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@ -19,12 +19,6 @@ namespace llarp
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LogDebug("link established with ", remoteAddr);
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}
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Crypto*
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Session::OurCrypto()
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{
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return parent->OurCrypto();
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}
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/// pump tx queue
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void
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Session::PumpWrite()
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@ -91,10 +85,11 @@ namespace llarp
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OutboundHandshake();
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}
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template < bool (Crypto::*dh_func)(SharedSecret&, const PubKey&,
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const SecretKey&, const TunnelNonce&) >
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bool
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Session::DoKeyExchange(transport_dh_func dh, SharedSecret& K,
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const KeyExchangeNonce& n, const PubKey& other,
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const SecretKey& secret)
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Session::DoKeyExchange(SharedSecret& K, const KeyExchangeNonce& n,
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const PubKey& other, const SecretKey& secret)
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{
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ShortHash t_h;
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static constexpr size_t TMP_SIZE = 64;
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@ -105,14 +100,14 @@ namespace llarp
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std::copy(K.begin(), K.end(), tmp.begin());
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std::copy(n.begin(), n.end(), tmp.begin() + K.size());
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// t_h = HS(K + L.n)
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if(!OurCrypto()->shorthash(t_h, llarp_buffer_t(tmp)))
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if(!CryptoManager::instance()->shorthash(t_h, llarp_buffer_t(tmp)))
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{
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LogError("failed to mix key to ", remoteAddr);
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return false;
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}
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// K = TKE(a.p, B_a.e, sk, t_h)
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if(!dh(K, other, secret, t_h))
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if(!(CryptoManager::instance()->*dh_func)(K, other, secret, t_h))
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{
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LogError("key exchange with ", other, " failed");
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return false;
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@ -130,7 +125,7 @@ namespace llarp
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buf.cur += K.size();
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std::copy(A.begin(), A.end(), buf.cur);
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buf.cur = buf.base;
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return OurCrypto()->shorthash(K, buf);
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return CryptoManager::instance()->shorthash(K, buf);
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}
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void
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@ -312,7 +307,7 @@ namespace llarp
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// build our RC
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LinkIntroMessage msg;
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msg.rc = parent->GetOurRC();
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if(!msg.rc.Verify(OurCrypto(), parent->Now()))
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if(!msg.rc.Verify(parent->Now()))
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{
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LogError("our RC is invalid? closing session to", remoteAddr);
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Close();
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@ -344,10 +339,8 @@ namespace llarp
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return;
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}
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if(!DoKeyExchange(std::bind(&Crypto::transport_dh_client, OurCrypto(), _1,
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_2, _3, _4),
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txKey, msg.N, remoteTransportPubKey,
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parent->RouterEncryptionSecret()))
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if(!DoClientKeyExchange(txKey, msg.N, remoteTransportPubKey,
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parent->RouterEncryptionSecret()))
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{
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LogError("failed to mix keys for outbound session to ", remoteAddr);
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|
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Close();
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@ -400,14 +393,14 @@ namespace llarp
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TunnelNonce nonce(noncePtr);
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|
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// encrypt
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if(!OurCrypto()->xchacha20(payload, txKey, nonce))
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if(!CryptoManager::instance()->xchacha20(payload, txKey, nonce))
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return false;
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|
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payload.base = noncePtr;
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|
|
payload.cur = payload.base;
