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Add a bit of hardening in the network certificate of membership by incorporating a full hash of the identity to which it is issued. This means the recipient need not depend entirely on the root verifying identities properly to make sure impersonation is not occurring.

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Adam Ierymenko 2021-09-20 18:26:49 -04:00 • committed by Grant Limberg
parent 9cfb807fcb
commit 134d33c218
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GPG key ID: 2BA62CCABBB4095A
7 changed files with 78 additions and 42 deletions
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9
node/Network.cpp
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@ -1227,7 +1227,7 @@ bool Network::gate(void *tPtr,const SharedPtr<Peer> &peer)
try {
if (_config) {
Membership *m = _memberships.get(peer->address());
if ( (_config.isPublic()) || ((m)&&(m->isAllowedOnNetwork(_config))) ) {
if ( (_config.isPublic()) || ((m)&&(m->isAllowedOnNetwork(_config, peer->identity()))) ) {
if (!m)
m = &(_membership(peer->address()));
if (m->multicastLikeGate(now)) {
@ -1487,8 +1487,11 @@ void Network::_sendUpdatesToMembers(void *tPtr,const MulticastGroup *const newMu
Membership *m = (Membership *)0;
Hashtable<Address,Membership>::Iterator i(_memberships);
while (i.next(a,m)) {
if ( ( m->multicastLikeGate(now) || (newMulticastGroup) ) && (m->isAllowedOnNetwork(_config)) && (!std::binary_search(alwaysAnnounceTo.begin(),alwaysAnnounceTo.end(),*a)) )
_announceMulticastGroupsTo(tPtr,*a,groups);
const Identity remoteIdentity(RR->topology->getIdentity(tPtr, *a));
if (remoteIdentity) {
if ( ( m->multicastLikeGate(now) || (newMulticastGroup) ) && (m->isAllowedOnNetwork(_config, remoteIdentity)) && (!std::binary_search(alwaysAnnounceTo.begin(),alwaysAnnounceTo.end(),*a)) )
_announceMulticastGroupsTo(tPtr,*a,groups);
}
}
}
}