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405 lines
11 KiB
405 lines
11 KiB
// Copyright 2021 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 les
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import (
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"bytes"
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"encoding/binary"
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"io"
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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/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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l "github.com/ethereum/go-ethereum/les"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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)
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var (
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bankKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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bankAddr = crypto.PubkeyToAddress(bankKey.PublicKey)
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bankFunds = new(big.Int).Mul(big.NewInt(100), big.NewInt(params.Ether))
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testChainLen = 256
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testContractCode = common.Hex2Bytes("606060405260cc8060106000396000f360606040526000357c01000000000000000000000000000000000000000000000000000000009004806360cd2685146041578063c16431b914606b57603f565b005b6055600480803590602001909190505060a9565b6040518082815260200191505060405180910390f35b60886004808035906020019091908035906020019091905050608a565b005b80600060005083606481101560025790900160005b50819055505b5050565b6000600060005082606481101560025790900160005b5054905060c7565b91905056")
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chain *core.BlockChain
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addrHashes []common.Hash
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txHashes []common.Hash
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chtTrie *trie.Trie
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bloomTrie *trie.Trie
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chtKeys [][]byte
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bloomKeys [][]byte
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)
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func makechain() (bc *core.BlockChain, addrHashes, txHashes []common.Hash) {
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gspec := &core.Genesis{
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Config: params.TestChainConfig,
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Alloc: core.GenesisAlloc{bankAddr: {Balance: bankFunds}},
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GasLimit: 100000000,
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}
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signer := types.HomesteadSigner{}
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_, blocks, _ := core.GenerateChainWithGenesis(gspec, ethash.NewFaker(), testChainLen,
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func(i int, gen *core.BlockGen) {
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var (
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tx *types.Transaction
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addr common.Address
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)
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nonce := uint64(i)
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if i%4 == 0 {
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tx, _ = types.SignTx(types.NewContractCreation(nonce, big.NewInt(0), 200000, big.NewInt(0), testContractCode), signer, bankKey)
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addr = crypto.CreateAddress(bankAddr, nonce)
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} else {
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addr = common.BigToAddress(big.NewInt(int64(i)))
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tx, _ = types.SignTx(types.NewTransaction(nonce, addr, big.NewInt(10000), params.TxGas, big.NewInt(params.GWei), nil), signer, bankKey)
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}
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gen.AddTx(tx)
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addrHashes = append(addrHashes, crypto.Keccak256Hash(addr[:]))
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txHashes = append(txHashes, tx.Hash())
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})
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bc, _ = core.NewBlockChain(rawdb.NewMemoryDatabase(), nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
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if _, err := bc.InsertChain(blocks); err != nil {
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panic(err)
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}
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return
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}
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func makeTries() (chtTrie *trie.Trie, bloomTrie *trie.Trie, chtKeys, bloomKeys [][]byte) {
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chtTrie = trie.NewEmpty(trie.NewDatabase(rawdb.NewMemoryDatabase()))
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bloomTrie = trie.NewEmpty(trie.NewDatabase(rawdb.NewMemoryDatabase()))
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for i := 0; i < testChainLen; i++ {
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// The element in CHT is <big-endian block number> -> <block hash>
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key := make([]byte, 8)
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binary.BigEndian.PutUint64(key, uint64(i+1))
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chtTrie.Update(key, []byte{0x1, 0xf})
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chtKeys = append(chtKeys, key)
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// The element in Bloom trie is <2 byte bit index> + <big-endian block number> -> bloom
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key2 := make([]byte, 10)
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binary.BigEndian.PutUint64(key2[2:], uint64(i+1))
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bloomTrie.Update(key2, []byte{0x2, 0xe})
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bloomKeys = append(bloomKeys, key2)
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}
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return
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}
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func init() {
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chain, addrHashes, txHashes = makechain()
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chtTrie, bloomTrie, chtKeys, bloomKeys = makeTries()
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}
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type fuzzer struct {
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chain *core.BlockChain
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pool *core.TxPool
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chainLen int
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addr, txs []common.Hash
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nonce uint64
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chtKeys [][]byte
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bloomKeys [][]byte
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chtTrie *trie.Trie
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bloomTrie *trie.Trie
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input io.Reader
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exhausted bool
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}
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func newFuzzer(input []byte) *fuzzer {
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return &fuzzer{
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chain: chain,
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chainLen: testChainLen,
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addr: addrHashes,
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txs: txHashes,
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chtTrie: chtTrie,
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bloomTrie: bloomTrie,
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chtKeys: chtKeys,
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bloomKeys: bloomKeys,
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nonce: uint64(len(txHashes)),
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pool: core.NewTxPool(core.DefaultTxPoolConfig, params.TestChainConfig, chain),
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input: bytes.NewReader(input),
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}
