/*
* This is the source code of tgnet library v. 1.0
* It is licensed under GNU GPL v. 2 or later.
* You should have received a copy of the license in this archive (see LICENSE).
*
* Copyright Nikolai Kudashov, 2015.
*/
#include <stdlib.h>
#include <algorithm>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include <openssl/bn.h>
#include <openssl/pem.h>
#include <openssl/aes.h>
#include <memory.h>
#include "Datacenter.h"
#include "Connection.h"
#include "MTProtoScheme.h"
#include "ApiScheme.h"
#include "FileLog.h"
#include "NativeByteBuffer.h"
#include "ByteArray.h"
#include "BuffersStorage.h"
#include "ConnectionsManager.h"
#include "Config.h"
static std::vector<std::string> serverPublicKeys;
static std::vector<uint64_t> serverPublicKeysFingerprints;
static std::map<int32_t, std::string> cdnPublicKeys;
static std::map<int32_t, uint64_t> cdnPublicKeysFingerprints;
static std::vector<Datacenter *> cdnWaitingDatacenters;
static bool loadingCdnKeys = false;
static BN_CTX *bnContext = nullptr;
static SHA256_CTX sha256Ctx;
static Config *cdnConfig = nullptr;
Datacenter::Datacenter(uint32_t id) {
datacenterId = id;
for (uint32_t a = 0; a < UPLOAD_CONNECTIONS_COUNT; a++) {
uploadConnection[a] = nullptr;
}
for (uint32_t a = 0; a < DOWNLOAD_CONNECTIONS_COUNT; a++) {
downloadConnection[a] = nullptr;
}
}
Datacenter::Datacenter(NativeByteBuffer *data) {
for (uint32_t a = 0; a < UPLOAD_CONNECTIONS_COUNT; a++) {
uploadConnection[a] = nullptr;
}
for (uint32_t a = 0; a < DOWNLOAD_CONNECTIONS_COUNT; a++) {
downloadConnection[a] = nullptr;
}
uint32_t currentVersion = data->readUint32(nullptr);
if (currentVersion >= 2 && currentVersion <= 7) {
datacenterId = data->readUint32(nullptr);
if (currentVersion >= 3) {
lastInitVersion = data->readUint32(nullptr);
}
uint32_t len = data->readUint32(nullptr);
for (uint32_t a = 0; a < len; a++) {
std::string address = data->readString(nullptr);
uint32_t port = data->readUint32(nullptr);
int32_t flags;
if (currentVersion >= 7) {
flags = data->readInt32(nullptr);
} else {
flags = 0;
}
addressesIpv4.push_back(TcpAddress(address, port, flags));
}
if (currentVersion >= 5) {
len = data->readUint32(nullptr);
for (uint32_t a = 0; a < len; a++) {
std::string address = data->readString(nullptr);
uint32_t port = data->readUint32(nullptr);
int32_t flags;
if (currentVersion >= 7) {
flags = data->readInt32(nullptr);
} else {
flags = 0;
}
addressesIpv6.push_back(TcpAddress(address, port, flags));
}
len = data->readUint32(nullptr);
for (uint32_t a = 0; a < len; a++) {
std::string address = data->readString(nullptr);
uint32_t port = data->readUint32(nullptr);
int32_t flags;
if (currentVersion >= 7) {
flags = data->readInt32(nullptr);
} else {
flags = 0;
}
addressesIpv4Download.push_back(TcpAddress(address, port, flags));
}
len = data->readUint32(nullptr);
for (uint32_t a = 0; a < len; a++) {
std::string address = data->readString(nullptr);
uint32_t port = data->readUint32(nullptr);
int32_t flags;
if (currentVersion >= 7) {
flags = data->readInt32(nullptr);
} else {
flags = 0;
}
addressesIpv6Download.push_back(TcpAddress(address, port, flags));
}
}
if (currentVersion >= 6) {
isCdnDatacenter = data->readBool(nullptr);
}
len = data->readUint32(nullptr);
if (len != 0) {
authKey = data->readBytes(len, nullptr);
}
if (currentVersion >= 4) {
authKeyId = data->readInt64(nullptr);
} else {
len = data->readUint32(nullptr);
if (len != 0) {
authKeyId = data->readInt64(nullptr);
}
}
authorized = data->readInt32(nullptr) != 0;
len = data->readUint32(nullptr);
for (uint32_t a = 0; a < len; a++) {
TL_future_salt *salt = new TL_future_salt();
salt->valid_since = data->readInt32(nullptr);
salt->valid_until = data->readInt32(nullptr);
salt->salt = data->readInt64(nullptr);
serverSalts.push_back(std::unique_ptr<TL_future_salt>(salt));
}
}
if (config == nullptr) {
config = new Config("dc" + to_string_int32(datacenterId) + "conf.dat");
}
NativeByteBuffer *buffer = config->readConfig();
if (buffer != nullptr) {
uint32_t version = buffer->readUint32(nullptr);
if (version >= 1) {
currentPortNumIpv4 = buffer->readUint32(nullptr);
currentAddressNumIpv4 = buffer->readUint32(nullptr);
currentPortNumIpv6 = buffer->readUint32(nullptr);
currentAddressNumIpv6 = buffer->readUint32(nullptr);
currentPortNumIpv4Download = buffer->readUint32(nullptr);
currentAddressNumIpv4Download = buffer->readUint32(nullptr);
currentPortNumIpv6Download = buffer->readUint32(nullptr);
currentAddressNumIpv6Download = buffer->readUint32(nullptr);
}
buffer->reuse();
} else {
currentPortNumIpv4 = 0;
currentAddressNumIpv4 = 0;
currentPortNumIpv6 = 0;
currentAddressNumIpv6 = 0;
currentPortNumIpv4Download = 0;
currentAddressNumIpv4Download = 0;
currentPortNumIpv6Download = 0;
currentAddressNumIpv6Download = 0;
}
}
void Datacenter::switchTo443Port() {
for (uint32_t a = 0; a < addressesIpv4.size(); a++) {
if (addressesIpv4[a].port == 443) {
currentAddressNumIpv4 = a;
currentPortNumIpv4 = 0;
break;
}
}
for (uint32_t a = 0; a < addressesIpv6.size(); a++) {
if (addressesIpv6[a].port == 443) {
currentAddressNumIpv6 = a;
currentPortNumIpv6 = 0;
break;
}
}
for (uint32_t a = 0; a < addressesIpv4Download.size(); a++) {
if (addressesIpv4Download[a].port == 443) {
currentAddressNumIpv4Download = a;
currentPortNumIpv4Download = 0;
break;
}
}
for (uint32_t a = 0; a < addressesIpv6Download.size(); a++) {
if (addressesIpv6Download[a].port == 443) {
currentAddressNumIpv6Download = a;
currentPortNumIpv6Download = 0;
break;
}
}
}
std::string Datacenter::getCurrentAddress(uint32_t flags) {
uint32_t currentAddressNum;
std::vector<TcpAddress> *addresses;
if (flags == 0 && !hasAuthKey() && !addressesIpv4Temp.empty()) {
flags = TcpAddressFlagTemp;
}
if ((flags & TcpAddressFlagTemp) != 0) {
currentAddressNum = currentAddressNumIpv4Temp;
addresses = &addressesIpv4Temp;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNum = currentAddressNumIpv6Download;
addresses = &addressesIpv6Download;
} else {
currentAddressNum = currentAddressNumIpv4Download;
addresses = &addressesIpv4Download;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNum = currentAddressNumIpv6;
addresses = &addressesIpv6;
} else {
currentAddressNum = currentAddressNumIpv4;
addresses = &addressesIpv4;
}
}
if (addresses->empty()) {
return std::string("");
}
if ((flags & TcpAddressFlagStatic) != 0) {
for (std::vector<TcpAddress>::iterator iter = addresses->begin(); iter != addresses->end(); iter++) {
if ((iter->flags & TcpAddressFlagStatic) != 0) {
return iter->address;
}
}
}
if (currentAddressNum >= addresses->size()) {
currentAddressNum = 0;
if ((flags & TcpAddressFlagTemp) != 0) {
currentAddressNumIpv4Temp = currentAddressNum;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNumIpv6Download = currentAddressNum;
} else {
currentAddressNumIpv4Download = currentAddressNum;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNumIpv6 = currentAddressNum;
} else {
currentAddressNumIpv4 = currentAddressNum;
}
}
}
return (*addresses)[currentAddressNum].address;
}
int32_t Datacenter::getCurrentPort(uint32_t flags) {
uint32_t currentAddressNum;
uint32_t currentPortNum;
std::vector<TcpAddress> *addresses;
if (flags == 0 && !hasAuthKey() && !addressesIpv4Temp.empty()) {
flags = TcpAddressFlagTemp;
}
if ((flags & TcpAddressFlagTemp) != 0) {
currentAddressNum = currentAddressNumIpv4Temp;
currentPortNum = currentPortNumIpv4Temp;
