mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-04-26 08:57:26 +02:00
281 lines
10 KiB
C++
281 lines
10 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 <algorithm>
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#include "Membership.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Peer.hpp"
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#include "Topology.hpp"
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#include "Node.hpp"
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namespace ZeroTier {
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Membership::Membership() :
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_comRevocationThreshold(0),
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_lastPushedCredentials(0),
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_comAgreementLocalTimestamp(0),
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_comAgreementRemoteTimestamp(0),
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_revocations(4),
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_remoteTags(4),
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_remoteCaps(4),
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_remoteCoos(4)
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{
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}
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Membership::~Membership()
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{
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}
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void Membership::pushCredentials(const RuntimeEnvironment *RR,void *tPtr,const int64_t now,const SharedPtr<Peer> &to,const NetworkConfig &nconf)
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{
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if (!nconf.com) // sanity check
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return;
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SharedPtr<Buf> outp(new Buf());
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Protocol::Header &ph = outp->as<Protocol::Header>();
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unsigned int capPtr = 0,tagPtr = 0,cooPtr = 0;
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bool sendCom = true;
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bool complete = false;
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while (!complete) {
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ph.packetId = Protocol::getPacketId();
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to->address().copyTo(ph.destination);
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RR->identity.address().copyTo(ph.source);
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ph.flags = 0;
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ph.verb = Protocol::VERB_NETWORK_CREDENTIALS;
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int outl = sizeof(Protocol::Header);
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if (sendCom) {
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sendCom = false;
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outp->wO(outl,nconf.com);
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}
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outp->wI8(outl,0);
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if ((outl + ZT_CAPABILITY_MARSHAL_SIZE_MAX + 2) < ZT_PROTO_MAX_PACKET_LENGTH) {
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void *const capCountAt = outp->unsafeData + outl;
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outl += 2;
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unsigned int capCount = 0;
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while (capPtr < nconf.capabilityCount) {
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outp->wO(outl,nconf.capabilities[capPtr++]);
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++capCount;
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if ((outl + ZT_CAPABILITY_MARSHAL_SIZE_MAX) >= ZT_PROTO_MAX_PACKET_LENGTH)
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break;
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}
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Utils::storeBigEndian(capCountAt,(uint16_t)capCount);
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if ((outl + ZT_TAG_MARSHAL_SIZE_MAX + 4) < ZT_PROTO_MAX_PACKET_LENGTH) {
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void *const tagCountAt = outp->unsafeData + outl;
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outl += 2;
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unsigned int tagCount = 0;
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while (tagPtr < nconf.tagCount) {
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outp->wO(outl,nconf.tags[tagPtr++]);
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++tagCount;
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if ((outl + ZT_TAG_MARSHAL_SIZE_MAX) >= ZT_PROTO_MAX_PACKET_LENGTH)
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break;
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}
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Utils::storeBigEndian(tagCountAt,(uint16_t)tagCount);
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outp->wI16(outl,0); // no revocations sent here as these propagate differently
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if ((outl + ZT_CERTIFICATEOFOWNERSHIP_MARSHAL_SIZE_MAX + 2) < ZT_PROTO_MAX_PACKET_LENGTH) {
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void *const cooCountAt = outp->unsafeData + outl;
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outl += 2;
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unsigned int cooCount = 0;
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while (cooPtr < nconf.certificateOfOwnershipCount) {
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outp->wO(outl,nconf.certificatesOfOwnership[cooPtr++]);
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++cooCount;
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if ((outl + ZT_CERTIFICATEOFOWNERSHIP_MARSHAL_SIZE_MAX) >= ZT_PROTO_MAX_PACKET_LENGTH)
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break;
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}
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Utils::storeBigEndian(cooCountAt,(uint16_t)cooCount);
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complete = true;
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} else {
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outp->wI16(outl,0);
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}
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} else {
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outp->wI32(outl,0);
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outp->wI16(outl,0); // three zero 16-bit integers
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}
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} else {
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outp->wI64(outl,0); // four zero 16-bit integers
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}
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if (outl > (int)sizeof(Protocol::Header)) {
