more refactor and features (hmac collection)

This commit is contained in:
Green Sky 2024-08-06 00:42:54 +02:00
parent 0a0fb18527
commit 107b9bf59f
No known key found for this signature in database
3 changed files with 253 additions and 23 deletions

View File

@ -75,16 +75,16 @@ namespace P2PRNG::Events {
struct HMAC {
const ByteSpan id;
int32_t have;
int32_t out_of;
uint16_t have;
uint16_t out_of;
};
// received a secret (or own, when first)
struct Secret {
const ByteSpan id;
int32_t have;
int32_t out_of;
uint16_t have;
uint16_t out_of;
};
struct Done {

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@ -7,12 +7,15 @@
#include <iostream>
#include <vector>
// https://soundcloud.com/deadcrxw/glom-glass-deadcrow-flip-free-download
// packets:
//
// init_with_hmac
// - id
// - peerlist (includes sender, determines fusion order)
// - sender hmac
// - is
//
// hmac
// - id
@ -246,21 +249,159 @@ bool ToxP2PRNG::handleGroupPacket(
return handlePacket(c, tpr_pkg_type, {data.ptr+2, data.size-2});
}
bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet INIT_WITH_HMAC\n";
size_t curser = 0;
return false;
}
bool ToxP2PRNG::handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
bool ToxP2PRNG::handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet HMAC\n";
size_t curser = 0;
if (data.size < P2PRNG_MAC_LEN) {
std::cerr << "TP2PRNG error: HMAC missing from HMAC\n";
return false;
}
bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
ByteSpan hmac {data.ptr, P2PRNG_MAC_LEN};
if (data.size > hmac.size) {
std::cerr << "TP2PRNG warning: HMAC pkg has extra data!\n";
}
auto* rng_state = getRngSate(c, id);
if (rng_state == nullptr) {
return false;
}
// check if preexisting (do nothing)
auto hmac_it = rng_state->hmacs.find(c);
if (hmac_it == rng_state->hmacs.cend()) {
// preexisting
return false;
}
// add and do events
auto& hmac_record = rng_state->hmacs[c];
for (size_t i = 0; i < P2PRNG_MAC_LEN; i++) {
hmac_record[i] = hmac[i];
}
// fire update event
dispatch(
P2PRNG_Event::hmac,
P2PRNG::Events::HMAC{
id,
static_cast<uint16_t>(rng_state->hmacs.size()),
static_cast<uint16_t>(rng_state->contacts.size()),
}
);
if (rng_state->hmacs.size() != rng_state->contacts.size()) {
// dont have all hmacs yet
return true;
}
// have all hmacs !
// now we send out our secret and collect secrets
// we should also validate any secret that already is in storage
// TODO: move somewhere else
// validate existing (self should be good)
std::vector<Contact3> bad_secrets;
for (const auto& [pre_c, secret] : rng_state->secrets) {
const auto& pre_hmac = rng_state->hmacs.at(pre_c);
if (p2prng_auth_verify(secret.data()+P2PRNG_LEN, pre_hmac.data(), secret.data(), P2PRNG_LEN) != 0) {
// bad secret
std::cerr
<< "########################################\n"
<< "TP2PRNG error: bad secret, validation failed!\n"
<< "########################################\n"
;
bad_secrets.push_back(pre_c);
dispatch(
P2PRNG_Event::val_error,
P2PRNG::Events::ValError{
id,
pre_c,
}
);
}
}
for (const auto bad_c : bad_secrets) {
rng_state->secrets.erase(bad_c);
}
// find self contact
// TODO: accel
// TODO: do TagSelfStrong over contacts instead?? probably. maybe additionally
Contact3Handle self;
if (c.all_of<Contact::Components::Self>()) {
self = Contact3Handle{*c.registry(), c.get<Contact::Components::Self>().self};
} else if (c.all_of<Contact::Components::Parent>()) {
Contact3Handle parent = {*c.registry(), c.get<Contact::Components::Parent>().parent};
if (static_cast<bool>(parent) && parent.all_of<Contact::Components::Self>()) {
self = Contact3Handle{*c.registry(), parent.get<Contact::Components::Self>().self};
}
}
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to look up self\n";
return false;
}
auto self_secret_it = rng_state->secrets.find(self);
if (self_secret_it == rng_state->secrets.cend()) {
// hmmmmmmmmmm this bad
std::cerr << "hmmmmmmmmmm this bad\n";
return false;
}
// fire update event
dispatch(
P2PRNG_Event::secret,
P2PRNG::Events::Secret{
id,
static_cast<uint16_t>(rng_state->secrets.size()),
static_cast<uint16_t>(rng_state->contacts.size()),
}
);
// TODO: queue these instead
for (const auto peer : rng_state->contacts) {
send_secret(peer, id, ByteSpan{self_secret_it->second});
}
// :) now the funky part
// what if we also already have all secrets (a single hmac was the hold up)
if (rng_state->secrets.size() != rng_state->contacts.size()) {
// dont have all secrets yet
return true;
}
// have also all secrets o.O
rng_state->genFinalResult();
if (rng_state->final_result.empty()) {
std::cerr << "oh no, oh god\n";
return true;
}
// fire done event
dispatch(
P2PRNG_Event::done,
P2PRNG::Events::Done{
id,
ByteSpan{rng_state->final_result},
}
);
return true;
}
bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet HMAC_REQUEST\n";
if (!data.empty()) {
@ -272,17 +413,46 @@ bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data
return false;
}
// no state check necessary
// find self contact
// TODO: accel
// TODO: do TagSelfStrong over contacts instead?? probably. maybe additionally
Contact3Handle self;
if (c.all_of<Contact::Components::Self>()) {
self = Contact3Handle{*c.registry(), c.get<Contact::Components::Self>().self};
} else if (c.all_of<Contact::Components::Parent>()) {
Contact3Handle parent = {*c.registry(), c.get<Contact::Components::Parent>().parent};
if (static_cast<bool>(parent) && parent.all_of<Contact::Components::Self>()) {
self = Contact3Handle{*c.registry(), parent.get<Contact::Components::Self>().self};
}
}
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to look up self\n";
return false;
}
bool ToxP2PRNG::handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data) {
auto self_hmac_it = rng_state->hmacs.find(self);
if (self_hmac_it == rng_state->hmacs.cend()) {
// hmmmmmmmmmm this bad
std::cerr << "hmmmmmmmmmm this bad\n";
return false;
}
// TODO: queue these instead
send_hmac(c, id, ByteSpan{self_hmac_it->second});
return false;
}
bool ToxP2PRNG::handle_secret(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet SECRET\n";
size_t curser = 0;
return false;
}
bool ToxP2PRNG::handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
bool ToxP2PRNG::handle_secret_request(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet SECRET_REQUEST\n";
if (!data.empty()) {
@ -380,6 +550,47 @@ static bool sendToxPrivatePacket(
return false;
}
bool ToxP2PRNG::send_init_with_hmac(
Contact3Handle c,
const ByteSpan id,
const std::vector<Contact3Handle>& peers,
const ByteSpan inital_state,
const ByteSpan hmac
) {
auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::INIT_WITH_HMAC, id);
if (pkg.empty()) {
return false;
}
// - peerlist (includes sender, determines fusion order)
for (const auto peer : peers) {
if (const auto* tfp = peer.try_get<Contact::Components::ToxFriendPersistent>(); tfp != nullptr) {
pkg.insert(pkg.cend(), tfp->key.data.cbegin(), tfp->key.data.cend());
continue;
}
if (const auto* tgpp = peer.try_get<Contact::Components::ToxGroupPeerPersistent>(); tgpp != nullptr) {
pkg.insert(pkg.cend(), tgpp->peer_key.data.cbegin(), tgpp->peer_key.data.cend());
continue;
}
if (!peer.any_of<Contact::Components::ToxFriendPersistent, Contact::Components::ToxGroupPeerPersistent>()) {
return false;
}
}
// - sender hmac
pkg.insert(pkg.cend(), hmac.cbegin(), hmac.cend());
// - is
pkg.insert(pkg.cend(), inital_state.cbegin(), inital_state.cend());
std::cout << "TP2PRNG: seding INIT_WITH_HMAC s:" << pkg.size() << "\n";
return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
}
bool ToxP2PRNG::send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac) {
auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::HMAC, id);
if (pkg.empty()) {
@ -389,7 +600,7 @@ bool ToxP2PRNG::send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac) {
// - hmac
pkg.insert(pkg.cend(), hmac.cbegin(), hmac.cend());
return false;
return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
}
bool ToxP2PRNG::send_hmac_request(Contact3Handle c, ByteSpan id) {

