blob: ec581897337ddf9d5646cc9678784438190807e3 (
plain) (
blame)
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
|
package proxy
import (
"errors"
"fmt"
"sync"
)
var (
ErrEmptyAuthBackendName = errors.New("auth backend name is empty")
ErrNilAuthBackend = errors.New("auth backend is nil")
ErrBuiltinAuthBackend = errors.New("auth backend name collision with builtin")
)
var (
authBackends map[string]AuthBackend
authBackendsMu sync.Mutex
authBackendsOnce sync.Once
)
// Auth returns an authentication backend by name or false if it doesn't exist.
func Auth(name string) (AuthBackend, bool) {
authBackendsMu.Lock()
defer authBackendsMu.Unlock()
ab, ok := authBackends[name]
return ab, ok
}
// RegisterAuthBackend registers a new authentication backend implementation.
// The name must be unique, non-empty and must not collide
// with a builtin authentication backend.
// The authentication backend must be non-nil.
// Registered backends can be enabled by specifying their name
// in the AuthBackend config option.
// Backend-specific configuration is handled by the calling plugin's
// configuration mechanism at initialization time.
// Backends must be registered at initialization time
// (before the init functions return).
// Backends registered after initialization time will not be available
// to the user.
func RegisterAuthBackend(name string, ab AuthBackend) error {
initAuthBackends()
if name == "" {
return ErrEmptyAuthBackendName
}
if ab == nil {
return ErrNilAuthBackend
}
if name == "files" || name == "mtsqlite3" || name == "mtpostgresql" {
return ErrBuiltinAuthBackend
}
if _, ok := authBackends[name]; ok {
return fmt.Errorf("duplicate auth backend %s", name)
}
authBackendsMu.Lock()
defer authBackendsMu.Unlock()
authBackends[name] = ab
return nil
}
func initAuthBackends() {
authBackendsOnce.Do(func() {
authBackendsMu.Lock()
defer authBackendsMu.Unlock()
authBackends = make(map[string]AuthBackend)
})
}
|
