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tests/fuzzers/abi: add fuzzer for fuzzing package accounts/abi (ether…
…eum#21217) * tests/fuzzers/abi: added abi fuzzer * accounts/abi: fixed issues found by fuzzing * tests/fuzzers/abi: update fuzzers, added repro test * tests/fuzzers/abi: renamed abi_fuzzer to abifuzzer * tests/fuzzers/abi: updated abi fuzzer * tests/fuzzers/abi: updated abi fuzzer * accounts/abi: minor style fix * go.mod: added go-fuzz dependency * tests/fuzzers/abi: updated abi fuzzer * tests/fuzzers/abi: make linter happy * tests/fuzzers/abi: make linter happy * tests/fuzzers/abi: comment out false positives
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,186 @@ | ||
| // Copyright 2020 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 abi | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "math/rand" | ||
| "reflect" | ||
| "strings" | ||
|
|
||
| "github.com/ethereum/go-ethereum/accounts/abi" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
| fuzz "github.com/google/gofuzz" | ||
| ) | ||
|
|
||
| func unpackPack(abi abi.ABI, method string, inputType []interface{}, input []byte) bool { | ||
| outptr := reflect.New(reflect.TypeOf(inputType)) | ||
| if err := abi.Unpack(outptr.Interface(), method, input); err == nil { | ||
| output, err := abi.Pack(method, input) | ||
| if err != nil { | ||
| // We have some false positives as we can unpack these type successfully, but not pack them | ||
| if err.Error() == "abi: cannot use []uint8 as type [0]int8 as argument" || | ||
| err.Error() == "abi: cannot use uint8 as type int8 as argument" { | ||
| return false | ||
| } | ||
| panic(err) | ||
| } | ||
| if !bytes.Equal(input, output[4:]) { | ||
| panic(fmt.Sprintf("unpackPack is not equal, \ninput : %x\noutput: %x", input, output[4:])) | ||
| } | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func packUnpack(abi abi.ABI, method string, input []interface{}) bool { | ||
| if packed, err := abi.Pack(method, input); err == nil { | ||
| outptr := reflect.New(reflect.TypeOf(input)) | ||
| err := abi.Unpack(outptr.Interface(), method, packed) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| out := outptr.Elem().Interface() | ||
| if !reflect.DeepEqual(input, out) { | ||
| panic(fmt.Sprintf("unpackPack is not equal, \ninput : %x\noutput: %x", input, out)) | ||
| } | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| type args struct { | ||
| name string | ||
| typ string | ||
| } | ||
|
|
||
| func createABI(name string, stateMutability, payable *string, inputs []args) (abi.ABI, error) { | ||
| sig := fmt.Sprintf(`[{ "type" : "function", "name" : "%v" `, name) | ||
| if stateMutability != nil { | ||
| sig += fmt.Sprintf(`, "stateMutability": "%v" `, *stateMutability) | ||
| } | ||
| if payable != nil { | ||
| sig += fmt.Sprintf(`, "payable": %v `, *payable) | ||
| } | ||
| if len(inputs) > 0 { | ||
| sig += `, "inputs" : [ {` | ||
| for i, inp := range inputs { | ||
| sig += fmt.Sprintf(`"name" : "%v", "type" : "%v" `, inp.name, inp.typ) | ||
| if i+1 < len(inputs) { | ||
| sig += "," | ||
| } | ||
| } | ||
| sig += "} ]" | ||
| sig += `, "outputs" : [ {` | ||
| for i, inp := range inputs { | ||
| sig += fmt.Sprintf(`"name" : "%v", "type" : "%v" `, inp.name, inp.typ) | ||
| if i+1 < len(inputs) { | ||
| sig += "," | ||
| } | ||
| } | ||
| sig += "} ]" | ||
| } | ||
| sig += `}]` | ||
|
|
||
| return abi.JSON(strings.NewReader(sig)) | ||
| } | ||
|
|
||
| func fillStruct(structs []interface{}, data []byte) { | ||
| if structs != nil && len(data) != 0 { | ||
| fuzz.NewFromGoFuzz(data).Fuzz(&structs) | ||
| } | ||
| } | ||
|
|
||
| func createStructs(args []args) []interface{} { | ||
| structs := make([]interface{}, len(args)) | ||
| for i, arg := range args { | ||
| t, err := abi.NewType(arg.typ, "", nil) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| structs[i] = reflect.New(t.GetType()).Elem() | ||
| } | ||
| return structs | ||
| } | ||
|
|
||
| func runFuzzer(input []byte) int { | ||
| good := false | ||
|
|
||
| names := []string{"_name", "name", "NAME", "name_", "__", "_name_", "n"} | ||
