I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#include <cryptopp/dsa.h>
#include "CryptoConst.h"
#include "Log.h"
#include "LeaseSet.h"
#include "I2PEndian.h"
namespace i2p
{
namespace data
{
LeaseSet::LeaseSet (const uint8_t * buf, int len)
{
#pragma pack(1)
struct H
{
Identity destination;
uint8_t encryptionKey[256];
uint8_t signingKey[128];
uint8_t num;
};
#pragma pack ()
const H * header = (const H *)buf;
m_Identity = header->destination;
m_IdentHash = CalculateIdentHash (m_Identity);
memcpy (m_EncryptionKey, header->encryptionKey, 256);
LogPrint ("LeaseSet num=", (int)header->num);
const uint8_t * leases = buf + sizeof (H);
for (int i = 0; i < header->num; i++)
{
Lease lease = *(Lease *)leases;
lease.tunnelID = be32toh (lease.tunnelID);
m_Leases.push_back (lease);
leases += sizeof (Lease);
}
// verify
CryptoPP::DSA::PublicKey pubKey;
pubKey.Initialize (i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag,
CryptoPP::Integer (m_Identity.signingKey, 128));
CryptoPP::DSA::Verifier verifier (pubKey);
if (!verifier.VerifyMessage (buf, leases - buf, leases, 40))
LogPrint ("LeaseSet verification failed");
}
}
}