void DatagramDestination::HandleDatagram(
uint16_t fromPort,
uint16_t toPort,
const uint8_t* buf,
size_t len) {
i2p::data::IdentityEx identity;
size_t identityLen = identity.FromBuffer(buf, len);
const uint8_t* signature = buf + identityLen;
size_t headerLen = identityLen + identity.GetSignatureLen();
bool verified = false;
if (identity.GetSigningKeyType() == i2p::data::SIGNING_KEY_TYPE_DSA_SHA1) {
uint8_t hash[32];
i2p::crypto::SHA256().CalculateDigest(hash, buf + headerLen, len - headerLen);
verified = identity.Verify(hash, 32, signature);
} else {
verified =
identity.Verify(buf + headerLen, len - headerLen, signature);
}
if (verified) {
auto it = m_ReceiversByPorts.find(toPort);
if (it != m_ReceiversByPorts.end())
it->second(
identity, fromPort, toPort, buf + headerLen, len - headerLen);
else if (m_Receiver != nullptr)
m_Receiver(
identity, fromPort, toPort, buf + headerLen, len - headerLen);
else
LogPrint(eLogWarn,
"DatagramDestination: receiver for datagram is not set");
} else {
LogPrint(eLogWarn,
"DatagramDestination: datagram signature verification failed");
}
}
void DatagramDestination::HandleDatagram (const uint8_t * buf, size_t len)
{
i2p::data::IdentityEx identity;
size_t identityLen = identity.FromBuffer (buf, len);
const uint8_t * signature = buf + identityLen;
size_t headerLen = identityLen + identity.GetSignatureLen ();
bool verified = false;
if (identity.GetSigningKeyType () == i2p::data::SIGNING_KEY_TYPE_DSA_SHA1)
{
uint8_t hash[32];
CryptoPP::SHA256().CalculateDigest (hash, buf + headerLen, len - headerLen);
verified = identity.Verify (hash, 32, signature);
}
else
verified = identity.Verify (buf + headerLen, len - headerLen, signature);
if (verified)
{
if (m_Receiver != nullptr)
m_Receiver (identity, buf + headerLen, len -headerLen);
else
LogPrint (eLogWarning, "Receiver for datagram is not set");
}
else
LogPrint (eLogWarning, "Datagram signature verification failed");
}
