.ParseForm()
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userCreated, userCreateStatus := oAdmin.userCreate(r.FormValue("username"), r.FormValue("password"))
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if userCreated {
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w.WriteHeader(http.StatusOK)
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fmt.Fprintf(w, userCreateStatus)
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return
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} else {
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http.Error(w, userCreateStatus, http.StatusUnprocessableEntity)
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}
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}
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func (oAdmin *OpenvpnAdmin) userRevokeHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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r.ParseForm()
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fmt.Fprintf(w, "%s", oAdmin.userRevoke(r.FormValue("username")))
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}
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func (oAdmin *OpenvpnAdmin) userUnrevokeHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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r.ParseForm()
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fmt.Fprintf(w, "%s", oAdmin.userUnrevoke(r.FormValue("username")))
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}
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func (oAdmin *OpenvpnAdmin) userChangePasswordHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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if *authByPassword {
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passwordChanged, passwordChangeMessage := oAdmin.userChangePassword(r.FormValue("username"), r.FormValue("password"))
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if passwordChanged {
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w.WriteHeader(http.StatusOK)
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fmt.Fprintf(w, `{"status":"ok", "message": "%s"}`, passwordChangeMessage)
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return
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, `{"status":"error", "message": "%s"}`, passwordChangeMessage)
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return
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}
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} else {
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http.Error(w, `{"status":"error"}`, http.StatusNotImplemented )
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}
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}
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func (oAdmin *OpenvpnAdmin) userShowConfigHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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fmt.Fprintf(w, "%s", oAdmin.renderClientConfig(r.FormValue("username")))
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}
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func (oAdmin *OpenvpnAdmin) userDisconnectHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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// fmt.Fprintf(w, "%s", userDisconnect(r.FormValue("username")))
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fmt.Fprintf(w, "%s", r.FormValue("username"))
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}
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func (oAdmin *OpenvpnAdmin) userShowCcdHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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ccd, _ := json.Marshal(oAdmin.getCcd(r.FormValue("username")))
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fmt.Fprintf(w, "%s", ccd)
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}
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func (oAdmin *OpenvpnAdmin) userApplyCcdHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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var ccd Ccd
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if r.Body == nil {
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http.Error(w, "Please send a request body", http.StatusBadRequest)
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return
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}
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err := json.NewDecoder(r.Body).Decode(&ccd)
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if err != nil {
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log.Println(err)
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}
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ccdApplied, applyStatus := oAdmin.modifyCcd(ccd)
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if ccdApplied {
