mirror of
https://github.com/zerotier/ZeroTierOne.git
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132 lines
5.6 KiB
C++
132 lines
5.6 KiB
C++
/*
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* Copyright (c)2013-2020 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: 2024-01-01
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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 "Network.hpp"
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#include "Topology.hpp"
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// These are compile-time asserts to make sure temporary marshal buffers here and
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// also in NtworkConfig.cpp are always large enough to marshal all credential types.
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#if ZT_TAG_MARSHAL_SIZE_MAX > ZT_BUF_MEM_SIZE
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#error ZT_TAG_MARSHAL_SIZE_MAX exceeds maximum buffer size
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#endif
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#if ZT_CAPABILITY_MARSHAL_SIZE_MAX > ZT_BUF_MEM_SIZE
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#error ZT_CAPABILITY_MARSHAL_SIZE_MAX exceeds maximum buffer size
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#endif
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#if ZT_REVOCATION_MARSHAL_SIZE_MAX > ZT_BUF_MEM_SIZE
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#error ZT_REVOCATION_MARSHAL_SIZE_MAX exceeds maximum buffer size
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#endif
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#if ZT_CERTIFICATEOFOWNERSHIP_MARSHAL_SIZE_MAX > ZT_BUF_MEM_SIZE
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#error ZT_CERTIFICATEOFOWNERSHIP_MARSHAL_SIZE_MAX exceeds maximum buffer size
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#endif
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#if ZT_CERTIFICATEOFMEMBERSHIP_MARSHAL_SIZE_MAX > ZT_BUF_MEM_SIZE
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#error ZT_CERTIFICATEOFMEMBERSHIP_MARSHAL_SIZE_MAX exceeds maximum buffer size
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#endif
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namespace ZeroTier {
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template<typename CRED>
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static ZT_ALWAYS_INLINE Credential::VerifyResult _credVerify(const RuntimeEnvironment *RR,void *tPtr,CRED credential)
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{
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uint8_t tmp[ZT_BUF_MEM_SIZE + 16];
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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 SharedPtr<Peer> peer(RR->topology->peer(tPtr,signedBy));
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if (!peer)
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return Credential::VERIFY_NEED_IDENTITY;
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try {
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int l = credential.marshal(tmp,true);
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if (l <= 0)
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return Credential::VERIFY_BAD_SIGNATURE;
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return (peer->identity().verify(tmp,(unsigned int)l,credential.signature(),credential.signatureLength()) ? Credential::VERIFY_OK : Credential::VERIFY_BAD_SIGNATURE);
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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 SharedPtr<Peer> peer(RR->topology->peer(tPtr,credential._signedBy));
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if (!peer)
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return Credential::VERIFY_NEED_IDENTITY;
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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 (peer->identity().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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uint8_t tmp[ZT_CAPABILITY_MARSHAL_SIZE_MAX + 16];
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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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int l = credential.marshal(tmp,true);
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if (l <= 0)
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return Credential::VERIFY_BAD_SIGNATURE;
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// Validate all entries in chain of custody
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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 SharedPtr<Peer> peer(RR->topology->peer(tPtr,credential._custody[c].from));
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if (peer) {
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if (!peer->identity().verify(tmp,(unsigned int)l,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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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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