DragonX/lightwalletd
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parser: use nil to indicate zero-count vectors

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This commit is contained in:
George Tankersley
2018-09-20 21:54:25 +00:00
parent dfb05c261d
commit 2d9cf24f74
1 changed files with 36 additions and 28 deletions
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8
parser/transaction.go
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@@ -276,6 +276,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
// TODO: vector. At the moment we're assuming trusted input. // TODO: vector. At the moment we're assuming trusted input.
// See https://nvd.nist.gov/vuln/detail/CVE-2018-17144 for an example. // See https://nvd.nist.gov/vuln/detail/CVE-2018-17144 for an example.
if txInCount > 0 {
tx.transparentInputs = make([]*txIn, txInCount) tx.transparentInputs = make([]*txIn, txInCount)
for i := 0; i < txInCount; i++ { for i := 0; i < txInCount; i++ {
ti := &txIn{} ti := &txIn{}
@@ -285,12 +286,14 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
} }
tx.transparentInputs[i] = ti tx.transparentInputs[i] = ti
} }
}
var txOutCount uint64 var txOutCount uint64
if ok := s.ReadCompactSize(&txOutCount); !ok { if ok := s.ReadCompactSize(&txOutCount); !ok {
return nil, errors.New("could not read tx_out_count") return nil, errors.New("could not read tx_out_count")
} }
if txOutCount > 0 {
tx.transparentOutputs = make([]*txOut, txOutCount) tx.transparentOutputs = make([]*txOut, txOutCount)
for i := 0; i < txOutCount; i++ { for i := 0; i < txOutCount; i++ {
to := &txOut{} to := &txOut{}
@@ -300,6 +303,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
} }
tx.transparentOutputs[i] = to tx.transparentOutputs[i] = to
} }
}
if ok := s.ReadUint32(&tx.nLockTime); !ok { if ok := s.ReadUint32(&tx.nLockTime); !ok {
return nil, errors.New("could not read nLockTime") return nil, errors.New("could not read nLockTime")
@@ -321,6 +325,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
return nil, errors.New("could not read nShieldedSpend") return nil, errors.New("could not read nShieldedSpend")
} }
if spendCount > 0 {
tx.shieldedSpends = make([]*spend, spendCount) tx.shieldedSpends = make([]*spend, spendCount)
for i := 0; i < spendCount; i++ { for i := 0; i < spendCount; i++ {
newSpend := &spend{} newSpend := &spend{}
@@ -330,12 +335,14 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
} }
tx.shieldedSpends[i] = newSpend tx.shieldedSpends[i] = newSpend
} }
}
var outputCount uint64 var outputCount uint64
if ok := s.ReadCompactSize(&outputCount); !ok { if ok := s.ReadCompactSize(&outputCount); !ok {
return nil, errors.New("could not read nShieldedOutput") return nil, errors.New("could not read nShieldedOutput")
} }
if outputCount > 0 {
tx.shieldedOutputs = make([]*output, outputCount) tx.shieldedOutputs = make([]*output, outputCount)
for i := 0; i < outputCount; i++ { for i := 0; i < outputCount; i++ {
newOutput := &output{} newOutput := &output{}
@@ -346,6 +353,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
tx.shieldedOutputs[i] = newOutput tx.shieldedOutputs[i] = newOutput
} }
} }
}
if tx.version >= 2 { if tx.version >= 2 {
var joinSplitCount uint64 var joinSplitCount uint64