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w.WriteHeader(http.StatusOK)
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fmt.Fprintf(w, applyStatus)
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return
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} else {
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http.Error(w, applyStatus, http.StatusUnprocessableEntity)
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}
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}
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func (oAdmin *OpenvpnAdmin) serverRoleHandler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, `{"status":"ok", "serverRole": "%s" }`, oAdmin.role)
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}
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func (oAdmin *OpenvpnAdmin) lastSyncTimeHandler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprint(w, oAdmin.lastSyncTime)
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}
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func (oAdmin *OpenvpnAdmin) lastSuccessfulSyncTimeHandler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprint(w, oAdmin.lastSuccessfulSyncTime)
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}
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func (oAdmin *OpenvpnAdmin) downloadCertsHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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r.ParseForm()
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token := r.Form.Get("token")
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if token != oAdmin.masterSyncToken {
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http.Error(w, `{"status":"error"}`, http.StatusForbidden)
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return
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}
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archiveCerts()
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w.Header().Set("Content-Disposition", "attachment; filename=" + certsArchiveFileName)
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http.ServeFile(w,r, certsArchivePath)
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}
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func (oAdmin *OpenvpnAdmin) downloadCcdHandler(w http.ResponseWriter, r *http.Request) {
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if oAdmin.role == "slave" {
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http.Error(w, `{"status":"error"}`, http.StatusLocked)
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return
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}
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r.ParseForm()
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token := r.Form.Get("token")
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if token != oAdmin.masterSyncToken {
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http.Error(w, `{"status":"error"}`, http.StatusForbidden)
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return
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}
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archiveCcd()
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w.Header().Set("Content-Disposition", "attachment; filename=" + ccdArchiveFileName)
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http.ServeFile(w,r, ccdArchivePath)
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}
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func main() {
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kingpin.Version(version)
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kingpin.Parse()
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ovpnAdmin := new(OpenvpnAdmin)
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ovpnAdmin.lastSyncTime = "unknown"
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ovpnAdmin.role = *serverRole
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ovpnAdmin.lastSuccessfulSyncTime = "unknown"
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ovpnAdmin.masterSyncToken = *masterSyncToken
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ovpnAdmin.promRegistry = prometheus.NewRegistry()
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ovpnAdmin.mgmtInterfaces = make(map[string]string)
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for _, mgmtInterface := range *mgmtAddress {
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parts := strings.SplitN(mgmtInterface, "=",2)
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ovpnAdmin.mgmtInterfaces[parts[0]] = parts[len(parts)-1]
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}
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ovpnAdmin.registerMetrics()
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ovpnAdmin.setState()
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go ovpnAdmin.updateState()
