more refactor and features (hmac collection)
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@ -75,16 +75,16 @@ namespace P2PRNG::Events {
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struct HMAC {
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const ByteSpan id;
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int32_t have;
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int32_t out_of;
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uint16_t have;
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uint16_t out_of;
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};
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// received a secret (or own, when first)
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struct Secret {
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const ByteSpan id;
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int32_t have;
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int32_t out_of;
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uint16_t have;
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uint16_t out_of;
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};
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struct Done {
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@ -7,12 +7,15 @@
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#include <iostream>
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#include <vector>
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// https://soundcloud.com/deadcrxw/glom-glass-deadcrow-flip-free-download
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// packets:
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//
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// init_with_hmac
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// - id
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// - peerlist (includes sender, determines fusion order)
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// - sender hmac
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// - is
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//
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// hmac
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// - id
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@ -246,21 +249,159 @@ bool ToxP2PRNG::handleGroupPacket(
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return handlePacket(c, tpr_pkg_type, {data.ptr+2, data.size-2});
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}
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bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
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bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
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std::cerr << "TP2PRNG: got packet INIT_WITH_HMAC\n";
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size_t curser = 0;
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return false;
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}
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bool ToxP2PRNG::handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data) {
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bool ToxP2PRNG::handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
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std::cerr << "TP2PRNG: got packet HMAC\n";
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size_t curser = 0;
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if (data.size < P2PRNG_MAC_LEN) {
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std::cerr << "TP2PRNG error: HMAC missing from HMAC\n";
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return false;
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}
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ByteSpan hmac {data.ptr, P2PRNG_MAC_LEN};
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if (data.size > hmac.size) {
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std::cerr << "TP2PRNG warning: HMAC pkg has extra data!\n";
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}
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auto* rng_state = getRngSate(c, id);
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if (rng_state == nullptr) {
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return false;
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}
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// check if preexisting (do nothing)
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auto hmac_it = rng_state->hmacs.find(c);
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if (hmac_it == rng_state->hmacs.cend()) {
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// preexisting
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return false;
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}
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// add and do events
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auto& hmac_record = rng_state->hmacs[c];
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for (size_t i = 0; i < P2PRNG_MAC_LEN; i++) {
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hmac_record[i] = hmac[i];
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}
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// fire update event
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dispatch(
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P2PRNG_Event::hmac,
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P2PRNG::Events::HMAC{
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id,
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static_cast<uint16_t>(rng_state->hmacs.size()),
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static_cast<uint16_t>(rng_state->contacts.size()),
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}
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);
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if (rng_state->hmacs.size() != rng_state->contacts.size()) {
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// dont have all hmacs yet
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return true;
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}
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// have all hmacs !
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// now we send out our secret and collect secrets
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// we should also validate any secret that already is in storage
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// TODO: move somewhere else
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// validate existing (self should be good)
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std::vector<Contact3> bad_secrets;
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for (const auto& [pre_c, secret] : rng_state->secrets) {
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const auto& pre_hmac = rng_state->hmacs.at(pre_c);
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if (p2prng_auth_verify(secret.data()+P2PRNG_LEN, pre_hmac.data(), secret.data(), P2PRNG_LEN) != 0) {
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// bad secret
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std::cerr
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<< "########################################\n"
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<< "TP2PRNG error: bad secret, validation failed!\n"
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<< "########################################\n"
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;
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bad_secrets.push_back(pre_c);
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dispatch(
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P2PRNG_Event::val_error,
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P2PRNG::Events::ValError{
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id,
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pre_c,
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}
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);
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}
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}
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for (const auto bad_c : bad_secrets) {
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rng_state->secrets.erase(bad_c);
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}
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// find self contact
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// TODO: accel
