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
|
/*
* ZGrab Copyright 2015 Regents of the University of Michigan
*
* 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 json
import (
"crypto/rsa"
"encoding/json"
"fmt"
"math/big"
)
// RSAPublicKey provides JSON methods for the standard rsa.PublicKey.
type RSAPublicKey struct {
*rsa.PublicKey
}
type auxRSAPublicKey struct {
Exponent int `json:"exponent"`
Modulus []byte `json:"modulus"`
Length int `json:"length"`
}
// RSAClientParams are the TLS key exchange parameters for RSA keys.
type RSAClientParams struct {
Length uint16 `json:"length,omitempty"`
EncryptedPMS []byte `json:"encrypted_pre_master_secret,omitempty"`
}
// MarshalJSON implements the json.Marshal interface
func (rp *RSAPublicKey) MarshalJSON() ([]byte, error) {
var aux auxRSAPublicKey
if rp.PublicKey != nil {
aux.Exponent = rp.E
aux.Modulus = rp.N.Bytes()
aux.Length = len(aux.Modulus) * 8
}
return json.Marshal(&aux)
}
// UnmarshalJSON implements the json.Unmarshal interface
func (rp *RSAPublicKey) UnmarshalJSON(b []byte) error {
var aux auxRSAPublicKey
if err := json.Unmarshal(b, &aux); err != nil {
return err
}
if rp.PublicKey == nil {
rp.PublicKey = new(rsa.PublicKey)
}
rp.E = aux.Exponent
rp.N = big.NewInt(0).SetBytes(aux.Modulus)
if len(aux.Modulus)*8 != aux.Length {
return fmt.Errorf("mismatched length (got %d, field specified %d)", len(aux.Modulus), aux.Length)
}
return nil
}
|
