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common/hexutil: don't leak encoding/hex errors in Decode 

All other functions return errors from package hexutil, ensure that
Decode does too.
This commit is contained in:
Felix Lange 2017-02-22 17:55:04 +01:00
parent f3b7dcc5bd
commit 357d00cdb1
2 changed files with 9 additions and 6 deletions
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6
common/hexutil/hexutil.go
View File

@ -60,7 +60,11 @@ func Decode(input string) ([]byte, error) {
if !has0xPrefix(input) {
return nil, ErrMissingPrefix
}
return hex.DecodeString(input[2:])
b, err := hex.DecodeString(input[2:])
if err != nil {
err = mapError(err)
}
return b, err
}
// MustDecode decodes a hex string with 0x prefix. It panics for invalid input.

9
common/hexutil/hexutil_test.go
View File

@ -18,7 +18,6 @@ package hexutil
import (
"bytes"
"encoding/hex"
"math/big"
"testing"
)
@ -60,10 +59,10 @@ var (
// invalid
{input: ``, wantErr: ErrEmptyString},
{input: `0`, wantErr: ErrMissingPrefix},
{input: `0x0`, wantErr: hex.ErrLength},
{input: `0x023`, wantErr: hex.ErrLength},
{input: `0xxx`, wantErr: hex.InvalidByteError('x')},
{input: `0x01zz01`, wantErr: hex.InvalidByteError('z')},
{input: `0x0`, wantErr: ErrOddLength},
{input: `0x023`, wantErr: ErrOddLength},
{input: `0xxx`, wantErr: ErrSyntax},
{input: `0x01zz01`, wantErr: ErrSyntax},
// valid
{input: `0x`, want: []byte{}},
{input: `0X`, want: []byte{}},