prysm-pulse/crypto/bls/signature_batch_test.go
Ye Ding e43152102e
Identify invalid signature within batch verification (#11582) (#11741)
* Identify invalid signature within batch verification (#11582)

* Fix issues found by linter

* Make deepsource happy

* Add signature description enums

* Make descriptions a mandatory field

* More readable error message of invalid signatures

* Add 'enable-verbose-sig-verification' option

* Fix format

* Move descriptions to package signing

* Add more validation and test cases

* Fix build failure

Co-authored-by: Nishant Das <nishdas93@gmail.com>
2022-12-20 18:41:47 +08:00

745 lines
23 KiB
Go

package bls
import (
"bytes"
"fmt"
"reflect"
"sort"
"testing"
"github.com/prysmaticlabs/prysm/v3/crypto/bls/common"
"github.com/prysmaticlabs/prysm/v3/testing/assert"
"github.com/prysmaticlabs/prysm/v3/testing/require"
)
const TestSignature = "test signature"
func TestCopySignatureSet(t *testing.T) {
t.Run("blst", func(t *testing.T) {
key, err := RandKey()
assert.NoError(t, err)
key2, err := RandKey()
assert.NoError(t, err)
key3, err := RandKey()
assert.NoError(t, err)
message := [32]byte{'C', 'D'}
message2 := [32]byte{'E', 'F'}
message3 := [32]byte{'H', 'I'}
sig := key.Sign(message[:])
sig2 := key2.Sign(message2[:])
sig3 := key3.Sign(message3[:])
set := &SignatureBatch{
Signatures: [][]byte{sig.Marshal()},
PublicKeys: []PublicKey{key.PublicKey()},
Messages: [][32]byte{message},
Descriptions: createDescriptions(1),
}
set2 := &SignatureBatch{
Signatures: [][]byte{sig2.Marshal()},
PublicKeys: []PublicKey{key.PublicKey()},
Messages: [][32]byte{message},
Descriptions: createDescriptions(1),
}
set3 := &SignatureBatch{
Signatures: [][]byte{sig3.Marshal()},
PublicKeys: []PublicKey{key.PublicKey()},
Messages: [][32]byte{message},
Descriptions: createDescriptions(1),
}
aggSet := set.Join(set2).Join(set3)
aggSet2 := aggSet.Copy()
assert.DeepEqual(t, aggSet, aggSet2)
})
}
func TestVerifyVerbosely_AllSignaturesValid(t *testing.T) {
set := NewValidSignatureSet(t, "good", 3)
valid, err := set.VerifyVerbosely()
assert.NoError(t, err)
assert.Equal(t, true, valid, "SignatureSet is expected to be valid")
}
func TestVerifyVerbosely_SomeSignaturesInvalid(t *testing.T) {
goodSet := NewValidSignatureSet(t, "good", 3)
badSet := NewInvalidSignatureSet(t, "bad", 3, false)
set := NewSet().Join(goodSet).Join(badSet)
valid, err := set.VerifyVerbosely()
assert.Equal(t, false, valid, "SignatureSet is expected to be invalid")
assert.StringContains(t, "signature 'signature of bad0' is invalid", err.Error())
assert.StringContains(t, "signature 'signature of bad1' is invalid", err.Error())
assert.StringContains(t, "signature 'signature of bad2' is invalid", err.Error())
assert.StringNotContains(t, "signature 'signature of good0' is invalid", err.Error())
assert.StringNotContains(t, "signature 'signature of good1' is invalid", err.Error())
assert.StringNotContains(t, "signature 'signature of good2' is invalid", err.Error())
}
func TestVerifyVerbosely_VerificationThrowsError(t *testing.T) {
goodSet := NewValidSignatureSet(t, "good", 1)
badSet := NewInvalidSignatureSet(t, "bad", 1, true)
set := NewSet().Join(goodSet).Join(badSet)
valid, err := set.VerifyVerbosely()
assert.Equal(t, false, valid, "SignatureSet is expected to be invalid")
assert.StringContains(t, "signature 'signature of bad0' is invalid", err.Error())
assert.StringContains(t, "error: could not unmarshal bytes into signature", err.Error())
assert.StringNotContains(t, "signature 'signature of good0' is invalid", err.Error())
}
func TestSignatureBatch_RemoveDuplicates(t *testing.T) {
var keys []SecretKey
for i := 0; i < 100; i++ {
key, err := RandKey()
assert.NoError(t, err)
keys = append(keys, key)
}
tests := []struct {
name string
batchCreator func() (input *SignatureBatch, output *SignatureBatch)
want int
}{
{
name: "empty batch",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
return &SignatureBatch{}, &SignatureBatch{}
},
want: 0,
},
{
name: "valid duplicates in batch",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:20]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
