mirror of
https://github.com/didyouexpectthat/zerotierone.git
synced 2024-09-19 04:10:20 -07:00
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Capability.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Identity.hpp"
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#include "Topology.hpp"
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#include "Switch.hpp"
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#include "Network.hpp"
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namespace ZeroTier {
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int Capability::verify(const RuntimeEnvironment *RR,void *tPtr) const
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{
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try {
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// There must be at least one entry, and sanity check for bad chain max length
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if ((_maxCustodyChainLength < 1)||(_maxCustodyChainLength > ZT_MAX_CAPABILITY_CUSTODY_CHAIN_LENGTH))
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return -1;
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// Validate all entries in chain of custody
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Buffer<(sizeof(Capability) * 2)> tmp;
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this->serialize(tmp,true);
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for(unsigned int c=0;c<_maxCustodyChainLength;++c) {
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if (c == 0) {
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if ((!_custody[c].to)||(!_custody[c].from)||(_custody[c].from != Network::controllerFor(_nwid)))
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return -1; // the first entry must be present and from the network's controller
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} else {
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if (!_custody[c].to)
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return 0; // all previous entries were valid, so we are valid
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else if ((!_custody[c].from)||(_custody[c].from != _custody[c-1].to))
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return -1; // otherwise if we have another entry it must be from the previous holder in the chain
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}
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const Identity id(RR->topology->getIdentity(tPtr,_custody[c].from));
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if (id) {
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if (!id.verify(tmp.data(),tmp.size(),_custody[c].signature))
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return -1;
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} else {
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RR->sw->requestWhois(tPtr,_custody[c].from);
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return 1;
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}
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}
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// We reached max custody chain length and everything was valid
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return 0;
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} catch ( ... ) {}
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return -1;
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}
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} // namespace ZeroTier
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