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// TODO: do TagSelfStrong over contacts instead?? probably. maybe additionally
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Contact3Handle self;
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if (c.all_of<Contact::Components::Self>()) {
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self = Contact3Handle{*c.registry(), c.get<Contact::Components::Self>().self};
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} else if (c.all_of<Contact::Components::Parent>()) {
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Contact3Handle parent = {*c.registry(), c.get<Contact::Components::Parent>().parent};
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if (static_cast<bool>(parent) && parent.all_of<Contact::Components::Self>()) {
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self = Contact3Handle{*c.registry(), parent.get<Contact::Components::Self>().self};
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}
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}
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if (!static_cast<bool>(self)) {
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std::cerr << "TP2PRNG error: failed to look up self\n";
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return false;
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}
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auto self_secret_it = rng_state->secrets.find(self);
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if (self_secret_it == rng_state->secrets.cend()) {
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// hmmmmmmmmmm this bad
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std::cerr << "hmmmmmmmmmm this bad\n";
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return false;
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}
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// fire update event
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dispatch(
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P2PRNG_Event::secret,
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P2PRNG::Events::Secret{
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id,
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static_cast<uint16_t>(rng_state->secrets.size()),
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static_cast<uint16_t>(rng_state->contacts.size()),
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}
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);
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// TODO: queue these instead
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for (const auto peer : rng_state->contacts) {
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send_secret(peer, id, ByteSpan{self_secret_it->second});
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}
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// :) now the funky part
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// what if we also already have all secrets (a single hmac was the hold up)
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if (rng_state->secrets.size() != rng_state->contacts.size()) {
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// dont have all secrets yet
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return true;
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}
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// have also all secrets o.O
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rng_state->genFinalResult();
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if (rng_state->final_result.empty()) {
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std::cerr << "oh no, oh god\n";
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return true;
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}
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// fire done event
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dispatch(
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P2PRNG_Event::done,
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P2PRNG::Events::Done{
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id,
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ByteSpan{rng_state->final_result},
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}
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);
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return true;
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}
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bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
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bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpan data) {
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std::cerr << "TP2PRNG: got packet HMAC_REQUEST\n";
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if (!data.empty()) {
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@ -272,17 +413,46 @@ bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data
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return false;
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}
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// no state check necessary
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// find self contact
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// TODO: accel
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// TODO: do TagSelfStrong over contacts instead?? probably. maybe additionally
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Contact3Handle self;
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if (c.all_of<Contact::Components::Self>()) {
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self = Contact3Handle{*c.registry(), c.get<Contact::Components::Self>().self};
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} else if (c.all_of<Contact::Components::Parent>()) {
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Contact3Handle parent = {*c.registry(), c.get<Contact::Components::Parent>().parent};
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if (static_cast<bool>(parent) && parent.all_of<Contact::Components::Self>()) {
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self = Contact3Handle{*c.registry(), parent.get<Contact::Components::Self>().self};
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}
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}
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if (!static_cast<bool>(self)) {
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std::cerr << "TP2PRNG error: failed to look up self\n";
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return false;
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}
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auto self_hmac_it = rng_state->hmacs.find(self);
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if (self_hmac_it == rng_state->hmacs.cend()) {
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// hmmmmmmmmmm this bad
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std::cerr << "hmmmmmmmmmm this bad\n";
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return false;
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}
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// TODO: queue these instead
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send_hmac(c, id, ByteSpan{self_hmac_it->second});
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return false;
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}
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bool ToxP2PRNG::handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data) {
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bool ToxP2PRNG::handle_secret(Contact3Handle c, const ByteSpan id, ByteSpan data) {
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std::cerr << "TP2PRNG: got packet SECRET\n";
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size_t curser = 0;
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return false;
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}
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bool ToxP2PRNG::handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data) {
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bool ToxP2PRNG::handle_secret_request(Contact3Handle c, const ByteSpan id, ByteSpan data) {
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std::cerr << "TP2PRNG: got packet SECRET_REQUEST\n";
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if (!data.empty()) {
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@ -380,6 +550,47 @@ static bool sendToxPrivatePacket(
