removed all contents
This commit is contained in:
Joseph Henry
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/*
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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 "CertificateOfMembership.hpp"
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#include "RuntimeEnvironment.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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void CertificateOfMembership::setQualifier(uint64_t id,uint64_t value,uint64_t maxDelta)
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{
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_signedBy.zero();
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for(unsigned int i=0;i<_qualifierCount;++i) {
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if (_qualifiers[i].id == id) {
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_qualifiers[i].value = value;
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_qualifiers[i].maxDelta = maxDelta;
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return;
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}
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}
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if (_qualifierCount < ZT_NETWORK_COM_MAX_QUALIFIERS) {
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_qualifiers[_qualifierCount].id = id;
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_qualifiers[_qualifierCount].value = value;
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_qualifiers[_qualifierCount].maxDelta = maxDelta;
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++_qualifierCount;
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std::sort(&(_qualifiers[0]),&(_qualifiers[_qualifierCount]));
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}
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}
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#ifdef ZT_SUPPORT_OLD_STYLE_NETCONF
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std::string CertificateOfMembership::toString() const
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{
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std::string s;
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s.append("1:"); // COM_UINT64_ED25519
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uint64_t *const buf = new uint64_t[_qualifierCount * 3];
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try {
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unsigned int ptr = 0;
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for(unsigned int i=0;i<_qualifierCount;++i) {
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buf[ptr++] = Utils::hton(_qualifiers[i].id);
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buf[ptr++] = Utils::hton(_qualifiers[i].value);
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buf[ptr++] = Utils::hton(_qualifiers[i].maxDelta);
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}
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s.append(Utils::hex(buf,ptr * sizeof(uint64_t)));
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delete [] buf;
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} catch ( ... ) {
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delete [] buf;
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throw;
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}
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s.push_back(':');
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s.append(_signedBy.toString());
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if (_signedBy) {
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s.push_back(':');
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s.append(Utils::hex(_signature.data,(unsigned int)_signature.size()));
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}
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return s;
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}
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void CertificateOfMembership::fromString(const char *s)
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{
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_qualifierCount = 0;
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_signedBy.zero();
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memset(_signature.data,0,_signature.size());
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if (!*s)
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return;
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unsigned int colonAt = 0;
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while ((s[colonAt])&&(s[colonAt] != ':')) ++colonAt;
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if (!((colonAt == 1)&&(s[0] == '1'))) // COM_UINT64_ED25519?
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return;
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s += colonAt + 1;
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colonAt = 0;
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while ((s[colonAt])&&(s[colonAt] != ':')) ++colonAt;
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if (colonAt) {
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const unsigned int buflen = colonAt / 2;
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char *const buf = new char[buflen];
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unsigned int bufactual = Utils::unhex(s,colonAt,buf,buflen);
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char *bufptr = buf;
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try {
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while (bufactual >= 24) {
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if (_qualifierCount < ZT_NETWORK_COM_MAX_QUALIFIERS) {
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_qualifiers[_qualifierCount].id = Utils::ntoh(*((uint64_t *)bufptr)); bufptr += 8;
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_qualifiers[_qualifierCount].value = Utils::ntoh(*((uint64_t *)bufptr)); bufptr += 8;
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_qualifiers[_qualifierCount].maxDelta = Utils::ntoh(*((uint64_t *)bufptr)); bufptr += 8;
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++_qualifierCount;
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} else {
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bufptr += 24;
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}
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bufactual -= 24;
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}
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} catch ( ... ) {}
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delete [] buf;
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}
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if (s[colonAt]) {
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s += colonAt + 1;
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colonAt = 0;
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while ((s[colonAt])&&(s[colonAt] != ':')) ++colonAt;
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if (colonAt) {
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char addrbuf[ZT_ADDRESS_LENGTH];
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if (Utils::unhex(s,colonAt,addrbuf,sizeof(addrbuf)) == ZT_ADDRESS_LENGTH)
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_signedBy.setTo(addrbuf,ZT_ADDRESS_LENGTH);
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if ((_signedBy)&&(s[colonAt])) {
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s += colonAt + 1;
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colonAt = 0;
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while ((s[colonAt])&&(s[colonAt] != ':')) ++colonAt;
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if (colonAt) {
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if (Utils::unhex(s,colonAt,_signature.data,(unsigned int)_signature.size()) != _signature.size())
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_signedBy.zero();
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} else {
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_signedBy.zero();
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}
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} else {
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_signedBy.zero();
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}
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}
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}
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std::sort(&(_qualifiers[0]),&(_qualifiers[_qualifierCount]));
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}
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#endif // ZT_SUPPORT_OLD_STYLE_NETCONF
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bool CertificateOfMembership::agreesWith(const CertificateOfMembership &other) const
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{
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unsigned int myidx = 0;
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unsigned int otheridx = 0;
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if ((_qualifierCount == 0)||(other._qualifierCount == 0))
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return false;
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while (myidx < _qualifierCount) {
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// Fail if we're at the end of other, since this means the field is
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// missing.
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if (otheridx >= other._qualifierCount)
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return false;
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// Seek to corresponding tuple in other, ignoring tuples that
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// we may not have. If we run off the end of other, the tuple is
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// missing. This works because tuples are sorted by ID.
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while (other._qualifiers[otheridx].id != _qualifiers[myidx].id) {
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++otheridx;
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if (otheridx >= other._qualifierCount)
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return false;
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}
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// Compare to determine if the absolute value of the difference
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// between these two parameters is within our maxDelta.
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const uint64_t a = _qualifiers[myidx].value;
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const uint64_t b = other._qualifiers[myidx].value;
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if (((a >= b) ? (a - b) : (b - a)) > _qualifiers[myidx].maxDelta)
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return false;
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++myidx;
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}
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return true;
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}
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bool CertificateOfMembership::sign(const Identity &with)
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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<_qualifierCount;++i) {
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buf[ptr++] = Utils::hton(_qualifiers[i].id);
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buf[ptr++] = Utils::hton(_qualifiers[i].value);
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buf[ptr++] = Utils::hton(_qualifiers[i].maxDelta);
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}
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try {
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_signature = with.sign(buf,ptr * sizeof(uint64_t));
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_signedBy = with.address();
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return true;
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} catch ( ... ) {
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_signedBy.zero();
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return false;
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}
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}
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int CertificateOfMembership::verify(const RuntimeEnvironment *RR,void *tPtr) const
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{
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if ((!_signedBy)||(_signedBy != Network::controllerFor(networkId()))||(_qualifierCount > ZT_NETWORK_COM_MAX_QUALIFIERS))
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return -1;
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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,_signedBy);
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return 1;
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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<_qualifierCount;++i) {
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buf[ptr++] = Utils::hton(_qualifiers[i].id);
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buf[ptr++] = Utils::hton(_qualifiers[i].value);
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buf[ptr++] = Utils::hton(_qualifiers[i].maxDelta);
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}
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return (id.verify(buf,ptr * sizeof(uint64_t),_signature) ? 0 : -1);
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}
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} // namespace ZeroTier
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