addresses = &addressesIpv4Temp;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNum = currentAddressNumIpv6Download;
currentPortNum = currentPortNumIpv6Download;
addresses = &addressesIpv6Download;
} else {
currentAddressNum = currentAddressNumIpv4Download;
currentPortNum = currentPortNumIpv4Download;
addresses = &addressesIpv4Download;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNum = currentAddressNumIpv6;
currentPortNum = currentPortNumIpv6;
addresses = &addressesIpv6;
} else {
currentAddressNum = currentAddressNumIpv4;
currentPortNum = currentPortNumIpv4;
addresses = &addressesIpv4;
}
}
if (addresses->empty()) {
return overridePort == -1 ? 443 : overridePort;
}
const int32_t *portsArray = overridePort == 8888 ? defaultPorts8888 : defaultPorts;
if ((flags & TcpAddressFlagStatic) != 0) {
uint32_t num = 0;
for (std::vector<TcpAddress>::iterator iter = addresses->begin(); iter != addresses->end(); iter++) {
if ((iter->flags & TcpAddressFlagStatic) != 0) {
currentAddressNum = num;
break;
}
num++;
}
}
if (currentAddressNum >= addresses->size()) {
currentAddressNum = 0;
if ((flags & TcpAddressFlagTemp) != 0) {
currentAddressNumIpv4Temp = currentAddressNum;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNumIpv6Download = currentAddressNum;
} else {
currentAddressNumIpv4Download = currentAddressNum;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentAddressNumIpv6 = currentAddressNum;
} else {
currentAddressNumIpv4 = currentAddressNum;
}
}
}
if (currentPortNum >= 11) {
currentPortNum = 0;
if ((flags & TcpAddressFlagTemp) != 0) {
currentPortNumIpv4Temp = currentAddressNum;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNumIpv6Download = currentPortNum;
} else {
currentPortNumIpv4Download = currentPortNum;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNumIpv6 = currentPortNum;
} else {
currentPortNumIpv4 = currentPortNum;
}
}
}
int32_t port = portsArray[currentPortNum];
if (port == -1) {
if (overridePort != -1) {
return overridePort;
}
return ((*addresses) [currentAddressNum]).port;
}
return port;
}
void Datacenter::addAddressAndPort(std::string address, uint32_t port, uint32_t flags) {
std::vector<TcpAddress> *addresses;
if ((flags & TcpAddressFlagTemp) != 0) {
addresses = &addressesIpv4Temp;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
addresses = &addressesIpv6Download;
} else {
addresses = &addressesIpv4Download;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
addresses = &addressesIpv6;
} else {
addresses = &addressesIpv4;
}
}
for (std::vector<TcpAddress>::iterator iter = addresses->begin(); iter != addresses->end(); iter++) {
if (iter->address == address && iter->port == port) {
return;
}
}
addresses->push_back(TcpAddress(address, port, flags));
}
void Datacenter::nextAddressOrPort(uint32_t flags) {
uint32_t currentPortNum;
uint32_t currentAddressNum;
std::vector<TcpAddress> *addresses;
if (flags == 0 && !hasAuthKey() && !addressesIpv4Temp.empty()) {
flags = TcpAddressFlagTemp;
}
if ((flags & TcpAddressFlagTemp) != 0) {
currentPortNum = currentPortNumIpv4Temp;
currentAddressNum = currentAddressNumIpv4Temp;
addresses = &addressesIpv4Temp;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNum = currentPortNumIpv6Download;
currentAddressNum = currentAddressNumIpv6Download;
addresses = &addressesIpv6Download;
} else {
currentPortNum = currentPortNumIpv4Download;
currentAddressNum = currentAddressNumIpv4Download;
addresses = &addressesIpv4Download;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNum = currentPortNumIpv6;
currentAddressNum = currentAddressNumIpv6;
addresses = &addressesIpv6;
} else {
currentPortNum = currentPortNumIpv4;
currentAddressNum = currentAddressNumIpv4;
addresses = &addressesIpv4;
}
}
if (currentPortNum + 1 < 11) {
currentPortNum++;
} else {
if (currentAddressNum + 1 < addresses->size()) {
currentAddressNum++;
} else {
currentAddressNum = 0;
}
currentPortNum = 0;
}
if ((flags & TcpAddressFlagTemp) != 0) {
currentPortNumIpv4Temp = currentPortNum;
currentAddressNumIpv4Temp = currentAddressNum;
} else if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNumIpv6Download = currentPortNum;
currentAddressNumIpv6Download = currentAddressNum;
} else {
currentPortNumIpv4Download = currentPortNum;
currentAddressNumIpv4Download = currentAddressNum;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
currentPortNumIpv6 = currentPortNum;
currentAddressNumIpv6 = currentAddressNum;
} else {
currentPortNumIpv4 = currentPortNum;
currentAddressNumIpv4 = currentAddressNum;
}
}
}
void Datacenter::storeCurrentAddressAndPortNum() {
if (config == nullptr) {
config = new Config("dc" + to_string_int32(datacenterId) + "conf.dat");
}
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(128);
buffer->writeInt32(paramsConfigVersion);
buffer->writeInt32(currentPortNumIpv4);
buffer->writeInt32(currentAddressNumIpv4);
buffer->writeInt32(currentPortNumIpv6);
buffer->writeInt32(currentAddressNumIpv6);
buffer->writeInt32(currentPortNumIpv4Download);
buffer->writeInt32(currentAddressNumIpv4Download);
buffer->writeInt32(currentPortNumIpv6Download);
buffer->writeInt32(currentAddressNumIpv6Download);
config->writeConfig(buffer);
buffer->reuse();
}
void Datacenter::resetAddressAndPortNum() {
currentPortNumIpv4 = 0;
currentAddressNumIpv4 = 0;
currentPortNumIpv6 = 0;
currentAddressNumIpv6 = 0;
currentPortNumIpv4Download = 0;
currentAddressNumIpv4Download = 0;
currentPortNumIpv6Download = 0;
currentAddressNumIpv6Download = 0;
storeCurrentAddressAndPortNum();
}
void Datacenter::replaceAddresses(std::vector<TcpAddress> &newAddresses, uint32_t flags) {
isCdnDatacenter = (flags & 8) != 0;
if ((flags & TcpAddressFlagDownload) != 0) {
if ((flags & TcpAddressFlagIpv6) != 0) {
addressesIpv6Download = newAddresses;
} else {
addressesIpv4Download = newAddresses;
}
} else {
if ((flags & TcpAddressFlagIpv6) != 0) {
addressesIpv6 = newAddresses;
} else {
addressesIpv4 = newAddresses;
}
}
}
void Datacenter::serializeToStream(NativeByteBuffer *stream) {
stream->writeInt32(configVersion);
stream->writeInt32(datacenterId);
stream->writeInt32(lastInitVersion);
size_t size;
stream->writeInt32((int32_t) (size = addressesIpv4.size()));
for (uint32_t a = 0; a < size; a++) {
stream->writeString(addressesIpv4[a].address);
stream->writeInt32(addressesIpv4[a].port);
stream->writeInt32(addressesIpv4[a].flags);
}
stream->writeInt32((int32_t) (size = addressesIpv6.size()));
for (uint32_t a = 0; a < size; a++) {
stream->writeString(addressesIpv6[a].address);
stream->writeInt32(addressesIpv6[a].port);
stream->writeInt32(addressesIpv6[a].flags);
}
stream->writeInt32((int32_t) (size = addressesIpv4Download.size()));
for (uint32_t a = 0; a < size; a++) {
stream->writeString(addressesIpv4Download[a].address);
stream->writeInt32(addressesIpv4Download[a].port);
stream->writeInt32(addressesIpv4Download[a].flags);
}
stream->writeInt32((int32_t) (size = addressesIpv6Download.size()));
for (uint32_t a = 0; a < size; a++) {
stream->writeString(addressesIpv6Download[a].address);
stream->writeInt32(addressesIpv6Download[a].port);
stream->writeInt32(addressesIpv6Download[a].flags);
}
stream->writeBool(isCdnDatacenter);
if (authKey != nullptr) {
stream->writeInt32(authKey->length);
stream->writeBytes(authKey);
} else {
stream->writeInt32(0);
}
stream->writeInt64(authKeyId);
stream->writeInt32(authorized ? 1 : 0);
stream->writeInt32((int32_t) (size = serverSalts.size()));
for (uint32_t a = 0; a < size; a++) {
stream->writeInt32(serverSalts[a]->valid_since);
stream->writeInt32(serverSalts[a]->valid_until);
stream->writeInt64(serverSalts[a]->salt);
}
}
void Datacenter::clear() {
if (authKey != nullptr) {
delete authKey;
authKey = nullptr;
}
authKeyId = 0;
authorized = false;
serverSalts.clear();
}
void Datacenter::clearServerSalts() {
serverSalts.clear();
}
int64_t Datacenter::getServerSalt() {
int32_t date = ConnectionsManager::getInstance().getCurrentTime();
bool cleanupNeeded = false;
int64_t result = 0;
int32_t maxRemainingInterval = 0;
size_t size = serverSalts.size();
for (uint32_t a = 0; a < size; a++) {
TL_future_salt *salt = serverSalts[a].get();
if (salt->valid_until < date) {
cleanupNeeded = true;
} else if (salt->valid_since <= date && salt->valid_until > date) {
if (maxRemainingInterval == 0 || abs(salt->valid_until - date) > maxRemainingInterval) {
maxRemainingInterval = abs(salt->valid_until - date);
result = salt->salt;
}
}
}
if (cleanupNeeded) {
size = serverSalts.size();
for (uint32_t i = 0; i < size; i++) {
if (serverSalts[i]->valid_until < date) {
serverSalts.erase(serverSalts.begin() + i);
size--;
i--;
}
}
}
if (result == 0) {
DEBUG_D("dc%u valid salt not found", datacenterId);
}
return result;
}
void Datacenter::mergeServerSalts(std::vector<std::unique_ptr<TL_future_salt>> &salts) {
if (salts.empty()) {
return;
}
int32_t date = ConnectionsManager::getInstance().getCurrentTime();
std::vector<int64_t> existingSalts(serverSalts.size());
size_t size = serverSalts.size();
for (uint32_t a = 0; a < size; a++) {
existingSalts.push_back(serverSalts[a]->salt);
}
bool added = false;
size = salts.size();
for (uint32_t a = 0; a < size; a++) {
int64_t value = salts[a]->salt;
if (std::find(existingSalts.begin(), existingSalts.end(), value) == existingSalts.end() && salts[a]->valid_until > date) {
serverSalts.push_back(std::unique_ptr<TL_future_salt>(std::move(salts[a])));
added = true;
}
}
if (added) {
std::sort(serverSalts.begin(), serverSalts.end(), [](const std::unique_ptr<TL_future_salt> &x, const std::unique_ptr<TL_future_salt> &y) { return x->valid_since < y->valid_since; });
}
}
void Datacenter::addServerSalt(std::unique_ptr<TL_future_salt> &serverSalt) {
size_t size = serverSalts.size();
for (uint32_t a = 0; a < size; a++) {
if (serverSalts[a]->salt == serverSalt->salt) {
return;
}
}
serverSalts.push_back(std::move(serverSalt));
std::sort(serverSalts.begin(), serverSalts.end(), [](const std::unique_ptr<TL_future_salt> &x, const std::unique_ptr<TL_future_salt> &y) { return x->valid_since < y->valid_since; });
}
bool Datacenter::containsServerSalt(int64_t value) {
size_t size = serverSalts.size();
for (uint32_t a = 0; a < size; a++) {
if (serverSalts[a]->salt == value) {
return true;
}
}
return false;
}
void Datacenter::suspendConnections() {
if (genericConnection != nullptr) {
genericConnection->suspendConnection();
}
if (tempConnection != nullptr) {
tempConnection->suspendConnection();
}
for (uint32_t a = 0; a < UPLOAD_CONNECTIONS_COUNT; a++) {
if (uploadConnection[a] != nullptr) {
uploadConnection[a]->suspendConnection();
}
}
for (uint32_t a = 0; a < DOWNLOAD_CONNECTIONS_COUNT; a++) {
if (downloadConnection[a] != nullptr) {
downloadConnection[a]->suspendConnection();
}
}
}
void Datacenter::getSessions(std::vector<int64_t> &sessions) {
if (genericConnection != nullptr) {
sessions.push_back(genericConnection->getSissionId());
}
if (tempConnection != nullptr) {
sessions.push_back(tempConnection->getSissionId());
}
for (uint32_t a = 0; a < UPLOAD_CONNECTIONS_COUNT; a++) {
if (uploadConnection[a] != nullptr) {
sessions.push_back(uploadConnection[a]->getSissionId());
}
}
for (uint32_t a = 0; a < DOWNLOAD_CONNECTIONS_COUNT; a++) {
if (downloadConnection[a] != nullptr) {
sessions.push_back(downloadConnection[a]->getSissionId());
}
}
}
void Datacenter::recreateSessions() {
if (genericConnection != nullptr) {
genericConnection->recreateSession();
}
if (tempConnection != nullptr) {
tempConnection->recreateSession();
}
for (uint32_t a = 0; a < UPLOAD_CONNECTIONS_COUNT; a++) {
if (uploadConnection[a] != nullptr) {
uploadConnection[a]->recreateSession();
}
}
for (uint32_t a = 0; a < DOWNLOAD_CONNECTIONS_COUNT; a++) {
if (downloadConnection[a] != nullptr) {
downloadConnection[a]->recreateSession();
}
}
}
Connection *Datacenter::createDownloadConnection(uint8_t num) {
if (downloadConnection[num] == nullptr) {
downloadConnection[num] = new Connection(this, ConnectionTypeDownload);
}
return downloadConnection[num];
}
Connection *Datacenter::createUploadConnection(uint8_t num) {
if (uploadConnection[num] == nullptr) {
uploadConnection[num] = new Connection(this, ConnectionTypeUpload);
}
return uploadConnection[num];
}
Connection *Datacenter::createGenericConnection() {
if (genericConnection == nullptr) {
genericConnection = new Connection(this, ConnectionTypeGeneric);
}
return genericConnection;
}
Connection *Datacenter::createPushConnection() {
if (pushConnection == nullptr) {
pushConnection = new Connection(this, ConnectionTypePush);
}
return pushConnection;
}
Connection *Datacenter::createTempConnection() {
if (tempConnection == nullptr) {
tempConnection = new Connection(this, ConnectionTypeTemp);
}
return tempConnection;
}
uint32_t Datacenter::getDatacenterId() {
return datacenterId;
}
bool Datacenter::isHandshaking() {
return handshakeState != 0;
}
void Datacenter::beginHandshake(bool reconnect) {
DEBUG_D("dc%u handshake: begin", datacenterId);
cleanupHandshake();
createGenericConnection()->recreateSession();
handshakeState = 1;
if (reconnect) {
createGenericConnection()->suspendConnection();
createGenericConnection()->connect();
}
TL_req_pq *request = new TL_req_pq();
request->nonce = std::unique_ptr<ByteArray>(new ByteArray(16));
RAND_bytes(request->nonce->bytes, 16);
authNonce = new ByteArray(request->nonce.get());
sendRequestData(request, true);
}
void Datacenter::cleanupHandshake() {
handshakeState = 0;
if (handshakeRequest != nullptr) {
delete handshakeRequest;
handshakeRequest = nullptr;
}
if (handshakeServerSalt != nullptr) {
delete handshakeServerSalt;
handshakeServerSalt = nullptr;
}
if (authNonce != nullptr) {
delete authNonce;
authNonce = nullptr;
}
if (authServerNonce != nullptr) {
delete authServerNonce;
authServerNonce = nullptr;
}
if (authNewNonce != nullptr) {
delete authNewNonce;
authNewNonce = nullptr;
}
if (handshakeAuthKey != nullptr) {
delete handshakeAuthKey;
handshakeAuthKey = nullptr;
}
}
void Datacenter::sendRequestData(TLObject *object, bool important) {
uint32_t messageLength = object->getObjectSize();
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(20 + messageLength);
buffer->writeInt64(0);
buffer->writeInt64(ConnectionsManager::getInstance().generateMessageId());
buffer->writeInt32(messageLength);
object->serializeToStream(buffer);
createGenericConnection()->sendData(buffer, false);
if (important) {
if (handshakeRequest != object) {
if (handshakeRequest != nullptr) {
delete handshakeRequest;
}
handshakeRequest = object;
}
} else {
delete object;
}
}
void Datacenter::onHandshakeConnectionClosed(Connection *connection) {
if (handshakeState == 0) {
return;
}
needResendData = true;
}
void Datacenter::onHandshakeConnectionConnected(Connection *connection) {
if (handshakeState == 0 || !needResendData) {
return;
}
beginHandshake(false);
}
inline uint64_t gcd(uint64_t a, uint64_t b) {
while (a != 0 && b != 0) {
while ((b & 1) == 0) {
b >>= 1;
}
while ((a & 1) == 0) {
a >>= 1;
}
if (a > b) {
a -= b;
} else {
b -= a;
}
}
return b == 0 ? a : b;
}
inline bool factorizeValue(uint64_t what, uint32_t &p, uint32_t &q) {
int32_t it = 0, i, j;
uint64_t g = 0;
for (i = 0; i < 3 || it < 1000; i++) {
uint64_t t = ((lrand48() & 15) + 17) % what;
uint64_t x = (long long) lrand48() % (what - 1) + 1, y = x;
int32_t lim = 1 << (i + 18);
for (j = 1; j < lim; j++) {
++it;
uint64_t a = x, b = x, c = t;
while (b) {
if (b & 1) {
c += a;
if (c >= what) {
c -= what;
}
}
a += a;
if (a >= what) {
a -= what;
}
b >>= 1;
}
x = c;
uint64_t z = x < y ? what + x - y : x - y;
g = gcd(z, what);
if (g != 1) {
break;
}
if (!(j & (j - 1))) {
y = x;
}
}
if (g > 1 && g < what) {
break;
}
}
if (g > 1 && g < what) {
p = (uint32_t) g;
q = (uint32_t) (what / g);
if (p > q) {
uint32_t tmp = p;
p = q;
q = tmp;
}
return true;
} else {
DEBUG_E("factorization failed for %llu", what);
p = 0;
q = 0;
return false;
}
}
inline bool check_prime(BIGNUM *p) {
int result = 0;
if (!BN_primality_test(&result, p, BN_prime_checks, bnContext, 0, NULL)) {
DEBUG_E("OpenSSL error at BN_primality_test");
return false;
}
return result != 0;
}
inline bool isGoodPrime(BIGNUM *p, uint32_t g) {
//TODO check against known good primes
if (g < 2 || g > 7 || BN_num_bits(p) != 2048) {
return false;
}
BIGNUM *t = BN_new();
BIGNUM *dh_g = BN_new();
if (!BN_set_word(dh_g, 4 * g)) {
DEBUG_E("OpenSSL error at BN_set_word(dh_g, 4 * g)");
BN_free(t);
BN_free(dh_g);
return false;
}
if (!BN_mod(t, p, dh_g, bnContext)) {
DEBUG_E("OpenSSL error at BN_mod");
BN_free(t);
BN_free(dh_g);
return false;
}
uint64_t x = BN_get_word(t);
if (x >= 4 * g) {
DEBUG_E("OpenSSL error at BN_get_word");
BN_free(t);
BN_free(dh_g);
return false;
}
BN_free(dh_g);
bool result = true;
switch (g) {
case 2:
if (x != 7) {
result = false;
}
break;
case 3:
if (x % 3 != 2) {
result = false;
}
break;
case 5:
if (x % 5 != 1 && x % 5 != 4) {
result = false;
}
break;
case 6:
if (x != 19 && x != 23) {
result = false;
}
break;
case 7:
if (x % 7 != 3 && x % 7 != 5 && x % 7 != 6) {
result = false;
}
break;
default:
break;
}
char *prime = BN_bn2hex(p);
static const char *goodPrime = "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";
if (!strcasecmp(prime, goodPrime)) {
delete [] prime;
BN_free(t);
return true;
}
delete [] prime;
if (!result || !check_prime(p)) {
BN_free(t);
return false;
}
BIGNUM *b = BN_new();
if (!BN_set_word(b, 2)) {
DEBUG_E("OpenSSL error at BN_set_word(b, 2)");
BN_free(b);
BN_free(t);
return false;
}
if (!BN_div(t, 0, p, b, bnContext)) {
DEBUG_E("OpenSSL error at BN_div");
BN_free(b);
BN_free(t);
return false;
}
if (!check_prime(t)) {
result = false;
}
BN_free(b);
BN_free(t);
return result;
}
inline bool isGoodGaAndGb(BIGNUM *g_a, BIGNUM *p) {
if (BN_num_bytes(g_a) > 256 || BN_num_bits(g_a) < 2048 - 64 || BN_cmp(p, g_a) <= 0) {
return false;
}
BIGNUM *dif = BN_new();
BN_sub(dif, p, g_a);
if (BN_num_bits(dif) < 2048 - 64) {
BN_free(dif);
return false;
}
BN_free(dif);
return true;
}
void Datacenter::aesIgeEncryption(uint8_t *buffer, uint8_t *key, uint8_t *iv, bool encrypt, bool changeIv, uint32_t length) {
uint8_t *ivBytes = iv;
if (!changeIv) {
ivBytes = new uint8_t[32];
memcpy(ivBytes, iv, 32);
}
AES_KEY akey;
if (!encrypt) {
AES_set_decrypt_key(key, 32 * 8, &akey);
AES_ige_encrypt(buffer, buffer, length, &akey, ivBytes, AES_DECRYPT);
} else {
AES_set_encrypt_key(key, 32 * 8, &akey);
AES_ige_encrypt(buffer, buffer, length, &akey, ivBytes, AES_ENCRYPT);
}
if (!changeIv) {
delete [] ivBytes;
}
}
void Datacenter::processHandshakeResponse(TLObject *message, int64_t messageId) {
if (handshakeState == 0) {
return;
}
const std::type_info &typeInfo = typeid(*message);
if (typeInfo == typeid(TL_resPQ)) {
if (handshakeState != 1) {
sendAckRequest(messageId);
return;
}
handshakeState = 2;
TL_resPQ *result = (TL_resPQ *) message;
if (authNonce->isEqualTo(result->nonce.get())) {
std::string key;
int64_t keyFingerprint = 0;
size_t count1 = result->server_public_key_fingerprints.size();
if (isCdnDatacenter) {
std::map<int32_t, uint64_t>::iterator iter = cdnPublicKeysFingerprints.find(datacenterId);
if (iter != cdnPublicKeysFingerprints.end()) {
for (uint32_t a = 0; a < count1; a++) {
if ((uint64_t) result->server_public_key_fingerprints[a] == iter->second) {
keyFingerprint = iter->second;
key = cdnPublicKeys[datacenterId];
}
}
}
} else {
if (serverPublicKeys.empty()) {
serverPublicKeys.push_back("-----BEGIN RSA PUBLIC KEY-----\n"
"MIIBCgKCAQEAwVACPi9w23mF3tBkdZz+zwrzKOaaQdr01vAbU4E1pvkfj4sqDsm6\n"
"lyDONS789sVoD/xCS9Y0hkkC3gtL1tSfTlgCMOOul9lcixlEKzwKENj1Yz/s7daS\n"
"an9tqw3bfUV/nqgbhGX81v/+7RFAEd+RwFnK7a+XYl9sluzHRyVVaTTveB2GazTw\n"
"Efzk2DWgkBluml8OREmvfraX3bkHZJTKX4EQSjBbbdJ2ZXIsRrYOXfaA+xayEGB+\n"
"8hdlLmAjbCVfaigxX0CDqWeR1yFL9kwd9P0NsZRPsmoqVwMbMu7mStFai6aIhc3n\n"
"Slv8kg9qv1m6XHVQY3PnEw+QQtqSIXklHwIDAQAB\n"
"-----END RSA PUBLIC KEY-----");
serverPublicKeysFingerprints.push_back(0xc3b42b026ce86b21LL);
serverPublicKeys.push_back("-----BEGIN RSA PUBLIC KEY-----\n"
"MIIBCgKCAQEAxq7aeLAqJR20tkQQMfRn+ocfrtMlJsQ2Uksfs7Xcoo77jAid0bRt\n"
"ksiVmT2HEIJUlRxfABoPBV8wY9zRTUMaMA654pUX41mhyVN+XoerGxFvrs9dF1Ru\n"
"vCHbI02dM2ppPvyytvvMoefRoL5BTcpAihFgm5xCaakgsJ/tH5oVl74CdhQw8J5L\n"
"xI/K++KJBUyZ26Uba1632cOiq05JBUW0Z2vWIOk4BLysk7+U9z+SxynKiZR3/xdi\n"
"XvFKk01R3BHV+GUKM2RYazpS/P8v7eyKhAbKxOdRcFpHLlVwfjyM1VlDQrEZxsMp\n"
"NTLYXb6Sce1Uov0YtNx5wEowlREH1WOTlwIDAQAB\n"
"-----END RSA PUBLIC KEY-----");
serverPublicKeysFingerprints.push_back(0x9a996a1db11c729bLL);
serverPublicKeys.push_back("-----BEGIN RSA PUBLIC KEY-----\n"
"MIIBCgKCAQEAsQZnSWVZNfClk29RcDTJQ76n8zZaiTGuUsi8sUhW8AS4PSbPKDm+\n"
"DyJgdHDWdIF3HBzl7DHeFrILuqTs0vfS7Pa2NW8nUBwiaYQmPtwEa4n7bTmBVGsB\n"
"1700/tz8wQWOLUlL2nMv+BPlDhxq4kmJCyJfgrIrHlX8sGPcPA4Y6Rwo0MSqYn3s\n"
"g1Pu5gOKlaT9HKmE6wn5Sut6IiBjWozrRQ6n5h2RXNtO7O2qCDqjgB2vBxhV7B+z\n"
"hRbLbCmW0tYMDsvPpX5M8fsO05svN+lKtCAuz1leFns8piZpptpSCFn7bWxiA9/f\n"
"x5x17D7pfah3Sy2pA+NDXyzSlGcKdaUmwQIDAQAB\n"
"-----END RSA PUBLIC KEY-----");
serverPublicKeysFingerprints.push_back(0xb05b2a6f70cdea78LL);
serverPublicKeys.push_back("-----BEGIN RSA PUBLIC KEY-----\n"
"MIIBCgKCAQEAwqjFW0pi4reKGbkc9pK83Eunwj/k0G8ZTioMMPbZmW99GivMibwa\n"
"xDM9RDWabEMyUtGoQC2ZcDeLWRK3W8jMP6dnEKAlvLkDLfC4fXYHzFO5KHEqF06i\n"
"qAqBdmI1iBGdQv/OQCBcbXIWCGDY2AsiqLhlGQfPOI7/vvKc188rTriocgUtoTUc\n"
"/n/sIUzkgwTqRyvWYynWARWzQg0I9olLBBC2q5RQJJlnYXZwyTL3y9tdb7zOHkks\n"
"WV9IMQmZmyZh/N7sMbGWQpt4NMchGpPGeJ2e5gHBjDnlIf2p1yZOYeUYrdbwcS0t\n"
"UiggS4UeE8TzIuXFQxw7fzEIlmhIaq3FnwIDAQAB\n"
"-----END RSA PUBLIC KEY-----");
serverPublicKeysFingerprints.push_back(0x71e025b6c76033e3LL);
}
size_t count2 = serverPublicKeysFingerprints.size();
for (uint32_t a = 0; a < count1; a++) {
for (uint32_t b = 0; b < count2; b++) {
if ((uint64_t) result->server_public_key_fingerprints[a] == serverPublicKeysFingerprints[b]) {
keyFingerprint = result->server_public_key_fingerprints[a];
key = serverPublicKeys[a];
break;
}
}
if (keyFingerprint != 0) {
break;
}
}
}
if (keyFingerprint == 0) {
if (isCdnDatacenter) {
DEBUG_D("dc%u handshake: can't find valid cdn server public key", datacenterId);
loadCdnConfig(this);
} else {
DEBUG_E("dc%u handshake: can't find valid server public key", datacenterId);
beginHandshake(false);
}
return;
}
authServerNonce = new ByteArray(result->server_nonce.get());
//TODO run in different thread?
uint64_t pq = ((uint64_t) (result->pq->bytes[0] & 0xff) << 56) |
((uint64_t) (result->pq->bytes[1] & 0xff) << 48) |
((uint64_t) (result->pq->bytes[2] & 0xff) << 40) |
((uint64_t) (result->pq->bytes[3] & 0xff) << 32) |
((uint64_t) (result->pq->bytes[4] & 0xff) << 24) |
((uint64_t) (result->pq->bytes[5] & 0xff) << 16) |
((uint64_t) (result->pq->bytes[6] & 0xff) << 8) |
((uint64_t) (result->pq->bytes[7] & 0xff));
uint32_t p, q;
if (!factorizeValue(pq, p, q)) {
beginHandshake(false);
return;
}
TL_req_DH_params *request = new TL_req_DH_params();
request->nonce = std::unique_ptr<ByteArray>(new ByteArray(authNonce));
request->server_nonce = std::unique_ptr<ByteArray>(new ByteArray(authServerNonce));
request->p = std::unique_ptr<ByteArray>(new ByteArray(4));
request->p->bytes[3] = (uint8_t) p;
request->p->bytes[2] = (uint8_t) (p >> 8);
request->p->bytes[1] = (uint8_t) (p >> 16);
request->p->bytes[0] = (uint8_t) (p >> 24);
request->q = std::unique_ptr<ByteArray>(new ByteArray(4));
request->q->bytes[3] = (uint8_t) q;
request->q->bytes[2] = (uint8_t) (q >> 8);
request->q->bytes[1] = (uint8_t) (q >> 16);
request->q->bytes[0] = (uint8_t) (q >> 24);
request->public_key_fingerprint = keyFingerprint;
TL_p_q_inner_data *innerData = new TL_p_q_inner_data();
innerData->nonce = std::unique_ptr<ByteArray>(new ByteArray(authNonce));
innerData->server_nonce = std::unique_ptr<ByteArray>(new ByteArray(authServerNonce));
innerData->pq = std::unique_ptr<ByteArray>(new ByteArray(result->pq.get()));
innerData->p = std::unique_ptr<ByteArray>(new ByteArray(request->p.get()));
innerData->q = std::unique_ptr<ByteArray>(new ByteArray(request->q.get()));
innerData->new_nonce = std::unique_ptr<ByteArray>(new ByteArray(32));
RAND_bytes(innerData->new_nonce->bytes, 32);
authNewNonce = new ByteArray(innerData->new_nonce.get());
uint32_t innerDataSize = innerData->getObjectSize();
uint32_t additionalSize = innerDataSize + SHA_DIGEST_LENGTH < 255 ? 255 - (innerDataSize + SHA_DIGEST_LENGTH) : 0;
NativeByteBuffer *innerDataBuffer = BuffersStorage::getInstance().getFreeBuffer(innerDataSize + additionalSize + SHA_DIGEST_LENGTH);
innerDataBuffer->position(SHA_DIGEST_LENGTH);
innerData->serializeToStream(innerDataBuffer);
delete innerData;
SHA1(innerDataBuffer->bytes() + SHA_DIGEST_LENGTH, innerDataSize, innerDataBuffer->bytes());
if (additionalSize != 0) {
RAND_bytes(innerDataBuffer->bytes() + SHA_DIGEST_LENGTH + innerDataSize, additionalSize);
}
BIO *keyBio = BIO_new(BIO_s_mem());
BIO_write(keyBio, key.c_str(), (int) key.length());
RSA *rsaKey = PEM_read_bio_RSAPublicKey(keyBio, NULL, NULL, NULL);
BIO_free(keyBio);
if (bnContext == nullptr) {
bnContext = BN_CTX_new();
}
BIGNUM *a = BN_bin2bn(innerDataBuffer->bytes(), innerDataBuffer->limit(), NULL);
BIGNUM *r = BN_new();
BN_mod_exp(r, a, rsaKey->e, rsaKey->n, bnContext);
uint32_t size = BN_num_bytes(r);
ByteArray *rsaEncryptedData = new ByteArray(size >= 256 ? size : 256);
size_t resLen = BN_bn2bin(r, rsaEncryptedData->bytes);
if (256 - resLen > 0) {
memset(rsaEncryptedData + resLen, 0, 256 - resLen);
}
BN_free(a);
BN_free(r);
RSA_free(rsaKey);
innerDataBuffer->reuse();
request->encrypted_data = std::unique_ptr<ByteArray>(rsaEncryptedData);
sendAckRequest(messageId);
sendRequestData(request, true);
} else {
DEBUG_E("dc%u handshake: invalid client nonce", datacenterId);
beginHandshake(false);
}
} else if (dynamic_cast<Server_DH_Params *>(message)) {
if (typeInfo == typeid(TL_server_DH_params_ok)) {
if (handshakeState != 2) {
sendAckRequest(messageId);
return;
}
handshakeState = 3;
TL_server_DH_params_ok *result = (TL_server_DH_params_ok *) message;
NativeByteBuffer *tmpAesKeyAndIv = BuffersStorage::getInstance().getFreeBuffer(84);
NativeByteBuffer *newNonceAndServerNonce = BuffersStorage::getInstance().getFreeBuffer(authNewNonce->length + authServerNonce->length);
newNonceAndServerNonce->writeBytes(authNewNonce);
newNonceAndServerNonce->writeBytes(authServerNonce);
SHA1(newNonceAndServerNonce->bytes(), newNonceAndServerNonce->limit(), tmpAesKeyAndIv->bytes());
newNonceAndServerNonce->reuse();
NativeByteBuffer *serverNonceAndNewNonce = BuffersStorage::getInstance().getFreeBuffer(authServerNonce->length + authNewNonce->length);
serverNonceAndNewNonce->writeBytes(authServerNonce);
serverNonceAndNewNonce->writeBytes(authNewNonce);
SHA1(serverNonceAndNewNonce->bytes(), serverNonceAndNewNonce->limit(), tmpAesKeyAndIv->bytes() + 20);
serverNonceAndNewNonce->reuse();
NativeByteBuffer *newNonceAndNewNonce = BuffersStorage::getInstance().getFreeBuffer(authNewNonce->length + authNewNonce->length);
newNonceAndNewNonce->writeBytes(authNewNonce);
newNonceAndNewNonce->writeBytes(authNewNonce);
SHA1(newNonceAndNewNonce->bytes(), newNonceAndNewNonce->limit(), tmpAesKeyAndIv->bytes() + 40);
newNonceAndNewNonce->reuse();
memcpy(tmpAesKeyAndIv->bytes() + 60, authNewNonce->bytes, 4);
aesIgeEncryption(result->encrypted_answer->bytes, tmpAesKeyAndIv->bytes(), tmpAesKeyAndIv->bytes() + 32, false, false, result->encrypted_answer->length);
bool hashVerified = false;
for (uint32_t i = 0; i < 16; i++) {
SHA1(result->encrypted_answer->bytes + SHA_DIGEST_LENGTH, result->encrypted_answer->length - i - SHA_DIGEST_LENGTH, tmpAesKeyAndIv->bytes() + 64);
if (!memcmp(tmpAesKeyAndIv->bytes() + 64, result->encrypted_answer->bytes, SHA_DIGEST_LENGTH)) {
hashVerified = true;
break;
}
}
if (!hashVerified) {
DEBUG_E("dc%u handshake: can't decode DH params", datacenterId);
beginHandshake(false);
return;
}
bool error = false;
NativeByteBuffer *answerWithHash = new NativeByteBuffer(result->encrypted_answer->bytes + SHA_DIGEST_LENGTH, result->encrypted_answer->length - SHA_DIGEST_LENGTH);
uint32_t constructor = answerWithHash->readUint32(&error);
TL_server_DH_inner_data *dhInnerData = TL_server_DH_inner_data::TLdeserialize(answerWithHash, constructor, error);
delete answerWithHash;
if (error) {
DEBUG_E("dc%u handshake: can't parse decoded DH params", datacenterId);
beginHandshake(false);
return;
}
if (!authNonce->isEqualTo(dhInnerData->nonce.get())) {
DEBUG_E("dc%u handshake: invalid DH nonce", datacenterId);
beginHandshake(false);
return;
}
if (!authServerNonce->isEqualTo(dhInnerData->server_nonce.get())) {
DEBUG_E("dc%u handshake: invalid DH server nonce", datacenterId);
beginHandshake(false);
return;
}
BIGNUM *p = BN_bin2bn(dhInnerData->dh_prime->bytes, dhInnerData->dh_prime->length, NULL);
if (p == nullptr) {
DEBUG_E("can't allocate BIGNUM p");
exit(1);
}
if (!isGoodPrime(p, dhInnerData->g)) {
DEBUG_E("dc%u handshake: bad prime", datacenterId);
beginHandshake(false);
BN_free(p);
return;
}
BIGNUM *g_a = BN_new();
if (g_a == nullptr) {
DEBUG_E("can't allocate BIGNUM g_a");
exit(1);
}
BN_bin2bn(dhInnerData->g_a->bytes, dhInnerData->g_a->length, g_a);
if (!isGoodGaAndGb(g_a, p)) {
DEBUG_E("dc%u handshake: bad prime and g_a", datacenterId);
beginHandshake(false);
BN_free(p);
BN_free(g_a);
return;
}
BIGNUM *g = BN_new();
if (g == nullptr) {
DEBUG_E("can't allocate BIGNUM g");
exit(1);
}
if (!BN_set_word(g, dhInnerData->g)) {
DEBUG_E("OpenSSL error at BN_set_word(g_b, dhInnerData->g)");
beginHandshake(false);
BN_free(g);
BN_free(g_a);
BN_free(p);
return;
}
static uint8_t bytes[256];
RAND_bytes(bytes, 256);
BIGNUM *b = BN_bin2bn(bytes, 256, NULL);
if (b == nullptr) {
DEBUG_E("can't allocate BIGNUM b");
exit(1);
}
BIGNUM *g_b = BN_new();
if (!BN_mod_exp(g_b, g, b, p, bnContext)) {
DEBUG_E("OpenSSL error at BN_mod_exp(g_b, g, b, p, bnContext)");
beginHandshake(false);
BN_free(g);
BN_free(g_a);
BN_free(g_b);
BN_free(b);
BN_free(p);
return;
}
TL_client_DH_inner_data *clientInnerData = new TL_client_DH_inner_data();
clientInnerData->g_b = std::unique_ptr<ByteArray>(new ByteArray(BN_num_bytes(g_b)));
BN_bn2bin(g_b, clientInnerData->g_b->bytes);
clientInnerData->nonce = std::unique_ptr<ByteArray>(new ByteArray(authNonce));
clientInnerData->server_nonce = std::unique_ptr<ByteArray>(new ByteArray(authServerNonce));
clientInnerData->retry_id = 0;
BN_free(g_b);
BN_free(g);
BIGNUM *authKeyNum = BN_new();
BN_mod_exp(authKeyNum, g_a, b, p, bnContext);
size_t l = BN_num_bytes(authKeyNum);
handshakeAuthKey = new ByteArray(256);
BN_bn2bin(authKeyNum, handshakeAuthKey->bytes);
if (l < 256) {
memmove(handshakeAuthKey->bytes + 256 - l, handshakeAuthKey->bytes, l);
memset(handshakeAuthKey->bytes, 0, 256 - l);
}
BN_free(authKeyNum);
BN_free(g_a);
BN_free(b);
BN_free(p);
uint32_t clientInnerDataSize = clientInnerData->getObjectSize();
uint32_t additionalSize = (clientInnerDataSize + SHA_DIGEST_LENGTH) % 16;
if (additionalSize != 0) {
additionalSize = 16 - additionalSize;
}
NativeByteBuffer *clientInnerDataBuffer = BuffersStorage::getInstance().getFreeBuffer(clientInnerDataSize + additionalSize + SHA_DIGEST_LENGTH);
clientInnerDataBuffer->position(SHA_DIGEST_LENGTH);
clientInnerData->serializeToStream(clientInnerDataBuffer);
delete clientInnerData;
SHA1(clientInnerDataBuffer->bytes() + SHA_DIGEST_LENGTH, clientInnerDataSize, clientInnerDataBuffer->bytes());
if (additionalSize != 0) {
RAND_bytes(clientInnerDataBuffer->bytes() + SHA_DIGEST_LENGTH + clientInnerDataSize, additionalSize);
}
TL_set_client_DH_params *setClientDhParams = new TL_set_client_DH_params();
setClientDhParams->nonce = std::unique_ptr<ByteArray>(new ByteArray(authNonce));
setClientDhParams->server_nonce = std::unique_ptr<ByteArray>(new ByteArray(authServerNonce));
aesIgeEncryption(clientInnerDataBuffer->bytes(), tmpAesKeyAndIv->bytes(), tmpAesKeyAndIv->bytes() + 32, true, false, clientInnerDataBuffer->limit());
setClientDhParams->encrypted_data = std::unique_ptr<ByteArray>(new ByteArray(clientInnerDataBuffer->bytes(), clientInnerDataBuffer->limit()));
clientInnerDataBuffer->reuse();
tmpAesKeyAndIv->reuse();
sendAckRequest(messageId);
sendRequestData(setClientDhParams, true);
int32_t currentTime = (int32_t) (ConnectionsManager::getInstance().getCurrentTimeMillis() / 1000);
timeDifference = dhInnerData->server_time - currentTime;
handshakeServerSalt = new TL_future_salt();
handshakeServerSalt->valid_since = currentTime + timeDifference - 5;
handshakeServerSalt->valid_until = handshakeServerSalt->valid_since + 30 * 60;
for (int32_t a = 7; a >= 0; a--) {
handshakeServerSalt->salt <<= 8;
handshakeServerSalt->salt |= (authNewNonce->bytes[a] ^ authServerNonce->bytes[a]);
}
} else {
DEBUG_E("dc%u handshake: can't set DH params", datacenterId);
beginHandshake(false);
}
} else if (dynamic_cast<Set_client_DH_params_answer *>(message)) {
if (handshakeState != 3) {
sendAckRequest(messageId);
return;
}
handshakeState = 4;
Set_client_DH_params_answer *result = (Set_client_DH_params_answer *) message;
if (!authNonce->isEqualTo(result->nonce.get())) {
DEBUG_E("dc%u handshake: invalid DH answer nonce", datacenterId);
beginHandshake(false);
return;
}
if (!authServerNonce->isEqualTo(result->server_nonce.get())) {
DEBUG_E("dc%u handshake: invalid DH answer server nonce", datacenterId);
beginHandshake(false);
return;
}
sendAckRequest(messageId);
uint32_t authKeyAuxHashLength = authNewNonce->length + SHA_DIGEST_LENGTH + 1;
NativeByteBuffer *authKeyAuxHashBuffer = BuffersStorage::getInstance().getFreeBuffer(authKeyAuxHashLength + SHA_DIGEST_LENGTH);
authKeyAuxHashBuffer->writeBytes(authNewNonce);
SHA1(handshakeAuthKey->bytes, handshakeAuthKey->length, authKeyAuxHashBuffer->bytes() + authNewNonce->length + 1);
if (typeInfo == typeid(TL_dh_gen_ok)) {
authKeyAuxHashBuffer->writeByte(1);
SHA1(authKeyAuxHashBuffer->bytes(), authKeyAuxHashLength - 12, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength);
if (memcmp(result->new_nonce_hash1->bytes, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength + SHA_DIGEST_LENGTH - 16, 16)) {
DEBUG_E("dc%u handshake: invalid DH answer nonce hash 1", datacenterId);
authKeyAuxHashBuffer->reuse();
beginHandshake(false);
} else {
DEBUG_D("dc%u handshake: completed, time difference = %d", datacenterId, timeDifference);
authKey = handshakeAuthKey;
handshakeAuthKey = nullptr;
authKeyAuxHashBuffer->position(authNewNonce->length + 1 + 12);
authKeyId = authKeyAuxHashBuffer->readInt64(nullptr);
std::unique_ptr<TL_future_salt> salt = std::unique_ptr<TL_future_salt>(handshakeServerSalt);
addServerSalt(salt);
handshakeServerSalt = nullptr;
ConnectionsManager::getInstance().onDatacenterHandshakeComplete(this, timeDifference);
cleanupHandshake();
}
authKeyAuxHashBuffer->reuse();
} else if (typeInfo == typeid(TL_dh_gen_retry)) {
authKeyAuxHashBuffer->writeByte(2);
SHA1(authKeyAuxHashBuffer->bytes(), authKeyAuxHashLength - 12, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength);
if (memcmp(result->new_nonce_hash2->bytes, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength + SHA_DIGEST_LENGTH - 16, 16)) {
DEBUG_E("dc%u handshake: invalid DH answer nonce hash 2", datacenterId);
beginHandshake(false);
} else {
DEBUG_D("dc%u handshake: retry DH", datacenterId);
beginHandshake(false);
}
authKeyAuxHashBuffer->reuse();
} else if (typeInfo == typeid(TL_dh_gen_fail)) {
authKeyAuxHashBuffer->writeByte(3);
SHA1(authKeyAuxHashBuffer->bytes(), authKeyAuxHashLength - 12, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength);
if (memcmp(result->new_nonce_hash3->bytes, authKeyAuxHashBuffer->bytes() + authKeyAuxHashLength + SHA_DIGEST_LENGTH - 16, 16)) {