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if *masterBasicAuthPassword != "" && *masterBasicAuthUser != "" {
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ovpnAdmin.masterHostBasicAuth = true
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} else {
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ovpnAdmin.masterHostBasicAuth = false
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}
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if ovpnAdmin.role == "slave" {
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ovpnAdmin.syncDataFromMaster()
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go ovpnAdmin.syncWithMaster()
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}
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fs := CacheControlWrapper(http.FileServer(http.Dir(*staticPath)))
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http.Handle("/", fs)
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http.HandleFunc("/api/server/role", ovpnAdmin.serverRoleHandler)
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http.HandleFunc("/api/users/list", ovpnAdmin.userListHandler)
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http.HandleFunc("/api/user/create", ovpnAdmin.userCreateHandler)
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http.HandleFunc("/api/user/change-password", ovpnAdmin.userChangePasswordHandler)
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http.HandleFunc("/api/user/revoke", ovpnAdmin.userRevokeHandler)
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http.HandleFunc("/api/user/unrevoke", ovpnAdmin.userUnrevokeHandler)
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http.HandleFunc("/api/user/config/show", ovpnAdmin.userShowConfigHandler)
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http.HandleFunc("/api/user/disconnect", ovpnAdmin.userDisconnectHandler)
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http.HandleFunc("/api/user/statistic", ovpnAdmin.userStatisticHandler)
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http.HandleFunc("/api/user/ccd", ovpnAdmin.userShowCcdHandler)
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http.HandleFunc("/api/user/ccd/apply", ovpnAdmin.userApplyCcdHandler)
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http.HandleFunc("/api/sync/last/try", ovpnAdmin.lastSyncTimeHandler)
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http.HandleFunc("/api/sync/last/successful", ovpnAdmin.lastSuccessfulSyncTimeHandler)
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http.HandleFunc(downloadCertsApiUrl, ovpnAdmin.downloadCertsHandler)
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http.HandleFunc(downloadCcdApiUrl, ovpnAdmin.downloadCcdHandler)
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http.Handle(*metricsPath, promhttp.HandlerFor(ovpnAdmin.promRegistry, promhttp.HandlerOpts{}))
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http.HandleFunc("/ping", func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "pong")
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})
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fmt.Println("Bind: http://" + *listenHost + ":" + *listenPort)
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log.Fatal(http.ListenAndServe(*listenHost + ":" + *listenPort, nil))
|
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}
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func CacheControlWrapper(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
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w.Header().Set("Cache-Control", "max-age=2592000") // 30 days
|
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h.ServeHTTP(w, r)
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})
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}
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|
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func (oAdmin *OpenvpnAdmin) registerMetrics() {
|
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oAdmin.promRegistry.MustRegister(ovpnServerCertExpire)
|
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oAdmin.promRegistry.MustRegister(ovpnServerCaCertExpire)
|
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oAdmin.promRegistry.MustRegister(ovpnClientsTotal)
|
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oAdmin.promRegistry.MustRegister(ovpnClientsRevoked)
|
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oAdmin.promRegistry.MustRegister(ovpnClientsConnected)
|
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oAdmin.promRegistry.MustRegister(ovpnClientsExpired)
|
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oAdmin.promRegistry.MustRegister(ovpnClientCertificateExpire)
|
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oAdmin.promRegistry.MustRegister(ovpnClientConnectionInfo)
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oAdmin.promRegistry.MustRegister(ovpnClientConnectionFrom)
