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
|
// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package security
import (
"bytes"
"encoding/base64"
"html/template"
"image/png"
"net/http"
"strings"
"code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/services/forms"
"github.com/pquerna/otp"
"github.com/pquerna/otp/totp"
)
// RegenerateScratchTwoFactor regenerates the user's 2FA scratch code.
func RegenerateScratchTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := auth.GetTwoFactorByUID(ctx.Doer.ID)
if err != nil {
if auth.IsErrTwoFactorNotEnrolled(err) {
ctx.Flash.Error(ctx.Tr("settings.twofa_not_enrolled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
return
}
token, err := t.GenerateScratchToken()
if err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to GenerateScratchToken", err)
return
}
if err = auth.UpdateTwoFactor(t); err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to UpdateTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_scratch_token_regenerated", token))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
// DisableTwoFactor deletes the user's 2FA settings.
func DisableTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := auth.GetTwoFactorByUID(ctx.Doer.ID)
if err != nil {
if auth.IsErrTwoFactorNotEnrolled(err) {
ctx.Flash.Error(ctx.Tr("settings.twofa_not_enrolled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err)
return
}
if err = auth.DeleteTwoFactorByID(t.ID, ctx.Doer.ID); err != nil {
if auth.IsErrTwoFactorNotEnrolled(err) {
// There is a potential DB race here - we must have been disabled by another request in the intervening period
ctx.Flash.Success(ctx.Tr("settings.twofa_disabled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
ctx.ServerError("SettingsTwoFactor: Failed to DeleteTwoFactorByID", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_disabled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
func twofaGenerateSecretAndQr(ctx *context.Context) bool {
var otpKey *otp.Key
var err error
uri := ctx.Session.Get("twofaUri")
if uri != nil {
otpKey, err = otp.NewKeyFromURL(uri.(string))
if err != nil {
ctx.ServerError("SettingsTwoFactor: Failed NewKeyFromURL: ", err)
return false
}
}
// Filter unsafe character ':' in issuer
issuer := strings.ReplaceAll(setting.AppName+" ("+setting.Domain+")", ":", "")
if otpKey == nil {
otpKey, err = totp.Generate(totp.GenerateOpts{
SecretSize: 40,
Issuer: issuer,
AccountName: ctx.Doer.Name,
})
if err != nil {
ctx.ServerError("SettingsTwoFactor: totpGenerate Failed", err)
return false
}
}
ctx.Data["TwofaSecret"] = otpKey.Secret()
img, err := otpKey.Image(320, 240)
if err != nil {
ctx.ServerError("SettingsTwoFactor: otpKey image generation failed", err)
return false
}
var imgBytes bytes.Buffer
if err = png.Encode(&imgBytes, img); err != nil {
ctx.ServerError("SettingsTwoFactor: otpKey png encoding failed", err)
return false
}
ctx.Data["QrUri"] = template.URL("data:image/png;base64," + base64.StdEncoding.EncodeToString(imgBytes.Bytes()))
if err := ctx.Session.Set("twofaSecret", otpKey.Secret()); err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to set session for twofaSecret", err)
return false
}
if err := ctx.Session.Set("twofaUri", otpKey.String()); err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to set session for twofaUri", err)
return false
}
// Here we're just going to try to release the session early
if err := ctx.Session.Release(); err != nil {
// we'll tolerate errors here as they *should* get saved elsewhere
log.Error("Unable to save changes to the session: %v", err)
}
return true
}
// EnrollTwoFactor shows the page where the user can enroll into 2FA.
func EnrollTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := auth.GetTwoFactorByUID(ctx.Doer.ID)
if t != nil {
// already enrolled - we should redirect back!
log.Warn("Trying to re-enroll %-v in twofa when already enrolled", ctx.Doer)
ctx.Flash.Error(ctx.Tr("settings.twofa_is_enrolled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
return
}
if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("SettingsTwoFactor: GetTwoFactorByUID", err)
return
}
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll)
}
// EnrollTwoFactorPost handles enrolling the user into 2FA.
func EnrollTwoFactorPost(ctx *context.Context) {
form := web.GetForm(ctx).(*forms.TwoFactorAuthForm)
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := auth.GetTwoFactorByUID(ctx.Doer.ID)
if t != nil {
// already enrolled
ctx.Flash.Error(ctx.Tr("settings.twofa_is_enrolled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
return
}
if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("SettingsTwoFactor: Failed to check if already enrolled with GetTwoFactorByUID", err)
return
}
if ctx.HasError() {
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll)
return
}
secretRaw := ctx.Session.Get("twofaSecret")
if secretRaw == nil {
ctx.Flash.Error(ctx.Tr("settings.twofa_failed_get_secret"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security/two_factor/enroll")
return
}
secret := secretRaw.(string)
if !totp.Validate(form.Passcode, secret) {
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.Flash.Error(ctx.Tr("settings.passcode_invalid"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security/two_factor/enroll")
return
}
t = &auth.TwoFactor{
UID: ctx.Doer.ID,
}
err = t.SetSecret(secret)
if err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to set secret", err)
return
}
token, err := t.GenerateScratchToken()
if err != nil {
ctx.ServerError("SettingsTwoFactor: Failed to generate scratch token", err)
return
}
// Now we have to delete the secrets - because if we fail to insert then it's highly likely that they have already been used
// If we can detect the unique constraint failure below we can move this to after the NewTwoFactor
if err := ctx.Session.Delete("twofaSecret"); err != nil {
// tolerate this failure - it's more important to continue
log.Error("Unable to delete twofaSecret from the session: Error: %v", err)
}
if err := ctx.Session.Delete("twofaUri"); err != nil {
// tolerate this failure - it's more important to continue
log.Error("Unable to delete twofaUri from the session: Error: %v", err)
}
if err := ctx.Session.Release(); err != nil {
// tolerate this failure - it's more important to continue
log.Error("Unable to save changes to the session: %v", err)
}
if err = auth.NewTwoFactor(t); err != nil {
// FIXME: We need to handle a unique constraint fail here it's entirely possible that another request has beaten us.
// If there is a unique constraint fail we should just tolerate the error
ctx.ServerError("SettingsTwoFactor: Failed to save two factor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_enrolled", token))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
|
