mirror of https://github.com/status-im/nim-eth.git
69 lines
2.2 KiB
Nim
69 lines
2.2 KiB
Nim
import
|
|
streams, posix, sequtils, strutils, chronicles, chronos, stew/byteutils,
|
|
eth/p2p/[discovery, kademlia, enode], eth/[keys, rlp],
|
|
../../p2p/p2p_test_helper
|
|
|
|
template fuzz(body) =
|
|
# For code we want to fuzz.
|
|
try:
|
|
body
|
|
except:
|
|
let e = getCurrentException()
|
|
debug "Fuzzer input created exception", exception=e.name, trace=e.repr
|
|
discard kill(getpid(), SIGSEGV)
|
|
|
|
template noFuzz(body) =
|
|
# For code not in the scope of the test.
|
|
# Lets not have false negatives due to possible issues in this code.
|
|
try:
|
|
body
|
|
except:
|
|
let e = getCurrentException()
|
|
debug "Exception out of scope of the fuzzing target",
|
|
exception=e.name, trace=e.repr
|
|
return
|
|
|
|
const DefaultListeningPort = 30303
|
|
|
|
proc fuzzTest() =
|
|
var
|
|
msg: seq[byte]
|
|
address: Address
|
|
targetNode: DiscoveryProtocol
|
|
|
|
noFuzz:
|
|
# Set up a discovery node, this is the node we target with fuzzing
|
|
let
|
|
targetNodeKey = initPrivateKey("a2b50376a79b1a8c8a3296485572bdfbf54708bb46d3c25d73d2723aaaf6a617")
|
|
targetNodeAddr = localAddress(DefaultListeningPort)
|
|
targetNode = newDiscoveryProtocol(targetNodeKey, targetNodeAddr, @[])
|
|
# Create the transport as else replies on the messages send will fail.
|
|
targetNode.open()
|
|
|
|
# Read input from stdin (fastest for AFL)
|
|
let s = newFileStream(stdin)
|
|
# We use binary files as with hex we can get lots of "not hex" failures
|
|
var input = s.readAll()
|
|
s.close()
|
|
# Remove newline if it is there
|
|
input.removeSuffix
|
|
# TODO: is there a better/faster way?
|
|
let payload = input.mapIt(it.byte)
|
|
|
|
# Sending raw payload is possible but won't find us much. We need a hash and
|
|
# a signature, and without it there is a big chance it will always result in
|
|
# "Wrong msg mac from" error.
|
|
let nodeKey = initPrivateKey("a2b50376a79b1a8c8a3296485572bdfbf54708bb46d3c25d73d2723aaaf6a618")
|
|
msg = packData(payload, nodeKey)
|
|
address = localAddress(DefaultListeningPort + 1)
|
|
|
|
try:
|
|
targetNode.receive(address, msg)
|
|
# These errors are also catched in `processClient` in discovery.nim
|
|
# TODO: move them a layer down in discovery so we can do a cleaner test there?
|
|
except RlpError, DiscProtocolError:
|
|
debug "Receive failed", err = getCurrentExceptionMsg()
|
|
|
|
fuzz:
|
|
fuzzTest()
|