-
Notifications
You must be signed in to change notification settings - Fork 0
/
verifier.go
186 lines (143 loc) · 3.86 KB
/
verifier.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
175
176
177
178
179
180
181
182
183
184
185
186
package ibft
import (
"bytes"
"encoding/hex"
"github.com/0xDaoChain/go-ibft/messages"
protoIBFT "github.com/0xDaoChain/go-ibft/messages/proto"
"github.com/0xDaoChain/dao-chain/types"
)
// Verifier impl for go-ibft
func (i *backendIBFT) IsValidBlock(proposal []byte) bool {
var (
latestHeader = i.blockchain.Header()
latestBlockNumber = latestHeader.Number
newBlock = &types.Block{}
)
// retrieve the newBlock proposal
if err := newBlock.UnmarshalRLP(proposal); err != nil {
i.logger.Error("IsValidBlock: fail to unmarshal block", "err", err)
return false
}
if latestBlockNumber+1 != newBlock.Number() {
i.logger.Error(
"sequence not correct",
"block", newBlock.Number,
"sequence", latestBlockNumber+1,
)
return false
}
if err := i.verifyHeaderImpl(
latestHeader,
newBlock.Header,
i.currentSigner,
i.currentValidators,
i.currentHooks,
true,
); err != nil {
i.logger.Error("block header verification failed", "err", err)
return false
}
if err := i.blockchain.VerifyPotentialBlock(newBlock); err != nil {
i.logger.Error("block verification failed", "err", err)
return false
}
if err := i.currentHooks.VerifyBlock(newBlock); err != nil {
i.logger.Error("additional block verification failed", "err", err)
return false
}
return true
}
func (i *backendIBFT) IsValidSender(msg *protoIBFT.Message) bool {
msgNoSig, err := msg.PayloadNoSig()
if err != nil {
return false
}
signerAddress, err := i.currentSigner.EcrecoverFromIBFTMessage(
msg.Signature,
msgNoSig,
)
if err != nil {
i.logger.Error("failed to ecrecover message", "err", err)
return false
}
// verify the signature came from the sender
if !bytes.Equal(msg.From, signerAddress.Bytes()) {
i.logger.Error(
"signer address doesn't match with From",
"from", hex.EncodeToString(msg.From),
"signer", signerAddress,
"err", err,
)
return false
}
validators, err := i.forkManager.GetValidators(msg.View.Height)
if err != nil {
return false
}
// verify the sender is in the active validator set
if !validators.Includes(signerAddress) {
i.logger.Error(
"signer address doesn't included in validators",
"signer", signerAddress,
)
return false
}
return true
}
func (i *backendIBFT) IsProposer(id []byte, height, round uint64) bool {
previousHeader, exists := i.blockchain.GetHeaderByNumber(height - 1)
if !exists {
i.logger.Error("header not found", "height", height-1)
return false
}
previousProposer, err := i.extractProposer(previousHeader)
if err != nil {
i.logger.Error("failed to extract the last proposer", "height", height-1, "err", err)
return false
}
nextProposer := CalcProposer(
i.currentValidators,
round,
previousProposer,
)
return types.BytesToAddress(id) == nextProposer.Addr()
}
func (i *backendIBFT) IsValidProposalHash(proposal, hash []byte) bool {
newBlock := &types.Block{}
if err := newBlock.UnmarshalRLP(proposal); err != nil {
i.logger.Error("unable to unmarshal proposal", "err", err)
return false
}
blockHash := newBlock.Header.Hash.Bytes()
return bytes.Equal(blockHash, hash)
}
func (i *backendIBFT) IsValidCommittedSeal(
proposalHash []byte,
committedSeal *messages.CommittedSeal,
) bool {
err := i.currentSigner.VerifyCommittedSeal(
i.currentValidators,
types.BytesToAddress(committedSeal.Signer),
committedSeal.Signature,
proposalHash,
)
if err != nil {
i.logger.Error("IsValidCommittedSeal: failed to verify committed seal", "err", err)
return false
}
return true
}
func (i *backendIBFT) extractProposer(header *types.Header) (types.Address, error) {
if header.Number == 0 {
return types.ZeroAddress, nil
}
signer, err := i.forkManager.GetSigner(header.Number)
if err != nil {
return types.ZeroAddress, err
}
proposer, err := signer.EcrecoverFromHeader(header)
if err != nil {
return types.ZeroAddress, err
}
return proposer, nil
}