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oAdmin.promRegistry.MustRegister(ovpnClientBytesReceived)
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oAdmin.promRegistry.MustRegister(ovpnClientBytesSent)
|
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}
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|
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func (oAdmin *OpenvpnAdmin) setState() {
|
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oAdmin.activeClients = oAdmin.mgmtGetActiveClients()
|
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oAdmin.clients = oAdmin.usersList()
|
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|
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ovpnServerCaCertExpire.Set(float64((getOvpnCaCertExpireDate().Unix() - time.Now().Unix()) / 3600 / 24))
|
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}
|
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|
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func (oAdmin *OpenvpnAdmin) updateState() {
|
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for {
|
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time.Sleep(time.Duration(28) * time.Second)
|
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ovpnClientBytesSent.Reset()
|
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ovpnClientBytesReceived.Reset()
|
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ovpnClientConnectionFrom.Reset()
|
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ovpnClientConnectionInfo.Reset()
|
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go oAdmin.setState()
|
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}
|
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}
|
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|
|
func indexTxtParser(txt string) []indexTxtLine {
|
|
var indexTxt []indexTxtLine
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|
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txtLinesArray := strings.Split(txt, "\n")
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|
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for _, v := range txtLinesArray {
|
|
str := strings.Fields(v)
|
|
if len(str) > 0 {
|
|
switch {
|
|
// case strings.HasPrefix(str[0], "E"):
|
|
case strings.HasPrefix(str[0], "V"):
|
|
indexTxt = append(indexTxt, indexTxtLine{Flag: str[0], ExpirationDate: str[1], SerialNumber: str[2], Filename: str[3], DistinguishedName: str[4], Identity: str[4][strings.Index(str[4], "=")+1:]})
|
|
case strings.HasPrefix(str[0], "R"):
|
|
indexTxt = append(indexTxt, indexTxtLine{Flag: str[0], ExpirationDate: str[1], RevocationDate: str[2], SerialNumber: str[3], Filename: str[4], DistinguishedName: str[5], Identity: str[5][strings.Index(str[5], "=")+1:]})
|
|
}
|
|
}
|
|
}
|
|
|
|
return indexTxt
|
|
}
|
|
|
|
func renderIndexTxt(data []indexTxtLine) string {
|
|
indexTxt := ""
|
|
for _, line := range data {
|
|
switch {
|
|
case line.Flag == "V":
|
|
indexTxt += fmt.Sprintf("%s\t%s\t\t%s\t%s\t%s\n", line.Flag, line.ExpirationDate, line.SerialNumber, line.Filename, line.DistinguishedName)
|
|
case line.Flag == "R":
|
|
indexTxt += fmt.Sprintf("%s\t%s\t%s\t%s\t%s\t%s\n", line.Flag, line.ExpirationDate, line.RevocationDate, line.SerialNumber, line.Filename, line.DistinguishedName)
|
|
// case line.flag == "E":
|
|
}
|
|
}
|
|
return indexTxt
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) renderClientConfig(username string) string {
|
|
if checkUserExist(username) {
|
|
var hosts []OpenvpnServer
|
|
|
|
for _, server := range *openvpnServer {
|
|
parts := strings.SplitN(server, ":",3)
|
|
hosts = append(hosts, OpenvpnServer{Host: parts[0], Port: parts[1], Protocol: parts[2]})
|
|
}
|
|
|
|
conf := openvpnClientConfig{}
|
|
conf.Hosts = hosts
|
|
conf.CA = fRead(*easyrsaDirPath + "/pki/ca.crt")
|
|
conf.Cert = fRead(*easyrsaDirPath + "/pki/issued/" + username + ".crt")
|
|
conf.Key = fRead(*easyrsaDirPath + "/pki/private/" + username + ".key")
|
|
conf.TLS = fRead(*easyrsaDirPath + "/pki/ta.key")
|
|
conf.PasswdAuth = *authByPassword
|
|
|
|
t, _ := template.ParseFiles("client.conf.tpl")
|
|
var tmp bytes.Buffer
|
|
err := t.Execute(&tmp, conf)
|
|
if err != nil {
|
|
log.Printf("WARNING: something goes wrong during rendering config for %s", username )
|
|
}
|
|
|
|
hosts = nil
|
|
|
|
fmt.Printf("%+v\n", tmp.String())
|
|
return fmt.Sprintf("%+v\n", tmp.String())
|
|
}
|
|
fmt.Printf("User \"%s\" not found", username)
|
|
return fmt.Sprintf("User \"%s\" not found", username)
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) parseCcd(username string) Ccd {
|
|
ccd := Ccd{}
|
|
ccd.User = username
|
|
ccd.ClientAddress = "dynamic"
|
|
ccd.CustomRoutes = []ccdRoute{}
|
|
|
|
txtLinesArray := strings.Split(fRead(*ccdDir + "/" + username), "\n")
|
|
|
|
for _, v := range txtLinesArray {
|
|
