-
Notifications
You must be signed in to change notification settings - Fork 0
/
util.go
83 lines (69 loc) · 2.08 KB
/
util.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
// Copyright 2017 The Kubernetes Authors.
//
// 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 jwe
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
)
// Credits to David W. https://stackoverflow.com/a/44688503
// ExportRSAKeyOrDie exports rsa key object to a private/public strings. In case of fail panic is called.
func ExportRSAKeyOrDie(privKey *rsa.PrivateKey) (priv, pub string) {
privkey_bytes := x509.MarshalPKCS1PrivateKey(privKey)
privkey_pem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: privkey_bytes,
},
)
priv = string(privkey_pem)
pubkey_bytes, err := x509.MarshalPKIXPublicKey(&privKey.PublicKey)
if err != nil {
panic(err)
}
pubkey_pem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: pubkey_bytes,
},
)
pub = string(pubkey_pem)
return
}
// ParseRSAKey parses private/public key strings and returns rsa key object or error.
func ParseRSAKey(privStr, pubStr string) (*rsa.PrivateKey, error) {
block, _ := pem.Decode([]byte(privStr))
if block == nil {
return nil, errors.New("Failed to parse PEM block containing the key")
}
priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return nil, err
}
block, _ = pem.Decode([]byte(pubStr))
if block == nil {
return nil, errors.New("Failed to parse PEM block containing the key")
}
pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
return nil, err
}
pub, ok := pubInterface.(*rsa.PublicKey)
if !ok {
return nil, errors.New("Failed to parse public key")
}
priv.PublicKey = *pub
return priv, nil
}