| stateMut := []string{"", "pure", "view", "payable"} | ||
| stateMutabilites := []*string{nil, &stateMut[0], &stateMut[1], &stateMut[2], &stateMut[3]} | ||
| pays := []string{"true", "false"} | ||
| payables := []*string{nil, &pays[0], &pays[1]} | ||
| varNames := []string{"a", "b", "c", "d", "e", "f", "g"} | ||
| varNames = append(varNames, names...) | ||
| varTypes := []string{"bool", "address", "bytes", "string", | ||
| "uint8", "int8", "uint8", "int8", "uint16", "int16", | ||
| "uint24", "int24", "uint32", "int32", "uint40", "int40", "uint48", "int48", "uint56", "int56", | ||
| "uint64", "int64", "uint72", "int72", "uint80", "int80", "uint88", "int88", "uint96", "int96", | ||
| "uint104", "int104", "uint112", "int112", "uint120", "int120", "uint128", "int128", "uint136", "int136", | ||
| "uint144", "int144", "uint152", "int152", "uint160", "int160", "uint168", "int168", "uint176", "int176", | ||
| "uint184", "int184", "uint192", "int192", "uint200", "int200", "uint208", "int208", "uint216", "int216", | ||
| "uint224", "int224", "uint232", "int232", "uint240", "int240", "uint248", "int248", "uint256", "int256", | ||
| "bytes1", "bytes2", "bytes3", "bytes4", "bytes5", "bytes6", "bytes7", "bytes8", "bytes9", "bytes10", "bytes11", | ||
| "bytes12", "bytes13", "bytes14", "bytes15", "bytes16", "bytes17", "bytes18", "bytes19", "bytes20", "bytes21", | ||
| "bytes22", "bytes23", "bytes24", "bytes25", "bytes26", "bytes27", "bytes28", "bytes29", "bytes30", "bytes31", | ||
| "bytes32", "bytes"} | ||
| rnd := rand.New(rand.NewSource(123456)) | ||
| if len(input) > 0 { | ||
| kec := crypto.Keccak256(input) | ||
| rnd = rand.New(rand.NewSource(int64(kec[0]))) | ||
| } | ||
| name := names[rnd.Intn(len(names))] | ||
| stateM := stateMutabilites[rnd.Intn(len(stateMutabilites))] | ||
| payable := payables[rnd.Intn(len(payables))] | ||
| maxLen := 5 | ||
| for k := 1; k < maxLen; k++ { | ||
| var arg []args | ||
| for i := k; i > 0; i-- { | ||
| argName := varNames[i] | ||
| argTyp := varTypes[rnd.Int31n(int32(len(varTypes)))] | ||
| if rnd.Int31n(10) == 0 { | ||
| argTyp += "[]" | ||
| } else if rnd.Int31n(10) == 0 { | ||
| arrayArgs := rnd.Int31n(30) + 1 | ||
| argTyp += fmt.Sprintf("[%d]", arrayArgs) | ||
| } | ||
| arg = append(arg, args{ | ||
| name: argName, | ||
| typ: argTyp, | ||
| }) | ||
| } | ||
| abi, err := createABI(name, stateM, payable, arg) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| structs := createStructs(arg) | ||
| b := unpackPack(abi, name, structs, input) | ||
| fillStruct(structs, input) | ||
| c := packUnpack(abi, name, structs) | ||
| good = good || b || c | ||
| } | ||
| if good { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func Fuzz(input []byte) int { | ||
| return runFuzzer(input) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| // Copyright 2020 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 abi | ||
|
|
||
| import ( | ||
| "testing" | ||
| ) | ||
|
|
||
| // TestReplicate can be used to replicate crashers from the fuzzing tests. | ||
| // Just replace testString with the data in .quoted | ||
| func TestReplicate(t *testing.T) { | ||
| testString := "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" + | ||
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00 \x00\x00\x00\x00\x00\x00\x00\x00" + | ||
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" + | ||
| "\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00000000000" + | ||
| "00000000000000000000" + | ||
| "00000000000000000000" + | ||
| "00000001" | ||
|
|
||
| data := []byte(testString) | ||
| runFuzzer(data) | ||
| } | ||
|
|
||
| // TestGenerateCorpus can be used to add corpus for the fuzzer. | ||
| // Just replace corpusHex with the hexEncoded output you want to add to the fuzzer. | ||
| func TestGenerateCorpus(t *testing.T) { | ||
| /* | ||
| corpusHex := "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff" | ||
| data := common.FromHex(corpusHex) | ||
| checksum := sha1.Sum(data) | ||
| outf := fmt.Sprintf("corpus/%x", checksum) | ||
| if err := ioutil.WriteFile(outf, data, 0777); err != nil { | ||
| panic(err) | ||
| } | ||
| */ | ||
| } |