str := strings.Fields(v)
|
|
if len(str) > 0 {
|
|
switch {
|
|
case strings.HasPrefix(str[0], "ifconfig-push"):
|
|
ccd.ClientAddress = str[1]
|
|
case strings.HasPrefix(str[0], "push"):
|
|
ccd.CustomRoutes = append(ccd.CustomRoutes, ccdRoute{Address: strings.Trim(str[2], "\""), Mask: strings.Trim(str[3], "\""), Description: strings.Trim(strings.Join(str[4:], ""), "#")})
|
|
}
|
|
}
|
|
}
|
|
|
|
return ccd
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) modifyCcd(ccd Ccd) (bool, string) {
|
|
ccdErr := "something goes wrong"
|
|
|
|
if fCreate(*ccdDir + "/" + ccd.User) {
|
|
ccdValid, ccdErr := validateCcd(ccd)
|
|
if ccdErr != "" {
|
|
return false, ccdErr
|
|
}
|
|
|
|
if ccdValid {
|
|
t, _ := template.ParseFiles("ccd.tpl")
|
|
var tmp bytes.Buffer
|
|
tplErr := t.Execute(&tmp, ccd)
|
|
if tplErr != nil {
|
|
log.Println(tplErr)
|
|
}
|
|
fWrite(*ccdDir + "/" + ccd.User, tmp.String())
|
|
return true, "ccd updated successfully"
|
|
}
|
|
}
|
|
|
|
return false, ccdErr
|
|
}
|
|
|
|
func validateCcd(ccd Ccd) (bool, string) {
|
|
ccdErr := ""
|
|
|
|
if ccd.ClientAddress != "dynamic" {
|
|
_, ovpnNet, err := net.ParseCIDR(*openvpnNetwork)
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
|
|
if ! checkStaticAddressIsFree(ccd.ClientAddress, ccd.User) {
|
|
ccdErr = fmt.Sprintf("ClientAddress \"%s\" already assigned to another user", ccd.ClientAddress)
|
|
if *debug {
|
|
log.Printf("ERROR: Modify ccd for user %s: %s", ccd.User, ccdErr)
|
|
}
|
|
return false, ccdErr
|
|
}
|
|
|
|
if net.ParseIP(ccd.ClientAddress) == nil {
|
|
ccdErr = fmt.Sprintf("ClientAddress \"%s\" not a valid IP address", ccd.ClientAddress)
|
|
if *debug {
|
|
log.Printf("ERROR: Modify ccd for user %s: %s", ccd.User, ccdErr)
|
|
}
|
|
return false, ccdErr
|
|
}
|
|
|
|
if ! ovpnNet.Contains(net.ParseIP(ccd.ClientAddress)) {
|
|
ccdErr = fmt.Sprintf("ClientAddress \"%s\" not belongs to openvpn server network", ccd.ClientAddress)
|
|
if *debug {
|
|
log.Printf("ERROR: Modify ccd for user %s: %s", ccd.User, ccdErr)
|
|
}
|
|
return false, ccdErr
|
|
}
|
|
}
|
|
|
|
for _, route := range ccd.CustomRoutes {
|
|
if net.ParseIP(route.Address) == nil {
|
|
ccdErr = fmt.Sprintf("CustomRoute.Address \"%s\" must be a valid IP address", route.Address)
|
|
if *debug {
|
|
log.Printf("ERROR: Modify ccd for user %s: %s", ccd.User, ccdErr)
|
|
}
|
|
return false, ccdErr
|
|
}
|
|
|
|
if net.ParseIP(route.Mask) == nil {
|
|
ccdErr = fmt.Sprintf("CustomRoute.Mask \"%s\" must be a valid IP address", route.Mask)
|
|
if *debug {
|
|
log.Printf("ERROR: Modify ccd for user %s: %s", ccd.User, ccdErr)
|
|
}
|
|
return false, ccdErr
|
|
}
|
|
}
|
|
|
|
return true, ccdErr
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) getCcd(username string) Ccd {
|
|
ccd := Ccd{}
|
|
ccd.User = username
|
|
ccd.ClientAddress = "dynamic"
|
|
ccd.CustomRoutes = []ccdRoute{}
|
|
|
|
if fCreate(*ccdDir + "/" + username) {
|
|
ccd = oAdmin.parseCcd(username)
|
|
}
|
|
return ccd
|
|
}
|
|
|
|
func checkStaticAddressIsFree(staticAddress string, username string) bool {
|
|
o := runBash(fmt.Sprintf("grep -rl %s %s | grep -vx %s/%s | wc -l", staticAddress, *ccdDir, *ccdDir, username))
|
|
|
|
if strings.TrimSpace(o) == "0" {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func validateUsername(username string) bool {
|
|
var validUsername = regexp.MustCompile(usernameRegexp)
|
|
return validUsername.MatchString(username)
|
|
}
|
|
|
|
func validatePassword(password string) bool {
|
|
if len(password) < passwordMinLength {
|
|
return false
|
|
} else {
|
|
return true
|
|
}
|
|
}
|
|
|
|
func checkUserExist(username string) bool {
|
|
for _, u := range indexTxtParser(fRead(*indexTxtPath)) {
|
|
if u.DistinguishedName == ("/CN=" + username) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) usersList() []OpenvpnClient {
|
|
var users []OpenvpnClient
|
|
|
|
totalCerts := 0
|
|
validCerts := 0
|
|
revokedCerts := 0
|
|
expiredCerts := 0
|
|
connectedUsers := 0
|
|
apochNow := time.Now().Unix()
|
|
|
|
for _, line := range indexTxtParser(fRead(*indexTxtPath)) {
|
|
if line.Identity != "server" {
|
|
totalCerts += 1
|
|
ovpnClient := OpenvpnClient{Identity: line.Identity, ExpirationDate: parseDateToString(indexTxtDateLayout, line.ExpirationDate, stringDateFormat)}
|
|
switch {
|
|
case line.Flag == "V":
|
|
ovpnClient.AccountStatus = "Active"
|
|
ovpnClientCertificateExpire.WithLabelValues(line.Identity).Set(float64((parseDateToUnix(indexTxtDateLayout, line.ExpirationDate) - apochNow) / 3600 / 24))
|
|
validCerts += 1
|
|
case line.Flag == "R":
|
|
ovpnClient.AccountStatus = "Revoked"
|
|
ovpnClient.RevocationDate = parseDateToString(indexTxtDateLayout, line.RevocationDate, stringDateFormat)
|
|
ovpnClientCertificateExpire.WithLabelValues(line.Identity).Set(float64((parseDateToUnix(indexTxtDateLayout, line.ExpirationDate) - apochNow) / 3600 / 24))
|
|
revokedCerts += 1
|
|
case line.Flag == "E":
|
|