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@ -50,7 +50,6 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
// use contacts instead?
entt::dense_map<Contact3, std::array<uint8_t, P2PRNG_MAC_LEN>> hmacs;
entt::dense_map<Contact3, std::array<uint8_t, P2PRNG_LEN + P2PRNG_MAC_KEY_LEN>> secrets;
entt::dense_map<Contact3, bool> secrets_valid;
void genFinalResult(void);
@ -93,17 +92,37 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
const bool _private
);
bool handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
bool handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
bool handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data);
bool handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data);
bool handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data);
bool handle_init_with_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data);
bool handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data);
bool handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpan data);
bool handle_secret(Contact3Handle c, const ByteSpan id, ByteSpan data);
bool handle_secret_request(Contact3Handle c, const ByteSpan id, ByteSpan data);
//bool send_init_with_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
bool send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac);
bool send_hmac_request(Contact3Handle c, ByteSpan id);
bool send_secret(Contact3Handle c, ByteSpan id, const ByteSpan secret);
bool send_secret_request(Contact3Handle c, ByteSpan id);
bool send_init_with_hmac(
Contact3Handle c,
const ByteSpan id,
const std::vector<Contact3Handle>& peers,
const ByteSpan inital_state,
const ByteSpan hmac
);
bool send_hmac(
Contact3Handle c,
const ByteSpan id,
const ByteSpan hmac
);
bool send_hmac_request(
Contact3Handle c,
const ByteSpan id
);
bool send_secret(
Contact3Handle c,
const ByteSpan id,
const ByteSpan secret
);
bool send_secret_request(
Contact3Handle c,
const ByteSpan id
);
RngState* getRngSate(Contact3Handle c, ByteSpan id);