allSigs := append(signatures, signatures...)
allPubs := append(pubs, pubs...)
allMsgs := append(messages, messages...)
return &SignatureBatch{
Signatures: allSigs,
PublicKeys: allPubs,
Messages: allMsgs,
Descriptions: createDescriptions(len(allMsgs)),
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(allMsgs)),
}
},
want: 20,
},
{
name: "valid duplicates in batch with multiple messages",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
allSigs := append(signatures, signatures...)
allPubs := append(pubs, pubs...)
allMsgs := append(messages, messages...)
return &SignatureBatch{
Signatures: allSigs,
PublicKeys: allPubs,
Messages: allMsgs,
Descriptions: createDescriptions(len(allMsgs)),
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(allMsgs)),
}
},
want: 30,
},
{
name: "no duplicates in batch with multiple messages",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}
},
want: 0,
},
{
name: "valid duplicates and invalid duplicates in batch with multiple messages",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
allSigs := append(signatures, signatures...)
// Make it a non-unique entry
allSigs[10] = make([]byte, 96)
allPubs := append(pubs, pubs...)
allMsgs := append(messages, messages...)
// Insert it back at the end
signatures = append(signatures, signatures[10])
pubs = append(pubs, pubs[10])
messages = append(messages, messages[10])
// Zero out to expected result
signatures[10] = make([]byte, 96)
return &SignatureBatch{
Signatures: allSigs,
PublicKeys: allPubs,
Messages: allMsgs,
Descriptions: createDescriptions(len(allMsgs)),
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(allMsgs)),
}
},
want: 29,
},
{
name: "valid duplicates and invalid duplicates with signature,pubkey,message in batch with multiple messages",
batchCreator: func() (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
allSigs := append(signatures, signatures...)
// Make it a non-unique entry
allSigs[10] = make([]byte, 96)
allPubs := append(pubs, pubs...)
allPubs[20] = keys[len(keys)-1].PublicKey()
allMsgs := append(messages, messages...)
allMsgs[29] = [32]byte{'j', 'u', 'n', 'k'}
// Insert it back at the end
signatures = append(signatures, signatures[10])
pubs = append(pubs, pubs[10])
messages = append(messages, messages[10])
// Zero out to expected result
signatures[10] = make([]byte, 96)
// Insert it back at the end
signatures = append(signatures, signatures[20])
pubs = append(pubs, pubs[20])
messages = append(messages, messages[20])
// Zero out to expected result
pubs[20] = keys[len(keys)-1].PublicKey()
// Insert it back at the end
signatures = append(signatures, signatures[29])
pubs = append(pubs, pubs[29])
messages = append(messages, messages[29])
messages[29] = [32]byte{'j', 'u', 'n', 'k'}
return &SignatureBatch{
Signatures: allSigs,
PublicKeys: allPubs,
Messages: allMsgs,
Descriptions: createDescriptions(len(allMsgs)),
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}
},
want: 27,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
input, output := tt.batchCreator()
num, res, err := input.RemoveDuplicates()
assert.NoError(t, err)
if num != tt.want {
t.Errorf("RemoveDuplicates() got = %v, want %v", num, tt.want)
}
if !reflect.DeepEqual(res.Signatures, output.Signatures) {
t.Errorf("RemoveDuplicates() Signatures output = %v, want %v", res.Signatures, output.Signatures)
}
if !reflect.DeepEqual(res.PublicKeys, output.PublicKeys) {
t.Errorf("RemoveDuplicates() Publickeys output = %v, want %v", res.PublicKeys, output.PublicKeys)
}
if !reflect.DeepEqual(res.Messages, output.Messages) {
t.Errorf("RemoveDuplicates() Messages output = %v, want %v", res.Messages, output.Messages)
}
})
}
}
func TestSignatureBatch_AggregateBatch(t *testing.T) {
var keys []SecretKey
for i := 0; i < 100; i++ {
key, err := RandKey()
assert.NoError(t, err)
keys = append(keys, key)
}
tests := []struct {
name string
batchCreator func(t *testing.T) (input *SignatureBatch, output *SignatureBatch)
wantErr bool
}{
{
name: "empty batch",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
