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Add set peer_pk, sk/pk, start/stop threaded update

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Note, this code is UNTESTED.
This commit is contained in:
Stephen Seo 2019-11-19 20:55:20 +09:00
parent 4cfe35ecd1
commit 240ed9821f
3 changed files with 263 additions and 12 deletions
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8
src/UDPC_Defines.hpp
View file

@ -86,7 +86,9 @@ struct ConnectionData {
UDPC_IPV6_ADDR_TYPE addr,
uint32_t scope_id,
uint16_t port,
bool isUsingLibsodium);
bool isUsingLibsodium,
unsigned char *sk,
unsigned char *pk);
// copy
ConnectionData(const ConnectionData& other) = delete;
@ -106,6 +108,7 @@ struct ConnectionData {
* 4 - is id set
* 5 - error initializing keys for public key encryption
* 6 - using libsodium for header verification
* 7 - peer_pk pre-set
*/
std::bitset<8> flags;
uint32_t id;
@ -229,6 +232,9 @@ public:
std::mutex mutex;
std::chrono::milliseconds threadedSleepTime;
unsigned char sk[crypto_sign_SECRETKEYBYTES];
unsigned char pk[crypto_sign_PUBLICKEYBYTES];
std::atomic_bool keysSet;
}; // struct Context

247
src/UDPConnection.cpp
View file

@ -126,7 +126,9 @@ UDPC::ConnectionData::ConnectionData(
UDPC_IPV6_ADDR_TYPE addr,
uint32_t scope_id,
uint16_t port,
bool isUsingLibsodium) :
bool isUsingLibsodium,
unsigned char *sk,
unsigned char *pk) :
flags(),
id(0),
lseq(0),
@ -157,7 +159,12 @@ rtt(std::chrono::steady_clock::duration::zero())
#ifdef UDPC_LIBSODIUM_ENABLED
if(isUsingLibsodium) {
if(sodium_init() >= 0) {
crypto_sign_keypair(pk, sk);
if(sk && pk) {
std::memcpy(this->sk, sk, crypto_sign_SECRETKEYBYTES);
std::memcpy(this->pk, pk, crypto_sign_PUBLICKEYBYTES);
} else {
crypto_sign_keypair(pk, sk);
}
flags.reset(5);
flags.set(6);
} else {
@ -216,6 +223,7 @@ mutex()
rng_engine.seed(std::chrono::system_clock::now().time_since_epoch().count());
threadRunning.store(true);
keysSet.store(false);
}
bool UDPC::Context::willLog(UDPC_LoggingType type) {
@ -260,6 +268,12 @@ void UDPC::Context::update_impl() {
switch(optE.value().type) {
case UDPC_ET_REQUEST_CONNECT:
{
unsigned char *sk = nullptr;
unsigned char *pk = nullptr;
if(keysSet.load()) {
sk = this->sk;
pk = this->pk;
}
UDPC::ConnectionData newCon(
false,
this,
@ -267,9 +281,11 @@ void UDPC::Context::update_impl() {
optE.value().conId.scope_id,
optE.value().conId.port,
#ifdef UDPC_LIBSODIUM_ENABLED
flags.test(2) && optE.value().v.enableLibSodium != 0);
flags.test(2) && optE.value().v.enableLibSodium != 0,
sk, pk);
#else
false);
false,
sk, pk);
#endif
if(newCon.flags.test(5)) {
UDPC_CHECK_LOG(this,
@ -283,6 +299,7 @@ void UDPC::Context::update_impl() {
}
newCon.sent = std::chrono::steady_clock::now() - UDPC::INIT_PKT_INTERVAL_DT;
if(flags.test(2) && newCon.flags.test(6)) {
// set up verification string to send to server
std::stringstream ss;
auto timeT = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
ss << std::put_time(std::gmtime(&timeT), "%c %Z");
@ -292,6 +309,95 @@ void UDPC::Context::update_impl() {
std::memcpy(newCon.verifyMessage.get() + 4, timeString.c_str(), timeString.size());
}
if(conMap.find(optE.value().conId) == conMap.end()) {
conMap.insert(std::make_pair(
optE.value().conId,
std::move(newCon)));
auto addrConIter = addrConMap.find(optE.value().conId.addr);
if(addrConIter == addrConMap.end()) {
auto insertResult = addrConMap.insert(std::make_pair(
