-
Notifications
You must be signed in to change notification settings - Fork 47
/
webidentity.go
294 lines (249 loc) · 8.91 KB
/
webidentity.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
package auth
import (
"context"
"encoding/gob"
"fmt"
"net/url"
"flamingo.me/flamingo/v3/framework/config"
"flamingo.me/flamingo/v3/framework/flamingo"
"flamingo.me/flamingo/v3/framework/web"
)
type (
// RequestIdentifierFactory creates RequestIdentifier
RequestIdentifierFactory func(config config.Map) (RequestIdentifier, error)
// RequestIdentifier identifies an request and returns a matching identity
RequestIdentifier interface {
Broker() string
Identify(ctx context.Context, request *web.Request) (Identity, error)
}
// WebAuthenticater allows to request an authentication
WebAuthenticater interface {
Authenticate(ctx context.Context, request *web.Request) web.Result
}
// WebCallbacker is called for callbacks to that identity broker
WebCallbacker interface {
Callback(ctx context.Context, request *web.Request, returnTo func(*web.Request) *url.URL) web.Result
}
// WebLogouter logs user out
WebLogouter interface {
Logout(ctx context.Context, request *web.Request)
}
// WebLogoutWithRedirect logs user out and redirects to an sso logout endpoint
WebLogoutWithRedirect interface {
Logout(ctx context.Context, request *web.Request) *url.URL
}
// WebIdentityRefresher refreshs an existing identity, e.g. by invalidating cached session data
WebIdentityRefresher interface {
RefreshIdentity(ctx context.Context, request *web.Request) error
}
// WebIdentityService calls one or more identifier to get all possible identities of a user
WebIdentityService struct {
identityProviders []RequestIdentifier
reverseRouter web.ReverseRouter
eventRouter flamingo.EventRouter
responder *web.Responder
}
// WebLoginEvent for the current request
WebLoginEvent struct {
Request *web.Request
Broker string
Identity Identity
}
// WebLogoutEvent for the current request
WebLogoutEvent struct {
Request *web.Request
Broker string
}
// IdentityTypeChecker for type asserting an Identity
IdentityTypeChecker func(identity Identity) bool
)
// Inject dependencies
func (s *WebIdentityService) Inject(
identityProviders []RequestIdentifier,
reverseRouter web.ReverseRouter,
eventRouter flamingo.EventRouter,
responder *web.Responder,
) *WebIdentityService {
s.identityProviders = identityProviders
s.reverseRouter = reverseRouter
s.eventRouter = eventRouter
s.responder = responder
return s
}
// Identify the user, if any identity is found
func (s *WebIdentityService) Identify(ctx context.Context, request *web.Request) Identity {
if s == nil {
return nil
}
for _, provider := range s.identityProviders {
if identity, _ := provider.Identify(ctx, request); identity != nil {
return identity
}
}
return nil
}
// IdentifyFor the user with a given broker
func (s *WebIdentityService) IdentifyFor(ctx context.Context, broker string, request *web.Request) (Identity, error) {
for _, provider := range s.identityProviders {
if provider.Broker() == broker {
return provider.Identify(ctx, request)
}
}
return nil, fmt.Errorf("no broker with code %q found", broker)
}
// IdentifyAll collects all possible user identites, in case multiple are available
func (s *WebIdentityService) IdentifyAll(ctx context.Context, request *web.Request) []Identity {
var identities []Identity
for _, provider := range s.identityProviders {
if identity, _ := provider.Identify(ctx, request); identity != nil {
identities = append(identities, identity)
}
}
return identities
}
// IdentifyAs returns an identity for a given interface
// identity, err := s.IdentifyAs(ctx, request, OpenIDTypeChecker)
// identity.(oauth.OpenIDIdentity)
func (s *WebIdentityService) IdentifyAs(ctx context.Context, request *web.Request, checkType IdentityTypeChecker) (Identity, error) {
if s == nil {
return nil, fmt.Errorf("web identity service is nil")
}
for _, provider := range s.identityProviders {
if identity, _ := provider.Identify(ctx, request); identity != nil {
if checkType(identity) {
return identity, nil
}
}
}
return nil, fmt.Errorf("no identity for type %T found", checkType)
}
func (s *WebIdentityService) storeRedirectURL(request *web.Request) {
redirecturl, ok := request.Params["redirecturl"]
if !ok || redirecturl == "" {
u, err := s.reverseRouter.Absolute(request, "", nil)
if err == nil {
redirecturl = u.String()
}
}
absolute, _ := s.reverseRouter.Absolute(request, "", nil)
refURL, err := url.Parse(redirecturl)