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return false;
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}
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bool ToxP2PRNG::send_init_with_hmac(
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Contact3Handle c,
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const ByteSpan id,
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const std::vector<Contact3Handle>& peers,
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const ByteSpan inital_state,
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const ByteSpan hmac
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) {
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auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::INIT_WITH_HMAC, id);
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if (pkg.empty()) {
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return false;
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}
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// - peerlist (includes sender, determines fusion order)
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for (const auto peer : peers) {
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if (const auto* tfp = peer.try_get<Contact::Components::ToxFriendPersistent>(); tfp != nullptr) {
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pkg.insert(pkg.cend(), tfp->key.data.cbegin(), tfp->key.data.cend());
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continue;
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}
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if (const auto* tgpp = peer.try_get<Contact::Components::ToxGroupPeerPersistent>(); tgpp != nullptr) {
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pkg.insert(pkg.cend(), tgpp->peer_key.data.cbegin(), tgpp->peer_key.data.cend());
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continue;
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}
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if (!peer.any_of<Contact::Components::ToxFriendPersistent, Contact::Components::ToxGroupPeerPersistent>()) {
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return false;
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}
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}
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// - sender hmac
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pkg.insert(pkg.cend(), hmac.cbegin(), hmac.cend());
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// - is
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pkg.insert(pkg.cend(), inital_state.cbegin(), inital_state.cend());
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std::cout << "TP2PRNG: seding INIT_WITH_HMAC s:" << pkg.size() << "\n";
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return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
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}
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bool ToxP2PRNG::send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac) {
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auto [pkg, tfe, tgpe] = prepSendPkgWithID(c, PKG::HMAC, id);
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if (pkg.empty()) {
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@ -389,7 +600,7 @@ bool ToxP2PRNG::send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac) {
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// - hmac
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pkg.insert(pkg.cend(), hmac.cbegin(), hmac.cend());
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return false;
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return sendToxPrivatePacket(_t, tfe, tgpe, pkg);
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}
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bool ToxP2PRNG::send_hmac_request(Contact3Handle c, ByteSpan id) {
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@ -50,7 +50,6 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
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// use contacts instead?
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entt::dense_map<Contact3, std::array<uint8_t, P2PRNG_MAC_LEN>> hmacs;
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entt::dense_map<Contact3, std::array<uint8_t, P2PRNG_LEN + P2PRNG_MAC_KEY_LEN>> secrets;
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entt::dense_map<Contact3, bool> secrets_valid;
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void genFinalResult(void);
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@ -93,17 +92,37 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
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const bool _private
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);
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bool handle_init_with_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
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bool handle_hmac(Contact3Handle c, ByteSpan id, ByteSpan data);
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bool handle_hmac_request(Contact3Handle c, ByteSpan id, ByteSpan data);
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bool handle_secret(Contact3Handle c, ByteSpan id, ByteSpan data);
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bool handle_secret_request(Contact3Handle c, ByteSpan id, ByteSpan data);
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bool handle_init_with_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data);
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bool handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data);
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bool handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpan data);
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bool handle_secret(Contact3Handle c, const ByteSpan id, ByteSpan data);
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bool handle_secret_request(Contact3Handle c, const ByteSpan id, ByteSpan data);
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//bool send_init_with_hmac(Contact3Handle c, ByteSpan id, const uint8_t* data, size_t data_size);
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bool send_hmac(Contact3Handle c, ByteSpan id, const ByteSpan hmac);
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bool send_hmac_request(Contact3Handle c, ByteSpan id);
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bool send_secret(Contact3Handle c, ByteSpan id, const ByteSpan secret);
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bool send_secret_request(Contact3Handle c, ByteSpan id);
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bool send_init_with_hmac(
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Contact3Handle c,
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const ByteSpan id,
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const std::vector<Contact3Handle>& peers,
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const ByteSpan inital_state,
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const ByteSpan hmac
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);
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bool send_hmac(
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Contact3Handle c,
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const ByteSpan id,
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const ByteSpan hmac
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);
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bool send_hmac_request(
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Contact3Handle c,
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const ByteSpan id
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);
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bool send_secret(
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Contact3Handle c,
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const ByteSpan id,
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const ByteSpan secret
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);
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bool send_secret_request(
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Contact3Handle c,
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const ByteSpan id
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);
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RngState* getRngSate(Contact3Handle c, ByteSpan id);
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