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|
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payload.sz = FragmentBufferSize - FragmentHashSize;
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|
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// key'd hash
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|
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if(!OurCrypto()->hmac(buf.data(), payload, txKey))
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if(!CryptoManager::instance()->hmac(buf.data(), payload, txKey))
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|
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return false;
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|
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return MutateKey(txKey, A);
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|
|
}
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@ -449,9 +442,8 @@ namespace llarp
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|
|
// set remote rc
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|
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remoteRC = msg->rc;
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|
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// recalculate rx key
|
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|
|
|
return DoKeyExchange(
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|
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std::bind(&Crypto::transport_dh_server, OurCrypto(), _1, _2, _3, _4),
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|
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rxKey, msg->N, remoteRC.enckey, parent->RouterEncryptionSecret());
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|
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return DoServerKeyExchange(rxKey, msg->N, remoteRC.enckey,
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|
|
parent->RouterEncryptionSecret());
|
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|
|
|
}
|
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|
|
bool
|
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|
|
|
@ -475,9 +467,8 @@ namespace llarp
|
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|
|
if(!SendMessageBuffer(buf))
|
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|
|
|
return false;
|
|
|
|
|
// regen our tx Key
|
|
|
|
|
return DoKeyExchange(
|
|
|
|
|
std::bind(&Crypto::transport_dh_client, OurCrypto(), _1, _2, _3, _4),
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|
|
|
txKey, lim.N, remoteRC.enckey, parent->RouterEncryptionSecret());
|
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|
|
|
return DoClientKeyExchange(txKey, lim.N, remoteRC.enckey,
|
|
|
|
|
parent->RouterEncryptionSecret());
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool
|
|
|
|
|
@ -488,7 +479,7 @@ namespace llarp
|
|
|
|
|
|
|
|
|
|
llarp_buffer_t hbuf(ptr + FragmentHashSize,
|
|
|
|
|
FragmentBufferSize - FragmentHashSize);
|
|
|
|
|
if(!OurCrypto()->hmac(digest.data(), hbuf, rxKey))
|
|
|
|
|
if(!CryptoManager::instance()->hmac(digest.data(), hbuf, rxKey))
|
|
|
|
|
{
|
|
|
|
|
LogError("keyed hash failed");
|
|
|
|
|
return false;
|
|
|
|
|
@ -508,7 +499,8 @@ namespace llarp
|
|
|
|
|
llarp_buffer_t out(rxFragBody);
|
|
|
|
|
|
|
|
|
|
// decrypt
|
|
|
|
|
if(!OurCrypto()->xchacha20_alt(out, in, rxKey, ptr + FragmentHashSize))
|
|
|
|
|
if(!CryptoManager::instance()->xchacha20_alt(out, in, rxKey,
|
|
|
|
|
ptr + FragmentHashSize))
|
|
|
|
|
{
|
|
|
|
|
LogError("failed to decrypt message from ", remoteAddr);
|
|
|
|
|
return false;
|
|
|
|
|
@ -611,7 +603,7 @@ namespace llarp
|
|
|
|
|
sock = s;
|
|
|
|
|
remoteAddr = addr;
|
|
|
|
|
RouterID rid = p->GetOurRC().pubkey;
|
|
|
|
|
OurCrypto()->shorthash(rxKey, llarp_buffer_t(rid));
|
|
|
|
|
CryptoManager::instance()->shorthash(rxKey, llarp_buffer_t(rid));
|
|
|
|
|
remoteRC.Clear();
|
|
|
|
|
|
|
|
|
|
ABSL_ATTRIBUTE_UNUSED void* res = utp_set_userdata(sock, this);
|
|
|
|
|
@ -631,19 +623,18 @@ namespace llarp
|
|
|
|
|
if(!gotLIM)
|
|
|
|
|
{
|
|
|
|
|
remoteRC = msg->rc;
|
|
|
|
|
OurCrypto()->shorthash(txKey, llarp_buffer_t(remoteRC.pubkey));
|
|
|
|
|
CryptoManager::instance()->shorthash(txKey,
|
|
|
|
|
llarp_buffer_t(remoteRC.pubkey));
|
|
|
|
|
|
|
|
|
|
if(!DoKeyExchange(std::bind(&Crypto::transport_dh_server, OurCrypto(),
|
|
|
|
|
_1, _2, _3, _4),
|
|
|
|
|
rxKey, msg->N, remoteRC.enckey,
|
|
|
|
|
parent->TransportSecretKey()))
|
|
|
|
|
if(!DoServerKeyExchange(rxKey, msg->N, remoteRC.enckey,
|
|
|
|
|
parent->TransportSecretKey()))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
std::array< byte_t, LinkIntroMessage::MaxSize > tmp;
|
|
|
|
|
llarp_buffer_t buf(tmp);
|
|
|
|
|
LinkIntroMessage replymsg;
|
|
|
|
|
replymsg.rc = parent->GetOurRC();
|
|
|
|
|
if(!replymsg.rc.Verify(OurCrypto(), parent->Now()))
|
|
|
|
|
if(!replymsg.rc.Verify(parent->Now()))
|
|
|
|
|
{
|
|
|
|
|
LogError("our RC is invalid? closing session to", remoteAddr);
|
|
|
|
|
Close();
|
|
|
|
|
@ -675,10 +666,8 @@ namespace llarp
|
|
|
|
|
Close();
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
if(!DoKeyExchange(std::bind(&Crypto::transport_dh_client, OurCrypto(),
|
|
|
|
|
_1, _2, _3, _4),
|
|
|
|
|
txKey, replymsg.N, remoteRC.enckey,
|
|
|
|
|
parent->RouterEncryptionSecret()))
|
|
|
|
|
if(!DoClientKeyExchange(txKey, replymsg.N, remoteRC.enckey,
|
|
|
|
|
parent->RouterEncryptionSecret()))
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
LogDebug("Sent reply LIM");
|
|
|
|
|
@ -701,9 +690,9 @@ namespace llarp
|
|
|
|
|
remoteAddr = addr;
|
|
|
|
|
|
|
|
|
|
RouterID rid = remoteRC.pubkey;
|
|
|
|
|
OurCrypto()->shorthash(txKey, llarp_buffer_t(rid));
|
|
|
|
|
CryptoManager::instance()->shorthash(txKey, llarp_buffer_t(rid));
|
|
|
|
|
rid = p->GetOurRC().pubkey;
|
|
|
|
|
OurCrypto()->shorthash(rxKey, llarp_buffer_t(rid));
|
|
|
|
|
CryptoManager::instance()->shorthash(rxKey, llarp_buffer_t(rid));
|
|
|
|
|
|
|
|
|
|
ABSL_ATTRIBUTE_UNUSED void* res = utp_set_userdata(sock, this);
|
|
|
|
|
assert(res == this);
|
|
|
|
|
@ -729,10 +718,8 @@ namespace llarp
|
|
|
|
|
remoteRC = msg->rc;
|
|
|
|
|
gotLIM = true;
|
|
|
|
|
|
|
|
|
|
if(!DoKeyExchange(std::bind(&Crypto::transport_dh_server, OurCrypto(), _1,
|
|
|
|
|
_2, _3, _4),
|
|
|
|
|
rxKey, msg->N, remoteRC.enckey,
|
|
|
|
|
parent->RouterEncryptionSecret()))
|
|
|
|
|
if(!DoServerKeyExchange(rxKey, msg->N, remoteRC.enckey,
|
|
|
|
|
parent->RouterEncryptionSecret()))
|
|
|
|
|
{
|
|
|
|
|
Close();
|
|
|
|
|
return false;
|
|
|
|
|
|
Michael
5 years ago