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rlp: stop accepting lists for byte slices and byte arrays

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This commit is contained in:
Felix Lange 2015-04-17 02:01:38 +02:00
parent 574d5d6ae6
commit 4d5a518a0b
2 changed files with 10 additions and 45 deletions
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14
rlp/decode.go
View File

@ -58,9 +58,8 @@ type Decoder interface {
// }
//
// To decode into a slice, the input must be a list and the resulting
// slice will contain the input elements in order.
// As a special case, if the slice has a byte-size element type, the input
// can also be an RLP string.
// slice will contain the input elements in order. For byte slices,
// the input must be an RLP string.
//
// To decode into a Go string, the input must be an RLP string. The
// input bytes are taken as-is and will not necessarily be valid UTF-8.
@ -309,13 +308,6 @@ func decodeListArray(s *Stream, val reflect.Value, elemdec decoder) error {
}
func decodeByteSlice(s *Stream, val reflect.Value) error {
kind, _, err := s.Kind()
if err != nil {
return err
}
if kind == List {
return decodeListSlice(s, val, decodeUint)
}
b, err := s.Bytes()
if err != nil {
return wrapStreamError(err, val.Type())
@ -351,7 +343,7 @@ func decodeByteArray(s *Stream, val reflect.Value) error {
return wrapStreamError(ErrCanonSize, val.Type())
}
case List:
return decodeListArray(s, val, decodeUint)
return wrapStreamError(ErrExpectedString, val.Type())
}
return nil
}

41
rlp/decode_test.go
View File

@ -323,56 +323,29 @@ var decodeTests = []decodeTest{
// byte slices
{input: "01", ptr: new([]byte), value: []byte{1}},
{input: "80", ptr: new([]byte), value: []byte{}},
{input: "8D6162636465666768696A6B6C6D", ptr: new([]byte), value: []byte("abcdefghijklm")},
{input: "C0", ptr: new([]byte), value: []byte{}},
{input: "C3010203", ptr: new([]byte), value: []byte{1, 2, 3}},
{
input: "8105",
ptr: new([]byte),
error: "rlp: non-canonical size information for []uint8",
},
{
input: "C3820102",
ptr: new([]byte),
error: "rlp: input string too long for uint8, decoding into ([]uint8)[0]",
},
{input: "C0", ptr: new([]byte), error: "rlp: expected input string or byte for []uint8"},
{input: "8105", ptr: new([]byte), error: "rlp: non-canonical size information for []uint8"},
// byte arrays
{input: "01", ptr: new([5]byte), value: [5]byte{1}},
{input: "80", ptr: new([5]byte), value: [5]byte{}},
{input: "850102030405", ptr: new([5]byte), value: [5]byte{1, 2, 3, 4, 5}},
{input: "C0", ptr: new([5]byte), value: [5]byte{}},
{input: "C3010203", ptr: new([5]byte), value: [5]byte{1, 2, 3, 0, 0}},
{
input: "C3820102",
ptr: new([5]byte),
error: "rlp: input string too long for uint8, decoding into ([5]uint8)[0]",
},
{
input: "86010203040506",
ptr: new([5]byte),
error: "rlp: input string too long for [5]uint8",
},
{
input: "8105",
ptr: new([5]byte),
error: "rlp: non-canonical size information for [5]uint8",
},
// byte array errors
{input: "C0", ptr: new([5]byte), error: "rlp: expected input string or byte for [5]uint8"},
{input: "C3010203", ptr: new([5]byte), error: "rlp: expected input string or byte for [5]uint8"},
{input: "86010203040506", ptr: new([5]byte), error: "rlp: input string too long for [5]uint8"},
{input: "8105", ptr: new([5]byte), error: "rlp: non-canonical size information for [5]uint8"},
// byte array reuse (should be zeroed)
{input: "850102030405", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 4, 5}},
{input: "01", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: String
{input: "850102030405", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 4, 5}},
{input: "01", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: Byte
{input: "C3010203", ptr: &sharedByteArray, value: [5]byte{1, 2, 3, 0, 0}},
{input: "C101", ptr: &sharedByteArray, value: [5]byte{1}}, // kind: List
// zero sized byte arrays
{input: "80", ptr: new([0]byte), value: [0]byte{}},
{input: "C0", ptr: new([0]byte), value: [0]byte{}},
{input: "01", ptr: new([0]byte), error: "rlp: input string too long for [0]uint8"},
{input: "8101", ptr: new([0]byte), error: "rlp: input string too long for [0]uint8"},