mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-27 08:22:31 +00:00
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*
|
|
* ZeroTier One - Network Virtualization Everywhere
|
|
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "Capability.hpp"
|
|
#include "RuntimeEnvironment.hpp"
|
|
#include "Identity.hpp"
|
|
#include "Topology.hpp"
|
|
#include "Switch.hpp"
|
|
#include "Network.hpp"
|
|
|
|
namespace ZeroTier {
|
|
|
|
int Capability::verify(const RuntimeEnvironment *RR) const
|
|
{
|
|
try {
|
|
// There must be at least one entry, and sanity check for bad chain max length
|
|
if ((_maxCustodyChainLength < 1)||(_maxCustodyChainLength > ZT_MAX_CAPABILITY_CUSTODY_CHAIN_LENGTH))
|
|
return -1;
|
|
|
|
// Validate all entries in chain of custody
|
|
Buffer<(sizeof(Capability) * 2)> tmp;
|
|
this->serialize(tmp,true);
|
|
for(unsigned int c=0;c<_maxCustodyChainLength;++c) {
|
|
if (c == 0) {
|
|
if ((!_custody[c].to)||(!_custody[c].from)||(_custody[c].from != Network::controllerFor(_nwid)))
|
|
return -1; // the first entry must be present and from the network's controller
|
|
} else {
|
|
if (!_custody[c].to)
|
|
return 0; // all previous entries were valid, so we are valid
|
|
else if ((!_custody[c].from)||(_custody[c].from != _custody[c-1].to))
|
|
return -1; // otherwise if we have another entry it must be from the previous holder in the chain
|
|
}
|
|
|
|
const Identity id(RR->topology->getIdentity(_custody[c].from));
|
|
if (id) {
|
|
if (!id.verify(tmp.data(),tmp.size(),_custody[c].signature))
|
|
return -1;
|
|
} else {
|
|
RR->sw->requestWhois(_custody[c].from);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
// We reached max custody chain length and everything was valid
|
|
return 0;
|
|
} catch ( ... ) {}
|
|
return -1;
|
|
}
|
|
|
|
} // namespace ZeroTier
|