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invoice: sanity check empty fallback addr field

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This commit allows parseFallbackAddr to return an error when parsing an
empty fallback address field, rather than crash.
This commit is contained in:
Wilmer Paulino 2018-01-09 01:01:24 -05:00
parent 00d530bd91
commit db7154a401
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GPG Key ID: 6DF57B9F9514972F
1 changed files with 6 additions and 0 deletions
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6
zpay32/invoice.go
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@ -797,7 +797,13 @@ func parseMinFinalCLTVExpiry(data []byte) (*uint64, error) {
// parseFallbackAddr converts the data (encoded in base32) into a fallback // parseFallbackAddr converts the data (encoded in base32) into a fallback
// on-chain address. // on-chain address.
func parseFallbackAddr(data []byte, net *chaincfg.Params) (btcutil.Address, error) { func parseFallbackAddr(data []byte, net *chaincfg.Params) (btcutil.Address, error) {
// Checks if the data is empty or contains a version without an address.
if len(data) < 2 {
return nil, fmt.Errorf("empty fallback address field")
}
var addr btcutil.Address var addr btcutil.Address
version := data[0] version := data[0]
switch version { switch version {
case 0: case 0: