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Code Issues Releases Activity

use SessionTag

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This commit is contained in:
orignal 2014-07-28 12:02:50 -04:00
parent 750d6fbaed
commit b1c2ba53d1
2 changed files with 15 additions and 12 deletions
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21
Garlic.cpp
View File

@ -23,20 +23,20 @@ namespace garlic
m_Encryption.SetKey (m_SessionKey);
if (m_NumTags > 0)
{
m_SessionTags = new uint8_t[m_NumTags*32];
m_SessionTags = new SessionTag[m_NumTags];
GenerateSessionTags ();
}
else
m_SessionTags = nullptr;
}
GarlicRoutingSession::GarlicRoutingSession (const uint8_t * sessionKey, const uint8_t * sessionTag):
GarlicRoutingSession::GarlicRoutingSession (const uint8_t * sessionKey, const SessionTag& 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_SessionTags = new SessionTag[1]; // 1 tag
m_SessionTags[0] = sessionTag;
m_TagsCreationTime = i2p::util::GetSecondsSinceEpoch ();
}
@ -50,7 +50,7 @@ namespace garlic
if (m_SessionTags)
{
for (int i = 0; i < m_NumTags; i++)
m_Rnd.GenerateBlock (m_SessionTags + i*32, 32);
m_Rnd.GenerateBlock (m_SessionTags[i], 32);
m_TagsCreationTime = i2p::util::GetSecondsSinceEpoch ();
SetAcknowledged (false);
}
@ -100,9 +100,9 @@ namespace garlic
else // existing session
{
// session tag
memcpy (buf, m_SessionTags + m_NextTag*32, 32);
memcpy (buf, m_SessionTags[m_NextTag], 32);
uint8_t iv[32]; // IV is first 16 bytes
CryptoPP::SHA256().CalculateDigest(iv, m_SessionTags + m_NextTag*32, 32);
CryptoPP::SHA256().CalculateDigest(iv, m_SessionTags[m_NextTag], 32);
m_Encryption.SetIV (iv);
buf += 32;
len += 32;
@ -132,8 +132,11 @@ namespace garlic
blockSize += 2;
if (m_NextTag < 0) // session tags recreated
{
memcpy (buf + blockSize, m_SessionTags, m_NumTags*32); // tags
blockSize += m_NumTags*32;
for (int i = 0; i < m_NumTags; i++)
{
memcpy (buf + blockSize, m_SessionTags[i], 32); // tags
blockSize += 32;
}
}
uint32_t * payloadSize = (uint32_t *)(buf + blockSize);
blockSize += 4;

6
Garlic.h
View File

@ -37,12 +37,13 @@ namespace garlic
const int TAGS_EXPIRATION_TIMEOUT = 900; // 15 minutes
typedef i2p::data::Tag<32> SessionTag;
class GarlicRoutingSession
{
public:
GarlicRoutingSession (const i2p::data::RoutingDestination * destination, int numTags);
GarlicRoutingSession (const uint8_t * sessionKey, const uint8_t * sessionTag); // one time encryption
GarlicRoutingSession (const uint8_t * sessionKey, const SessionTag& sessionTag); // one time encryption
~GarlicRoutingSession ();
I2NPMessage * WrapSingleMessage (I2NPMessage * msg, const I2NPMessage * leaseSet);
int GetNextTag () const { return m_NextTag; };
@ -67,7 +68,7 @@ namespace garlic
uint32_t m_FirstMsgID; // first message ID
bool m_IsAcknowledged;
int m_NumTags, m_NextTag;
uint8_t * m_SessionTags; // m_NumTags*32 bytes
SessionTag * m_SessionTags; // m_NumTags*32 bytes
uint32_t m_TagsCreationTime; // seconds since epoch
i2p::crypto::CBCEncryption m_Encryption;
@ -76,7 +77,6 @@ namespace garlic
class GarlicRouting
{
typedef i2p::data::Tag<32> SessionTag;
class SessionDecryption: public i2p::crypto::CBCDecryption
{
public: