Green-Sky/solanaceae_tox_p2prng
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handle more stuff, just gen init missing now

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(and timeouts, which dont happen on a perfect connection)
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Green Sky 2024-08-06 11:20:17 +02:00
parent 107b9bf59f
commit 66da5171d3
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2 changed files with 395 additions and 125 deletions
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508
src/solanaceae/tox_p2prng/tox_p2prng.cpp
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@ -6,6 +6,7 @@
#include <iostream>
#include <vector>
#include <utility>
// https://soundcloud.com/deadcrxw/glom-glass-deadcrow-flip-free-download
@ -34,6 +35,16 @@
#define TOX_PKG_ID_FRIEND 0xB1
#define TOX_PKG_ID_GROUP 0xa6
Contact3Handle ToxP2PRNG::RngState::getSelf(void) const {
for (auto c : contacts) {
if (c.all_of<Contact::Components::TagSelfStrong>()) {
return c;
}
}
return {};
}
void ToxP2PRNG::RngState::fillInitalStatePreamble(const ByteSpan id) {
// id
// res = id
@ -137,6 +148,105 @@ P2PRNG::State ToxP2PRNG::RngState::getState(void) const {
return P2PRNG::UNKNOWN;
}
void ToxP2PRNG::checkHaveAllHMACs(RngState* rng_state, const ByteSpan id) {
if (rng_state == nullptr) {
return;
}
if (rng_state->hmacs.size() != rng_state->contacts.size()) {
// dont have all hmacs yet
return;
}
// have all hmacs !
// now we send out our secret and collect secrets
// we should also validate any secret that already is in storage
// 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
Contact3Handle self = rng_state->getSelf();
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to look up self\n";
return;
}
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;
}
// 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) {
// TODO: record send success
send_secret(peer, id, ByteSpan{self_secret_it->second});
}
}
void ToxP2PRNG::checkHaveAllSecrets(RngState* rng_state, const ByteSpan id) {
if (rng_state == nullptr) {
return;
}
if (rng_state->secrets.size() != rng_state->contacts.size()) {
// dont have all secrets yet
return;
}
// have also all secrets o.O
rng_state->genFinalResult();
if (rng_state->final_result.empty()) {
std::cerr << "oh no, oh god\n";
return;
}
// fire done event
dispatch(
P2PRNG_Event::done,
P2PRNG::Events::Done{
id,
ByteSpan{rng_state->final_result},
}
);
}
ToxP2PRNG::ToxP2PRNG(
ToxI& t,
ToxEventProviderI& tep,
@ -158,12 +268,46 @@ std::vector<uint8_t> ToxP2PRNG::newGernationPeers(const std::vector<Contact3Hand
return {};
}
P2PRNG::State ToxP2PRNG::getSate(const ByteSpan id) {
P2PRNG::State ToxP2PRNG::getSate(const ByteSpan id_bytes) {
if (id_bytes.size != ID{}.size()) {
return P2PRNG::State::UNKNOWN;
}
ID r_id{};
{ // building the id is very annoying, should have not used array?
// TODO: provide custom comperator ?
for (size_t i = 0; i < r_id.size(); i++) {
r_id[i] = id_bytes[i];
}
}
const auto find_it = _global_map.find(r_id);
if (find_it == _global_map.cend()) {
return P2PRNG::State::UNKNOWN;
} else {
return find_it->second.getState();
}
}
ByteSpan ToxP2PRNG::getResult(const ByteSpan id) {
ByteSpan ToxP2PRNG::getResult(const ByteSpan id_bytes) {
if (id_bytes.size != ID{}.size()) {
return {};
}
ID r_id{};
{ // building the id is very annoying, should have not used array?
// TODO: provide custom comperator ?
