-
Notifications
You must be signed in to change notification settings - Fork 15
/
2fa_u2f.go
342 lines (294 loc) · 9.58 KB
/
2fa_u2f.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
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
332
333
334
335
336
337
338
339
340
341
342
package main
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
"github.com/Cloud-Foundations/keymaster/lib/instrumentedwriter"
"github.com/Cloud-Foundations/keymaster/lib/webapi/v0/proto"
"github.com/Cloud-Foundations/keymaster/proto/eventmon"
"github.com/tstranex/u2f"
)
////////////////////////////
func getRegistrationArray(U2fAuthData map[int64]*u2fAuthData) (regArray []u2f.Registration) {
for _, data := range U2fAuthData {
if data.Enabled {
regArray = append(regArray, *data.Registration)
}
}
return regArray
}
const u2fRegustisterRequestPath = "/u2f/RegisterRequest/"
func (state *RuntimeState) u2fRegisterRequest(w http.ResponseWriter, r *http.Request) {
if state.sendFailureToClientIfLocked(w, r) {
return
}
// /u2f/RegisterRequest/<assumed user>
// pieces[0] == "" pieces[1] = "u2f" pieces[2] == "RegisterRequest"
pieces := strings.Split(r.URL.Path, "/")
var assumedUser string
if len(pieces) >= 4 {
assumedUser = pieces[3]
} else {
http.Error(w, "error", http.StatusBadRequest)
return
}
/*
/*
*/
// TODO(camilo_viecco1): reorder checks so that simple checks are done before checking user creds
authUser, loginLevel, err := state.checkAuth(w, r, state.getRequiredWebUIAuthLevel())
if err != nil {
logger.Debugf(1, "%v", err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authUser)
// Check that they can change other users
if !state.IsAdminUserAndU2F(authUser, loginLevel) && authUser != assumedUser {
http.Error(w, "Unauthorized", http.StatusUnauthorized)
return
}
profile, _, fromCache, err := state.LoadUserProfile(assumedUser)
if err != nil {
logger.Printf("loading profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
if fromCache {
logger.Printf("DB is being cached and requesting registration aborting it")
http.Error(w, "db backend is offline for writes", http.StatusServiceUnavailable)
return
}
c, err := u2f.NewChallenge(u2fAppID, u2fTrustedFacets)
if err != nil {
logger.Printf("u2f.NewChallenge error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
profile.RegistrationChallenge = c
registrations := getRegistrationArray(profile.U2fAuthData)
req := u2f.NewWebRegisterRequest(c, registrations)
logger.Printf("registerRequest: %+v", req)
err = state.SaveUserProfile(assumedUser, profile)
if err != nil {
logger.Printf("Saving profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
json.NewEncoder(w).Encode(req)
}
const u2fRegisterRequesponsePath = "/u2f/RegisterResponse/"
func (state *RuntimeState) u2fRegisterResponse(w http.ResponseWriter, r *http.Request) {
if state.sendFailureToClientIfLocked(w, r) {
return
}
// /u2f/RegisterResponse/<assumed user>
// pieces[0] == "" pieces[1] = "u2f" pieces[2] == "RegisterResponse"
pieces := strings.Split(r.URL.Path, "/")
var assumedUser string
if len(pieces) >= 4 {
assumedUser = pieces[3]
} else {
http.Error(w, "error", http.StatusBadRequest)
return
}
/*
*/
// TODO(camilo_viecco1): reorder checks so that simple checks are done before checking user creds
authUser, loginLevel, err := state.checkAuth(w, r, state.getRequiredWebUIAuthLevel())
if err != nil {
logger.Debugf(1, "%v", err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authUser)
// Check that they can change other users
if !state.IsAdminUserAndU2F(authUser, loginLevel) && authUser != assumedUser {
http.Error(w, "Unauthorized", http.StatusUnauthorized)
return
}
var regResp u2f.RegisterResponse
if err := json.NewDecoder(r.Body).Decode(®Resp); err != nil {
http.Error(w, "invalid response: "+err.Error(), http.StatusBadRequest)
return
}
profile, _, fromCache, err := state.LoadUserProfile(assumedUser)
if err != nil {
logger.Printf("loading profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
if fromCache {
logger.Printf("DB is being cached and requesting registration aborting it")
http.Error(w, "db backend is offline for writes", http.StatusServiceUnavailable)
return
}
if profile.RegistrationChallenge == nil {
http.Error(w, "challenge not found", http.StatusBadRequest)
return
}
// TODO: use yubikey or get the feitan cert :(
u2fConfig := u2f.Config{SkipAttestationVerify: true}
reg, err := u2f.Register(regResp, *profile.RegistrationChallenge, &u2fConfig)
if err != nil {
logger.Printf("u2f.Register error: %v", err)
http.Error(w, "error verifying response", http.StatusInternalServerError)
return
}
newReg := u2fAuthData{Counter: 0,
Registration: reg,
Enabled: true,
CreatedAt: time.Now(),
CreatorAddr: r.RemoteAddr,
}
