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nip19: fail to decode entities with wrong length.

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This commit is contained in:
fiatjaf
2024-09-16 17:35:23 -03:00
parent 515f76bd86
commit 1e4e91f257
2 changed files with 19 additions and 14 deletions
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27
nip19/nip19.go
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@@ -18,13 +18,13 @@ func Decode(bech32string string) (prefix string, value any, err error) {
data, err := bech32.ConvertBits(bits5, 5, 8, false)
if err != nil {
return prefix, nil, fmt.Errorf("failed translating data into 8 bits: %s", err.Error())
return prefix, nil, fmt.Errorf("failed to translate data into 8 bits: %s", err.Error())
}
switch prefix {
case "npub", "nsec", "note":
if len(data) < 32 {
return prefix, nil, fmt.Errorf("data is less than 32 bytes (%d)", len(data))
if len(data) != 32 {
return prefix, nil, fmt.Errorf("data should be 32 bytes (%d)", len(data))
}
return prefix, hex.EncodeToString(data[0:32]), nil
@@ -44,8 +44,8 @@ func Decode(bech32string string) (prefix string, value any, err error) {
switch t {
case TLVDefault:
if len(v) < 32 {
return prefix, nil, fmt.Errorf("pubkey is less than 32 bytes (%d)", len(v))
if len(v) != 32 {
return prefix, nil, fmt.Errorf("pubkey should be 32 bytes (%d)", len(v))
}
result.PublicKey = hex.EncodeToString(v)
case TLVRelay:
@@ -72,23 +72,22 @@ func Decode(bech32string string) (prefix string, value any, err error) {
switch t {
case TLVDefault:
if len(v) < 32 {
return prefix, nil, fmt.Errorf("id is less than 32 bytes (%d)", len(v))
if len(v) != 32 {
return prefix, nil, fmt.Errorf("id should be 32 bytes (%d)", len(v))
}
result.ID = hex.EncodeToString(v)
case TLVRelay:
result.Relays = append(result.Relays, string(v))
case TLVAuthor:
if len(v) < 32 {
return prefix, nil, fmt.Errorf("author is less than 32 bytes (%d)", len(v))
if len(v) != 32 {
return prefix, nil, fmt.Errorf("author should be 32 bytes (%d)", len(v))
}
result.Author = hex.EncodeToString(v)
case TLVKind:
if len(v) == 4 {
result.Kind = int(binary.BigEndian.Uint32(v))
} else {
if len(v) != 4 {
return prefix, nil, fmt.Errorf("invalid uint32 value for integer (%v)", v)
}
result.Kind = int(binary.BigEndian.Uint32(v))
default:
// ignore
}
@@ -115,8 +114,8 @@ func Decode(bech32string string) (prefix string, value any, err error) {
case TLVRelay:
result.Relays = append(result.Relays, string(v))
case TLVAuthor:
if len(v) < 32 {
return prefix, nil, fmt.Errorf("author is less than 32 bytes (%d)", len(v))
if len(v) != 32 {
return prefix, nil, fmt.Errorf("author should be 32 bytes (%d)", len(v))
}
result.PublicKey = hex.EncodeToString(v)
case TLVKind: