mirror of
https://github.com/zerotier/ZeroTierOne.git
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113 lines
4.9 KiB
C++
113 lines
4.9 KiB
C++
/*
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* Copyright (c)2019 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2023-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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#include "Constants.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Credential.hpp"
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#include "Capability.hpp"
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#include "Tag.hpp"
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#include "CertificateOfMembership.hpp"
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#include "CertificateOfOwnership.hpp"
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#include "Revocation.hpp"
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#include "Switch.hpp"
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#include "Network.hpp"
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#include "ScopedPtr.hpp"
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namespace ZeroTier {
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template<typename CRED>
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static inline Credential::VerifyResult _credVerify(const RuntimeEnvironment *const RR,void *tPtr,CRED credential)
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{
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const Address signedBy(credential.signer());
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const uint64_t networkId = credential.networkId();
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if ((!signedBy)||(signedBy != Network::controllerFor(networkId)))
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return Credential::VERIFY_BAD_SIGNATURE;
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const Identity id(RR->topology->getIdentity(tPtr,signedBy));
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if (!id) {
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RR->sw->requestWhois(tPtr,RR->node->now(),signedBy);
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return Credential::VERIFY_NEED_IDENTITY;
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}
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try {
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ScopedPtr< Buffer<(sizeof(CRED) + 64)> > tmp(new Buffer<(sizeof(CRED) + 64)>());
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credential.serialize(*tmp,true);
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const Credential::VerifyResult result = (id.verify(tmp->data(),tmp->size(),credential.signature(),credential.signatureLength()) ? Credential::VERIFY_OK : Credential::VERIFY_BAD_SIGNATURE);
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return result;
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} catch ( ... ) {}
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return Credential::VERIFY_BAD_SIGNATURE;
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}
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Credential::VerifyResult Credential::_verify(const RuntimeEnvironment *const RR,void *tPtr,const Revocation &credential) const { return _credVerify(RR,tPtr,credential); }
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Credential::VerifyResult Credential::_verify(const RuntimeEnvironment *const RR,void *tPtr,const Tag &credential) const { return _credVerify(RR,tPtr,credential); }
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Credential::VerifyResult Credential::_verify(const RuntimeEnvironment *const RR,void *tPtr,const CertificateOfOwnership &credential) const { return _credVerify(RR,tPtr,credential); }
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Credential::VerifyResult Credential::_verify(const RuntimeEnvironment *const RR,void *tPtr,const CertificateOfMembership &credential) const
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{
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if ((!credential._signedBy)||(credential._signedBy != Network::controllerFor(credential.networkId()))||(credential._qualifierCount > ZT_NETWORK_COM_MAX_QUALIFIERS))
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return Credential::VERIFY_BAD_SIGNATURE;
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const Identity id(RR->topology->getIdentity(tPtr,credential._signedBy));
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if (!id) {
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RR->sw->requestWhois(tPtr,RR->node->now(),credential._signedBy);
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return Credential::VERIFY_NEED_IDENTITY;
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}
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uint64_t buf[ZT_NETWORK_COM_MAX_QUALIFIERS * 3];
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unsigned int ptr = 0;
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for(unsigned int i=0;i<credential._qualifierCount;++i) {
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buf[ptr++] = Utils::hton(credential._qualifiers[i].id);
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buf[ptr++] = Utils::hton(credential._qualifiers[i].value);
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buf[ptr++] = Utils::hton(credential._qualifiers[i].maxDelta);
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}
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return (id.verify(buf,ptr * sizeof(uint64_t),credential._signature,credential._signatureLength) ? Credential::VERIFY_OK : Credential::VERIFY_BAD_SIGNATURE);
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}
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Credential::VerifyResult Credential::_verify(const RuntimeEnvironment *RR,void *tPtr,const Capability &credential) 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 ((credential._maxCustodyChainLength < 1)||(credential._maxCustodyChainLength > ZT_MAX_CAPABILITY_CUSTODY_CHAIN_LENGTH))
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return Credential::VERIFY_BAD_SIGNATURE;
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// Validate all entries in chain of custody
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Buffer<(sizeof(Capability) * 2)> tmp;
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credential.serialize(tmp,true);
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for(unsigned int c=0;c<credential._maxCustodyChainLength;++c) {
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if (c == 0) {
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if ((!credential._custody[c].to)||(!credential._custody[c].from)||(credential._custody[c].from != Network::controllerFor(credential._nwid)))
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return Credential::VERIFY_BAD_SIGNATURE; // the first entry must be present and from the network's controller
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} else {
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if (!credential._custody[c].to)
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return Credential::VERIFY_OK; // all previous entries were valid, so we are valid
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else if ((!credential._custody[c].from)||(credential._custody[c].from != credential._custody[c-1].to))
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return Credential::VERIFY_BAD_SIGNATURE; // 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,credential._custody[c].from));
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if (id) {
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if (!id.verify(tmp.data(),tmp.size(),credential._custody[c].signature,credential._custody[c].signatureLength))
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return Credential::VERIFY_BAD_SIGNATURE;
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} else {
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RR->sw->requestWhois(tPtr,RR->node->now(),credential._custody[c].from);
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return Credential::VERIFY_NEED_IDENTITY;
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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 Credential::VERIFY_OK;
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} catch ( ... ) {}
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return Credential::VERIFY_BAD_SIGNATURE;
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}
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} // namespace ZeroTier
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