mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd synced 2024-11-10 00:00:29 +03:00
Code Issues Packages Projects Releases Wiki Activity

correct timestamp check for LeaseSet2

Browse Source
This commit is contained in:
orignal 2020-04-29 17:11:48 -04:00
parent 16b992d705
commit 627d8cfe69
2 changed files with 28 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
libi2pd/LeaseSet.cpp
View File

@ -149,20 +149,13 @@ namespace data
auto ret = m_Leases.insert (std::make_shared<Lease>(lease));
if (!ret.second) (*ret.first)->endDate = lease.endDate; // update existing
(*ret.first)->isUpdated = true;
// check if lease's gateway is in our netDb
if (!netdb.FindRouter (lease.tunnelGateway))
{
// if not found request it
LogPrint (eLogInfo, "LeaseSet: Lease's tunnel gateway not found, requesting");
netdb.RequestDestination (lease.tunnelGateway);
}
}
}
else
LogPrint (eLogWarning, "LeaseSet: Lease is expired already");
}
uint64_t LeaseSet::ExtractTimestamp (const uint8_t * buf, size_t len) const
uint64_t LeaseSet::ExtractExpirationTimestamp (const uint8_t * buf, size_t len) const
{
if (!m_Identity) return 0;
size_t size = m_Identity->GetFullLen ();
@ -187,7 +180,7 @@ namespace data
bool LeaseSet::IsNewer (const uint8_t * buf, size_t len) const
{
return ExtractTimestamp (buf, len) > ExtractTimestamp (m_Buffer, m_BufferLen);
return ExtractExpirationTimestamp (buf, len) > (m_ExpirationTime ? m_ExpirationTime : ExtractExpirationTimestamp (m_Buffer, m_BufferLen));
}
bool LeaseSet::ExpiresSoon(const uint64_t dlt, const uint64_t fudge) const
@ -283,6 +276,12 @@ namespace data
// TODO: implement encrypted
}
bool LeaseSet2::IsNewer (const uint8_t * buf, size_t len) const
{
uint64_t expiration;
return ExtractPublishedTimestamp (buf, len, expiration) > m_PublishedTimestamp;
}
void LeaseSet2::ReadFromBuffer (const uint8_t * buf, size_t len, bool readIdentity, bool verifySignature)
{
// standard LS2 header
@ -640,7 +639,14 @@ namespace data
encryptor->Encrypt (data, encrypted, ctx, true);
}
uint64_t LeaseSet2::ExtractTimestamp (const uint8_t * buf, size_t len) const
uint64_t LeaseSet2::ExtractExpirationTimestamp (const uint8_t * buf, size_t len) const
{
uint64_t expiration = 0;
ExtractPublishedTimestamp (buf, len, expiration);
return expiration;
}
uint64_t LeaseSet2::ExtractPublishedTimestamp (const uint8_t * buf, size_t len, uint64_t& expiration) const
{
if (len < 8) return 0;
if (m_StoreType == NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
@ -655,7 +661,8 @@ namespace data
offset += blindedKeyLen;
uint32_t timestamp = bufbe32toh (buf + offset); offset += 4;
uint16_t expires = bufbe16toh (buf + offset); offset += 2;
return (timestamp + expires)* 1000LL;
expiration = (timestamp + expires)* 1000LL;
return timestamp;
}
else
{
@ -665,7 +672,8 @@ namespace data
if (offset + 6 >= len) return 0;
uint32_t timestamp = bufbe32toh (buf + offset); offset += 4;
uint16_t expires = bufbe16toh (buf + offset); offset += 2;
return (timestamp + expires)* 1000LL;
expiration = (timestamp + expires)* 1000LL;
return timestamp;
}
}

8
libi2pd/LeaseSet.h
View File

@ -63,7 +63,7 @@ namespace data
LeaseSet (const uint8_t * buf, size_t len, bool storeLeases = true);
virtual ~LeaseSet () { delete[] m_EncryptionKey; delete[] m_Buffer; };
virtual void Update (const uint8_t * buf, size_t len, bool verifySignature = true);
bool IsNewer (const uint8_t * buf, size_t len) const;
virtual bool IsNewer (const uint8_t * buf, size_t len) const;
void PopulateLeases (); // from buffer
const uint8_t * GetBuffer () const { return m_Buffer; };
@ -106,7 +106,7 @@ namespace data
private:
void ReadFromBuffer (bool readIdentity = true, bool verifySignature = true);
virtual uint64_t ExtractTimestamp (const uint8_t * buf, size_t len) const; // returns max expiration time
virtual uint64_t ExtractExpirationTimestamp (const uint8_t * buf, size_t len) const; // returns max expiration time
private:
@ -145,6 +145,7 @@ namespace data
bool IsPublishedEncrypted () const { return m_IsPublishedEncrypted; };
std::shared_ptr<const i2p::crypto::Verifier> GetTransientVerifier () const { return m_TransientVerifier; };
void Update (const uint8_t * buf, size_t len, bool verifySignature);
bool IsNewer (const uint8_t * buf, size_t len) const;
// implements RoutingDestination
void Encrypt (const uint8_t * data, uint8_t * encrypted, BN_CTX * ctx) const;
@ -160,7 +161,8 @@ namespace data
template<typename Verifier>
bool VerifySignature (Verifier& verifier, const uint8_t * buf, size_t len, size_t signatureOffset);
uint64_t ExtractTimestamp (const uint8_t * buf, size_t len) const;
uint64_t ExtractExpirationTimestamp (const uint8_t * buf, size_t len) const;
uint64_t ExtractPublishedTimestamp (const uint8_t * buf, size_t len, uint64_t& expiration) const;
size_t ExtractClientAuthData (const uint8_t * buf, size_t len, const uint8_t * secret, const uint8_t * subcredential, uint8_t * authCookie) const; // subcredential is subcredential + timestamp, return length of autData without flag
private: