98 lines
2.8 KiB
Nim
98 lines
2.8 KiB
Nim
## Nim-LibP2P
|
|
## Copyright (c) 2019 Status Research & Development GmbH
|
|
## Licensed under either of
|
|
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
|
|
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
|
|
## at your option.
|
|
## This file may not be copied, modified, or distributed except according to
|
|
## those terms.
|
|
|
|
{.push raises: [Defect].}
|
|
|
|
import hashes
|
|
import chronicles, metrics, stew/[byteutils, endians2]
|
|
import ./messages,
|
|
./protobuf,
|
|
../../../peerid,
|
|
../../../peerinfo,
|
|
../../../crypto/crypto,
|
|
../../../protobuf/minprotobuf,
|
|
../../../protocols/pubsub/errors
|
|
|
|
export errors, messages
|
|
|
|
logScope:
|
|
topics = "pubsubmessage"
|
|
|
|
const PubSubPrefix = toBytes("libp2p-pubsub:")
|
|
|
|
declareCounter(libp2p_pubsub_sig_verify_success, "pubsub successfully validated messages")
|
|
declareCounter(libp2p_pubsub_sig_verify_failure, "pubsub failed validated messages")
|
|
|
|
func defaultMsgIdProvider*(m: Message): Result[MessageID, ValidationResult] =
|
|
if m.seqno.len > 0 and m.fromPeer.data.len > 0:
|
|
let mid = byteutils.toHex(m.seqno) & $m.fromPeer
|
|
ok mid.toBytes()
|
|
else:
|
|
err ValidationResult.Reject
|
|
|
|
proc sign*(msg: Message, privateKey: PrivateKey): CryptoResult[seq[byte]] =
|
|
ok((? privateKey.sign(PubSubPrefix & encodeMessage(msg, false))).getBytes())
|
|
|
|
proc verify*(m: Message): bool =
|
|
if m.signature.len > 0 and m.key.len > 0:
|
|
var msg = m
|
|
msg.signature = @[]
|
|
msg.key = @[]
|
|
|
|
var remote: Signature
|
|
var key: PublicKey
|
|
if remote.init(m.signature) and key.init(m.key):
|
|
trace "verifying signature", remoteSignature = remote
|
|
result = remote.verify(PubSubPrefix & encodeMessage(msg, false), key)
|
|
|
|
if result:
|
|
libp2p_pubsub_sig_verify_success.inc()
|
|
else:
|
|
libp2p_pubsub_sig_verify_failure.inc()
|
|
|
|
proc init*(
|
|
T: type Message,
|
|
peer: Option[PeerInfo],
|
|
data: seq[byte],
|
|
topic: string,
|
|
seqno: Option[uint64],
|
|
sign: bool = true): Message
|
|
{.gcsafe, raises: [Defect, LPError].} =
|
|
var msg = Message(data: data, topicIDs: @[topic])
|
|
|
|
# order matters, we want to include seqno in the signature
|
|
if seqno.isSome:
|
|
msg.seqno = @(seqno.get().toBytesBE())
|
|
|
|
if peer.isSome:
|
|
let peer = peer.get()
|
|
msg.fromPeer = peer.peerId
|
|
if sign:
|
|
msg.signature = sign(msg, peer.privateKey).expect("Couldn't sign message!")
|
|
msg.key = peer.privateKey.getPublicKey().expect("Invalid private key!")
|
|
.getBytes().expect("Couldn't get public key bytes!")
|
|
elif sign:
|
|
raise (ref LPError)(msg: "Cannot sign message without peer info")
|
|
|
|
msg
|
|
|
|
proc init*(
|
|
T: type Message,
|
|
peerId: PeerId,
|
|
data: seq[byte],
|
|
topic: string,
|
|
seqno: Option[uint64]): Message
|
|
{.gcsafe, raises: [Defect, LPError].} =
|
|
var msg = Message(data: data, topicIDs: @[topic])
|
|
msg.fromPeer = peerId
|
|
|
|
if seqno.isSome:
|
|
msg.seqno = @(seqno.get().toBytesBE())
|
|
msg
|