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}
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func (f *fuzzer) read(size int) []byte {
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out := make([]byte, size)
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if _, err := f.input.Read(out); err != nil {
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f.exhausted = true
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}
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return out
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}
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func (f *fuzzer) randomByte() byte {
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d := f.read(1)
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return d[0]
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}
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func (f *fuzzer) randomBool() bool {
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d := f.read(1)
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return d[0]&1 == 1
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}
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func (f *fuzzer) randomInt(max int) int {
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if max == 0 {
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return 0
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}
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if max <= 256 {
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return int(f.randomByte()) % max
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}
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var a uint16
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if err := binary.Read(f.input, binary.LittleEndian, &a); err != nil {
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f.exhausted = true
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}
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return int(a % uint16(max))
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}
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func (f *fuzzer) randomX(max int) uint64 {
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var a uint16
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if err := binary.Read(f.input, binary.LittleEndian, &a); err != nil {
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f.exhausted = true
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}
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if a < 0x8000 {
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return uint64(a%uint16(max+1)) - 1
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}
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return (uint64(1)<<(a%64+1) - 1) & (uint64(a) * 343897772345826595)
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}
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func (f *fuzzer) randomBlockHash() common.Hash {
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h := f.chain.GetCanonicalHash(uint64(f.randomInt(3 * f.chainLen)))
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if h != (common.Hash{}) {
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return h
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}
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return common.BytesToHash(f.read(common.HashLength))
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}
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func (f *fuzzer) randomAddrHash() []byte {
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i := f.randomInt(3 * len(f.addr))
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if i < len(f.addr) {
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return f.addr[i].Bytes()
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}
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return f.read(common.HashLength)
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}
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func (f *fuzzer) randomCHTTrieKey() []byte {
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i := f.randomInt(3 * len(f.chtKeys))
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if i < len(f.chtKeys) {
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return f.chtKeys[i]
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}
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return f.read(8)
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}
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func (f *fuzzer) randomBloomTrieKey() []byte {
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i := f.randomInt(3 * len(f.bloomKeys))
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if i < len(f.bloomKeys) {
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return f.bloomKeys[i]
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}
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return f.read(10)
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}
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func (f *fuzzer) randomTxHash() common.Hash {
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i := f.randomInt(3 * len(f.txs))
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if i < len(f.txs) {
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return f.txs[i]
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}
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return common.BytesToHash(f.read(common.HashLength))
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}
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func (f *fuzzer) BlockChain() *core.BlockChain {
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return f.chain
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}
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func (f *fuzzer) TxPool() *core.TxPool {
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return f.pool
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}
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func (f *fuzzer) ArchiveMode() bool {
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return false
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}
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func (f *fuzzer) AddTxsSync() bool {
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return false
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}
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func (f *fuzzer) GetHelperTrie(typ uint, index uint64) *trie.Trie {
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if typ == 0 {
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return f.chtTrie
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} else if typ == 1 {
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return f.bloomTrie
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}
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return nil
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}
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type dummyMsg struct {
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data []byte
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}
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func (d dummyMsg) Decode(val interface{}) error {
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return rlp.DecodeBytes(d.data, val)
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}
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func (f *fuzzer) doFuzz(msgCode uint64, packet interface{}) {
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enc, err := rlp.EncodeToBytes(packet)
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if err != nil {
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panic(err)
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}
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version := f.randomInt(3) + 2 // [LES2, LES3, LES4]
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peer, closeFn := l.NewFuzzerPeer(version)
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defer closeFn()
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fn, _, _, err := l.Les3[msgCode].Handle(dummyMsg{enc})
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if err != nil {
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panic(err)
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}
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fn(f, peer, func() bool { return true })
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}
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func Fuzz(input []byte) int {
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// We expect some large inputs
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if len(input) < 100 {
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return -1
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}
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f := newFuzzer(input)
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if f.exhausted {