optE.value().conId.addr,
std::unordered_set<UDPC_ConnectionId, UDPC::ConnectionIdHasher>{}));
assert(insertResult.second &&
"new connection insert into addrConMap must not fail");
addrConIter = insertResult.first;
}
addrConIter->second.insert(optE.value().conId);
UDPC_CHECK_LOG(this,
UDPC_LoggingType::UDPC_INFO,
"Client initiating connection to ",
UDPC_atostr((UDPC_HContext)this, optE.value().conId.addr),
" port ",
optE.value().conId.port,
" ...");
} else {
UDPC_CHECK_LOG(this,
UDPC_LoggingType::UDPC_WARNING,
"Client initiate connection, already connected to peer ",
UDPC_atostr((UDPC_HContext)this, optE.value().conId.addr),
" port ",
optE.value().conId.port);
}
}
break;
case UDPC_ET_REQUEST_CONNECT_PK:
{
assert(flags.test(2) &&
"libsodium should be explictly enabled");
unsigned char *sk = nullptr;
unsigned char *pk = nullptr;
if(keysSet.load()) {
sk = this->sk;
pk = this->pk;
}
UDPC::ConnectionData newCon(
false,
this,
optE.value().conId.addr,
optE.value().conId.scope_id,
optE.value().conId.port,
#ifdef UDPC_LIBSODIUM_ENABLED
true,
sk, pk);
#else
false,
sk, pk);
assert(!"compiled without libsodium support");
delete[] optE.value().v.pk;
break;
#endif
if(newCon.flags.test(5)) {
delete[] optE.value().v.pk;
UDPC_CHECK_LOG(this,
UDPC_LoggingType::UDPC_ERROR,
"Failed to init ConnectionData instance (libsodium "
"init fail) while client establishing connection with ",
UDPC_atostr((UDPC_HContext)this, optE.value().conId.addr),
" port ",
optE.value().conId.port);
continue;
}
newCon.sent = std::chrono::steady_clock::now() - UDPC::INIT_PKT_INTERVAL_DT;
if(flags.test(2) && newCon.flags.test(6)) {
// set up verification string to send to server
std::stringstream ss;
auto timeT = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
ss << std::put_time(std::gmtime(&timeT), "%c %Z");
auto timeString = ss.str();
newCon.verifyMessage = std::make_unique<char[]>(4 + timeString.size());
*((uint32_t*)newCon.verifyMessage.get()) = timeString.size();
std::memcpy(newCon.verifyMessage.get() + 4, timeString.c_str(), timeString.size());
// set peer public key
std::memcpy(
newCon.peer_pk,
optE.value().v.pk,
crypto_sign_PUBLICKEYBYTES);
newCon.flags.set(7);
}
delete[] optE.value().v.pk;
if(conMap.find(optE.value().conId) == conMap.end()) {
conMap.insert(std::make_pair(
optE.value().conId,
@ -1040,6 +1146,12 @@ void UDPC::Context::update_impl() {
&& conMap.find(identifier) == conMap.end()
&& isAcceptNewConnections.load()) {
// is receiving as server, connection did not already exist
unsigned char *sk = nullptr;
unsigned char *pk = nullptr;
if(keysSet.load()) {
sk = this->sk;
pk = this->pk;
}
UDPC::ConnectionData newConnection(
true,
this,
@ -1047,9 +1159,11 @@ void UDPC::Context::update_impl() {
receivedData.sin6_scope_id,
ntohs(receivedData.sin6_port),
#ifdef UDPC_LIBSODIUM_ENABLED
pktType == 1 && flags.test(2));
pktType == 1 && flags.test(2),
sk, pk);
#else
false);
false,
sk, pk);
#endif
if(newConnection.flags.test(5)) {
UDPC_CHECK_LOG(this,
@ -1123,8 +1237,20 @@ void UDPC::Context::update_impl() {
if(pktType == 2 && flags.test(2) && iter->second.flags.test(6)) {
#ifdef UDPC_LIBSODIUM_ENABLED
std::memcpy(iter->second.peer_pk, recvBuf + UDPC_MIN_HEADER_SIZE + 4,
crypto_sign_PUBLICKEYBYTES);
if(iter->second.flags.test(7)) {
if(std::memcmp(iter->second.peer_pk,
recvBuf + UDPC_MIN_HEADER_SIZE + 4,
crypto_sign_PUBLICKEYBYTES) != 0) {