DEBUG_E("dc%u handshake: invalid DH answer nonce hash 3", datacenterId);
beginHandshake(false);
} else {
DEBUG_E("dc%u handshake: server declined DH params", datacenterId);
beginHandshake(false);
}
authKeyAuxHashBuffer->reuse();
}
}
}
TLObject *Datacenter::getCurrentHandshakeRequest() {
return handshakeRequest;
}
void Datacenter::sendAckRequest(int64_t messageId) {
TL_msgs_ack *msgsAck = new TL_msgs_ack();
msgsAck->msg_ids.push_back(messageId);
sendRequestData(msgsAck, false);
}
inline void generateMessageKey(uint8_t *authKey, uint8_t *messageKey, uint8_t *result, bool incoming) {
uint32_t x = incoming ? 8 : 0;
static uint8_t sha[68];
switch (ConnectionsManager::getInstance().getMtProtoVersion()) {
case 2:
SHA256_Init(&sha256Ctx);
SHA256_Update(&sha256Ctx, messageKey, 16);
SHA256_Update(&sha256Ctx, authKey + x, 36);
SHA256_Final(sha, &sha256Ctx);
SHA256_Init(&sha256Ctx);
SHA256_Update(&sha256Ctx, authKey + 40 + x, 36);
SHA256_Update(&sha256Ctx, messageKey, 16);
SHA256_Final(sha + 32, &sha256Ctx);
memcpy(result, sha, 8);
memcpy(result + 8, sha + 32 + 8, 16);
memcpy(result + 8 + 16, sha + 24, 8);
memcpy(result + 32, sha + 32, 8);
memcpy(result + 32 + 8, sha + 8, 16);
memcpy(result + 32 + 8 + 16, sha + 32 + 24, 8);
break;
default:
memcpy(sha + 20, messageKey, 16);
memcpy(sha + 20 + 16, authKey + x, 32);
SHA1(sha + 20, 48, sha);
memcpy(result, sha, 8);
memcpy(result + 32, sha + 8, 12);
memcpy(sha + 20, authKey + 32 + x, 16);
memcpy(sha + 20 + 16, messageKey, 16);
memcpy(sha + 20 + 16 + 16, authKey + 48 + x, 16);
SHA1(sha + 20, 48, sha);
memcpy(result + 8, sha + 8, 12);
memcpy(result + 32 + 12, sha, 8);
memcpy(sha + 20, authKey + 64 + x, 32);
memcpy(sha + 20 + 32, messageKey, 16);
SHA1(sha + 20, 48, sha);
memcpy(result + 8 + 12, sha + 4, 12);
memcpy(result + 32 + 12 + 8, sha + 16, 4);
memcpy(sha + 20, messageKey, 16);
memcpy(sha + 20 + 16, authKey + 96 + x, 32);
SHA1(sha + 20, 48, sha);
memcpy(result + 32 + 12 + 8 + 4, sha, 8);
break;
}
}
NativeByteBuffer *Datacenter::createRequestsData(std::vector<std::unique_ptr<NetworkMessage>> &requests, int32_t *quickAckId, Connection *connection) {
if (authKey == nullptr || connection == nullptr) {
return nullptr;
}
int64_t messageId;
TLObject *messageBody;
bool freeMessageBody = false;
int32_t messageSeqNo;
if (requests.size() == 1) {
NetworkMessage *networkMessage = requests[0].get();
if (networkMessage->message->outgoingBody != nullptr) {
messageBody = networkMessage->message->outgoingBody;
} else {
messageBody = networkMessage->message->body.get();
}
DEBUG_D("connection(%p, dc%u, type %d) send message (session: 0x%llx, seqno: %d, messageid: 0x%llx): %s(%p)", connection, datacenterId, connection->getConnectionType(), (uint64_t) connection->getSissionId(), networkMessage->message->seqno, (uint64_t) networkMessage->message->msg_id, typeid(*messageBody).name(), messageBody);
int64_t messageTime = (int64_t) (networkMessage->message->msg_id / 4294967296.0 * 1000);
int64_t currentTime = ConnectionsManager::getInstance().getCurrentTimeMillis() + (int64_t) ConnectionsManager::getInstance().getTimeDifference() * 1000;
if (messageTime < currentTime - 30000 || messageTime > currentTime + 25000) {
DEBUG_D("wrap message in container");
TL_msg_container *messageContainer = new TL_msg_container();
messageContainer->messages.push_back(std::move(networkMessage->message));
messageId = ConnectionsManager::getInstance().generateMessageId();
messageBody = messageContainer;
messageSeqNo = connection->generateMessageSeqNo(false);
freeMessageBody = true;
} else {
messageId = networkMessage->message->msg_id;
messageSeqNo = networkMessage->message->seqno;
}
} else {
DEBUG_D("start write messages to container");
TL_msg_container *messageContainer = new TL_msg_container();
size_t count = requests.size();
for (uint32_t a = 0; a < count; a++) {
NetworkMessage *networkMessage = requests[a].get();
if (networkMessage->message->outgoingBody != nullptr) {
messageBody = networkMessage->message->outgoingBody;
} else {
messageBody = networkMessage->message->body.get();
}
DEBUG_D("connection(%p, dc%u, type %d) send message (session: 0x%llx, seqno: %d, messageid: 0x%llx): %s(%p)", connection, datacenterId, connection->getConnectionType(), (uint64_t) connection->getSissionId(), networkMessage->message->seqno, (uint64_t) networkMessage->message->msg_id, typeid(*messageBody).name(), messageBody);
messageContainer->messages.push_back(std::unique_ptr<TL_message>(std::move(networkMessage->message)));
}
messageId = ConnectionsManager::getInstance().generateMessageId();
messageBody = messageContainer;
freeMessageBody = true;
messageSeqNo = connection->generateMessageSeqNo(false);
}
int32_t mtProtoVersion = ConnectionsManager::getInstance().getMtProtoVersion();
uint32_t messageSize = messageBody->getObjectSize();
uint32_t additionalSize = (32 + messageSize) % 16;
if (additionalSize != 0) {
additionalSize = 16 - additionalSize;
}
if (mtProtoVersion == 2 && additionalSize < 12) {
additionalSize += 16;
}
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(24 + 32 + messageSize + additionalSize);
buffer->writeInt64(authKeyId);
buffer->position(24);
buffer->writeInt64(getServerSalt());
buffer->writeInt64(connection->getSissionId());
buffer->writeInt64(messageId);
buffer->writeInt32(messageSeqNo);
buffer->writeInt32(messageSize);
messageBody->serializeToStream(buffer);
if (freeMessageBody) {
delete messageBody;
}
if (additionalSize != 0) {
RAND_bytes(buffer->bytes() + 24 + 32 + messageSize, additionalSize);
}
static uint8_t messageKey[96];
switch (mtProtoVersion) {
case 2: {
SHA256_Init(&sha256Ctx);
SHA256_Update(&sha256Ctx, authKey->bytes + 88, 32);
SHA256_Update(&sha256Ctx, buffer->bytes() + 24, 32 + messageSize + additionalSize);
SHA256_Final(messageKey, &sha256Ctx);
if (quickAckId != nullptr) {
*quickAckId = (((messageKey[0] & 0xff)) |
((messageKey[1] & 0xff) << 8) |
((messageKey[2] & 0xff) << 16) |
((messageKey[3] & 0xff) << 24)) & 0x7fffffff;
}
break;
}
default: {
SHA1(buffer->bytes() + 24, 32 + messageSize, messageKey + 4);
if (quickAckId != nullptr) {
*quickAckId = (((messageKey[4] & 0xff)) |
((messageKey[5] & 0xff) << 8) |
((messageKey[6] & 0xff) << 16) |
((messageKey[7] & 0xff) << 24)) & 0x7fffffff;
}
break;
}
}
memcpy(buffer->bytes() + 8, messageKey + 8, 16);
generateMessageKey(authKey->bytes, messageKey + 8, messageKey + 32, false);
aesIgeEncryption(buffer->bytes() + 24, messageKey + 32, messageKey + 64, true, false, buffer->limit() - 24);
return buffer;
}
bool Datacenter::decryptServerResponse(int64_t keyId, uint8_t *key, uint8_t *data, uint32_t length) {
bool error = false;