ovpnClient.AccountStatus = "Expired"
|
|
ovpnClientCertificateExpire.WithLabelValues(line.Identity).Set(float64((parseDateToUnix(indexTxtDateLayout, line.ExpirationDate) - apochNow) / 3600 / 24))
|
|
expiredCerts += 1
|
|
}
|
|
|
|
ovpnClient.ConnectionServer = ""
|
|
|
|
userConnected, userConnectedTo := isUserConnected(line.Identity, oAdmin.activeClients)
|
|
if userConnected {
|
|
ovpnClient.ConnectionStatus = "Connected"
|
|
ovpnClient.ConnectionServer = userConnectedTo
|
|
connectedUsers += 1
|
|
}
|
|
|
|
users = append(users, ovpnClient)
|
|
|
|
} else {
|
|
ovpnServerCertExpire.Set(float64((parseDateToUnix(indexTxtDateLayout, line.ExpirationDate) - apochNow) / 3600 / 24))
|
|
}
|
|
}
|
|
|
|
otherCerts := totalCerts - validCerts - revokedCerts - expiredCerts
|
|
|
|
if otherCerts != 0 {
|
|
log.Printf("WARNING: there are %d otherCerts", otherCerts)
|
|
}
|
|
|
|
ovpnClientsTotal.Set(float64(totalCerts))
|
|
ovpnClientsRevoked.Set(float64(revokedCerts))
|
|
ovpnClientsExpired.Set(float64(expiredCerts))
|
|
ovpnClientsConnected.Set(float64(connectedUsers))
|
|
|
|
return users
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) userCreate(username, password string) (bool, string) {
|
|
ucErr := fmt.Sprintf("User \"%s\" created", username)
|
|
|
|
if checkUserExist(username) {
|
|
ucErr = fmt.Sprintf("User \"%s\" already exists\n", username)
|
|
if *debug {
|
|
log.Printf("ERROR: userCreate: %s", ucErr)
|
|
}
|
|
return false, ucErr
|
|
}
|
|
|
|
if ! validateUsername(username) {
|
|
ucErr = fmt.Sprintf("Username \"%s\" incorrect, you can use only %s\n", username, usernameRegexp)
|
|
if *debug {
|
|
log.Printf("ERROR: userCreate: %s", ucErr)
|
|
}
|
|
return false, ucErr
|
|
}
|
|
|
|
if ! validatePassword(password) {
|
|
ucErr = fmt.Sprintf("Password too short, password length must be greater or equal %d", passwordMinLength)
|
|
if *debug {
|
|
log.Printf("ERROR: userCreate: %s\n", ucErr)
|
|
}
|
|
return false, ucErr
|
|
}
|
|
|
|
o := runBash(fmt.Sprintf("date +%%Y-%%m-%%d\\ %%H:%%M:%%S && cd %s && easyrsa build-client-full %s nopass", *easyrsaDirPath, username))
|
|
fmt.Println(o)
|
|
|
|
if *authByPassword {
|
|
o = runBash(fmt.Sprintf("openvpn-user create --db.path %s --user %s --password %s", *authDatabase, username, password))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
if *verbose {
|
|
log.Printf("INFO: user created: %s", username)
|
|
}
|
|
|
|
oAdmin.clients = oAdmin.usersList()
|
|
|
|
return true, ucErr
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) userChangePassword(username, password string) (bool, string) {
|
|
|
|
if checkUserExist(username) {
|
|
o := runBash(fmt.Sprintf("openvpn-user check --db.path %s --user %s | grep %s | wc -l", *authDatabase, username, username))
|
|
fmt.Println(o)
|
|
|
|
if ! validatePassword(password) {
|
|
ucpErr := fmt.Sprintf("Password for too short, password length must be greater or equal %d", passwordMinLength)
|
|
if *debug {
|
|
log.Printf("ERROR: userChangePassword: %s\n", ucpErr)
|
|
}
|
|
return false, ucpErr
|
|
}
|
|
|
|
if strings.TrimSpace(o) == "0" {
|
|
fmt.Println("Creating user in users.db")
|
|
o = runBash(fmt.Sprintf("openvpn-user create --db.path %s --user %s --password %s", *authDatabase, username, password))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
o = runBash(fmt.Sprintf("openvpn-user change-password --db.path %s --user %s --password %s", *authDatabase, username, password))
|
|
fmt.Println(o)
|
|
|
|
if *verbose {
|
|
log.Printf("INFO: password for user %s was changed", username)
|
|
}
|
|
return true, "Password changed"
|
|
}
|
|
|
|
return false, "User does not exist"
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) getUserStatistic(username string) clientStatus {
|
|
for _, u := range oAdmin.activeClients {
|
|
if u.CommonName == username {
|
|
return u
|
|
}
|
|
}
|
|
return clientStatus{}
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) userRevoke(username string) string {
|
|
if checkUserExist(username) {
|
|
// check certificate valid flag 'V'
|
|
o := runBash(fmt.Sprintf("date +%%Y-%%m-%%d\\ %%H:%%M:%%S && cd %s && echo yes | easyrsa revoke %s && easyrsa gen-crl", *easyrsaDirPath, username))
|
|
if *authByPassword {
|
|
o = runBash(fmt.Sprintf("openvpn-user revoke --db-path %s --user %s", *authDatabase, username))
|
|
//fmt.Println(o)
|
|
}
|
|
crlFix()
|
|
oAdmin.clients = oAdmin.usersList()
|
|
return fmt.Sprintln(o)
|
|
}
|
|
fmt.Printf("User \"%s\" not found", username)
|
|
return fmt.Sprintf("User \"%s\" not found", username)
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) userUnrevoke(username string) string {
|
|
if checkUserExist(username) {
|
|
// check certificate revoked flag 'R'
|
|
usersFromIndexTxt := indexTxtParser(fRead(*indexTxtPath))
|
|
for i := range usersFromIndexTxt {
|
|
if usersFromIndexTxt[i].DistinguishedName == ("/CN=" + username) {
|
|
if usersFromIndexTxt[i].Flag == "R" {
|
|
