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