return &SignatureBatch{Signatures: nil, Messages: nil, PublicKeys: nil, Descriptions: nil},
&SignatureBatch{Signatures: nil, Messages: nil, PublicKeys: nil, Descriptions: nil}
},
wantErr: false,
},
{
name: "mismatch number of signatures and messages in batch",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
key1 := keys[0]
key2 := keys[1]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
sig1 := key1.Sign(msg[:])
sig2 := key2.Sign(msg[:])
signatures := [][]byte{sig1.Marshal(), sig2.Marshal()}
pubs := []common.PublicKey{key1.PublicKey(), key2.PublicKey()}
messages := [][32]byte{msg}
descs := createDescriptions(2)
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: descs,
}, &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: descs,
}
},
wantErr: true,
},
{
name: "valid signatures in batch",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:20]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
aggSig, err := AggregateCompressedSignatures(signatures)
assert.NoError(t, err)
aggPub := AggregateMultiplePubkeys(pubs)
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}, &SignatureBatch{
Signatures: [][]byte{aggSig.Marshal()},
PublicKeys: []PublicKey{aggPub},
Messages: [][32]byte{msg},
Descriptions: createDescriptions(1, AggregatedSignature),
}
},
wantErr: false,
},
{
name: "invalid signatures in batch",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:20]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
signatures[10] = make([]byte, 96)
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}, nil
},
wantErr: true,
},
{
name: "valid aggregates in batch with multiple messages",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
aggSig1, err := AggregateCompressedSignatures(signatures[:10])
assert.NoError(t, err)
aggSig2, err := AggregateCompressedSignatures(signatures[10:20])
assert.NoError(t, err)
aggSig3, err := AggregateCompressedSignatures(signatures[20:30])
assert.NoError(t, err)
aggPub1 := AggregateMultiplePubkeys(pubs[:10])
aggPub2 := AggregateMultiplePubkeys(pubs[10:20])
aggPub3 := AggregateMultiplePubkeys(pubs[20:30])
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}, &SignatureBatch{
Signatures: [][]byte{aggSig1.Marshal(), aggSig2.Marshal(), aggSig3.Marshal()},
PublicKeys: []PublicKey{aggPub1, aggPub2, aggPub3},
Messages: [][32]byte{msg, msg1, msg2},
Descriptions: createDescriptions(3, AggregatedSignature),
}
},
wantErr: false,
},
{
name: "common and uncommon messages in batch with multiple messages",
batchCreator: func(t *testing.T) (*SignatureBatch, *SignatureBatch) {
chosenKeys := keys[:30]
msg := [32]byte{'r', 'a', 'n', 'd', 'o', 'm'}
msg1 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '1'}
msg2 := [32]byte{'r', 'a', 'n', 'd', 'o', 'm', '2'}
var signatures [][]byte
var messages [][32]byte
var pubs []PublicKey
for _, k := range chosenKeys[:10] {
s := k.Sign(msg[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[10:20] {
s := k.Sign(msg1[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg1)
pubs = append(pubs, k.PublicKey())
}
for _, k := range chosenKeys[20:30] {
s := k.Sign(msg2[:])
signatures = append(signatures, s.Marshal())
messages = append(messages, msg2)
pubs = append(pubs, k.PublicKey())
}
// Set a custom message
messages[5][31] ^= byte(100)
messages[15][31] ^= byte(100)
messages[25][31] ^= byte(100)
var newSigs [][]byte
newSigs = append(newSigs, signatures[:5]...)
newSigs = append(newSigs, signatures[6:10]...)
aggSig1, err := AggregateCompressedSignatures(newSigs)
assert.NoError(t, err)
newSigs = [][]byte{}
newSigs = append(newSigs, signatures[10:15]...)
newSigs = append(newSigs, signatures[16:20]...)
aggSig2, err := AggregateCompressedSignatures(newSigs)
assert.NoError(t, err)
newSigs = [][]byte{}
newSigs = append(newSigs, signatures[20:25]...)
newSigs = append(newSigs, signatures[26:30]...)
aggSig3, err := AggregateCompressedSignatures(newSigs)
assert.NoError(t, err)
var newPubs []PublicKey
newPubs = append(newPubs, pubs[:5]...)
newPubs = append(newPubs, pubs[6:10]...)
aggPub1 := AggregateMultiplePubkeys(newPubs)
