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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// 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 (
"crypto/tls"
"crypto/x509"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"time"
"0xacab.org/leap/bitmask-vpn/pkg/config"
)
const (
certAPI = config.APIURL + "1/cert"
certAPI3 = config.APIURL + "3/cert"
authAPI = config.APIURL + "3/auth"
secondsPerHour = 60 * 60
retryFetchJSONSeconds = 15
)
// Bonafide exposes all the methods needed to communicate with the LEAP server.
type Bonafide struct {
client httpClient
eip *eipService
tzOffsetHours int
auth Authentication
credentials *Credentials
}
// A Gateway is each one of the remotes we can pass to OpenVPN. It contains a description of all the fields that the eip-service advertises.
type Gateway struct {
Host string
IPAddress string
Location string
Ports []string
Protocols []string
Options map[string]string
}
type openvpnConfig map[string]interface{}
type httpClient interface {
Post(url, contentType string, body io.Reader) (resp *http.Response, err error)
Do(req *http.Request) (*http.Response, error)
}
// The Authentication interface allows to get a Certificate in Pem format.
// We implement Anonymous Authentication (Riseup et al), and Sip (Libraries).
type Authentication interface {
GetPemCertificate() ([]byte, error)
}
type geoLocation struct {
IPAddress string `json:"ip"`
Country string `json:"cc"`
City string `json:"city"`
Latitude float64 `json:"lat"`
Longitude float64 `json:"lon"`
SortedGateways []string `json:"gateways"`
}
// New Bonafide: Initializes a Bonafide object. By default, no Credentials are passed.
func New() *Bonafide {
certs := x509.NewCertPool()
certs.AppendCertsFromPEM(config.CaCert)
client := &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: certs,
},
},
}
_, tzOffsetSeconds := time.Now().Zone()
tzOffsetHours := tzOffsetSeconds / secondsPerHour
b := &Bonafide{
client: client,
eip: nil,
tzOffsetHours: tzOffsetHours,
}
auth := AnonymousAuthentication{b}
b.auth = &auth
return b
}
func (b *Bonafide) SetCredentials(username, password string) {
b.credentials = &Credentials{username, password}
}
func (b *Bonafide) GetPemCertificate() ([]byte, error) {
cert, err := b.auth.GetPemCertificate()
return cert, err
}
func (b *Bonafide) GetGateways(transport string) ([]Gateway, error) {
if b.eip == nil {
err := b.fetchEipJSON()
if err != nil {
return nil, err
}
}
return b.eip.getGateways(transport), nil
}
func (b *Bonafide) SetDefaultGateway(name string) {
b.eip.setDefaultGateway(name)
b.sortGateways()
}
func (b *Bonafide) GetOpenvpnArgs() ([]string, error) {
if b.eip == nil {
err := b.fetchEipJSON()
if err != nil {
return nil, err
}
}
return b.eip.getOpenvpnArgs(), nil
}
func (b *Bonafide) fetchGeolocation() ([]string, error) {
resp, err := b.client.Post(config.GeolocationAPI, "", nil)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("get geolocation failed with status: %s", resp.Status)
}
geo := &geoLocation{}
dataJSON, err := ioutil.ReadAll(resp.Body)
err = json.Unmarshal(dataJSON, &geo)
if err != nil {
_ = fmt.Errorf("get vpn cert has failed with status: %s", resp.Status)
return nil, err
}
return geo.SortedGateways, nil
}
func (b *Bonafide) sortGateways() {
geolocatedGateways, _ := b.fetchGeolocation()
if len(geolocatedGateways) > 0 {
b.eip.sortGatewaysByGeolocation(geolocatedGateways)
} else {
log.Printf("Falling back to timezone heuristic for gateway selection")
b.eip.sortGatewaysByTimezone(b.tzOffsetHours)
}
}
|