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outl = Protocol::compress(outp,outl);
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// TODO
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}
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}
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_lastPushedCredentials = now;
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}
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void Membership::clean(const int64_t now,const NetworkConfig &nconf)
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{
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_cleanCredImpl<Tag>(nconf,_remoteTags);
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_cleanCredImpl<Capability>(nconf,_remoteCaps);
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_cleanCredImpl<CertificateOfOwnership>(nconf,_remoteCoos);
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}
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Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const Identity &sourcePeerIdentity,const NetworkConfig &nconf,const CertificateOfMembership &com)
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{
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const int64_t newts = com.timestamp();
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if (newts <= _comRevocationThreshold) {
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RR->t->credentialRejected(tPtr,0xd9992121,com.networkId(),sourcePeerIdentity.address(),sourcePeerIdentity,com.id(),com.timestamp(),ZT_CREDENTIAL_TYPE_COM,ZT_TRACE_CREDENTIAL_REJECTION_REASON_REVOKED);
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return ADD_REJECTED;
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}
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const int64_t oldts = _com.timestamp();
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if (newts < oldts) {
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RR->t->credentialRejected(tPtr,0xd9928192,com.networkId(),sourcePeerIdentity.address(),sourcePeerIdentity,com.id(),com.timestamp(),ZT_CREDENTIAL_TYPE_COM,ZT_TRACE_CREDENTIAL_REJECTION_REASON_OLDER_THAN_LATEST);
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return ADD_REJECTED;
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}
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if ((newts == oldts)&&(_com == com))
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return ADD_ACCEPTED_REDUNDANT;
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switch(com.verify(RR,tPtr)) {
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default:
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RR->t->credentialRejected(tPtr,0x0f198241,com.networkId(),sourcePeerIdentity.address(),sourcePeerIdentity,com.id(),com.timestamp(),ZT_CREDENTIAL_TYPE_COM,ZT_TRACE_CREDENTIAL_REJECTION_REASON_INVALID);
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return Membership::ADD_REJECTED;
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case Credential::VERIFY_OK:
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_com = com;
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return ADD_ACCEPTED_NEW;
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case Credential::VERIFY_BAD_SIGNATURE:
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RR->t->credentialRejected(tPtr,0xbaf0aaaa,com.networkId(),sourcePeerIdentity.address(),sourcePeerIdentity,com.id(),com.timestamp(),ZT_CREDENTIAL_TYPE_COM,ZT_TRACE_CREDENTIAL_REJECTION_REASON_SIGNATURE_VERIFICATION_FAILED);
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return ADD_REJECTED;
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case Credential::VERIFY_NEED_IDENTITY:
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return ADD_DEFERRED_FOR_WHOIS;
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}
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}
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// 3/5 of the credential types have identical addCredential() code
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template<typename C>
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static ZT_INLINE Membership::AddCredentialResult _addCredImpl(
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Hashtable<uint32_t,C> &remoteCreds,
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const Hashtable<uint64_t,int64_t> &revocations,
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const RuntimeEnvironment *const RR,
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void *const tPtr,
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const Identity &sourcePeerIdentity,
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const NetworkConfig &nconf,
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const C &cred)
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{
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C *rc = remoteCreds.get(cred.id());
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if (rc) {
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if (rc->timestamp() > cred.timestamp()) {
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RR->t->credentialRejected(tPtr,0x40000001,nconf.networkId,sourcePeerIdentity.address(),sourcePeerIdentity,cred.id(),cred.timestamp(),C::credentialType(),ZT_TRACE_CREDENTIAL_REJECTION_REASON_OLDER_THAN_LATEST);
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return Membership::ADD_REJECTED;
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}
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if (*rc == cred)
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return Membership::ADD_ACCEPTED_REDUNDANT;
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}
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const int64_t *const rt = revocations.get(Membership::credentialKey(C::credentialType(),cred.id()));
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if ((rt)&&(*rt >= cred.timestamp())) {
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RR->t->credentialRejected(tPtr,0x24248124,nconf.networkId,sourcePeerIdentity.address(),sourcePeerIdentity,cred.id(),cred.timestamp(),C::credentialType(),ZT_TRACE_CREDENTIAL_REJECTION_REASON_REVOKED);
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return Membership::ADD_REJECTED;
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}
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switch(cred.verify(RR,tPtr)) {
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default:
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RR->t->credentialRejected(tPtr,0x01feba012,nconf.networkId,sourcePeerIdentity.address(),sourcePeerIdentity,cred.id(),cred.timestamp(),C::credentialType(),ZT_TRACE_CREDENTIAL_REJECTION_REASON_INVALID);
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return Membership::ADD_REJECTED;
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case 0:
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if (!rc)
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rc = &(remoteCreds[cred.id()]);
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*rc = cred;
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return Membership::ADD_ACCEPTED_NEW;
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case 1:
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return Membership::ADD_DEFERRED_FOR_WHOIS;
