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// Copyright (C) 2018 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 bonafide
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"strings"
)
type SipAuthentication struct {
bonafide *Bonafide
}
func (a *SipAuthentication) GetPemCertificate() ([]byte, error) {
cred := a.bonafide.credentials
if cred == nil {
return nil, fmt.Errorf("Need bonafide credentials for sip auth")
}
credJson, err := formatCredentials(cred.User, cred.Password)
if err != nil {
return nil, fmt.Errorf("Cannot encode credentials: %s", err)
}
token, err := a.getToken(credJson)
if err != nil {
return nil, fmt.Errorf("Error while getting token: %s", err)
}
cert, err := a.getProtectedCert(string(token))
if err != nil {
return nil, fmt.Errorf("Error while getting cert: %s", err)
}
return cert, nil
}
func (a *SipAuthentication) getProtectedCert(token string) ([]byte, error) {
req, err := http.NewRequest("POST", certAPI, strings.NewReader(""))
req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := a.bonafide.client.Do(req)
if err != nil {
return nil, fmt.Errorf("Error while getting token: %s", err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("Cannot get cert: Error %d", resp.StatusCode)
}
return ioutil.ReadAll(resp.Body)
}
func (a *SipAuthentication) getToken(credJson string) ([]byte, error) {
/* TODO
[ ] get token from disk?
[ ] check if expired? set a goroutine to refresh it periodically?
*/
resp, err := http.Post(authAPI, "text/json", strings.NewReader(credJson))
if err != nil {
log.Fatal("Error on auth request: ", err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("Cannot get token: Error %d", resp.StatusCode)
}
return ioutil.ReadAll(resp.Body)
}
func formatCredentials(user, pass string) (string, error) {
c := Credentials{User: user, Password: pass}
credJson, err := json.Marshal(c)
if err != nil {
return "", err
}
return string(credJson), nil
}
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