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LS2 signature verification and store type

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orignal 2018-12-26 15:27:32 -05:00
parent 12af68bdb5
commit 6193b06708
3 changed files with 45 additions and 9 deletions
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40
libi2pd/LeaseSet.cpp
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@ -228,21 +228,51 @@ namespace data
memcpy (m_Buffer, buf, len);
}
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len)
{
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len):
m_StoreType (storeType)
{
SetBuffer (buf, len);
ReadFromBuffer (storeType, buf, len);
ReadFromBuffer (buf, len);
}
void LeaseSet2::ReadFromBuffer (uint8_t storeType, const uint8_t * buf, size_t len)
void LeaseSet2::ReadFromBuffer (const uint8_t * buf, size_t len)
{
auto identity = std::make_shared<IdentityEx>(buf, len);
SetIdentity (identity);
size_t offset = identity->GetFullLen ();
if (offset + 10 >= len) return;
uint32_t timestamp = bufbe32toh (buf + offset); offset += 4; // published timestamp (seconds)
uint16_t expires = bufbe16toh (buf + offset); offset += 2; // expires (seconds)
SetExpirationTime ((timestamp + expires)*1000LL); // in milliseconds
SetIsValid (true); // TODO:: verify signature
offset += 2; // flags
// properties
uint16_t propertiesLen = bufbe16toh (buf + offset); offset += 2;
offset += propertiesLen; // skip for now. TODO: implement properties
if (offset + 1 >= len) return;
// key sections
int numKeySections = buf[offset]; offset++;
for (int i = 0; i < numKeySections; i++)
{
// skip key for now. TODO: implement encryption key
offset += 2; // encryption key type
if (offset + 2 >= len) return;
uint16_t encryptionKeyLen = bufbe16toh (buf + offset); offset += 2;
offset += encryptionKeyLen;
if (offset >= len) return;
}
// leases
int numLeases = buf[offset]; offset++;
offset += numLeases*40; // 40 bytes each
// verify signature
if (offset + identity->GetSignatureLen () > len) return;
uint8_t * buf1 = new uint8_t[offset + 1];
buf1[0] = m_StoreType;
memcpy (buf1 + 1, buf, offset); // TODO: implement it better
bool verified = identity->Verify (buf1, offset + 1, buf + offset); // assume online keys
delete[] buf1;
if (!verified)
LogPrint (eLogWarning, "LeaseSet2: verification failed");
SetIsValid (verified);
}
LocalLeaseSet::LocalLeaseSet (std::shared_ptr<const IdentityEx> identity, const uint8_t * encryptionPublicKey, std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels):