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
|
// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jwt
import (
"fmt"
"github.com/tink-crypto/tink-go/v2/internal/internalapi"
"github.com/tink-crypto/tink-go/v2/internal/internalregistry"
"github.com/tink-crypto/tink-go/v2/internal/monitoringutil"
"github.com/tink-crypto/tink-go/v2/internal/primitiveset"
"github.com/tink-crypto/tink-go/v2/keyset"
"github.com/tink-crypto/tink-go/v2/monitoring"
)
// NewSigner generates a new instance of the JWT Signer primitive.
func NewSigner(handle *keyset.Handle) (Signer, error) {
if handle == nil {
return nil, fmt.Errorf("keyset handle can't be nil")
}
ps, err := keyset.Primitives[Signer](handle, internalapi.Token{})
if err != nil {
return nil, fmt.Errorf("jwt_signer_factory: cannot obtain primitive set: %v", err)
}
logger, err := createSignerLogger(ps)
if err != nil {
return nil, err
}
if ps.Primary.FullPrimitive == nil {
// Something is wrong, this should not happen.
return nil, fmt.Errorf("jwt_signer_factory: primary full primitive is nil")
}
return &wrappedSigner{
primaryFullPrimitive: ps.Primary.FullPrimitive,
keyID: ps.Primary.KeyID,
logger: logger,
}, nil
}
// wrappedSigner is a JWT Signer implementation that uses the underlying
// primary full primitive for signing. It logs success/failure of the signing
// operation.
type wrappedSigner struct {
primaryFullPrimitive Signer
keyID uint32
logger monitoring.Logger
}
var _ Signer = (*wrappedSigner)(nil)
func createSignerLogger[T any](ps *primitiveset.PrimitiveSet[T]) (monitoring.Logger, error) {
// Only keysets with annotations are monitored.
if len(ps.Annotations) == 0 {
return &monitoringutil.DoNothingLogger{}, nil
}
keysetInfo, err := monitoringutil.KeysetInfoFromPrimitiveSet(ps)
if err != nil {
return nil, err
}
return internalregistry.GetMonitoringClient().NewLogger(&monitoring.Context{
KeysetInfo: keysetInfo,
Primitive: "jwtsign",
APIFunction: "sign",
})
}
func (w *wrappedSigner) SignAndEncode(rawJWT *RawJWT) (string, error) {
token, err := w.primaryFullPrimitive.SignAndEncode(rawJWT)
if err != nil {
w.logger.LogFailure()
return "", err
}
w.logger.Log(w.keyID, 1)
return token, nil
}
|
