forked from hyperledger/fabric
/
validator_impl.go
174 lines (134 loc) · 4.71 KB
/
validator_impl.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
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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
/*
Copyright IBM Corp. 2016 All Rights Reserved.
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 crypto
import (
"crypto/ecdsa"
"fmt"
"github.com/hyperledger/fabric/core/crypto/primitives"
"github.com/hyperledger/fabric/core/crypto/utils"
obc "github.com/hyperledger/fabric/protos"
)
// Public Struct
type validatorImpl struct {
*peerImpl
// Chain
chainPrivateKey primitives.PrivateKey
}
// TransactionPreValidation verifies that the transaction is
// well formed with the respect to the security layer
// prescriptions (i.e. signature verification).
func (validator *validatorImpl) TransactionPreValidation(tx *obc.Transaction) (*obc.Transaction, error) {
if !validator.isInitialized {
return nil, utils.ErrNotInitialized
}
return validator.peerImpl.TransactionPreValidation(tx)
}
// TransactionPreValidation verifies that the transaction is
// well formed with the respect to the security layer
// prescriptions (i.e. signature verification). If this is the case,
// the method prepares the transaction to be executed.
func (validator *validatorImpl) TransactionPreExecution(tx *obc.Transaction) (*obc.Transaction, error) {
if !validator.isInitialized {
return nil, utils.ErrNotInitialized
}
// validator.debug("Pre executing [%s].", tx.String())
validator.Debugf("Tx confdential level [%s].", tx.ConfidentialityLevel.String())
switch tx.ConfidentialityLevel {
case obc.ConfidentialityLevel_PUBLIC:
// Nothing to do here!
return tx, nil
case obc.ConfidentialityLevel_CONFIDENTIAL:
validator.Debug("Clone and Decrypt.")
// Clone the transaction and decrypt it
newTx, err := validator.deepCloneAndDecryptTx(tx)
if err != nil {
validator.Errorf("Failed decrypting [%s].", err.Error())
return nil, err
}
return newTx, nil
default:
return nil, utils.ErrInvalidConfidentialityLevel
}
}
// Sign signs msg with this validator's signing key and outputs
// the signature if no error occurred.
func (validator *validatorImpl) Sign(msg []byte) ([]byte, error) {
return validator.signWithEnrollmentKey(msg)
}
// Verify checks that signature if a valid signature of message under vkID's verification key.
// If the verification succeeded, Verify returns nil meaning no error occurred.
// If vkID is nil, then the signature is verified against this validator's verification key.
func (validator *validatorImpl) Verify(vkID, signature, message []byte) error {
if len(vkID) == 0 {
return fmt.Errorf("Invalid peer id. It is empty.")
}
if len(signature) == 0 {
return fmt.Errorf("Invalid signature. It is empty.")
}
if len(message) == 0 {
return fmt.Errorf("Invalid message. It is empty.")
}
cert, err := validator.getEnrollmentCert(vkID)
if err != nil {
validator.Errorf("Failed getting enrollment cert for [% x]: [%s]", vkID, err)
return err
}
vk := cert.PublicKey.(*ecdsa.PublicKey)
ok, err := validator.verify(vk, message, signature)
if err != nil {
validator.Errorf("Failed verifying signature for [% x]: [%s]", vkID, err)
return err
}
if !ok {
validator.Errorf("Failed invalid signature for [% x]", vkID)
return utils.ErrInvalidSignature
}
return nil
}
// Private Methods
func (validator *validatorImpl) register(id string, pwd []byte, enrollID, enrollPWD string, regFunc registerFunc) error {
// Register node
if err := validator.peerImpl.register(NodeValidator, id, pwd, enrollID, enrollPWD, nil); err != nil {
validator.Errorf("Failed registering [%s]: [%s]", enrollID, err)
return err
}
return nil
}
func (validator *validatorImpl) init(name string, pwd []byte, regFunc registerFunc) error {
validatorInitFunc := func(eType NodeType, name string, pwd []byte) error {
// Init crypto engine
err := validator.initCryptoEngine()
if err != nil {
validator.Errorf("Failed initiliazing crypto engine [%s].", err.Error())
return err
}
return nil
}
if err := validator.peerImpl.init(NodeValidator, name, pwd, validatorInitFunc); err != nil {
return err
}
return nil
}
func (validator *validatorImpl) initCryptoEngine() (err error) {
// Init chain publicKey
validator.chainPrivateKey, err = validator.eciesSPI.NewPrivateKey(
nil, validator.enrollChainKey.(*ecdsa.PrivateKey),
)
if err != nil {
return
}
return
}
func (validator *validatorImpl) close() error {
return validator.peerImpl.close()
}