/
validator.go
75 lines (63 loc) · 2.44 KB
/
validator.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
/*
* Copyright (C) 2018 The "MysteriumNetwork/node" Authors.
*
* 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 session
import (
"sync"
"github.com/mysteriumnetwork/node/identity"
"github.com/mysteriumnetwork/node/session"
)
// SignaturePrefix is used to prefix with each session string before calculating signature or extracting identity
const SignaturePrefix = "MystVpnSessionId:"
// Validator structure that keeps attributes needed Validator operations
type Validator struct {
clientMap *clientMap
identityExtractor identity.Extractor
}
// NewValidator return Validator instance
func NewValidator(sessionMap SessionMap, extractor identity.Extractor) *Validator {
return &Validator{
clientMap: &clientMap{
sessions: sessionMap,
sessionClientIDs: make(map[session.ID]int),
sessionMapLock: sync.Mutex{},
},
identityExtractor: extractor,
}
}
// Validate provides glue code for openvpn management interface to validate incoming client login request,
// it expects session id as username, and session signature signed by client as password
func (v *Validator) Validate(clientID int, sessionString, signatureString string) (bool, error) {
sessionID := session.ID(sessionString)
currentSession, found, err := v.clientMap.FindClientSession(clientID, sessionID)
if err != nil {
return false, err
}
if !found {
v.clientMap.UpdateClientSession(clientID, sessionID)
}
signature := identity.SignatureBase64(signatureString)
extractedIdentity, err := v.identityExtractor.Extract([]byte(SignaturePrefix+sessionString), signature)
if err != nil {
return false, err
}
return currentSession.ConsumerID == extractedIdentity, nil
}
// Cleanup removes session from underlying session managers
func (v *Validator) Cleanup(sessionString string) error {
sessionID := session.ID(sessionString)
return v.clientMap.RemoveSession(sessionID)
}