usersFromIndexTxt[i].Flag = "V"
|
|
usersFromIndexTxt[i].RevocationDate = ""
|
|
o := runBash(fmt.Sprintf("cd %s && cp pki/revoked/certs_by_serial/%s.crt pki/issued/%s.crt", *easyrsaDirPath, usersFromIndexTxt[i].SerialNumber, username))
|
|
//fmt.Println(o)
|
|
o = runBash(fmt.Sprintf("cd %s && cp pki/revoked/certs_by_serial/%s.crt pki/certs_by_serial/%s.pem", *easyrsaDirPath, usersFromIndexTxt[i].SerialNumber, usersFromIndexTxt[i].SerialNumber))
|
|
//fmt.Println(o)
|
|
o = runBash(fmt.Sprintf("cd %s && cp pki/revoked/private_by_serial/%s.key pki/private/%s.key", *easyrsaDirPath, usersFromIndexTxt[i].SerialNumber, username))
|
|
//fmt.Println(o)
|
|
o = runBash(fmt.Sprintf("cd %s && cp pki/revoked/reqs_by_serial/%s.req pki/reqs/%s.req", *easyrsaDirPath, usersFromIndexTxt[i].SerialNumber, username))
|
|
//fmt.Println(o)
|
|
fWrite(*indexTxtPath, renderIndexTxt(usersFromIndexTxt))
|
|
//fmt.Print(renderIndexTxt(usersFromIndexTxt))
|
|
o = runBash(fmt.Sprintf("cd %s && easyrsa gen-crl", *easyrsaDirPath))
|
|
//fmt.Println(o)
|
|
if *authByPassword {
|
|
o = runBash(fmt.Sprintf("openvpn-user restore --db-path %s --user %s", *authDatabase, username))
|
|
//fmt.Println(o)
|
|
}
|
|
crlFix()
|
|
o = ""
|
|
fmt.Println(o)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
fWrite(*indexTxtPath, renderIndexTxt(usersFromIndexTxt))
|
|
fmt.Print(renderIndexTxt(usersFromIndexTxt))
|
|
crlFix()
|
|
oAdmin.clients = oAdmin.usersList()
|
|
return fmt.Sprintf("{\"msg\":\"User %s successfully unrevoked\"}", username)
|
|
}
|
|
return fmt.Sprintf("{\"msg\":\"User \"%s\" not found\"}", username)
|
|
}
|
|
|
|
|
|
func (oAdmin *OpenvpnAdmin) mgmtRead(conn net.Conn) string {
|
|
buf := make([]byte, 32768)
|
|
bufLen, _ := conn.Read(buf)
|
|
s := string(buf[:bufLen])
|
|
return s
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) mgmtConnectedUsersParser(text, serverName string) []clientStatus {
|
|
var u []clientStatus
|
|
isClientList := false
|
|
isRouteTable := false
|
|
scanner := bufio.NewScanner(strings.NewReader(text))
|
|
for scanner.Scan() {
|
|
txt := scanner.Text()
|
|
if regexp.MustCompile(`^Common Name,Real Address,Bytes Received,Bytes Sent,Connected Since$`).MatchString(txt) {
|
|
isClientList = true
|
|
continue
|
|
}
|
|
if regexp.MustCompile(`^ROUTING TABLE$`).MatchString(txt) {
|
|
isClientList = false
|
|
continue
|
|
}
|
|
if regexp.MustCompile(`^Virtual Address,Common Name,Real Address,Last Ref$`).MatchString(txt) {
|
|
isRouteTable = true
|
|
continue
|
|
}
|
|
if regexp.MustCompile(`^GLOBAL STATS$`).MatchString(txt) {
|
|
// isRouteTable = false // ineffectual assignment to isRouteTable (ineffassign)
|
|
break
|
|
}
|
|
if isClientList {
|
|
user := strings.Split(txt, ",")
|
|
|
|
userName := user[0]
|
|
userAddress := user[1]
|
|
userBytesReceived:= user[2]
|
|
userBytesSent:= user[3]
|
|
userConnectedSince := user[4]
|
|
|
|
userStatus := clientStatus{CommonName: userName, RealAddress: userAddress, BytesReceived: userBytesReceived, BytesSent: userBytesSent, ConnectedSince: userConnectedSince, ConnectedTo: serverName}
|
|
u = append(u, userStatus)
|
|
bytesSent, _ := strconv.Atoi(userBytesSent)
|
|
bytesReceive, _ := strconv.Atoi(userBytesReceived)
|
|
ovpnClientConnectionFrom.WithLabelValues(userName, userAddress).Set(float64(parseDateToUnix(ovpnStatusDateLayout, userConnectedSince)))
|
|
ovpnClientBytesSent.WithLabelValues(userName).Set(float64(bytesSent))
|
|
ovpnClientBytesReceived.WithLabelValues(userName).Set(float64(bytesReceive))
|
|
}
|
|
if isRouteTable {
|
|
user := strings.Split(txt, ",")
|
|
for i := range u {
|
|
if u[i].CommonName == user[1] {
|
|
u[i].VirtualAddress = user[0]
|
|
u[i].LastRef = user[3]
|
|
ovpnClientConnectionInfo.WithLabelValues(user[1], user[0]).Set(float64(parseDateToUnix(ovpnStatusDateLayout, user[3])))
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return u
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) mgmtKillUserConnection(username, serverName string) {
|
|
conn, err := net.Dial("tcp", oAdmin.mgmtInterfaces[serverName])
|
|
if err != nil {
|
|
log.Printf("WARNING: openvpn mgmt interface for %s is not reachable by addr %s\n", serverName, oAdmin.mgmtInterfaces[serverName])
|
|
return
|
|
}
|
|
oAdmin.mgmtRead(conn) // read welcome message
|
|
conn.Write([]byte(fmt.Sprintf("kill %s\n", username)))
|
|
fmt.Printf("%v", oAdmin.mgmtRead(conn))
|
|
conn.Close()
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) mgmtGetActiveClients() []clientStatus {
|
|
var activeClients []clientStatus
|
|
|
|
for srv, addr := range oAdmin.mgmtInterfaces {
|
|
conn, err := net.Dial("tcp", addr)
|
|
if err != nil {
|
|
log.Printf("WARNING: openvpn mgmt interface for %s is not reachable by addr %s\n", srv, addr)
|
|
break
|
|
}
|
|
oAdmin.mgmtRead(conn) // read welcome message
|
|
conn.Write([]byte("status\n"))
|
|
activeClients = append(activeClients, oAdmin.mgmtConnectedUsersParser(oAdmin.mgmtRead(conn), srv)...)
