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@ -48,22 +48,27 @@ namespace tunnel
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hop->next ? rnd.GenerateWord32 () : replyMsgID, // we set replyMsgID for last hop only
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hop->isGateway, hop->isEndpoint),
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records[i]);
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hop->recordIndex = i; //TODO:
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i++;
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hop = hop->next;
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}
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i2p::crypto::CBCDecryption decryption;
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hop = m_Config->GetLastHop ()->prev;
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size_t ind = numRecords - 1;
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while (hop)
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{
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decryption.SetKey (hop->replyKey);
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decryption.SetIV (hop->replyIV);
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for (size_t i = ind; i < numRecords; i++)
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decryption.Decrypt((uint8_t *)&records[i],
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sizeof (I2NPBuildRequestRecordElGamalEncrypted), (uint8_t *)&records[i]);
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// decrypt records after current hop
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TunnelHopConfig * hop1 = hop->next;
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while (hop1)
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{
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decryption.Decrypt((uint8_t *)&records[hop1->recordIndex],
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sizeof (I2NPBuildRequestRecordElGamalEncrypted),
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(uint8_t *)&records[hop1->recordIndex]);
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hop1 = hop1->next;
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}
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hop = hop->prev;
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ind--;
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}
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FillI2NPMessageHeader (msg, eI2NPVariableTunnelBuild);
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@ -76,21 +81,28 @@ namespace tunnel
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bool Tunnel::HandleTunnelBuildResponse (uint8_t * msg, size_t len)
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{
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LogPrint ("TunnelBuildResponse ", (int)msg[0], " records.");
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auto numHops = m_Config->GetNumHops ();
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if (msg[0] != numHops)
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{
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LogPrint ("Number of records in response ", (int)msg[0], " doesn't match ", numHops);
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return false;
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}
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i2p::crypto::CBCDecryption decryption;
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TunnelHopConfig * hop = m_Config->GetLastHop ();
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int num = msg[0];
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while (hop)
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{
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decryption.SetKey (hop->replyKey);
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decryption.SetIV (hop->replyIV);
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for (int i = 0; i < num; i++)
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{
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uint8_t * record = msg + 1 + i*sizeof (I2NPBuildResponseRecord);
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// decrypt records before and including current hop
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TunnelHopConfig * hop1 = hop;
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while (hop1)
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{
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uint8_t * record = msg + 1 + hop1->recordIndex*sizeof (I2NPBuildResponseRecord);
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decryption.Decrypt(record, sizeof (I2NPBuildResponseRecord), record);
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}
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hop1 = hop1->prev;
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}
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hop = hop->prev;
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num--;
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}
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m_IsEstablished = true;
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