properly (re)factor consolidation signature checking (#6334)

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tersec 2024-06-09 17:37:41 +00:00 committed by GitHub
parent 0512d02766
commit e3d4ad5d39
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
4 changed files with 25 additions and 18 deletions

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@ -1956,7 +1956,6 @@ proc startExchangeTransitionConfigurationLoop(
while true:
# https://github.com/ethereum/execution-apis/blob/v1.0.0-beta.3/src/engine/paris.md#specification-3
debug "Exchange transition configuration tick"
await m.exchangeTransitionConfiguration()
await sleepAsync(60.seconds)

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@ -421,3 +421,23 @@ proc verify_bls_to_execution_change_signature*(
let signing_root = compute_bls_to_execution_change_signing_root(
genesisFork, genesis_validators_root, msg.message)
blsVerify(pubkey, signing_root.data, signature)
func compute_consolidation_signing_root(
genesisFork: Fork, genesis_validators_root: Eth2Digest,
msg: Consolidation): Eth2Digest =
# Uses genesis fork version regardless
doAssert genesisFork.current_version == genesisFork.previous_version
let domain = compute_domain(
DOMAIN_CONSOLIDATION, genesisFork.current_version,
genesis_validators_root=genesis_validators_root)
compute_signing_root(msg, domain)
proc verify_consolidation_signature*(
genesisFork: Fork, genesis_validators_root: Eth2Digest,
msg: SignedConsolidation | TrustedSignedConsolidation,
pubkeys: openArray[ValidatorPubKey]): bool =
withTrust(msg.signature):
let signing_root = compute_consolidation_signing_root(
genesisFork, genesis_validators_root, msg.message)
blsFastAggregateVerify(pubkeys, signing_root.data, msg.signature)

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@ -644,19 +644,10 @@ proc process_consolidation*(
target_validator.withdrawal_credentials.data.toOpenArray(12, 31)):
return err("Consolidation: source and target don't have same withdrawal address")
debugComment "this is per spec, near-verbatim, but Nimbus generally factors this out into spec/signatures.nim. so, create verify_consolidation_signature infra there, call here"
# Verify consolidation is signed by the source and the target
let
domain = compute_domain(
DOMAIN_CONSOLIDATION, cfg.GENESIS_FORK_VERSION,
genesis_validators_root=state.genesis_validators_root)
signing_root = compute_signing_root(consolidation, domain)
pubkeys = [source_validator[].pubkey, target_validator.pubkey]
debugComment "as a good example, this trustedsig hack typically/should live in spec/signatures.nim"
when not (signed_consolidation.signature is TrustedSig):
if not blsFastAggregateVerify(
pubkeys, signing_root.data, signed_consolidation.signature):
if not verify_consolidation_signature(
cfg.genesisFork, state.genesis_validators_root, signed_consolidation,
[source_validator[].pubkey, target_validator.pubkey]):
return err("Consolidation: invalid signature")
# Initiate source validator exit and append pending consolidation
@ -667,8 +658,7 @@ proc process_consolidation*(
debugComment "check HashList add return value"
discard state.pending_consolidations.add(PendingConsolidation(
source_index: consolidation.source_index,
target_index: consolidation.target_index
))
target_index: consolidation.target_index))
ok()

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@ -208,8 +208,6 @@ proc addTestBlock*(
else:
default(bellatrix.ExecutionPayloadForSigning)
debugComment "addTestBlock Electra attestation support"
makeBeaconBlock(
cfg,
state,