for (size_t i = 0; i < r_id.size(); i++) {
r_id[i] = id_bytes[i];
}
}
const auto find_it = _global_map.find(r_id);
if (find_it == _global_map.cend()) {
return {};
} else {
return ByteSpan{find_it->second.final_result};
}
}
bool ToxP2PRNG::handlePacket(
@ -249,11 +393,166 @@ bool ToxP2PRNG::handleGroupPacket(
return handlePacket(c, tpr_pkg_type, {data.ptr+2, data.size-2});
}
#define _DATA_HAVE(x, error) if ((data.size - curser) < (x)) { error; }
bool ToxP2PRNG::handle_init_with_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
std::cerr << "TP2PRNG: got packet INIT_WITH_HMAC\n";
if (data.size < sizeof(uint16_t) + ToxKey{}.size() + 1) {
// bare minimum size is a single peer with 1byte IS
std::cerr << "TP2PRNG error: INIT_WITH_HMAC too small\n";
return false;
}
size_t curser = 0;
// - peerlist (includes sender, determines fusion order)
// first numer of peers
uint16_t peer_count = 0u;
_DATA_HAVE(sizeof(peer_count), std::cerr << "TP2PRNG error: packet too small, missing peer_count\n"; return false)
for (size_t i = 0; i < sizeof(peer_count); i++, curser++) {
peer_count |= uint32_t(data[curser]) << (i*8);
}
// then the peers
_DATA_HAVE(peer_count * ToxKey{}.size(), std::cerr << "TP2PRNG error: packet too small, missing peers\n"; return false)
std::vector<ToxKey> peers;
for (size_t peer_i = 0; peer_i < peer_count; peer_i++) {
auto& new_peer = peers.emplace_back();
for (size_t i = 0; i < new_peer.size(); i++, curser++) {
new_peer.data[i] = data[curser];
}
}
if (data.size - curser <= 0) {
std::cerr << "TP2PRNG error: packet too small, missing inital_state\n";
return false;
}
const ByteSpan inital_state {data.ptr + curser, data.size - curser};
// lets check if id already exists (after parse, so they cant cheap out)
if (const auto* rng_state = getRngSate(c, id); rng_state != nullptr) {
// we already know this maybe we did not send hmac or it got lost
auto self = rng_state->getSelf();
if (!static_cast<bool>(self)) {
std::cerr << "uh wtf\n";
return true;
}
auto hmac_it = rng_state->hmacs.find(self);
if (hmac_it == rng_state->hmacs.cend()) {
std::cerr << "uh wtf, bad bad\n";
return true;
}
send_hmac(c, id, ByteSpan{hmac_it->second});
return true; // mark handled
}
// else, its new
// first resolve peer keys to contacts
std::vector<Contact3Handle> peer_contacts;
if (c.all_of<Contact::Components::ToxFriendEphemeral>()) {
// assuming a 1to1 can only have 2 peers
assert(peers.size() == 2);
for (const auto& peer_key : peers) {
// TODO: accel lookup
for (const auto& [find_c, tfp] : c.registry()->view<Contact::Components::ToxFriendPersistent>().each()) {
if (tfp.key == peer_key) {
peer_contacts.push_back(Contact3Handle{*c.registry(), find_c});
break;
}
}
}
if (peer_contacts.size() != peers.size()) {
std::cerr << "TP2PRNG error: not all peers in peer list could be resolved to contacts\n";
return true;
}
} else if (c.all_of<Contact::Components::ToxGroupPeerEphemeral>()) {
for (const auto& peer_key : peers) {
// TODO: accel lookup
for (const auto& [find_c, tgpp] : c.registry()->view<Contact::Components::ToxGroupPeerPersistent>().each()) {
if (tgpp.peer_key == peer_key) {
peer_contacts.push_back(Contact3Handle{*c.registry(), find_c});
break;
}
}
}
if (peer_contacts.size() != peers.size()) {
std::cerr << "TP2PRNG error: not all peers in peer list could be resolved to contacts\n";
return true;
}
} else {
// yooo how did we get here
assert(false);
return true;
}
ID new_gen_id;
for (size_t i = 0; i < new_gen_id.size(); i++) {
new_gen_id[i] = id[i];
}
RngState& new_rng_state = _global_map[new_gen_id];
new_rng_state.inital_state = std::vector<uint8_t>(inital_state.cbegin(), inital_state.cend());
new_rng_state.contacts = std::move(peer_contacts);
new_rng_state.fillInitalStatePreamble(id); // could be faster if we used peer_keys directly
auto self = new_rng_state.getSelf();
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to find self in new gen\n";
_global_map.erase(new_gen_id);
return true;
}
std::vector<uint8_t> gen_inital_state = new_rng_state.inital_state_preamble;
gen_inital_state.insert(gen_inital_state.cend(), inital_state.cbegin(), inital_state.cend());
std::array<uint8_t, P2PRNG_MAC_LEN> hmac;
std::array<uint8_t, P2PRNG_LEN + P2PRNG_MAC_KEY_LEN> secret;
if (p2prng_gen_and_auth(secret.data(), secret.data()+P2PRNG_LEN, hmac.data(), gen_inital_state.data(), gen_inital_state.size()) != 0) {
std::cerr << "TP2PRNG error: failed to generate and hmac from is\n";
_global_map.erase(new_gen_id);
return true;
}
new_rng_state.hmacs[self] = hmac;
new_rng_state.secrets[self] = secret;
// fire init event?
