Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-01-22 21:37:17 +01:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

try another ephemeral keys if elligator encoding failes

Browse source
This commit is contained in:
orignal 2020-01-21 12:19:20 -05:00
parent f497a74ec4
commit ccec3376ba
2 changed files with 15 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
libi2pd/ECIESX25519AEADRatchetSession.cpp
View file

@ -58,6 +58,17 @@ namespace garlic
SHA256_Final (m_H, &ctx);
}
bool ECIESX25519AEADRatchetSession::GenerateEphemeralKeysAndEncode (uint8_t * buf)
{
for (int i = 0; i < 5; i++)
{
m_EphemeralKeys.GenerateKeys ();
if (i2p::crypto::GetElligator ()->Encode (m_EphemeralKeys.GetPublicKey (), buf))
return true; // success
}
return false;
}
bool ECIESX25519AEADRatchetSession::NewIncomingSession (const uint8_t * buf, size_t len, CloveHandler handleClove)
{
if (!GetOwner ()) return false;
@ -152,11 +163,10 @@ namespace garlic
}
bool ECIESX25519AEADRatchetSession::NewOutgoingSessionMessage (const uint8_t * payload, size_t len, uint8_t * out, size_t outLen)
{
m_EphemeralKeys.GenerateKeys ();
{
// we are Alice, bpk is m_RemoteStaticKey
size_t offset = 0;
if (!i2p::crypto::GetElligator ()->Encode (m_EphemeralKeys.GetPublicKey (), out + offset))
if (!GenerateEphemeralKeysAndEncode (out + offset))
{
LogPrint (eLogError, "Garlic: Can't encode elligator");
return false;
@ -195,7 +205,6 @@ namespace garlic
bool ECIESX25519AEADRatchetSession::NewSessionReplyMessage (const uint8_t * payload, size_t len, uint8_t * out, size_t outLen)
{
m_EphemeralKeys.GenerateKeys ();
// we are Bob
uint8_t tagsetKey[32];
i2p::crypto::HKDF (m_CK, nullptr, 0, "SessionReplyTags", tagsetKey, 32); // tagsetKey = HKDF(chainKey, ZEROLEN, "SessionReplyTags", 32)
@ -209,7 +218,7 @@ namespace garlic
size_t offset = 0;
memcpy (out + offset, tag, 8);
offset += 8;
if (!i2p::crypto::GetElligator ()->Encode (m_EphemeralKeys.GetPublicKey (), out + offset)) // bepk
if (!GenerateEphemeralKeysAndEncode (out + offset)) // bepk
{
LogPrint (eLogError, "Garlic: Can't encode elligator");
return false;

1
libi2pd/ECIESX25519AEADRatchetSession.h
View file

@ -61,6 +61,7 @@ namespace garlic
private:
void MixHash (const uint8_t * buf, size_t len);
bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes
void HandlePayload (const uint8_t * buf, size_t len, CloveHandler& handleClove);