newPubs = []PublicKey{}
newPubs = append(newPubs, pubs[10:15]...)
newPubs = append(newPubs, pubs[16:20]...)
aggPub2 := AggregateMultiplePubkeys(newPubs)
newPubs = []PublicKey{}
newPubs = append(newPubs, pubs[20:25]...)
newPubs = append(newPubs, pubs[26:30]...)
aggPub3 := AggregateMultiplePubkeys(newPubs)
return &SignatureBatch{
Signatures: signatures,
PublicKeys: pubs,
Messages: messages,
Descriptions: createDescriptions(len(messages)),
}, &SignatureBatch{
Signatures: [][]byte{aggSig1.Marshal(), signatures[5], aggSig2.Marshal(), signatures[15], aggSig3.Marshal(), signatures[25]},
PublicKeys: []PublicKey{aggPub1, pubs[5], aggPub2, pubs[15], aggPub3, pubs[25]},
Messages: [][32]byte{msg, messages[5], msg1, messages[15], msg2, messages[25]},
Descriptions: []string{AggregatedSignature, TestSignature, AggregatedSignature, TestSignature, AggregatedSignature, TestSignature},
}
},
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
input, output := tt.batchCreator(t)
got, err := input.AggregateBatch()
if (err != nil) != tt.wantErr {
t.Errorf("AggregateBatch() error = %v, wantErr %v", err, tt.wantErr)
return
}
if tt.wantErr {
return
}
got = sortSet(got)
output = sortSet(output)
if !reflect.DeepEqual(got.Signatures, output.Signatures) {
t.Errorf("AggregateBatch() Signatures got = %v, want %v", got.Signatures, output.Signatures)
}
if !reflect.DeepEqual(got.PublicKeys, output.PublicKeys) {
t.Errorf("AggregateBatch() PublicKeys got = %v, want %v", got.PublicKeys, output.PublicKeys)
}
if !reflect.DeepEqual(got.Messages, output.Messages) {
t.Errorf("AggregateBatch() Messages got = %v, want %v", got.Messages, output.Messages)
}
if !reflect.DeepEqual(got.Descriptions, output.Descriptions) {
t.Errorf("AggregateBatch() Descriptions got = %v, want %v", got.Descriptions, output.Descriptions)
}
})
}
}
func NewValidSignatureSet(t *testing.T, msgBody string, num int) *SignatureBatch {
set := &SignatureBatch{
Signatures: make([][]byte, num),
PublicKeys: make([]common.PublicKey, num),
Messages: make([][32]byte, num),
Descriptions: make([]string, num),
}
for i := 0; i < num; i++ {
priv, err := RandKey()
require.NoError(t, err)
pubkey := priv.PublicKey()
msg := messageBytes(fmt.Sprintf("%s%d", msgBody, i))
sig := priv.Sign(msg[:]).Marshal()
desc := fmt.Sprintf("signature of %s%d", msgBody, i)
set.Signatures[i] = sig
set.PublicKeys[i] = pubkey
set.Messages[i] = msg
set.Descriptions[i] = desc
}
return set
}
func NewInvalidSignatureSet(t *testing.T, msgBody string, num int, throwErr bool) *SignatureBatch {
set := &SignatureBatch{
Signatures: make([][]byte, num),
PublicKeys: make([]common.PublicKey, num),
Messages: make([][32]byte, num),
Descriptions: make([]string, num),
}
for i := 0; i < num; i++ {
priv, err := RandKey()
require.NoError(t, err)
pubkey := priv.PublicKey()
msg := messageBytes(fmt.Sprintf("%s%d", msgBody, i))
var sig []byte
if throwErr {
sig = make([]byte, 96)
} else {
badMsg := messageBytes("badmsg")
sig = priv.Sign(badMsg[:]).Marshal()
}
desc := fmt.Sprintf("signature of %s%d", msgBody, i)
set.Signatures[i] = sig
set.PublicKeys[i] = pubkey
set.Messages[i] = msg
set.Descriptions[i] = desc
}
return set
}
func messageBytes(message string) [32]byte {
bytes := [32]byte{}
copy(bytes[:], []byte(message))
return bytes
}
func createDescriptions(length int, text ...string) []string {
desc := make([]string, length)
for i := range desc {
if len(text) > 0 {
desc[i] = text[0]
} else {
desc[i] = TestSignature
}
}
return desc
}
func sortSet(s *SignatureBatch) *SignatureBatch {
sort.Sort(sorter{set: s})
return s
}
type sorter struct {
set *SignatureBatch
}
func (s sorter) Len() int {
return len(s.set.Messages)
}
func (s sorter) Swap(i, j int) {
s.set.Signatures[i], s.set.Signatures[j] = s.set.Signatures[j], s.set.Signatures[i]
s.set.PublicKeys[i], s.set.PublicKeys[j] = s.set.PublicKeys[j], s.set.PublicKeys[i]
s.set.Messages[i], s.set.Messages[j] = s.set.Messages[j], s.set.Messages[i]
}
func (s sorter) Less(i, j int) bool {
return bytes.Compare(s.set.Messages[i][:], s.set.Messages[j][:]) == -1
}