UDPC_CHECK_LOG(this, UDPC_LoggingType::UDPC_WARNING,
"peer_pk did not match pre-set peer_pk, not "
"establishing connection");
return;
}
} else {
std::memcpy(iter->second.peer_pk,
recvBuf + UDPC_MIN_HEADER_SIZE + 4,
crypto_sign_PUBLICKEYBYTES);
}
if(crypto_sign_verify_detached(
(unsigned char*)(recvBuf + UDPC_MIN_HEADER_SIZE + 4 + crypto_sign_PUBLICKEYBYTES),
(unsigned char*)(iter->second.verifyMessage.get() + 4),
@ -1145,6 +1271,12 @@ void UDPC::Context::update_impl() {
#endif
} else if(pktType == 0 && iter->second.flags.test(6)) {
iter->second.flags.reset(6);
if(iter->second.flags.test(7)) {
UDPC_CHECK_LOG(this, UDPC_LoggingType::UDPC_WARNING,
"peer is not using libsodium, but peer_pk was "
"pre-set, dropping to no-verification mode");
// TODO set policy for using/not-using libsodium
}
}
iter->second.flags.reset(3);
@ -1618,6 +1750,7 @@ UDPC_HContext UDPC_init_threaded_update(UDPC_ConnectionId listenId,
if(!ctx) {
return nullptr;
}
ctx->flags.set(0);
ctx->threadedSleepTime = std::chrono::milliseconds(8);
ctx->thread = std::thread(UDPC::threadedUpdate, ctx);
@ -1635,6 +1768,7 @@ UDPC_HContext UDPC_init_threaded_update_ms(
if(!ctx) {
return nullptr;
}
ctx->flags.set(0);
if(updateMS < 4) {
ctx->threadedSleepTime = std::chrono::milliseconds(4);
@ -1650,6 +1784,53 @@ UDPC_HContext UDPC_init_threaded_update_ms(
return (UDPC_HContext) ctx;
}
void UDPC_enable_threaded_update(UDPC_HContext ctx) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || c->flags.test(0) || c->thread.joinable()) {
return;
}
c->flags.set(0);
c->threadedSleepTime = std::chrono::milliseconds(8);
c->threadRunning.store(true);
c->thread = std::thread(UDPC::threadedUpdate, c);
UDPC_CHECK_LOG(c, UDPC_LoggingType::UDPC_INFO, "Started threaded update");
}
void UDPC_enable_threaded_update_ms(UDPC_HContext ctx, int updateMS) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || c->flags.test(0) || c->thread.joinable()) {
return;
}
c->flags.set(0);
if(updateMS < 4) {
c->threadedSleepTime = std::chrono::milliseconds(4);
} else if(updateMS > 333) {
c->threadedSleepTime = std::chrono::milliseconds(333);
} else {
c->threadedSleepTime = std::chrono::milliseconds(updateMS);
}
c->threadRunning.store(true);
c->thread = std::thread(UDPC::threadedUpdate, c);
UDPC_CHECK_LOG(c, UDPC_LoggingType::UDPC_INFO, "Started threaded update");
}
void UDPC_disable_threaded_update(UDPC_HContext ctx) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || !c->flags.test(0) || !c->thread.joinable()) {
return;
}
c->threadRunning.store(false);
c->thread.join();
c->flags.reset(0);
UDPC_CHECK_LOG(c, UDPC_LoggingType::UDPC_INFO, "Stopped threaded update");
}
void UDPC_destroy(UDPC_HContext ctx) {
UDPC::Context *UDPC_ctx = UDPC::verifyContext(ctx);
if(UDPC_ctx) {
@ -1660,6 +1841,12 @@ void UDPC_destroy(UDPC_HContext ctx) {
#if UDPC_PLATFORM == UDPC_PLATFORM_WINDOWS
WSACleanup();
#endif
while(!UDPC_ctx->internalEvents.empty()) {
auto optE = UDPC_ctx->internalEvents.top_and_pop();
if(optE.has_value() && optE.value().type == UDPC_ET_REQUEST_CONNECT_PK) {
delete[] optE.value().v.pk;
}
}
delete UDPC_ctx;
}
}
@ -1674,7 +1861,10 @@ void UDPC_update(UDPC_HContext ctx) {
c->update_impl();
}
void UDPC_client_initiate_connection(UDPC_HContext ctx, UDPC_ConnectionId connectionId, int enableLibSodium) {
void UDPC_client_initiate_connection(
UDPC_HContext ctx,
UDPC_ConnectionId connectionId,
