parser: use nil to indicate zero-count vectors
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dfb05c261d
commit
2d9cf24f74
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@ -276,6 +276,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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// TODO: vector. At the moment we're assuming trusted input.
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// TODO: vector. At the moment we're assuming trusted input.
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// See https://nvd.nist.gov/vuln/detail/CVE-2018-17144 for an example.
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// See https://nvd.nist.gov/vuln/detail/CVE-2018-17144 for an example.
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if txInCount > 0 {
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tx.transparentInputs = make([]*txIn, txInCount)
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tx.transparentInputs = make([]*txIn, txInCount)
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for i := 0; i < txInCount; i++ {
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for i := 0; i < txInCount; i++ {
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ti := &txIn{}
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ti := &txIn{}
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@ -285,12 +286,14 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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}
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}
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tx.transparentInputs[i] = ti
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tx.transparentInputs[i] = ti
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}
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}
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}
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var txOutCount uint64
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var txOutCount uint64
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if ok := s.ReadCompactSize(&txOutCount); !ok {
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if ok := s.ReadCompactSize(&txOutCount); !ok {
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return nil, errors.New("could not read tx_out_count")
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return nil, errors.New("could not read tx_out_count")
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}
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}
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if txOutCount > 0 {
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tx.transparentOutputs = make([]*txOut, txOutCount)
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tx.transparentOutputs = make([]*txOut, txOutCount)
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for i := 0; i < txOutCount; i++ {
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for i := 0; i < txOutCount; i++ {
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to := &txOut{}
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to := &txOut{}
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@ -300,6 +303,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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}
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}
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tx.transparentOutputs[i] = to
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tx.transparentOutputs[i] = to
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}
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}
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}
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if ok := s.ReadUint32(&tx.nLockTime); !ok {
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if ok := s.ReadUint32(&tx.nLockTime); !ok {
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return nil, errors.New("could not read nLockTime")
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return nil, errors.New("could not read nLockTime")
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@ -321,6 +325,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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return nil, errors.New("could not read nShieldedSpend")
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return nil, errors.New("could not read nShieldedSpend")
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}
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}
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if spendCount > 0 {
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tx.shieldedSpends = make([]*spend, spendCount)
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tx.shieldedSpends = make([]*spend, spendCount)
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for i := 0; i < spendCount; i++ {
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for i := 0; i < spendCount; i++ {
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newSpend := &spend{}
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newSpend := &spend{}
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@ -330,12 +335,14 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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}
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}
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tx.shieldedSpends[i] = newSpend
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tx.shieldedSpends[i] = newSpend
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}
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}
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}
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var outputCount uint64
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var outputCount uint64
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if ok := s.ReadCompactSize(&outputCount); !ok {
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if ok := s.ReadCompactSize(&outputCount); !ok {
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return nil, errors.New("could not read nShieldedOutput")
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return nil, errors.New("could not read nShieldedOutput")
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}
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}
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if outputCount > 0 {
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tx.shieldedOutputs = make([]*output, outputCount)
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tx.shieldedOutputs = make([]*output, outputCount)
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for i := 0; i < outputCount; i++ {
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for i := 0; i < outputCount; i++ {
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newOutput := &output{}
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newOutput := &output{}
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@ -346,6 +353,7 @@ func (tx *transaction) ParseFromSlice(data []byte) ([]byte, error) {
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tx.shieldedOutputs[i] = newOutput
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tx.shieldedOutputs[i] = newOutput
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}
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}
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}
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}
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}
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if tx.version >= 2 {
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if tx.version >= 2 {
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var joinSplitCount uint64
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var joinSplitCount uint64
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