|
|
conn.Close()
|
|
}
|
|
return activeClients
|
|
}
|
|
|
|
func isUserConnected(username string, connectedUsers []clientStatus) (bool, string) {
|
|
for _, connectedUser := range connectedUsers {
|
|
if connectedUser.CommonName == username {
|
|
return true, connectedUser.ConnectedTo
|
|
}
|
|
}
|
|
return false, ""
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) downloadCerts() bool {
|
|
if fExist(certsArchivePath) {
|
|
fDelete(certsArchivePath)
|
|
}
|
|
err := fDownload(certsArchivePath, *masterHost + downloadCertsApiUrl + "?token=" + oAdmin.masterSyncToken, oAdmin.masterHostBasicAuth)
|
|
if err != nil {
|
|
log.Println(err)
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) downloadCcd() bool {
|
|
if fExist(ccdArchivePath) {
|
|
fDelete(ccdArchivePath)
|
|
}
|
|
|
|
err := fDownload(ccdArchivePath, *masterHost + downloadCcdApiUrl + "?token=" + oAdmin.masterSyncToken, oAdmin.masterHostBasicAuth)
|
|
if err != nil {
|
|
log.Println(err)
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func archiveCerts() {
|
|
o := runBash(fmt.Sprintf("cd %s && tar -czf %s *", *easyrsaDirPath + "/pki", certsArchivePath ))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
func archiveCcd() {
|
|
o := runBash(fmt.Sprintf("cd %s && tar -czf %s *", *ccdDir, ccdArchivePath ))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
func unArchiveCerts() {
|
|
runBash(fmt.Sprintf("mkdir -p %s", *easyrsaDirPath + "/pki"))
|
|
o := runBash(fmt.Sprintf("cd %s && tar -xzf %s", *easyrsaDirPath + "/pki", certsArchivePath ))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
func unArchiveCcd() {
|
|
runBash(fmt.Sprintf("mkdir -p %s", *ccdDir))
|
|
o := runBash(fmt.Sprintf("cd %s && tar -xzf %s", *ccdDir, ccdArchivePath ))
|
|
fmt.Println(o)
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) syncDataFromMaster() {
|
|
retryCountMax := 3
|
|
certsDownloadFailed := true
|
|
ccdDownloadFailed := true
|
|
certsDownloadRetries := 0
|
|
ccdDownloadRetries := 0
|
|
|
|
for certsDownloadFailed && certsDownloadRetries < retryCountMax {
|
|
certsDownloadRetries += 1
|
|
log.Printf("Downloading certs archive from master. Attempt %d", certsDownloadRetries)
|
|
if oAdmin.downloadCerts() {
|
|
certsDownloadFailed = false
|
|
log.Println("Decompression certs archive from master")
|
|
unArchiveCerts()
|
|
} else {
|
|
log.Printf("WARNING: something goes wrong during downloading certs from master. Attempt %d", certsDownloadRetries)
|
|
}
|
|
}
|
|
|
|
for ccdDownloadFailed && ccdDownloadRetries < retryCountMax {
|
|
ccdDownloadRetries += 1
|
|
log.Printf("Downloading ccd archive from master. Attempt %d", ccdDownloadRetries)
|
|
if oAdmin.downloadCcd() {
|
|
ccdDownloadFailed = false
|
|
log.Println("Decompression ccd archive from master")
|
|
unArchiveCcd()
|
|
} else {
|
|
log.Printf("WARNING: something goes wrong during downloading certs from master. Attempt %d", ccdDownloadRetries)
|
|
}
|
|
}
|
|
|
|
oAdmin.lastSyncTime = time.Now().Format("2006-01-02 15:04:05")
|
|
if !ccdDownloadFailed && !certsDownloadFailed {
|
|
oAdmin.lastSuccessfulSyncTime = time.Now().Format("2006-01-02 15:04:05")
|
|
}
|
|
}
|
|
|
|
func (oAdmin *OpenvpnAdmin) syncWithMaster() {
|
|
for {
|
|
time.Sleep(time.Duration(*masterSyncFrequency) * time.Second)
|
|
oAdmin.syncDataFromMaster()
|
|
}
|
|
}
|
|
|
|
func getOvpnCaCertExpireDate() time.Time {
|
|
caCertPath := *easyrsaDirPath + "/pki/ca.crt"
|
|
caCertExpireDate := runBash(fmt.Sprintf("openssl x509 -in %s -noout -enddate | awk -F \"=\" {'print $2'}", caCertPath))
|
|
|
|
dateLayout := "Jan 2 15:04:05 2006 MST"
|
|
t, err := time.Parse(dateLayout, strings.TrimSpace(caCertExpireDate))
|
|
if err != nil {
|
|
log.Printf("WARNING: can`t parse expire date for CA cert: %v", err)
|
|
return time.Now()
|
|
}
|
|
|
|
return t
|
|
}
|
|
|
|
// https://community.openvpn.net/openvpn/ticket/623
|
|
func crlFix() {
|
|
err1 := os.Chmod(*easyrsaDirPath + "/pki", 0755)
|
|
if err1 != nil {
|
|
log.Println(err1)
|
|
}
|
|
err2 := os.Chmod(*easyrsaDirPath + "/pki/crl.pem", 0644)
|
|
if err2 != nil {
|
|
log.Println(err2)
|
|
}
|
|
}
|