PurpleI2P/i2pd
1
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-01-22 08:14:15 +00:00
Code Issues Releases Activity

one-time aes garlic encryption

Browse Source
This commit is contained in:
orignal 2014-07-28 11:54:34 -04:00
parent e77f625814
commit 750d6fbaed
2 changed files with 26 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
Garlic.cpp
View File

@ -14,7 +14,7 @@ namespace i2p
{ {
namespace garlic namespace garlic
{ {
GarlicRoutingSession::GarlicRoutingSession (const i2p::data::RoutingDestination& destination, int numTags): GarlicRoutingSession::GarlicRoutingSession (const i2p::data::RoutingDestination * destination, int numTags):
m_Destination (destination), m_FirstMsgID (0), m_IsAcknowledged (false), m_Destination (destination), m_FirstMsgID (0), m_IsAcknowledged (false),
m_NumTags (numTags), m_NextTag (-1), m_SessionTags (0), m_TagsCreationTime (0) m_NumTags (numTags), m_NextTag (-1), m_SessionTags (0), m_TagsCreationTime (0)
{ {
@ -30,6 +30,16 @@ namespace garlic
m_SessionTags = nullptr; m_SessionTags = nullptr;
} }
GarlicRoutingSession::GarlicRoutingSession (const uint8_t * sessionKey, const uint8_t * sessionTag):
m_Destination (nullptr), m_FirstMsgID (0), m_IsAcknowledged (true), m_NumTags (1), m_NextTag (0)
{
memcpy (m_SessionKey, sessionKey, 32);
m_Encryption.SetKey (m_SessionKey);
m_SessionTags = new uint8_t[1]; // 1 tag
memcpy (m_SessionTags, sessionTag, 32);
m_TagsCreationTime = i2p::util::GetSecondsSinceEpoch ();
}
GarlicRoutingSession::~GarlicRoutingSession () GarlicRoutingSession::~GarlicRoutingSession ()
{ {
delete[] m_SessionTags; delete[] m_SessionTags;
@ -71,13 +81,18 @@ namespace garlic
// create message // create message
if (m_NextTag < 0 || !m_NumTags) // new session if (m_NextTag < 0 || !m_NumTags) // new session
{ {
if (!m_Destination)
{
LogPrint ("Can't use ElGamal for unknown destination");
return nullptr;
}
// create ElGamal block // create ElGamal block
ElGamalBlock elGamal; ElGamalBlock elGamal;
memcpy (elGamal.sessionKey, m_SessionKey, 32); memcpy (elGamal.sessionKey, m_SessionKey, 32);
m_Rnd.GenerateBlock (elGamal.preIV, 32); // Pre-IV m_Rnd.GenerateBlock (elGamal.preIV, 32); // Pre-IV
uint8_t iv[32]; // IV is first 16 bytes uint8_t iv[32]; // IV is first 16 bytes
CryptoPP::SHA256().CalculateDigest(iv, elGamal.preIV, 32); CryptoPP::SHA256().CalculateDigest(iv, elGamal.preIV, 32);
m_Destination.GetElGamalEncryption ()->Encrypt ((uint8_t *)&elGamal, sizeof(elGamal), buf, true); m_Destination->GetElGamalEncryption ()->Encrypt ((uint8_t *)&elGamal, sizeof(elGamal), buf, true);
m_Encryption.SetIV (iv); m_Encryption.SetIV (iv);
buf += 514; buf += 514;
len += 514; len += 514;
@ -161,7 +176,7 @@ namespace garlic
} }
if (msg) // clove message ifself if presented if (msg) // clove message ifself if presented
{ {
size += CreateGarlicClove (payload + size, msg, m_Destination.IsDestination ()); size += CreateGarlicClove (payload + size, msg, m_Destination ? m_Destination->IsDestination () : false);
(*numCloves)++; (*numCloves)++;
} }
@ -178,11 +193,11 @@ namespace garlic
{ {
uint64_t ts = i2p::util::GetMillisecondsSinceEpoch () + 5000; // 5 sec uint64_t ts = i2p::util::GetMillisecondsSinceEpoch () + 5000; // 5 sec
size_t size = 0; size_t size = 0;
if (isDestination) if (isDestination && m_Destination)
{ {
buf[size] = eGarlicDeliveryTypeDestination << 5;// delivery instructions flag destination buf[size] = eGarlicDeliveryTypeDestination << 5;// delivery instructions flag destination
size++; size++;
memcpy (buf + size, m_Destination.GetIdentHash (), 32); memcpy (buf + size, m_Destination->GetIdentHash (), 32);
size += 32; size += 32;
} }
else else
@ -269,7 +284,7 @@ namespace garlic
delete it->second; delete it->second;
m_Sessions.erase (it); m_Sessions.erase (it);
} }
GarlicRoutingSession * session = new GarlicRoutingSession (destination, 0); // not follow-on messages expected GarlicRoutingSession * session = new GarlicRoutingSession (&destination, 0); // not follow-on messages expected
m_Sessions[destination.GetIdentHash ()] = session; m_Sessions[destination.GetIdentHash ()] = session;
return session->WrapSingleMessage (msg, nullptr); return session->WrapSingleMessage (msg, nullptr);
@ -284,7 +299,7 @@ namespace garlic
session = it->second; session = it->second;
if (!session) if (!session)
{ {
session = new GarlicRoutingSession (destination, 32); session = new GarlicRoutingSession (&destination, 32);
m_Sessions[destination.GetIdentHash ()] = session; m_Sessions[destination.GetIdentHash ()] = session;
} }

6
Garlic.h
View File

@ -36,11 +36,13 @@ namespace garlic
#pragma pack() #pragma pack()
const int TAGS_EXPIRATION_TIMEOUT = 900; // 15 minutes const int TAGS_EXPIRATION_TIMEOUT = 900; // 15 minutes
class GarlicRoutingSession class GarlicRoutingSession
{ {
public: public:
GarlicRoutingSession (const i2p::data::RoutingDestination& destination, int numTags); GarlicRoutingSession (const i2p::data::RoutingDestination * destination, int numTags);
GarlicRoutingSession (const uint8_t * sessionKey, const uint8_t * sessionTag); // one time encryption
~GarlicRoutingSession (); ~GarlicRoutingSession ();
I2NPMessage * WrapSingleMessage (I2NPMessage * msg, const I2NPMessage * leaseSet); I2NPMessage * WrapSingleMessage (I2NPMessage * msg, const I2NPMessage * leaseSet);
int GetNextTag () const { return m_NextTag; }; int GetNextTag () const { return m_NextTag; };
@ -60,7 +62,7 @@ namespace garlic
private: private:
const i2p::data::RoutingDestination& m_Destination; const i2p::data::RoutingDestination * m_Destination;
uint8_t m_SessionKey[32]; uint8_t m_SessionKey[32];
uint32_t m_FirstMsgID; // first message ID uint32_t m_FirstMsgID; // first message ID
bool m_IsAcknowledged; bool m_IsAcknowledged;