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tunnels through ECIES routers

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orignal 2020-10-23 15:53:22 -04:00
parent 57d6c7a3b3
commit c93ee0d65d
6 changed files with 137 additions and 39 deletions
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22
libi2pd/Tunnel.cpp
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@ -111,7 +111,7 @@ namespace tunnel
while (hop)
{
decryption.SetKey (hop->replyKey);
// decrypt records before and including current hop
// decrypt records before and current hop
TunnelHopConfig * hop1 = hop;
while (hop1)
{
@ -119,8 +119,22 @@ namespace tunnel
if (idx >= 0 && idx < msg[0])
{
uint8_t * record = msg + 1 + idx*TUNNEL_BUILD_RECORD_SIZE;
decryption.SetIV (hop->replyIV);
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
if (hop1 == hop && hop1->IsECIES ())
{
uint8_t nonce[12];
memset (nonce, 0, 12);
if (!i2p::crypto::AEADChaCha20Poly1305 (record, TUNNEL_BUILD_RECORD_SIZE - 16,
hop->h, 32, hop->ck, nonce, record, TUNNEL_BUILD_RECORD_SIZE - 16, false)) // decrypt
{
LogPrint (eLogWarning, "Tunnel: Response AEAD decryption failed");
return false;
}
}
else
{
decryption.SetIV (hop->replyIV);
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
}
}
else
LogPrint (eLogWarning, "Tunnel: hop index ", idx, " is out of range");
@ -134,7 +148,7 @@ namespace tunnel
while (hop)
{
const uint8_t * record = msg + 1 + hop->recordIndex*TUNNEL_BUILD_RECORD_SIZE;
uint8_t ret = record[BUILD_RESPONSE_RECORD_RET_OFFSET];
uint8_t ret = record[hop->IsECIES () ? ECIES_BUILD_RESPONSE_RECORD_RET_OFFSET : BUILD_RESPONSE_RECORD_RET_OFFSET];
LogPrint (eLogDebug, "Tunnel: Build response ret code=", (int)ret);
auto profile = i2p::data::netdb.FindRouterProfile (hop->ident->GetIdentHash ());
if (profile)