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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
|
/*
* Copyright (c) 2014, Yawning Angel <yawning at torproject dot org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
// Package transports provides a interface to query supported pluggable
// transports.
package transports
import (
"errors"
"github.com/OperatorFoundation/shapeshifter-transports/transports/Dust"
"github.com/OperatorFoundation/shapeshifter-transports/transports/Optimizer"
replicant "github.com/OperatorFoundation/shapeshifter-transports/transports/Replicant"
"github.com/OperatorFoundation/shapeshifter-transports/transports/meeklite"
"github.com/OperatorFoundation/shapeshifter-transports/transports/obfs4"
"github.com/OperatorFoundation/shapeshifter-transports/transports/shadow"
"github.com/mufti1/interconv/package"
gourl "net/url"
"strconv"
)
// Transports returns the list of registered transport protocols.
func Transports() []string {
return []string{"obfs2", "shadow", "obfs4", "Optimizer"}
}
func ParseArgsObfs4(args map[string]interface{}, target string) (*obfs4.Transport, error) {
var cert string
var iatMode int
untypedCert, ok := args["cert"]
if !ok {
return nil, errors.New("obfs4 transport missing cert argument")
}
switch untypedCert.(type) {
case string:
var icerr error
cert, icerr = interconv.ParseString(untypedCert)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("Unsupported type for obfs4 cert option")
}
untypedIatMode, ok2 := args["iatMode"]
if !ok2 {
return nil, errors.New("obfs4 transport missing iatMode argument")
}
switch untypedCert.(type) {
case string:
iatModeStr, icerr := interconv.ParseString(untypedIatMode)
if icerr != nil {
return nil, icerr
}
iatModeInt, scerr := strconv.Atoi(iatModeStr)
if scerr != nil {
return nil, errors.New("obfs4 transport bad iatMode value")
}
switch iatModeInt {
case 0:
iatMode = iatModeInt
case 1:
iatMode = iatModeInt
default:
return nil, errors.New("Unsupported value for obfs4 iatMode option")
}
case float64:
iatModeFloat, icerr := interconv.ParseFloat64(untypedIatMode)
if icerr != nil {
return nil, icerr
}
iatModeInt := int(iatModeFloat)
switch iatModeInt {
case 0:
iatMode = iatModeInt
case 1:
iatMode = iatModeInt
default:
return nil, errors.New("Unsupported value for obfs4 iatMode option")
}
case int:
iatModeInt, icerr := interconv.ParseInt(untypedIatMode)
if icerr != nil {
return nil, icerr
}
switch iatModeInt {
case 0:
iatMode = iatModeInt
case 1:
iatMode = iatModeInt
default:
return nil, errors.New("Unsupported value for obfs4 iatMode option")
}
case bool:
iatModeBool, icerr := interconv.ParseBoolean(untypedCert)
if icerr != nil {
return nil, icerr
}
switch iatModeBool {
case true:
iatMode = 1
case false:
iatMode = 0
}
default:
return nil, errors.New("Unsupported type for obfs4 iatMode option")
}
transport := obfs4.Transport{
CertString: cert,
IatMode: iatMode,
Address: target,
}
return &transport, nil
}
func ParseArgsShadow(args map[string]interface{}, target string) (*shadow.Transport, error) {
var password string
var cipherName string
untypedPassword, ok := args["password"]
if !ok {
return nil, errors.New("shadow transport missing password argument")
}
switch untypedPassword.(type) {
case string:
var icerr error
password, icerr = interconv.ParseString(untypedPassword)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for shadow password option")
}
untypedCipherName, ok2 := args["cipherName"]
if !ok2 {
return nil, errors.New("shadow transport missing cipherName argument")
}
switch untypedCipherName.(type) {
case string:
var icerr error
cipherName, icerr = interconv.ParseString(untypedCipherName)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for shadow cipherName option")
}
transport := shadow.Transport{
Password: password,
CipherName: cipherName,
Address: target,
}
return &transport, nil
}
func ParseArgsDust(args map[string]interface{}, target string) (*Dust.Transport, error) {
var serverPublic string
untypedServerPublic, ok := args["serverPublic"]
if !ok {
return nil, errors.New("dust transport missing serverpublic argument")
}
switch untypedServerPublic.(type) {
case string:
var icerr error
serverPublic, icerr = interconv.ParseString(untypedServerPublic)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for dust serverpublic option")
}
transport := Dust.Transport{
ServerPublic: serverPublic,
Address: target,
}
return &transport, nil
}
func ParseArgsReplicant(args map[string]interface{}, target string) (*replicant.Transport, error) {
var conf replicant.Config
untypedConfig, ok := args["config"]
if !ok {
return nil, errors.New("replicant transport missing config argument")
}
switch untypedConfig.(type) {
case string:
var icerr error
conf, icerr = interconv.ParseString(untypedConfig)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for replicant config option")
}
transport := replicant.Transport{
replicant.Config{} config,
Address: target,
}
return &transport, nil
}
func ParseArgsMeeklite(args map[string]interface{}, target string) (*meeklite.Transport, error) {
var url gourl.URL
var front string
untypedUrl, ok := args["url"]
if !ok {
return nil, errors.New("meeklite transport missing url argument")
}
switch untypedUrl.(type) {
case gourl.URL:
var icerr error
url, icerr = interconv.ParseString(untypedUrl)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for meeklite url option")
}
untypedFront, ok2 := args["front"]
if !ok2 {
return nil, errors.New("meeklite transport missing front argument")
}
switch untypedFront.(type) {
case string:
var icerr error
front, icerr = interconv.ParseString(untypedFront)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for meeklite front option")
}
transport := meeklite.Transport{
Url: url,
Front: front,
Address: target,
}
return &transport, nil
}
func ParseArgsOptimizer(args map[string]interface{}, target string) (*Optimizer.OptimizerTransport, error) {
var transports []Optimizer.Transport
var strategy Optimizer.Strategy
untypedTransports, ok := args["transports"]
if !ok {
return nil, errors.New("optimizer transport missing transports argument")
}
switch untypedTransports.(type) {
case []Optimizer.Transport:
var icerr error
transports, icerr = interconv.ParseString(untypedTransports)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for Optimizer transports option")
}
untypedStrategy, ok2 := args["strategy"]
if !ok2 {
return nil, errors.New("optimizer transport missing strategy argument")
}
switch untypedStrategy.(type) {
case Optimizer.Strategy:
var icerr error
strategy, icerr = interconv.ParseString(untypedStrategy)
if icerr != nil {
return nil, icerr
}
default:
return nil, errors.New("unsupported type for optimizer strategy option")
}
transport := Optimizer.OptimizerTransport{
Transports: transports,
Strategy: strategy,
}
return &transport, nil
}
|