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- // Copyright 2019 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package fourbyte
- import (
- "math/big"
- "reflect"
- "strings"
- "testing"
- "github.com/ethereum/go-ethereum/accounts/abi"
- "github.com/ethereum/go-ethereum/common"
- )
- func verify(t *testing.T, jsondata, calldata string, exp []interface{}) {
- abispec, err := abi.JSON(strings.NewReader(jsondata))
- if err != nil {
- t.Fatal(err)
- }
- cd := common.Hex2Bytes(calldata)
- sigdata, argdata := cd[:4], cd[4:]
- method, err := abispec.MethodById(sigdata)
- if err != nil {
- t.Fatal(err)
- }
- data, err := method.Inputs.UnpackValues(argdata)
- if err != nil {
- t.Fatal(err)
- }
- if len(data) != len(exp) {
- t.Fatalf("Mismatched length, expected %d, got %d", len(exp), len(data))
- }
- for i, elem := range data {
- if !reflect.DeepEqual(elem, exp[i]) {
- t.Fatalf("Unpack error, arg %d, got %v, want %v", i, elem, exp[i])
- }
- }
- }
- func TestNewUnpacker(t *testing.T) {
- type unpackTest struct {
- jsondata string
- calldata string
- exp []interface{}
- }
- testcases := []unpackTest{
- { // https://solidity.readthedocs.io/en/develop/abi-spec.html#use-of-dynamic-types
- `[{"type":"function","name":"f", "inputs":[{"type":"uint256"},{"type":"uint32[]"},{"type":"bytes10"},{"type":"bytes"}]}]`,
- // 0x123, [0x456, 0x789], "1234567890", "Hello, world!"
- "8be65246" + "00000000000000000000000000000000000000000000000000000000000001230000000000000000000000000000000000000000000000000000000000000080313233343536373839300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000004560000000000000000000000000000000000000000000000000000000000000789000000000000000000000000000000000000000000000000000000000000000d48656c6c6f2c20776f726c642100000000000000000000000000000000000000",
- []interface{}{
- big.NewInt(0x123),
- []uint32{0x456, 0x789},
- [10]byte{49, 50, 51, 52, 53, 54, 55, 56, 57, 48},
- common.Hex2Bytes("48656c6c6f2c20776f726c6421"),
- },
- }, { // https://docs.soliditylang.org/en/develop/abi-spec.html#examples
- `[{"type":"function","name":"sam","inputs":[{"type":"bytes"},{"type":"bool"},{"type":"uint256[]"}]}]`,
- // "dave", true and [1,2,3]
- "a5643bf20000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000464617665000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003",
- []interface{}{
- []byte{0x64, 0x61, 0x76, 0x65},
- true,
- []*big.Int{big.NewInt(1), big.NewInt(2), big.NewInt(3)},
- },
- }, {
- `[{"type":"function","name":"send","inputs":[{"type":"uint256"}]}]`,
- "a52c101e0000000000000000000000000000000000000000000000000000000000000012",
- []interface{}{big.NewInt(0x12)},
- }, {
- `[{"type":"function","name":"compareAndApprove","inputs":[{"type":"address"},{"type":"uint256"},{"type":"uint256"}]}]`,
- "751e107900000000000000000000000000000133700000deadbeef00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
- []interface{}{
- common.HexToAddress("0x00000133700000deadbeef000000000000000000"),
- new(big.Int).SetBytes([]byte{0x00}),
- big.NewInt(0x1),
- },
- },
- }
- for _, c := range testcases {
- verify(t, c.jsondata, c.calldata, c.exp)
- }
- }
- func TestCalldataDecoding(t *testing.T) {
- // send(uint256) : a52c101e
- // compareAndApprove(address,uint256,uint256) : 751e1079
- // issue(address[],uint256) : 42958b54
- jsondata := `
- [
- {"type":"function","name":"send","inputs":[{"name":"a","type":"uint256"}]},
- {"type":"function","name":"compareAndApprove","inputs":[{"name":"a","type":"address"},{"name":"a","type":"uint256"},{"name":"a","type":"uint256"}]},
- {"type":"function","name":"issue","inputs":[{"name":"a","type":"address[]"},{"name":"a","type":"uint256"}]},
- {"type":"function","name":"sam","inputs":[{"name":"a","type":"bytes"},{"name":"a","type":"bool"},{"name":"a","type":"uint256[]"}]}
- ]`
- // Expected failures
- for i, hexdata := range []string{
- "a52c101e00000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000042",
- "a52c101e000000000000000000000000000000000000000000000000000000000000001200",
- "a52c101e00000000000000000000000000000000000000000000000000000000000000",
- "a52c101e",
- "a52c10",
- "",
- // Too short
- "751e10790000000000000000000000000000000000000000000000000000000000000012",
- "751e1079FFffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
- // Not valid multiple of 32
- "deadbeef00000000000000000000000000000000000000000000000000000000000000",
- // Too short 'issue'
- "42958b5400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000042",
- // Too short compareAndApprove
- "a52c101e00ff0000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000042",
- // From https://docs.soliditylang.org/en/develop/abi-spec.html
- // contains a bool with illegal values
- "a5643bf20000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000001100000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000464617665000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003",
- } {
- _, err := parseCallData(common.Hex2Bytes(hexdata), jsondata)
- if err == nil {
- t.Errorf("test %d: expected decoding to fail: %s", i, hexdata)
- }
- }
- // Expected success
- for i, hexdata := range []string{
- // From https://docs.soliditylang.org/en/develop/abi-spec.html
- "a5643bf20000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000464617665000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003",
- "a52c101e0000000000000000000000000000000000000000000000000000000000000012",
- "a52c101eFFffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
- "751e1079000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
- "42958b54" +
- // start of dynamic type
- "0000000000000000000000000000000000000000000000000000000000000040" +
- // uint256
- "0000000000000000000000000000000000000000000000000000000000000001" +
- // length of array
- "0000000000000000000000000000000000000000000000000000000000000002" +
- // array values
- "000000000000000000000000000000000000000000000000000000000000dead" +
- "000000000000000000000000000000000000000000000000000000000000beef",
- } {
- _, err := parseCallData(common.Hex2Bytes(hexdata), jsondata)
- if err != nil {
- t.Errorf("test %d: unexpected failure on input %s:\n %v (%d bytes) ", i, hexdata, err, len(common.Hex2Bytes(hexdata)))
- }
- }
- }
- func TestMaliciousABIStrings(t *testing.T) {
- tests := []string{
- "func(uint256,uint256,[]uint256)",
- "func(uint256,uint256,uint256,)",
- "func(,uint256,uint256,uint256)",
- }
- data := common.Hex2Bytes("4401a6e40000000000000000000000000000000000000000000000000000000000000012")
- for i, tt := range tests {
- _, err := verifySelector(tt, data)
- if err == nil {
- t.Errorf("test %d: expected error for selector '%v'", i, tt)
- }
- }
- }
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