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More World stuff, and mkworld.

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This commit is contained in:
Adam Ierymenko 2015-10-13 08:49:36 -07:00
parent 1b1945c63e
commit cae58f43f1
13 changed files with 281 additions and 105 deletions
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60
node/World.hpp
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@ -55,7 +55,7 @@
/**
* The (more than) maximum length of a serialized World
*/
#define ZT_WORLD_MAX_SERIALIZED_LENGTH (((1024 + (32 * ZT_WORLD_MAX_STABLE_ENDPOINTS_PER_ROOT)) * ZT_WORLD_MAX_ROOTS) + ZT_C25519_PUBLIC_KEY_LEN + ZT_C25519_SIGNATURE_LEN + 64)
#define ZT_WORLD_MAX_SERIALIZED_LENGTH (((1024 + (32 * ZT_WORLD_MAX_STABLE_ENDPOINTS_PER_ROOT)) * ZT_WORLD_MAX_ROOTS) + ZT_C25519_PUBLIC_KEY_LEN + ZT_C25519_SIGNATURE_LEN + 128)
/**
* World ID indicating null / empty World object
@ -68,15 +68,11 @@
#define ZT_WORLD_ID_TESTNET 1
/**
* World ID for Earth -- its approximate distance from the sun in kilometers
* World ID for Earth
*
* This is the ID for the ZeroTier World used on planet Earth. It is unrelated
* to the public network 8056c2e21c000001 of the same name.
*
* It's advisable to create a new World for network regions spaced more than
* 2-3 light seconds, since RTT times in excess of 5s are problematic for some
* protocols. Earth could therefore include its low and high orbits, the Moon,
* and nearby Lagrange points.
* to the public network 8056c2e21c000001 of the same name. It was chosen
* from Earth's approximate distance from the sun in kilometers.
*/
#define ZT_WORLD_ID_EARTH 149604618
@ -90,9 +86,24 @@ namespace ZeroTier {
/**
* A world definition (formerly known as a root topology)
*
* A world consists of a set of root servers and a signature scheme enabling
* it to be updated going forward. It defines a single ZeroTier VL1 network
* area within which any device can reach any other.
* Think of a World as a single data center. Within this data center a set
* of distributed fault tolerant root servers provide stable anchor points
* for a peer to peer network that provides VLAN service. Updates to a world
* definition can be published by signing them with the previous revision's
* signing key, and should be very infrequent.
*
* The maximum data center size is approximately 2.5 cubic light seconds,
* since many protocols have issues with >5s RTT latencies.
*
* ZeroTier operates a World for Earth capable of encompassing the planet, its
* orbits, the Moon (about 1.3 light seconds), and nearby Lagrange points. A
* world ID for Mars and nearby space is defined but not yet used, and a test
* world ID is provided for testing purposes.
*
* If you absolutely must run your own "unofficial" ZeroTier network, please
* define your world IDs above 0xffffffff (4294967295). Code to make a World
* is in mkworld.cpp in the parent directory and must be edited to change
* settings.
*/
class World
{
@ -130,24 +141,28 @@ public:
inline uint64_t timestamp() const throw() { return _ts; }
/**
* Verify a world update
* Check whether a world update should replace this one
*
* A new world update is valid if it is for the same world ID, is newer,
* and is signed by the current world's signing key. If this world object
* is null, it can always be updated.
*
* @param update Candidate update
* @param fullSignatureCheck Perform full cryptographic signature check (true == yes, false == skip)
* @return True if update is newer than current and is properly signed
*/
inline bool verifyUpdate(const World &update)
inline bool shouldBeReplacedBy(const World &update,bool fullSignatureCheck)
{
if (_id == ZT_WORLD_ID_NULL)
return true;
if ((update._id != _id)||(update._ts <= _ts))
return false;
Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH> tmp;
update.serialize(tmp);
return C25519::verify(_updateSigningKey,tmp.data(),tmp.size(),update._signature);
if ((_id == update._id)&&(_ts < update._ts)) {
if (fullSignatureCheck) {
Buffer<ZT_WORLD_MAX_SERIALIZED_LENGTH> tmp;
update.serialize(tmp,true);
return C25519::verify(_updateSigningKey,tmp.data(),tmp.size(),update._signature);
} else return true;
}
return false;
}
/**
@ -156,13 +171,16 @@ public:
inline operator bool() const throw() { return (_id != ZT_WORLD_ID_NULL); }
template<unsigned int C>
inline void serialize(Buffer<C> &b) const
inline void serialize(Buffer<C> &b,bool forSign = false) const
{
if (forSign)
b.append((uint64_t)0x7f7f7f7f7f7f7f7fULL);
b.append((uint8_t)0x01); // version -- only one valid value for now
b.append((uint64_t)_id);
b.append((uint64_t)_ts);
b.append(_updateSigningKey.data,ZT_C25519_PUBLIC_KEY_LEN);
b.append(_signature.data,ZT_C25519_SIGNATURE_LEN);
if (!forSign)
b.append(_signature.data,ZT_C25519_SIGNATURE_LEN);
b.append((uint8_t)_roots.size());
for(std::vector<Root>::const_iterator r(_roots.begin());r!=_roots.end();++r) {
r->identity.serialize(b);
@ -170,6 +188,8 @@ public:
for(std::vector<InetAddress>::const_iterator ep(r->stableEndpoints.begin());ep!=r->stableEndpoints.end();++ep)
ep->serialize(b);
}
if (forSign)
b.append((uint64_t)0xf7f7f7f7f7f7f7f7ULL);
}
template<unsigned int C>