-
Notifications
You must be signed in to change notification settings - Fork 1.6k
/
webauthn.go
293 lines (244 loc) · 8.07 KB
/
webauthn.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
package sessions
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"sync"
"github.com/duo-labs/webauthn/protocol"
"github.com/duo-labs/webauthn/webauthn"
"github.com/pkg/errors"
sqlxTypes "github.com/smartcontractkit/sqlx/types"
)
// WebAuthn holds the credentials for API user.
type WebAuthn struct {
Email string
PublicKeyData sqlxTypes.JSONText
}
// WebAuthnUser implements the required duo-labs/webauthn/ 'User' interface
// kept separate from our internal 'User' struct
type WebAuthnUser struct {
Email string
WACredentials []webauthn.Credential
}
type WebAuthnConfiguration struct {
RPID string
RPOrigin string
}
func (store *WebAuthnSessionStore) BeginWebAuthnRegistration(user User, uwas []WebAuthn, config WebAuthnConfiguration) (*protocol.CredentialCreation, error) {
webAuthn, err := webauthn.New(&webauthn.Config{
RPDisplayName: "Chainlink Operator", // Display Name
RPID: config.RPID, // Generally the domain name
RPOrigin: config.RPOrigin, // The origin URL for WebAuthn requests
})
if err != nil {
return nil, err
}
waUser, err := duoWebAuthUserFromUser(user, uwas)
if err != nil {
return nil, err
}
registerOptions := func(credCreationOpts *protocol.PublicKeyCredentialCreationOptions) {
credCreationOpts.CredentialExcludeList = waUser.CredentialExcludeList()
}
// generate PublicKeyCredentialCreationOptions, session data
options, sessionData, err := webAuthn.BeginRegistration(
waUser,
registerOptions,
)
if err != nil {
return nil, err
}
userRegistrationIndexKey := fmt.Sprintf("%s-registration", user.Email)
err = store.SaveWebauthnSession(userRegistrationIndexKey, sessionData)
if err != nil {
return nil, err
}
return options, nil
}
func (store *WebAuthnSessionStore) FinishWebAuthnRegistration(user User, uwas []WebAuthn, response *http.Request, config WebAuthnConfiguration) (*webauthn.Credential, error) {
webAuthn, err := webauthn.New(&webauthn.Config{
RPDisplayName: "Chainlink Operator", // Display Name
RPID: config.RPID, // Generally the domain name
RPOrigin: config.RPOrigin, // The origin URL for WebAuthn requests
})
if err != nil {
return nil, err
}
userRegistrationIndexKey := fmt.Sprintf("%s-registration", user.Email)
sessionData, err := store.GetWebauthnSession(userRegistrationIndexKey)
if err != nil {
return nil, err
}
waUser, err := duoWebAuthUserFromUser(user, uwas)
if err != nil {
return nil, err
}
credential, err := webAuthn.FinishRegistration(waUser, sessionData, response)
if err != nil {
return nil, errors.Wrap(err, "failed to FinishRegistration")
}
return credential, nil
}
func BeginWebAuthnLogin(user User, uwas []WebAuthn, sr SessionRequest) (*protocol.CredentialAssertion, error) {
webAuthn, err := webauthn.New(&webauthn.Config{
RPDisplayName: "Chainlink Operator", // Display Name
RPID: sr.WebAuthnConfig.RPID, // Generally the domain name
RPOrigin: sr.WebAuthnConfig.RPOrigin, // The origin URL for WebAuthn requests
})
if err != nil {
return nil, err
}
waUser, err := duoWebAuthUserFromUser(user, uwas)
if err != nil {
return nil, err
}
options, sessionData, err := webAuthn.BeginLogin(waUser)
if err != nil {
return nil, err
}
userLoginIndexKey := fmt.Sprintf("%s-authentication", user.Email)
err = sr.SessionStore.SaveWebauthnSession(userLoginIndexKey, sessionData)
if err != nil {
return nil, err
}
return options, nil
}
func FinishWebAuthnLogin(user User, uwas []WebAuthn, sr SessionRequest) error {
webAuthn, err := webauthn.New(&webauthn.Config{
RPDisplayName: "Chainlink Operator", // Display Name
RPID: sr.WebAuthnConfig.RPID, // Generally the domain name
RPOrigin: sr.WebAuthnConfig.RPOrigin, // The origin URL for WebAuthn requests
})
if err != nil {
return errors.Wrapf(err, "failed to create webAuthn structure with RPID: %s and RPOrigin: %s", sr.WebAuthnConfig.RPID, sr.WebAuthnConfig.RPOrigin)
}
credential, err := protocol.ParseCredentialRequestResponseBody(strings.NewReader(sr.WebAuthnData))
if err != nil {
return err
}
userLoginIndexKey := fmt.Sprintf("%s-authentication", user.Email)
sessionData, err := sr.SessionStore.GetWebauthnSession(userLoginIndexKey)
if err != nil {
return err
}
waUser, err := duoWebAuthUserFromUser(user, uwas)
if err != nil {
return err
}
_, err = webAuthn.ValidateLogin(waUser, sessionData, credential)
return err
}
// WebAuthnID returns the user's ID
func (u WebAuthnUser) WebAuthnID() []byte {
return []byte(u.Email)
}
// WebAuthnName returns the user's email
func (u WebAuthnUser) WebAuthnName() string {
return u.Email
}
// WebAuthnDisplayName returns the user's display name.
