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TunnelDecryption for tunnels

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orignal 2014-05-15 18:58:26 -04:00
parent 7754968e7a
commit 0d51f240d0
3 changed files with 18 additions and 24 deletions
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28
Tunnel.cpp
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@ -51,14 +51,17 @@ namespace tunnel
i++;
hop = hop->next;
}
i2p::crypto::CBCDecryption decryption;
hop = m_Config->GetLastHop ()->prev;
size_t ind = numRecords - 1;
while (hop)
{
for (size_t i = ind; i < numRecords; i++)
hop->decryption.Decrypt((uint8_t *)&records[i],
sizeof (I2NPBuildRequestRecordElGamalEncrypted), (uint8_t *)&records[i]);
decryption.SetKey (hop->replyKey);
decryption.SetIV (hop->replyIV);
for (size_t i = ind; i < numRecords; i++)
decryption.Decrypt((uint8_t *)&records[i],
sizeof (I2NPBuildRequestRecordElGamalEncrypted), (uint8_t *)&records[i]);
hop = hop->prev;
ind--;
}
@ -74,14 +77,17 @@ namespace tunnel
{
LogPrint ("TunnelBuildResponse ", (int)msg[0], " records.");
i2p::crypto::CBCDecryption decryption;
TunnelHopConfig * hop = m_Config->GetLastHop ();
int num = msg[0];
while (hop)
{
decryption.SetKey (hop->replyKey);
decryption.SetIV (hop->replyIV);
for (int i = 0; i < num; i++)
{
uint8_t * record = msg + 1 + i*sizeof (I2NPBuildResponseRecord);
hop->decryption.Decrypt(record, sizeof (I2NPBuildResponseRecord), record);
decryption.Decrypt(record, sizeof (I2NPBuildResponseRecord), record);
}
hop = hop->prev;
num--;
@ -102,8 +108,7 @@ namespace tunnel
TunnelHopConfig * hop = m_Config->GetFirstHop ();
while (hop)
{
hop->decryption.SetKey (hop->layerKey);
hop->ivDecryption.SetKey (hop->ivKey);
hop->decryption.SetKeys (hop->layerKey, hop->ivKey);
hop = hop->next;
}
}
@ -116,14 +121,7 @@ namespace tunnel
TunnelHopConfig * hop = m_Config->GetLastHop ();
while (hop)
{
// iv
hop->ivDecryption.Decrypt ((i2p::crypto::ChipherBlock *)payload, (i2p::crypto::ChipherBlock *)payload);
// data
hop->decryption.SetIV (payload);
hop->decryption.Decrypt (payload + 16, TUNNEL_DATA_ENCRYPTED_SIZE, payload+16);
// double iv ecncryption
hop->ivDecryption.Decrypt ((i2p::crypto::ChipherBlock *)payload, (i2p::crypto::ChipherBlock *)payload);
hop->decryption.Decrypt (payload);
hop = hop->prev;
}
}