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
|
//
// Copyright (c) SAS Institute Inc.
//
// 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 p11token
import (
"context"
"crypto"
"crypto/rand"
"errors"
"fmt"
"io"
"github.com/miekg/pkcs11"
"github.com/sassoftware/relic/v7/config"
"github.com/sassoftware/relic/v7/signers/sigerrors"
"github.com/sassoftware/relic/v7/token"
)
type Key struct {
PgpCertificate string
X509Certificate string
token *Token
keyConf *config.KeyConfig
keyType uint
pub pkcs11.ObjectHandle
priv pkcs11.ObjectHandle
pubParsed crypto.PublicKey
}
func (token *Token) GetKey(ctx context.Context, keyName string) (token.Key, error) {
token.mutex.Lock()
defer token.mutex.Unlock()
keyConf, err := token.config.GetKey(keyName)
if err != nil {
return nil, err
}
return token.getKey(keyConf, keyName)
}
func (token *Token) getKey(keyConf *config.KeyConfig, keyName string) (*Key, error) {
var err error
key := &Key{
token: token,
keyConf: keyConf,
PgpCertificate: keyConf.PgpCertificate,
X509Certificate: keyConf.X509Certificate,
}
key.priv, err = token.findKey(keyConf, pkcs11.CKO_PRIVATE_KEY)
if err != nil {
return nil, err
}
key.pub, err = token.findKey(keyConf, pkcs11.CKO_PUBLIC_KEY)
if err != nil {
return nil, err
}
keyTypeBlob := token.getAttribute(key.priv, pkcs11.CKA_KEY_TYPE)
if len(keyTypeBlob) == 0 {
return nil, errors.New("private key: CKA_KEY_TYPE is missing")
}
key.keyType, err = getUlong(keyTypeBlob)
if err != nil {
return nil, fmt.Errorf("private key: CKA_KEY_TYPE: %w", err)
}
switch key.keyType {
case CKK_RSA:
key.pubParsed, err = key.toRsaKey()
case CKK_ECDSA:
key.pubParsed, err = key.toEcdsaKey()
default:
return nil, errors.New("Unsupported key type")
}
if err != nil {
return nil, err
}
return key, nil
}
func (token *Token) findKey(keyConf *config.KeyConfig, class uint) (pkcs11.ObjectHandle, error) {
attrs := []*pkcs11.Attribute{
pkcs11.NewAttribute(pkcs11.CKA_CLASS, class),
}
if keyConf.Label != "" {
attrs = append(attrs, pkcs11.NewAttribute(pkcs11.CKA_LABEL, keyConf.Label))
}
if keyConf.ID != "" {
keyID, err := parseKeyID(keyConf.ID)
if err != nil {
return 0, err
}
attrs = append(attrs, pkcs11.NewAttribute(pkcs11.CKA_ID, keyID))
}
objects, err := token.findObject(attrs)
if err != nil {
return 0, err
} else if len(objects) > 1 {
return 0, errors.New("Multiple token objects with the specified attributes")
} else if len(objects) == 0 {
return 0, sigerrors.KeyNotFoundError{}
}
return objects[0], nil
}
func (key *Key) Config() *config.KeyConfig {
return key.keyConf
}
func (key *Key) Certificate() []byte {
return nil
}
func (key *Key) Public() crypto.PublicKey {
return key.pubParsed
}
func (key *Key) getLabel() string {
key.token.mutex.Lock()
defer key.token.mutex.Unlock()
return string(key.token.getAttribute(key.priv, pkcs11.CKA_LABEL))
}
func (key *Key) GetID() []byte {
key.token.mutex.Lock()
defer key.token.mutex.Unlock()
return key.token.getAttribute(key.priv, pkcs11.CKA_ID)
}
func (key *Key) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
key.token.mutex.Lock()
defer key.token.mutex.Unlock()
switch key.keyType {
case CKK_RSA:
return key.signRSA(digest, opts)
case CKK_ECDSA:
return key.signECDSA(digest)
default:
return nil, errors.New("Unsupported key type")
}
}
func (key *Key) SignContext(ctx context.Context, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
return key.Sign(rand.Reader, digest, opts)
}
|
