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crypto.ratchet.inboundTags

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orignal 2020-06-12 20:42:54 -04:00
parent 5e0a8ed232
commit 61897ae16c
6 changed files with 35 additions and 9 deletions
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3
libi2pd/Destination.cpp
View file

@ -56,6 +56,9 @@ namespace client
if (it != params->end ())
numTags = std::stoi(it->second);
LogPrint (eLogInfo, "Destination: parameters for tunnel set to: ", inQty, " inbound (", inLen, " hops), ", outQty, " outbound (", outLen, " hops), ", numTags, " tags");
it = params->find (I2CP_PARAM_RATCHET_INBOUND_TAGS);
if (it != params->end ())
SetNumRatchetInboundTags (std::stoi(it->second));
it = params->find (I2CP_PARAM_EXPLICIT_PEERS);
if (it != params->end ())
{

2
libi2pd/Destination.h
View file

@ -57,6 +57,8 @@ namespace client
const int STREAM_REQUEST_TIMEOUT = 60; //in seconds
const char I2CP_PARAM_TAGS_TO_SEND[] = "crypto.tagsToSend";
const int DEFAULT_TAGS_TO_SEND = 40;
const char I2CP_PARAM_RATCHET_INBOUND_TAGS[] = "crypto.ratchet.inboundTags";
const char I2CP_PARAM_RATCHET_OUTBOUND_TAGS[] = "crypto.ratchet.outboundTags"; // not used yet
const char I2CP_PARAM_INBOUND_NICKNAME[] = "inbound.nickname";
const char I2CP_PARAM_OUTBOUND_NICKNAME[] = "outbound.nickname";
const char I2CP_PARAM_LEASESET_TYPE[] = "i2cp.leaseSetType";

31
libi2pd/ECIESX25519AEADRatchetSession.cpp
View file

@ -341,7 +341,8 @@ namespace garlic
newTagset->SetTagSetID (tagsetID);
newTagset->DHInitialize (receiveTagset->GetNextRootKey (), tagsetKey);
newTagset->NextSessionTagRatchet ();
GenerateMoreReceiveTags (newTagset, ECIESX25519_MAX_NUM_GENERATED_TAGS);
GenerateMoreReceiveTags (newTagset, (GetOwner () && GetOwner ()->GetNumRatchetInboundTags () > 0) ?
GetOwner ()->GetNumRatchetInboundTags () : ECIESX25519_MAX_NUM_GENERATED_TAGS);
receiveTagset->Expire ();
LogPrint (eLogDebug, "Garlic: next receive tagset ", tagsetID, " created");
}
@ -459,7 +460,8 @@ namespace garlic
m_SendTagset = std::make_shared<RatchetTagSet>(shared_from_this ());
m_SendTagset->DHInitialize (m_CK, keydata + 32); // tagset_ba = DH_INITIALIZE(chainKey, k_ba)
m_SendTagset->NextSessionTagRatchet ();
GenerateMoreReceiveTags (receiveTagset, ECIESX25519_MIN_NUM_GENERATED_TAGS);
GenerateMoreReceiveTags (receiveTagset, (GetOwner () && GetOwner ()->GetNumRatchetInboundTags () > 0) ?
GetOwner ()->GetNumRatchetInboundTags () : ECIESX25519_MIN_NUM_GENERATED_TAGS);
i2p::crypto::HKDF (keydata + 32, nullptr, 0, "AttachPayloadKDF", m_NSRKey, 32); // k = HKDF(k_ba, ZEROLEN, "AttachPayloadKDF", 32)
// encrypt payload
if (!i2p::crypto::AEADChaCha20Poly1305 (payload, len, m_H, 32, m_NSRKey, nonce, out + offset, len + 16, true)) // encrypt
@ -548,7 +550,8 @@ namespace garlic
auto receiveTagset = std::make_shared<RatchetTagSet>(shared_from_this ());
receiveTagset->DHInitialize (m_CK, keydata + 32); // tagset_ba = DH_INITIALIZE(chainKey, k_ba)
receiveTagset->NextSessionTagRatchet ();
GenerateMoreReceiveTags (receiveTagset, ECIESX25519_MIN_NUM_GENERATED_TAGS);
GenerateMoreReceiveTags (receiveTagset, (GetOwner () && GetOwner ()->GetNumRatchetInboundTags () > 0) ?
GetOwner ()->GetNumRatchetInboundTags () : ECIESX25519_MIN_NUM_GENERATED_TAGS);
}
i2p::crypto::HKDF (keydata + 32, nullptr, 0, "AttachPayloadKDF", keydata, 32); // k = HKDF(k_ba, ZEROLEN, "AttachPayloadKDF", 32)
// decrypt payload
@ -610,11 +613,23 @@ namespace garlic
return false;
}
HandlePayload (payload, len - 16, receiveTagset, index);
int moreTags = ECIESX25519_MIN_NUM_GENERATED_TAGS + (index >> 2); // N/4
if (moreTags > ECIESX25519_MAX_NUM_GENERATED_TAGS) moreTags = ECIESX25519_MAX_NUM_GENERATED_TAGS;
moreTags -= (receiveTagset->GetNextIndex () - index);
if (moreTags > 0 && GetOwner ())
GenerateMoreReceiveTags (receiveTagset, moreTags);
if (GetOwner ())
{
int moreTags = 0;
if (GetOwner ()->GetNumRatchetInboundTags () > 0) // override in settings?
{
if (receiveTagset->GetNextIndex () - index < GetOwner ()->GetNumRatchetInboundTags ()/2)
moreTags = GetOwner ()->GetNumRatchetInboundTags ();
}
else
{
moreTags = ECIESX25519_MIN_NUM_GENERATED_TAGS + (index >> 2); // N/4
if (moreTags > ECIESX25519_MAX_NUM_GENERATED_TAGS) moreTags = ECIESX25519_MAX_NUM_GENERATED_TAGS;
moreTags -= (receiveTagset->GetNextIndex () - index);
}
if (moreTags > 0)
GenerateMoreReceiveTags (receiveTagset, moreTags);
}
return true;
}

