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Code Issues Releases Activity

Database lookups from ECIES destinations

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This commit is contained in:
orignal 2020-09-19 21:15:42 -04:00
parent 024c29b180
commit 09fdb068d2
5 changed files with 34 additions and 9 deletions
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11
libi2pd/Destination.cpp
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@ -744,14 +744,19 @@ namespace client
request->excluded.insert (nextFloodfill->GetIdentHash ());
request->requestTimeoutTimer.cancel ();
bool isECIES = SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET) &&
nextFloodfill->GetVersion () >= MAKE_VERSION_NUMBER(0, 9, 46); // >= 0.9.46;
uint8_t replyKey[32], replyTag[32];
RAND_bytes (replyKey, 32); // random session key
RAND_bytes (replyTag, 32); // random session tag
AddSessionKey (replyKey, replyTag);
RAND_bytes (replyTag, isECIES ? 8 : 32); // random session tag
if (isECIES)
AddECIESx25519Key (replyKey, replyTag);
else
AddSessionKey (replyKey, replyTag);
auto msg = WrapMessage (nextFloodfill,
CreateLeaseSetDatabaseLookupMsg (dest, request->excluded,
request->replyTunnel, replyKey, replyTag));
request->replyTunnel, replyKey, replyTag, isECIES));
request->outboundTunnel->SendTunnelDataMsg (
{
i2p::tunnel::TunnelMessageBlock

8
libi2pd/Garlic.cpp
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@ -460,6 +460,14 @@ namespace garlic
}
}
void GarlicDestination::AddECIESx25519Key (const uint8_t * key, const uint8_t * tag)
{
uint64_t t;
memcpy (&t, tag, 8);
auto tagset = std::make_shared<DatabaseLookupTagSet>(this, key);
m_ECIESx25519Tags.emplace (t, ECIESX25519AEADRatchetIndexTagset{0, tagset});
}
bool GarlicDestination::SubmitSessionKey (const uint8_t * key, const uint8_t * tag)
{
AddSessionKey (key, tag);

1
libi2pd/Garlic.h
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@ -241,6 +241,7 @@ namespace garlic
std::shared_ptr<I2NPMessage> msg, bool attachLeaseSet = false);
void AddSessionKey (const uint8_t * key, const uint8_t * tag); // one tag
void AddECIESx25519Key (const uint8_t * key, const uint8_t * tag); // one tag
virtual bool SubmitSessionKey (const uint8_t * key, const uint8_t * tag); // from different thread
void DeliveryStatusSent (GarlicRoutingSessionPtr session, uint32_t msgID);
void AddECIESx25519SessionNextTag (RatchetTagSetPtr tagset);

18
libi2pd/I2NPProtocol.cpp
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@ -171,7 +171,8 @@ namespace i2p
std::shared_ptr<I2NPMessage> CreateLeaseSetDatabaseLookupMsg (const i2p::data::IdentHash& dest,
const std::set<i2p::data::IdentHash>& excludedFloodfills,
std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey, const uint8_t * replyTag)
std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey,
const uint8_t * replyTag, bool replyECIES)
{
int cnt = excludedFloodfills.size ();
auto m = cnt > 7 ? NewI2NPMessage () : NewI2NPShortMessage ();
@ -180,7 +181,8 @@ namespace i2p
buf += 32;
memcpy (buf, replyTunnel->GetNextIdentHash (), 32); // reply tunnel GW
buf += 32;
*buf = DATABASE_LOOKUP_DELIVERY_FLAG | DATABASE_LOOKUP_ENCRYPTION_FLAG | DATABASE_LOOKUP_TYPE_LEASESET_LOOKUP; // flags
*buf = DATABASE_LOOKUP_DELIVERY_FLAG | DATABASE_LOOKUP_TYPE_LEASESET_LOOKUP; // flags
*buf |= (replyECIES ? DATABASE_LOOKUP_ECIES_FLAG : DATABASE_LOOKUP_ENCRYPTION_FLAG);
buf ++;
htobe32buf (buf, replyTunnel->GetNextTunnelID ()); // reply tunnel ID
buf += 4;
@ -204,8 +206,16 @@ namespace i2p
// encryption
memcpy (buf, replyKey, 32);
buf[32] = 1; // 1 tag
memcpy (buf + 33, replyTag, 32);
buf += 65;
if (replyECIES)
{
memcpy (buf + 33, replyTag, 8); // 8 bytes tag
buf += 41;
}
else
{
memcpy (buf + 33, replyTag, 32); // 32 bytes tag
buf += 65;
}
m->len += (buf - m->GetPayload ());
m->FillI2NPMessageHeader (eI2NPDatabaseLookup);

5
libi2pd/I2NPProtocol.h
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@ -251,8 +251,9 @@ namespace tunnel
std::shared_ptr<I2NPMessage> CreateRouterInfoDatabaseLookupMsg (const uint8_t * key, const uint8_t * from,
uint32_t replyTunnelID, bool exploratory = false, std::set<i2p::data::IdentHash> * excludedPeers = nullptr);
std::shared_ptr<I2NPMessage> CreateLeaseSetDatabaseLookupMsg (const i2p::data::IdentHash& dest,
const std::set<i2p::data::IdentHash>& excludedFloodfills,
std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel, const uint8_t * replyKey, const uint8_t * replyTag);
const std::set<i2p::data::IdentHash>& excludedFloodfills,
std::shared_ptr<const i2p::tunnel::InboundTunnel> replyTunnel,
const uint8_t * replyKey, const uint8_t * replyTag, bool replyECIES = false);
std::shared_ptr<I2NPMessage> CreateDatabaseSearchReply (const i2p::data::IdentHash& ident, std::vector<i2p::data::IdentHash> routers);
std::shared_ptr<I2NPMessage> CreateDatabaseStoreMsg (std::shared_ptr<const i2p::data::RouterInfo> router = nullptr, uint32_t replyToken = 0);