if err != nil || (redirecturl[0] != '/' && (refURL.Host != request.Request().Host && refURL.Host != absolute.Host)) {
redirecturl = absolute.String()
}
request.Session().Store("core.auth.redirect", redirecturl)
}
func (s *WebIdentityService) getRedirectURL(request *web.Request) *url.URL {
redirectURL, ok := request.Session().Load("core.auth.redirect")
if !ok {
rurl, _ := s.reverseRouter.Absolute(request, "", nil)
return rurl
}
rurl, err := url.Parse(redirectURL.(string))
if err != nil {
rurl, _ = s.reverseRouter.Absolute(request, "", nil)
}
return rurl
}
// Authenticate finds the first available (enforced) authentication result
func (s *WebIdentityService) Authenticate(ctx context.Context, request *web.Request) (string, web.Result) {
for _, provider := range s.identityProviders {
if authenticator, ok := provider.(WebAuthenticater); ok {
if result := authenticator.Authenticate(ctx, request); result != nil {
s.storeRedirectURL(request)
return provider.Broker(), result
}
}
}
return "", nil
}
// AuthenticateFor starts the authentication for a given broker
func (s *WebIdentityService) AuthenticateFor(ctx context.Context, broker string, request *web.Request) web.Result {
for _, provider := range s.identityProviders {
if provider.Broker() == broker {
if authenticator, ok := provider.(WebAuthenticater); ok {
if result := authenticator.Authenticate(ctx, request); result != nil {
s.storeRedirectURL(request)
return result
}
}
return nil
}
}
return nil
}
func (s *WebIdentityService) callback(ctx context.Context, request *web.Request) web.Result {
broker := request.Params["broker"]
for _, provider := range s.identityProviders {
if provider.Broker() == broker {
return provider.(WebCallbacker).Callback(ctx, request, s.getRedirectURL)
}
}
return nil
}
func (s *WebIdentityService) logoutRedirect(request *web.Request, postLogoutRedirect *url.URL) web.Result {
if len(s.getLogoutRedirects(request)) > 0 {
if postLogoutRedirect != nil {
request.Session().Store("core.auth.logoutredirect", postLogoutRedirect)
} else {
request.Session().Delete("core.auth.logoutredirect")
}
return s.responder.RouteRedirect("core.auth.logoutCallback", nil)
}
if postLogoutRedirect != nil {
return s.responder.URLRedirect(postLogoutRedirect)
}
return s.responder.RouteRedirect("", nil)
}
func (s *WebIdentityService) logout(ctx context.Context, request *web.Request, postLogoutRedirect *url.URL, broker string, all bool) web.Result {
s.storeLogoutRedirects(request, redirectURLlist{})
for _, provider := range s.identityProviders {
if provider.Broker() == broker || all {
if authenticator, ok := provider.(WebLogouter); ok {
authenticator.Logout(ctx, request)
s.eventRouter.Dispatch(ctx, &WebLogoutEvent{Request: request, Broker: provider.Broker()})
} else if authenticator, ok := provider.(WebLogoutWithRedirect); ok {
s.addLogoutRedirect(request, authenticator.Logout(ctx, request))
s.eventRouter.Dispatch(ctx, &WebLogoutEvent{Request: request, Broker: provider.Broker()})
}
}
}
return s.logoutRedirect(request, postLogoutRedirect)
}
// Logout logs all user out
func (s *WebIdentityService) Logout(ctx context.Context, request *web.Request, postLogoutRedirect *url.URL) web.Result {
return s.logout(ctx, request, postLogoutRedirect, "", true)
}
// LogoutFor logs a specific broker out
func (s *WebIdentityService) LogoutFor(ctx context.Context, broker string, request *web.Request, postLogoutRedirect *url.URL) web.Result {
return s.logout(ctx, request, postLogoutRedirect, broker, false)
}
// RequestIdentifier returns the given request identifier
func (s *WebIdentityService) RequestIdentifier(broker string) RequestIdentifier {
for _, provider := range s.identityProviders {
if provider.Broker() == broker {
return provider
}
}
return nil
}
type redirectURLlist []*url.URL
func init() {
gob.Register(redirectURLlist{})
gob.Register(new(url.URL))
}
func (s *WebIdentityService) addLogoutRedirect(request *web.Request, u *url.URL) {
if u == nil {
return
}
redirects := s.getLogoutRedirects(request)
redirects = append(redirects, u)
s.storeLogoutRedirects(request, redirects)
}
func (s *WebIdentityService) getLogoutRedirects(request *web.Request) []*url.URL {
rawredirects, _ := request.Session().Load("core.auth.logoutredirects")
redirects, _ := rawredirects.(redirectURLlist)
return redirects
}
func (s *WebIdentityService) storeLogoutRedirects(request *web.Request, redirects []*url.URL) {
request.Session().Store("core.auth.logoutredirects", redirectURLlist(redirects))
}