dispatch(
P2PRNG_Event::init,
P2PRNG::Events::Init{
id,
false,
inital_state,
}
);
// TODO: queue
// TODO: record result
send_hmac(c, id, ByteSpan{hmac});
// fire hmac event
dispatch(
P2PRNG_Event::hmac,
P2PRNG::Events::HMAC{
id,
static_cast<uint16_t>(new_rng_state.hmacs.size()),
static_cast<uint16_t>(new_rng_state.contacts.size()),
}
);
// fun, this is the case in a 1to1
checkHaveAllHMACs(&new_rng_state, id);
// not possible, we hare handling INIT_WITH_HMAC here, not with secret
//checkHaveAllSecrets(&new_rng_state, id);
return true;
}
bool ToxP2PRNG::handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data) {
@ -298,105 +597,12 @@ bool ToxP2PRNG::handle_hmac(Contact3Handle c, const ByteSpan id, ByteSpan data)
}
);
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});
}
// might be the final one we need
checkHaveAllHMACs(rng_state, id);
// :) 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},
}
);
checkHaveAllSecrets(rng_state, id);
return true;
}
@ -416,17 +622,7 @@ bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpa
// 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};
}
}
Contact3Handle self = rng_state->getSelf();
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to look up self\n";
@ -441,15 +637,87 @@ bool ToxP2PRNG::handle_hmac_request(Contact3Handle c, const ByteSpan id, ByteSpa
}
// TODO: queue these instead
// TODO: record send success
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;
if (data.size < P2PRNG_LEN + P2PRNG_MAC_KEY_LEN) {
std::cerr << "TP2PRNG error: SECRET missing from SECRET\n";
return false;
}
if (data.size > P2PRNG_LEN + P2PRNG_MAC_KEY_LEN) {
std::cerr << "TP2PRNG warning: SECRET pkg has extra data!\n";
}
auto* rng_state = getRngSate(c, id);
if (rng_state == nullptr) {
return false;
}
// check if preexisting (do nothing)
auto secret_it = rng_state->secrets.find(c);
if (secret_it == rng_state->secrets.cend()) {
// preexisting
return true; // mark handled
}
const auto current_phase = rng_state->getState();
if (current_phase == P2PRNG::State::SECRET) { // validate if state correct
const ByteSpan msg {data.ptr, P2PRNG_LEN};
const ByteSpan key {data.ptr+P2PRNG_LEN, P2PRNG_MAC_KEY_LEN};
// hmac is only guarrantied to exist if state is correct
const auto& pre_hmac = rng_state->hmacs.at(c);
if (p2prng_auth_verify(key.ptr, pre_hmac.data(), msg.ptr, msg.size) != 0) {
// bad secret
std::cerr
<< "########################################\n"
<< "TP2PRNG error: bad secret, validation failed!\n"
<< "########################################\n"
;
dispatch(
P2PRNG_Event::val_error,
P2PRNG::Events::ValError{
id,
c,
}
);
}
}
// add
auto& secret_record = rng_state->secrets[c];
for (size_t i = 0; i < P2PRNG_LEN + P2PRNG_MAC_KEY_LEN; i++) {
secret_record[i] = data[i];
}
if (current_phase != P2PRNG::State::SECRET) {
// arrived early
return true;
}
// event if phase correct
dispatch(
P2PRNG_Event::secret,
P2PRNG::Events::Secret{
id,
static_cast<uint16_t>(rng_state->secrets.size()),
static_cast<uint16_t>(rng_state->contacts.size()),
}
);
// might have been last, we might be done
checkHaveAllSecrets(rng_state, id);
return true;
}
bool ToxP2PRNG::handle_secret_request(Contact3Handle c, const ByteSpan id, ByteSpan data) {
@ -470,17 +738,7 @@ bool ToxP2PRNG::handle_secret_request(Contact3Handle c, const ByteSpan id, ByteS
}
// 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};
}
}
Contact3Handle self = rng_state->getSelf();
if (!static_cast<bool>(self)) {
std::cerr << "TP2PRNG error: failed to look up self\n";
@ -496,6 +754,7 @@ bool ToxP2PRNG::handle_secret_request(Contact3Handle c, const ByteSpan id, ByteS
// TODO: queue these instead
// SEND secret to c
// TODO: record send success
send_secret(c, id, ByteSpan{self_secret_it->second});
return true;
@ -563,6 +822,13 @@ bool ToxP2PRNG::send_init_with_hmac(
}
// - peerlist (includes sender, determines fusion order)
// first numer of peers
const uint16_t peer_count = peers.size();
for (size_t i = 0; i < sizeof(peer_count); i++) {
pkg.push_back((peer_count>>(i*8)) & 0xff);
}
// second the peers
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());

4
src/solanaceae/tox_p2prng/tox_p2prng.hpp
View File

@ -37,6 +37,7 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
struct RngState {
// all contacts participating, including self
std::vector<Contact3Handle> contacts;
Contact3Handle getSelf(void) const;
// app given
std::vector<uint8_t> inital_state;
@ -59,6 +60,9 @@ class ToxP2PRNG : public P2PRNGI, public ToxEventI {
};
entt::dense_map<ID, RngState, IDHash> _global_map;
void checkHaveAllHMACs(RngState* rng_state, const ByteSpan id);
void checkHaveAllSecrets(RngState* rng_state, const ByteSpan id); // can fire done event
public:
ToxP2PRNG(
ToxI& t,