if authUser != assumedUser {
newReg.Name = fmt.Sprintf("Registered by %s", authUser)
}
newIndex := newReg.CreatedAt.Unix()
profile.U2fAuthData[newIndex] = &newReg
logger.Printf("Registration success: %+v", reg)
profile.RegistrationChallenge = nil
profile.UserHasRegistered2ndFactor = true
err = state.SaveUserProfile(assumedUser, profile)
if err != nil {
logger.Printf("Saving profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
w.Write([]byte("success"))
}
const u2fSignRequestPath = "/u2f/SignRequest"
func (state *RuntimeState) u2fSignRequest(w http.ResponseWriter, r *http.Request) {
if state.sendFailureToClientIfLocked(w, r) {
return
}
/*
*/
// TODO(camilo_viecco1): reorder checks so that simple checks are done before checking user creds
authUser, _, err := state.checkAuth(w, r, AuthTypeAny)
if err != nil {
logger.Debugf(1, "%v", err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authUser)
//////////
profile, ok, _, err := state.LoadUserProfile(authUser)
if err != nil {
logger.Printf("loading profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
/////////
if !ok {
http.Error(w, "No regstered data", http.StatusBadRequest)
return
}
registrations := getRegistrationArray(profile.U2fAuthData)
if len(registrations) < 1 {
http.Error(w, "registration missing", http.StatusBadRequest)
return
}
c, err := u2f.NewChallenge(u2fAppID, u2fTrustedFacets)
if err != nil {
logger.Printf("u2f.NewChallenge error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
//save cached copy
var localAuth localUserData
localAuth.U2fAuthChallenge = c
localAuth.ExpiresAt = time.Now().Add(maxAgeU2FVerifySeconds * time.Second)
state.Mutex.Lock()
state.localAuthData[authUser] = localAuth
state.Mutex.Unlock()
req := c.SignRequest(registrations)
logger.Debugf(3, "Sign request: %+v", req)
if err := json.NewEncoder(w).Encode(req); err != nil {
logger.Printf("json encofing error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
}
const u2fSignResponsePath = "/u2f/SignResponse"
func (state *RuntimeState) u2fSignResponse(w http.ResponseWriter, r *http.Request) {
// User must be logged in
if state.sendFailureToClientIfLocked(w, r) {
return
}
/*
*/
// TODO(camilo_viecco1): reorder checks so that simple checks are done before checking user creds
authUser, currentAuthLevel, err := state.checkAuth(w, r, AuthTypeAny)
if err != nil {
logger.Debugf(1, "%v", err)
return
}
w.(*instrumentedwriter.LoggingWriter).SetUsername(authUser)
//now the actual work
var signResp u2f.SignResponse
if err := json.NewDecoder(r.Body).Decode(&signResp); err != nil {
http.Error(w, "invalid response: "+err.Error(), http.StatusBadRequest)
return
}
logger.Debugf(1, "signResponse: %+v", signResp)
profile, ok, _, err := state.LoadUserProfile(authUser)
if err != nil {
logger.Printf("loading profile error: %v", err)
http.Error(w, "error", http.StatusInternalServerError)
return
}
/////////
if !ok {
http.Error(w, "No regstered data", http.StatusBadRequest)
return
}
registrations := getRegistrationArray(profile.U2fAuthData)
if len(registrations) < 1 {
http.Error(w, "registration missing", http.StatusBadRequest)
return
}
if registrations == nil {
http.Error(w, "registration missing", http.StatusBadRequest)
return
}
state.Mutex.Lock()
localAuth, ok := state.localAuthData[authUser]
state.Mutex.Unlock()
if !ok {
http.Error(w, "challenge missing", http.StatusBadRequest)
return
}
//var err error
for i, u2fReg := range profile.U2fAuthData {
//newCounter, authErr := u2fReg.Registration.Authenticate(signResp, *profile.U2fAuthChallenge, u2fReg.Counter)
newCounter, authErr := u2fReg.Registration.Authenticate(signResp, *localAuth.U2fAuthChallenge, u2fReg.Counter)
if authErr == nil {
metricLogAuthOperation(getClientType(r), proto.AuthTypeU2F, true)
logger.Debugf(0, "newCounter: %d", newCounter)
//counter = newCounter
u2fReg.Counter = newCounter
//profile.U2fAuthData[i].Counter = newCounter
u2fReg.Counter = newCounter
profile.U2fAuthData[i] = u2fReg
//profile.U2fAuthChallenge = nil
delete(state.localAuthData, authUser)
eventNotifier.PublishAuthEvent(eventmon.AuthTypeU2F, authUser)
_, isXHR := r.Header["X-Requested-With"]
if isXHR {
eventNotifier.PublishWebLoginEvent(authUser)
}
_, err = state.updateAuthCookieAuthlevel(w, r, currentAuthLevel|AuthTypeU2F)
if err != nil {
logger.Printf("Auth Cookie NOT found ? %s", err)
state.writeFailureResponse(w, r, http.StatusInternalServerError, "Failure updating vip token")
return
}
// TODO: update local cookie state
w.Write([]byte("success"))
return
}
}
metricLogAuthOperation(getClientType(r), proto.AuthTypeU2F, false)
logger.Printf("VerifySignResponse error: %v", err)
http.Error(w, "error verifying response", http.StatusInternalServerError)
}