core/vm: use golang native big.Int (#26834)
reverts #26021, to use the upstream bigint instead.
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@ -29,7 +29,6 @@ import (
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"github.com/ethereum/go-ethereum/crypto/bls12381"
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"github.com/ethereum/go-ethereum/crypto/bn256"
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"github.com/ethereum/go-ethereum/params"
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big2 "github.com/holiman/big"
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"golang.org/x/crypto/ripemd160"
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)
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@ -378,9 +377,9 @@ func (c *bigModExp) Run(input []byte) ([]byte, error) {
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}
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// Retrieve the operands and execute the exponentiation
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var (
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base = new(big2.Int).SetBytes(getData(input, 0, baseLen))
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exp = new(big2.Int).SetBytes(getData(input, baseLen, expLen))
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mod = new(big2.Int).SetBytes(getData(input, baseLen+expLen, modLen))
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base = new(big.Int).SetBytes(getData(input, 0, baseLen))
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exp = new(big.Int).SetBytes(getData(input, baseLen, expLen))
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mod = new(big.Int).SetBytes(getData(input, baseLen+expLen, modLen))
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v []byte
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)
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switch {
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3
go.mod
3
go.mod
@ -35,7 +35,6 @@ require (
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github.com/gorilla/websocket v1.4.2
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github.com/graph-gophers/graphql-go v1.3.0
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github.com/hashicorp/go-bexpr v0.1.10
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github.com/holiman/big v0.0.0-20221017200358-a027dc42d04e
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github.com/holiman/bloomfilter/v2 v2.0.3
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github.com/holiman/uint256 v1.2.0
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github.com/huin/goupnp v1.0.3
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@ -45,6 +44,7 @@ require (
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github.com/jedisct1/go-minisign v0.0.0-20190909160543-45766022959e
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github.com/julienschmidt/httprouter v1.3.0
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github.com/karalabe/usb v0.0.2
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github.com/kylelemons/godebug v1.1.0
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github.com/mattn/go-colorable v0.1.13
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github.com/mattn/go-isatty v0.0.16
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github.com/naoina/toml v0.1.2-0.20170918210437-9fafd6967416
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@ -98,7 +98,6 @@ require (
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github.com/klauspost/compress v1.15.15 // indirect
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github.com/kr/pretty v0.3.1 // indirect
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github.com/kr/text v0.2.0 // indirect
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github.com/kylelemons/godebug v1.1.0 // indirect
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github.com/mattn/go-runewidth v0.0.9 // indirect
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github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
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github.com/mitchellh/mapstructure v1.4.1 // indirect
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2
go.sum
2
go.sum
@ -293,8 +293,6 @@ github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09
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github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
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github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
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github.com/holiman/big v0.0.0-20221017200358-a027dc42d04e h1:pIYdhNkDh+YENVNi3gto8n9hAmRxKxoar0iE6BLucjw=
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github.com/holiman/big v0.0.0-20221017200358-a027dc42d04e/go.mod h1:j9cQbcqHQujT0oKJ38PylVfqohClLr3CvDC+Qcg+lhU=
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github.com/holiman/bloomfilter/v2 v2.0.3 h1:73e0e/V0tCydx14a0SCYS/EWCxgwLZ18CZcZKVu0fao=
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github.com/holiman/bloomfilter/v2 v2.0.3/go.mod h1:zpoh+gs7qcpqrHr3dB55AMiJwo0iURXE7ZOP9L9hSkA=
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github.com/holiman/uint256 v1.2.0 h1:gpSYcPLWGv4sG43I2mVLiDZCNDh/EpGjSk8tmtxitHM=
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@ -125,7 +125,5 @@ compile_fuzzer tests/fuzzers/snap FuzzSRange fuzz_storage_range
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compile_fuzzer tests/fuzzers/snap FuzzByteCodes fuzz_byte_codes
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compile_fuzzer tests/fuzzers/snap FuzzTrieNodes fuzz_trie_nodes
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compile_fuzzer tests/fuzzers/modexp Fuzz fuzzModexp
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#TODO: move this to tests/fuzzers, if possible
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compile_fuzzer crypto/blake2b Fuzz fuzzBlake2b
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@ -1,40 +0,0 @@
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// Copyright 2020 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 main
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import (
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"fmt"
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"os"
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"github.com/ethereum/go-ethereum/tests/fuzzers/modexp"
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)
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func main() {
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if len(os.Args) != 2 {
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fmt.Fprintf(os.Stderr, "Usage: debug <file>\n")
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fmt.Fprintf(os.Stderr, "Example\n")
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fmt.Fprintf(os.Stderr, " $ debug ../crashers/4bbef6857c733a87ecf6fd8b9e7238f65eb9862a\n")
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os.Exit(1)
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}
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crasher := os.Args[1]
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data, err := os.ReadFile(crasher)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error loading crasher %v: %v", crasher, err)
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os.Exit(1)
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}
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modexp.Fuzz(data)
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}
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@ -1,90 +0,0 @@
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// Copyright 2022 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 modexp
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import (
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/vm"
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big2 "github.com/holiman/big"
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)
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// Fuzz is the fuzzing entry-point.
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// The function must return
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//
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// - 1 if the fuzzer should increase priority of the
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// given input during subsequent fuzzing (for example, the input is lexically
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// correct and was parsed successfully);
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// - -1 if the input must not be added to corpus even if gives new coverage; and
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// - 0 otherwise
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//
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// other values are reserved for future use.
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func Fuzz(input []byte) int {
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if len(input) <= 96 {
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return -1
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}
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// Abort on too expensive inputs
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precomp := vm.PrecompiledContractsBerlin[common.BytesToAddress([]byte{5})]
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if gas := precomp.RequiredGas(input); gas > 40_000_000 {
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return 0
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}
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var (
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baseLen = new(big.Int).SetBytes(getData(input, 0, 32)).Uint64()
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expLen = new(big.Int).SetBytes(getData(input, 32, 32)).Uint64()
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modLen = new(big.Int).SetBytes(getData(input, 64, 32)).Uint64()
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)
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// Handle a special case when both the base and mod length is zero
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if baseLen == 0 && modLen == 0 {
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return -1
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}
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input = input[96:]
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// Retrieve the operands and execute the exponentiation
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var (
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base = new(big.Int).SetBytes(getData(input, 0, baseLen))
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exp = new(big.Int).SetBytes(getData(input, baseLen, expLen))
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mod = new(big.Int).SetBytes(getData(input, baseLen+expLen, modLen))
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base2 = new(big2.Int).SetBytes(getData(input, 0, baseLen))
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exp2 = new(big2.Int).SetBytes(getData(input, baseLen, expLen))
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mod2 = new(big2.Int).SetBytes(getData(input, baseLen+expLen, modLen))
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)
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if mod.BitLen() == 0 {
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// Modulo 0 is undefined, return zero
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return -1
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}
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var a = new(big2.Int).Exp(base2, exp2, mod2).String()
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var b = new(big.Int).Exp(base, exp, mod).String()
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if a != b {
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panic(fmt.Sprintf("Inequality %#x ^ %#x mod %#x \n have %s\n want %s", base, exp, mod, a, b))
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}
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return 1
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}
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// getData returns a slice from the data based on the start and size and pads
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// up to size with zero's. This function is overflow safe.
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func getData(data []byte, start uint64, size uint64) []byte {
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length := uint64(len(data))
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if start > length {
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start = length
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}
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end := start + size
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if end > length {
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end = length
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}
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return common.RightPadBytes(data[start:end], int(size))
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}
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