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return -1
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}
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for !f.exhausted {
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switch f.randomInt(8) {
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case 0:
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req := &l.GetBlockHeadersPacket{
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Query: l.GetBlockHeadersData{
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Amount: f.randomX(l.MaxHeaderFetch + 1),
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Skip: f.randomX(10),
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Reverse: f.randomBool(),
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},
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}
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if f.randomBool() {
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req.Query.Origin.Hash = f.randomBlockHash()
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} else {
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req.Query.Origin.Number = uint64(f.randomInt(f.chainLen * 2))
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}
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f.doFuzz(l.GetBlockHeadersMsg, req)
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case 1:
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req := &l.GetBlockBodiesPacket{Hashes: make([]common.Hash, f.randomInt(l.MaxBodyFetch+1))}
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for i := range req.Hashes {
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req.Hashes[i] = f.randomBlockHash()
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}
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f.doFuzz(l.GetBlockBodiesMsg, req)
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case 2:
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req := &l.GetCodePacket{Reqs: make([]l.CodeReq, f.randomInt(l.MaxCodeFetch+1))}
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for i := range req.Reqs {
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req.Reqs[i] = l.CodeReq{
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BHash: f.randomBlockHash(),
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AccKey: f.randomAddrHash(),
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}
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}
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f.doFuzz(l.GetCodeMsg, req)
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case 3:
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req := &l.GetReceiptsPacket{Hashes: make([]common.Hash, f.randomInt(l.MaxReceiptFetch+1))}
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for i := range req.Hashes {
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req.Hashes[i] = f.randomBlockHash()
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}
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f.doFuzz(l.GetReceiptsMsg, req)
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case 4:
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req := &l.GetProofsPacket{Reqs: make([]l.ProofReq, f.randomInt(l.MaxProofsFetch+1))}
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for i := range req.Reqs {
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if f.randomBool() {
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req.Reqs[i] = l.ProofReq{
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BHash: f.randomBlockHash(),
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AccKey: f.randomAddrHash(),
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Key: f.randomAddrHash(),
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FromLevel: uint(f.randomX(3)),
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}
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} else {
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req.Reqs[i] = l.ProofReq{
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BHash: f.randomBlockHash(),
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Key: f.randomAddrHash(),
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FromLevel: uint(f.randomX(3)),
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}
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}
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}
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f.doFuzz(l.GetProofsV2Msg, req)
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case 5:
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req := &l.GetHelperTrieProofsPacket{Reqs: make([]l.HelperTrieReq, f.randomInt(l.MaxHelperTrieProofsFetch+1))}
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for i := range req.Reqs {
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switch f.randomInt(3) {
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case 0:
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// Canonical hash trie
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req.Reqs[i] = l.HelperTrieReq{
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Type: 0,
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TrieIdx: f.randomX(3),
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Key: f.randomCHTTrieKey(),
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FromLevel: uint(f.randomX(3)),
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AuxReq: uint(2),
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}
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case 1:
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// Bloom trie
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req.Reqs[i] = l.HelperTrieReq{
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Type: 1,
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TrieIdx: f.randomX(3),
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Key: f.randomBloomTrieKey(),
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FromLevel: uint(f.randomX(3)),
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AuxReq: 0,
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}
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default:
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// Random trie
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req.Reqs[i] = l.HelperTrieReq{
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Type: 2,
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TrieIdx: f.randomX(3),
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Key: f.randomCHTTrieKey(),
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FromLevel: uint(f.randomX(3)),
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AuxReq: 0,
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}
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}
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}
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f.doFuzz(l.GetHelperTrieProofsMsg, req)
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case 6:
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req := &l.SendTxPacket{Txs: make([]*types.Transaction, f.randomInt(l.MaxTxSend+1))}
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signer := types.HomesteadSigner{}
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for i := range req.Txs {
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var nonce uint64
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if f.randomBool() {
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nonce = uint64(f.randomByte())
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} else {
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nonce = f.nonce
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f.nonce += 1
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}
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req.Txs[i], _ = types.SignTx(types.NewTransaction(nonce, common.Address{}, big.NewInt(10000), params.TxGas, big.NewInt(1000000000*int64(f.randomByte())), nil), signer, bankKey)
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}
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f.doFuzz(l.SendTxV2Msg, req)
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case 7:
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req := &l.GetTxStatusPacket{Hashes: make([]common.Hash, f.randomInt(l.MaxTxStatus+1))}
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for i := range req.Hashes {
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req.Hashes[i] = f.randomTxHash()
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}
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f.doFuzz(l.GetTxStatusMsg, req)
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}
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}
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return 0
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}
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