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session tag for ECIESx25519 sessions

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orignal 2020-01-21 14:40:23 -05:00
parent ccec3376ba
commit 6142e93252
4 changed files with 79 additions and 28 deletions
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19
libi2pd/ECIESX25519AEADRatchetSession.h
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@ -4,6 +4,7 @@
#include <string.h>
#include <inttypes.h>
#include <functional>
#include <memory>
#include <vector>
#include "Identity.h"
#include "Crypto.h"
@ -19,11 +20,21 @@ namespace garlic
void DHInitialize (const uint8_t * rootKey, const uint8_t * k);
void NextSessionTagRatchet ();
const uint8_t * GetNextSessionTag ();
uint64_t GetNextSessionTag ();
private:
union
{
uint64_t ll[8];
uint8_t buf[64];
uint8_t m_CK[64], m_SessTagConstant[32];
const uint8_t * GetSessTagCK () const { return buf; }; // sessTag_chainKey = keydata[0:31]
const uint8_t * GetSessTagConstant () const { return buf + 32; }; // SESSTAG_CONSTANT = keydata[32:63]
uint64_t GetTag () const { return ll[4]; }; // tag = keydata[32:39]
} m_KeyData;
uint8_t m_SessTagConstant[32];
};
enum ECIESx25519BlockType
@ -37,7 +48,7 @@ namespace garlic
eECIESx25519BlkPadding = 254
};
class ECIESX25519AEADRatchetSession: public GarlicRoutingSession
class ECIESX25519AEADRatchetSession: public GarlicRoutingSession, public std::enable_shared_from_this<ECIESX25519AEADRatchetSession>
{
enum SessionState
{
@ -55,6 +66,7 @@ namespace garlic
std::shared_ptr<I2NPMessage> WrapSingleMessage (std::shared_ptr<const I2NPMessage> msg);
bool NewIncomingSession (const uint8_t * buf, size_t len, CloveHandler handleClove);
bool NewOutgoingSessionReply (const uint8_t * buf, size_t len, CloveHandler handleClove);
const uint8_t * GetRemoteStaticKey () const { return m_RemoteStaticKey; }
void SetRemoteStaticKey (const uint8_t * key) { memcpy (m_RemoteStaticKey, key, 32); }
@ -62,6 +74,7 @@ namespace garlic
void MixHash (const uint8_t * buf, size_t len);
bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes
uint64_t CreateNewSessionTag () const;
void HandlePayload (const uint8_t * buf, size_t len, CloveHandler& handleClove);