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// Copyright (C) 2019 LEAP
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package sip2
import (
"log"
"os"
"0xacab.org/leap/vpnweb/pkg/config"
)
const (
sipUserVar string = "VPNWEB_SIP_USER"
sipPassVar string = "VPNWEB_SIP_PASS"
sipPortVar string = "VPNWEB_SIP_PORT"
sipHostVar string = "VPNWEB_SIP_HOST"
sipLibrLocVar string = "VPNWEB_SIP_LIBR_LOCATION"
sipTerminatorVar string = "VPNWEB_SIP_TERMINATOR"
sipDefaultTerminator string = "\r\n"
)
func getConfigFromEnv(envVar, defaultVar string) string {
val, exists := os.LookupEnv(envVar)
if !exists {
if defaultVar == "" {
log.Fatal("Need to set required env var: ", envVar)
} else {
return defaultVar
}
}
return val
}
func setupTerminatorFromEnv() {
config.FallbackToEnv(&telnetTerminator, sipTerminatorVar, sipDefaultTerminator)
if telnetTerminator == "\\r" {
telnetTerminator = "\r"
} else if telnetTerminator == "\\r\\n" {
telnetTerminator = "\r\n"
}
}
func initializeSipConnection(skipConnect bool, passwordPolicy string) (sipClient, error) {
log.Println("Initializing SIP2 authenticator")
user := getConfigFromEnv(sipUserVar, "")
pass := getConfigFromEnv(sipPassVar, "")
host := getConfigFromEnv(sipHostVar, "localhost")
port := getConfigFromEnv(sipPortVar, "6001")
loc := getConfigFromEnv(sipLibrLocVar, "")
setupTerminatorFromEnv()
sip := newClient(host, port, loc, passwordPolicy)
if skipConnect {
// for testing purposes
return sip, nil
}
sip.setCredentials(user, pass)
_, err := sip.doConnectAndReact()
if err != nil {
return sip, err
}
return sip, nil
}
func GetAuthenticator(opts *config.Opts, skipConnect bool) *sipClient {
sip, err := initializeSipConnection(skipConnect, opts.PasswordPolicy)
if err != nil {
log.Fatal("Cannot initialize sip:", err)
}
return &sip
}
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