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Code Issues Releases Activity

reset keys

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orignal 2020-01-22 21:42:30 -05:00
parent 34295adb05
commit 205e807b66
2 changed files with 15 additions and 7 deletions
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21
libi2pd/ECIESX25519AEADRatchetSession.cpp
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@ -38,17 +38,22 @@ namespace garlic
ECIESX25519AEADRatchetSession::ECIESX25519AEADRatchetSession (GarlicDestination * owner): ECIESX25519AEADRatchetSession::ECIESX25519AEADRatchetSession (GarlicDestination * owner):
GarlicRoutingSession (owner, true) GarlicRoutingSession (owner, true)
{ {
// TODO : use precalculated hashes ResetKeys ();
static const char protocolName[41] = "Noise_IKelg2+hs2_25519_ChaChaPoly_SHA256"; // 40 bytes
SHA256 ((const uint8_t *)protocolName, 40, m_H);
memcpy (m_CK, m_H, 32);
SHA256 (m_H, 32, m_H);
} }
ECIESX25519AEADRatchetSession::~ECIESX25519AEADRatchetSession () ECIESX25519AEADRatchetSession::~ECIESX25519AEADRatchetSession ()
{ {
} }
void ECIESX25519AEADRatchetSession::ResetKeys ()
{
// TODO : use precalculated hashes
static const char protocolName[41] = "Noise_IKelg2+hs2_25519_ChaChaPoly_SHA256"; // 40 bytes
SHA256 ((const uint8_t *)protocolName, 40, m_H);
memcpy (m_CK, m_H, 32);
SHA256 (m_H, 32, m_H);
}
void ECIESX25519AEADRatchetSession::MixHash (const uint8_t * buf, size_t len) void ECIESX25519AEADRatchetSession::MixHash (const uint8_t * buf, size_t len)
{ {
SHA256_CTX ctx; SHA256_CTX ctx;
@ -175,6 +180,7 @@ namespace garlic
bool ECIESX25519AEADRatchetSession::NewOutgoingSessionMessage (const uint8_t * payload, size_t len, uint8_t * out, size_t outLen) bool ECIESX25519AEADRatchetSession::NewOutgoingSessionMessage (const uint8_t * payload, size_t len, uint8_t * out, size_t outLen)
{ {
ResetKeys ();
// we are Alice, bpk is m_RemoteStaticKey // we are Alice, bpk is m_RemoteStaticKey
size_t offset = 0; size_t offset = 0;
if (!GenerateEphemeralKeysAndEncode (out + offset)) if (!GenerateEphemeralKeysAndEncode (out + offset))
@ -266,7 +272,8 @@ namespace garlic
bool ECIESX25519AEADRatchetSession::NewOutgoingSessionReply (const uint8_t * buf, size_t len, CloveHandler handleClove) bool ECIESX25519AEADRatchetSession::NewOutgoingSessionReply (const uint8_t * buf, size_t len, CloveHandler handleClove)
{ {
// TODO // TODO
LogPrint (eLogDebug, "Garlic: reply received");
return true; return true;
} }
@ -303,7 +310,7 @@ namespace garlic
std::vector<uint8_t> ECIESX25519AEADRatchetSession::CreatePayload (std::shared_ptr<const I2NPMessage> msg) std::vector<uint8_t> ECIESX25519AEADRatchetSession::CreatePayload (std::shared_ptr<const I2NPMessage> msg)
{ {
size_t payloadLen = 0; size_t payloadLen = 0;
if (payloadLen) if (msg)
payloadLen += msg->GetPayloadLength () + 13; payloadLen += msg->GetPayloadLength () + 13;
auto leaseSet = CreateDatabaseStoreMsg (GetOwner ()->GetLeaseSet ()); auto leaseSet = CreateDatabaseStoreMsg (GetOwner ()->GetLeaseSet ());
if (leaseSet) if (leaseSet)

1
libi2pd/ECIESX25519AEADRatchetSession.h
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@ -72,6 +72,7 @@ namespace garlic
private: private:
void ResetKeys ();
void MixHash (const uint8_t * buf, size_t len); void MixHash (const uint8_t * buf, size_t len);
bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes
uint64_t CreateNewSessionTag () const; uint64_t CreateNewSessionTag () const;