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}
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}
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Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const Identity &sourcePeerIdentity,const NetworkConfig &nconf,const Tag &tag) { return _addCredImpl<Tag>(_remoteTags,_revocations,RR,tPtr,sourcePeerIdentity,nconf,tag); }
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Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const Identity &sourcePeerIdentity,const NetworkConfig &nconf,const Capability &cap) { return _addCredImpl<Capability>(_remoteCaps,_revocations,RR,tPtr,sourcePeerIdentity,nconf,cap); }
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Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const Identity &sourcePeerIdentity,const NetworkConfig &nconf,const CertificateOfOwnership &coo) { return _addCredImpl<CertificateOfOwnership>(_remoteCoos,_revocations,RR,tPtr,sourcePeerIdentity,nconf,coo); }
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Membership::AddCredentialResult Membership::addCredential(const RuntimeEnvironment *RR,void *tPtr,const Identity &sourcePeerIdentity,const NetworkConfig &nconf,const Revocation &rev)
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{
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int64_t *rt;
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switch(rev.verify(RR,tPtr)) {
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default:
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RR->t->credentialRejected(tPtr,0x938fffff,nconf.networkId,sourcePeerIdentity.address(),sourcePeerIdentity,rev.id(),0,ZT_CREDENTIAL_TYPE_REVOCATION,ZT_TRACE_CREDENTIAL_REJECTION_REASON_INVALID);
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return ADD_REJECTED;
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case 0: {
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const ZT_CredentialType ct = rev.typeBeingRevoked();
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switch(ct) {
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case ZT_CREDENTIAL_TYPE_COM:
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if (rev.threshold() > _comRevocationThreshold) {
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_comRevocationThreshold = rev.threshold();
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return ADD_ACCEPTED_NEW;
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}
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return ADD_ACCEPTED_REDUNDANT;
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case ZT_CREDENTIAL_TYPE_CAPABILITY:
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case ZT_CREDENTIAL_TYPE_TAG:
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case ZT_CREDENTIAL_TYPE_COO:
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rt = &(_revocations[credentialKey(ct,rev.credentialId())]);
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if (*rt < rev.threshold()) {
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*rt = rev.threshold();
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_comRevocationThreshold = rev.threshold();
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return ADD_ACCEPTED_NEW;
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}
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return ADD_ACCEPTED_REDUNDANT;
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default:
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RR->t->credentialRejected(tPtr,0x0bbbb1a4,nconf.networkId,sourcePeerIdentity.address(),sourcePeerIdentity,rev.id(),0,ZT_CREDENTIAL_TYPE_REVOCATION,ZT_TRACE_CREDENTIAL_REJECTION_REASON_INVALID);
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return ADD_REJECTED;
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}
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}
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case 1:
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return ADD_DEFERRED_FOR_WHOIS;
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}
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}
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bool Membership::_isUnspoofableAddress(const NetworkConfig &nconf,const InetAddress &ip) const noexcept
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{
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if ((ip.isV6())&&(nconf.ndpEmulation())) {
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const InetAddress sixpl(InetAddress::makeIpv66plane(nconf.networkId,nconf.issuedTo.toInt()));
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for(unsigned int i=0;i<nconf.staticIpCount;++i) {
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if (nconf.staticIps[i].ipsEqual(sixpl)) {
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bool prefixMatches = true;
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for(unsigned int j=0;j<5;++j) { // check for match on /40
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if ((((const struct sockaddr_in6 *)&ip)->sin6_addr.s6_addr)[j] != (((const struct sockaddr_in6 *)&sixpl)->sin6_addr.s6_addr)[j]) {
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prefixMatches = false;
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break;
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}
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}
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if (prefixMatches)
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return true;
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break;
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}
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}
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const InetAddress rfc4193(InetAddress::makeIpv6rfc4193(nconf.networkId,nconf.issuedTo.toInt()));
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for(unsigned int i=0;i<nconf.staticIpCount;++i) {
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if (nconf.staticIps[i].ipsEqual(rfc4193)) {
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bool prefixMatches = true;
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for(unsigned int j=0;j<11;++j) { // check for match on /88
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if ((((const struct sockaddr_in6 *)&ip)->sin6_addr.s6_addr)[j] != (((const struct sockaddr_in6 *)&rfc4193)->sin6_addr.s6_addr)[j]) {
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prefixMatches = false;
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break;
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}
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}
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if (prefixMatches)
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return true;
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break;
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}
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}
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}
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return false;
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}
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} // namespace ZeroTier
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