3
libi2pd/Garlic.cpp
View file

@ -432,7 +432,8 @@ namespace garlic
return ret;
}
GarlicDestination::GarlicDestination (): m_NumTags (32) // 32 tags by default
GarlicDestination::GarlicDestination (): m_NumTags (32), // 32 tags by default
m_NumRatchetInboundTags (0) // 0 means standard
{
m_Ctx = BN_CTX_new ();
}

3
libi2pd/Garlic.h
View file

@ -232,6 +232,8 @@ namespace garlic
void CleanUp ();
void SetNumTags (int numTags) { m_NumTags = numTags; };
int GetNumTags () const { return m_NumTags; };
void SetNumRatchetInboundTags (int numTags) { m_NumRatchetInboundTags = numTags; };
int GetNumRatchetInboundTags () const { return m_NumRatchetInboundTags; };
std::shared_ptr<GarlicRoutingSession> GetRoutingSession (std::shared_ptr<const i2p::data::RoutingDestination> destination, bool attachLeaseSet);
void CleanupExpiredTags ();
void RemoveDeliveryStatusSession (uint32_t msgID);
@ -278,6 +280,7 @@ namespace garlic
std::unordered_map<i2p::data::IdentHash, ElGamalAESSessionPtr> m_Sessions;
std::unordered_map<i2p::data::Tag<32>, ECIESX25519AEADRatchetSessionPtr> m_ECIESx25519Sessions; // static key -> session
// incoming
int m_NumRatchetInboundTags;
std::unordered_map<SessionTag, std::shared_ptr<AESDecryption>, std::hash<i2p::data::Tag<32> > > m_Tags;
std::unordered_map<uint64_t, ECIESX25519AEADRatchetIndexTagset> m_ECIESx25519Tags; // session tag -> session
// DeliveryStatus

2
libi2pd_client/ClientContext.cpp
View file

@ -461,6 +461,8 @@ namespace client
}
std::string explicitPeers = GetI2CPStringOption(section, I2CP_PARAM_EXPLICIT_PEERS, "");
if (explicitPeers.length () > 0) options[I2CP_PARAM_EXPLICIT_PEERS] = explicitPeers;
std::string ratchetInboundTags = GetI2CPStringOption(section, I2CP_PARAM_RATCHET_INBOUND_TAGS, "");
if (ratchetInboundTags.length () > 0) options[I2CP_PARAM_RATCHET_INBOUND_TAGS] = ratchetInboundTags;
}
void ClientContext::ReadI2CPOptionsFromConfig (const std::string& prefix, std::map<std::string, std::string>& options) const