int enableLibSodium) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || !c->flags.test(1)) {
return;
@ -1690,6 +1880,34 @@ void UDPC_client_initiate_connection(UDPC_HContext ctx, UDPC_ConnectionId connec
c->internalEvents.push(UDPC_Event{UDPC_ET_REQUEST_CONNECT, connectionId, enableLibSodium});
}
void UDPC_client_initiate_connection_pk(
UDPC_HContext ctx,
UDPC_ConnectionId connectionId,
unsigned char *serverPK) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || !c->flags.test(1)) {
return;
}
#ifndef UDPC_LIBSODIUM_ENABLED
UDPC_CHECK_LOG(c, UDPC_LoggingType::UDPC_ERROR,
"Cannot initiate connection with public key, UDPC was compiled "
"without libsodium");
return;
#else
else if(!c->flags.test(2)) {
UDPC_CHECK_LOG(c, UDPC_LoggingType::UDPC_ERROR,
"Cannot initiate connection with public key, libsodium is not "
"enabled");
return;
}
#endif
UDPC_Event event{UDPC_ET_REQUEST_CONNECT_PK, connectionId, 0};
event.v.pk = new unsigned char[crypto_sign_PUBLICKEYBYTES];
std::memcpy(event.v.pk, serverPK, crypto_sign_PUBLICKEYBYTES);
c->internalEvents.push(event);
}
void UDPC_queue_send(UDPC_HContext ctx, UDPC_ConnectionId destinationId,
int isChecked, void *data, uint32_t size) {
if(size == 0 || !data) {
@ -1860,6 +2078,17 @@ UDPC_PacketInfo UDPC_get_received(UDPC_HContext ctx, unsigned long *remaining) {
return UDPC::get_empty_pinfo();
}
void UDPC_set_libsodium_keys(UDPC_HContext ctx, unsigned char *sk, unsigned char *pk) {
UDPC::Context *c = UDPC::verifyContext(ctx);
if(!c || !c->flags.test(2)) {
return;
}
std::memcpy(c->sk, sk, crypto_sign_SECRETKEYBYTES);
std::memcpy(c->pk, pk, crypto_sign_PUBLICKEYBYTES);
c->keysSet.store(true);
}
const char *UDPC_atostr_cid(UDPC_HContext ctx, UDPC_ConnectionId connectionId) {
return UDPC_atostr(ctx, connectionId.addr);
}

20
src/UDPConnection.h
View file

@ -101,7 +101,8 @@ typedef enum {
UDPC_ET_CONNECTED,
UDPC_ET_DISCONNECTED,
UDPC_ET_GOOD_MODE,
UDPC_ET_BAD_MODE
UDPC_ET_BAD_MODE,
UDPC_ET_REQUEST_CONNECT_PK
} UDPC_EventType;
typedef struct {
@ -110,6 +111,7 @@ typedef struct {
union Value {
int dropAllWithAddr;
int enableLibSodium;
unsigned char *pk;
} v;
} UDPC_Event;
@ -133,11 +135,23 @@ UDPC_HContext UDPC_init_threaded_update_ms(
int updateMS,
int isUsingLibsodium);
void UDPC_enable_threaded_update(UDPC_HContext ctx);
void UDPC_enable_threaded_update_ms(UDPC_HContext ctx, int updateMS);
void UDPC_disable_threaded_update(UDPC_HContext ctx);
void UDPC_destroy(UDPC_HContext ctx);
void UDPC_update(UDPC_HContext ctx);
void UDPC_client_initiate_connection(UDPC_HContext ctx, UDPC_ConnectionId connectionId, int enableLibSodium);
void UDPC_client_initiate_connection(
UDPC_HContext ctx,
UDPC_ConnectionId connectionId,
int enableLibSodium);
void UDPC_client_initiate_connection_pk(
UDPC_HContext ctx,
UDPC_ConnectionId connectionId,
unsigned char *serverPK);
void UDPC_queue_send(UDPC_HContext ctx, UDPC_ConnectionId destinationId,
int isChecked, void *data, uint32_t size);
@ -170,6 +184,8 @@ UDPC_Event UDPC_get_event(UDPC_HContext ctx, unsigned long *remaining);
UDPC_PacketInfo UDPC_get_received(UDPC_HContext ctx, unsigned long *remaining);
void UDPC_set_libsodium_keys(UDPC_HContext ctx, unsigned char *sk, unsigned char *pk);
const char *UDPC_atostr_cid(UDPC_HContext ctx, UDPC_ConnectionId connectionId);
const char *UDPC_atostr(UDPC_HContext ctx, UDPC_IPV6_ADDR_TYPE addr);