// In this case we just return the email
func (u WebAuthnUser) WebAuthnDisplayName() string {
return u.Email
}
// WebAuthnIcon should be the logo in some form. How it should
// be is currently unclear to me.
func (u WebAuthnUser) WebAuthnIcon() string {
return ""
}
// WebAuthnCredentials returns credentials owned by the user
func (u WebAuthnUser) WebAuthnCredentials() []webauthn.Credential {
return u.WACredentials
}
// CredentialExcludeList returns a CredentialDescriptor array filled
// with all the user's credentials to prevent them from re-registering
// keys
func (u WebAuthnUser) CredentialExcludeList() []protocol.CredentialDescriptor {
credentialExcludeList := []protocol.CredentialDescriptor{}
for _, cred := range u.WACredentials {
descriptor := protocol.CredentialDescriptor{
Type: protocol.PublicKeyCredentialType,
CredentialID: cred.ID,
}
credentialExcludeList = append(credentialExcludeList, descriptor)
}
return credentialExcludeList
}
func (u *WebAuthnUser) LoadWebAuthnCredentials(uwas []WebAuthn) error {
for _, v := range uwas {
var credential webauthn.Credential
err := v.PublicKeyData.Unmarshal(&credential)
if err != nil {
return fmt.Errorf("error unmarshalling provided PublicKeyData: %s", err)
}
u.WACredentials = append(u.WACredentials, credential)
}
return nil
}
func duoWebAuthUserFromUser(user User, uwas []WebAuthn) (WebAuthnUser, error) {
waUser := WebAuthnUser{
Email: user.Email,
}
err := waUser.LoadWebAuthnCredentials(uwas)
return waUser, err
}
// WebAuthnSessionStore is a wrapper around an in memory key value store which provides some helper
// methods related to webauthn operations.
type WebAuthnSessionStore struct {
inProgressRegistrations map[string]string
mu sync.Mutex
}
// NewWebAuthnSessionStore returns a new session store.
func NewWebAuthnSessionStore() *WebAuthnSessionStore {
return &WebAuthnSessionStore{
inProgressRegistrations: map[string]string{},
}
}
// SaveWebauthnSession marshals and saves the webauthn data to the provided
// key given the request and responsewriter
func (store *WebAuthnSessionStore) SaveWebauthnSession(key string, data *webauthn.SessionData) error {
marshaledData, err := json.Marshal(data)
if err != nil {
return err
}
store.put(key, string(marshaledData))
return nil
}
func (store *WebAuthnSessionStore) put(key, val string) {
store.mu.Lock()
defer store.mu.Unlock()
store.inProgressRegistrations[key] = val
}
// take returns the val for key, as well as removing it.
func (store *WebAuthnSessionStore) take(key string) (val string, ok bool) {
store.mu.Lock()
defer store.mu.Unlock()
val, ok = store.inProgressRegistrations[key]
if ok {
delete(store.inProgressRegistrations, key)
}
return
}
// GetWebauthnSession unmarshals and returns the webauthn session information
// from the session cookie, which is removed.
func (store *WebAuthnSessionStore) GetWebauthnSession(key string) (data webauthn.SessionData, err error) {
assertion, ok := store.take(key)
if !ok {
err = errors.New("assertion not in challenge store")
return
}
err = json.Unmarshal([]byte(assertion), &data)
return
}
func AddCredentialToUser(o ORM, email string, credential *webauthn.Credential) error {
credj, err := json.Marshal(credential)
if err != nil {
return err
}
token := WebAuthn{
Email: email,
PublicKeyData: sqlxTypes.JSONText(credj),
}
return o.SaveWebAuthn(&token)
}