if (authKeyId != keyId) {
error = true;
}
static uint8_t messageKey[96];
generateMessageKey(authKey->bytes, key, messageKey + 32, true);
aesIgeEncryption(data, messageKey + 32, messageKey + 64, false, false, length);
uint32_t messageLength;
memcpy(&messageLength, data + 28, sizeof(uint32_t));
if (messageLength > length - 32) {
error = true;
}
messageLength += 32;
if (messageLength > length) {
messageLength = length;
}
switch (ConnectionsManager::getInstance().getMtProtoVersion()) {
case 2: {
SHA256_Init(&sha256Ctx);
SHA256_Update(&sha256Ctx, authKey->bytes + 88 + 8, 32);
SHA256_Update(&sha256Ctx, data, length);
SHA256_Final(messageKey, &sha256Ctx);
break;
}
default: {
SHA1(data, messageLength, messageKey + 4);
break;
}
}
return memcmp(messageKey + 8, key, 16) == 0 && !error;
}
bool Datacenter::hasAuthKey() {
return authKey != nullptr;
}
Connection *Datacenter::createConnectionByType(uint32_t connectionType) {
uint8_t connectionNum = (uint8_t) (connectionType >> 16);
connectionType = connectionType & 0x0000ffff;
switch (connectionType) {
case ConnectionTypeGeneric:
return createGenericConnection();
case ConnectionTypeDownload:
return createDownloadConnection(connectionNum);
case ConnectionTypeUpload:
return createUploadConnection(connectionNum);
case ConnectionTypePush:
return createPushConnection();
case ConnectionTypeTemp:
return createTempConnection();
default:
return nullptr;
}
}
Connection *Datacenter::getDownloadConnection(uint8_t num, bool create) {
if (authKey == nullptr) {
return nullptr;
}
if (create) {
createDownloadConnection(num)->connect();
}
return downloadConnection[num];
}
Connection *Datacenter::getUploadConnection(uint8_t num, bool create) {
if (authKey == nullptr) {
return nullptr;
}
if (create) {
createUploadConnection(num)->connect();
}
return uploadConnection[num];
}
Connection *Datacenter::getGenericConnection(bool create) {
if (authKey == nullptr) {
return nullptr;
}
if (create) {
createGenericConnection()->connect();
}
return genericConnection;
}
Connection *Datacenter::getPushConnection(bool create) {
if (authKey == nullptr) {
return nullptr;
}
if (create) {
createPushConnection()->connect();
}
return pushConnection;
}
Connection *Datacenter::getTempConnection(bool create) {
if (authKey == nullptr) {
return nullptr;
}
if (create) {
createTempConnection()->connect();
}
return tempConnection;
}
Connection *Datacenter::getConnectionByType(uint32_t connectionType, bool create) {
uint8_t connectionNum = (uint8_t) (connectionType >> 16);
connectionType = connectionType & 0x0000ffff;
switch (connectionType) {
case ConnectionTypeGeneric:
return getGenericConnection(create);
case ConnectionTypeDownload:
return getDownloadConnection(connectionNum, create);
case ConnectionTypeUpload:
return getUploadConnection(connectionNum, create);
case ConnectionTypePush:
return getPushConnection(create);
case ConnectionTypeTemp:
return getTempConnection(create);
default:
return nullptr;
}
}
void Datacenter::exportAuthorization() {
if (exportingAuthorization || isCdnDatacenter) {
return;
}
exportingAuthorization = true;
TL_auth_exportAuthorization *request = new TL_auth_exportAuthorization();
request->dc_id = datacenterId;
DEBUG_D("dc%u begin export authorization", datacenterId);
ConnectionsManager::getInstance().sendRequest(request, [&](TLObject *response, TL_error *error, int32_t networkType) {
if (error == nullptr) {
TL_auth_exportedAuthorization *res = (TL_auth_exportedAuthorization *) response;
TL_auth_importAuthorization *request2 = new TL_auth_importAuthorization();
request2->bytes = std::move(res->bytes);
request2->id = res->id;
DEBUG_D("dc%u begin import authorization", datacenterId);
ConnectionsManager::getInstance().sendRequest(request2, [&](TLObject *response2, TL_error *error2, int32_t networkType) {
if (error2 == nullptr) {
authorized = true;
ConnectionsManager::getInstance().onDatacenterExportAuthorizationComplete(this);
} else {
DEBUG_D("dc%u failed import authorization", datacenterId);
}
exportingAuthorization = false;
}, nullptr, RequestFlagEnableUnauthorized | RequestFlagWithoutLogin, datacenterId, ConnectionTypeGeneric, true);
} else {
DEBUG_D("dc%u failed export authorization", datacenterId);
exportingAuthorization = false;
}
}, nullptr, 0, DEFAULT_DATACENTER_ID, ConnectionTypeGeneric, true);
}
bool Datacenter::isExportingAuthorization() {
return exportingAuthorization;
}
void Datacenter::saveCdnConfigInternal(NativeByteBuffer *buffer) {
buffer->writeInt32(1);
buffer->writeInt32(cdnPublicKeys.size());
for (std::map<int32_t, std::string>::iterator iter = cdnPublicKeys.begin(); iter != cdnPublicKeys.end(); iter++) {
buffer->writeInt32(iter->first);
buffer->writeString(iter->second);
buffer->writeInt64(cdnPublicKeysFingerprints[iter->first]);
}
}
void Datacenter::saveCdnConfig() {
if (cdnConfig == nullptr) {
cdnConfig = new Config("cdnkeys.dat");
}
static NativeByteBuffer *sizeCalculator = new NativeByteBuffer(true);
sizeCalculator->clearCapacity();
saveCdnConfigInternal(sizeCalculator);
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(sizeCalculator->capacity());
saveCdnConfigInternal(buffer);
cdnConfig->writeConfig(buffer);
buffer->reuse();
}
void Datacenter::loadCdnConfig(Datacenter *datacenter) {
if (std::find(cdnWaitingDatacenters.begin(), cdnWaitingDatacenters.end(), datacenter) != cdnWaitingDatacenters.end()) {
return;
}
cdnWaitingDatacenters.push_back(datacenter);
if (loadingCdnKeys) {
return;
}
if (cdnPublicKeysFingerprints.empty()) {
if (cdnConfig == nullptr) {
cdnConfig = new Config("cdnkeys.dat");
}
NativeByteBuffer *buffer = cdnConfig->readConfig();
if (buffer != nullptr) {
uint32_t version = buffer->readUint32(nullptr);
if (version >= 1) {
size_t count = buffer->readUint32(nullptr);
for (uint32_t a = 0; a < count; a++) {
int dcId = buffer->readInt32(nullptr);
cdnPublicKeys[dcId] = buffer->readString(nullptr);
cdnPublicKeysFingerprints[dcId] = buffer->readUint64(nullptr);
}
}
buffer->reuse();
if (!cdnPublicKeysFingerprints.empty()) {
size_t count = cdnWaitingDatacenters.size();
for (uint32_t a = 0; a < count; a++) {
cdnWaitingDatacenters[a]->beginHandshake(false);
}
cdnWaitingDatacenters.clear();
return;
}
}
}
loadingCdnKeys = true;
TL_help_getCdnConfig *request = new TL_help_getCdnConfig();
ConnectionsManager::getInstance().sendRequest(request, [&](TLObject *response, TL_error *error, int32_t networkType) {
if (response != nullptr) {
TL_cdnConfig *config = (TL_cdnConfig *) response;
size_t count = config->public_keys.size();
BIO *keyBio = BIO_new(BIO_s_mem());
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(1024);
static uint8_t sha1Buffer[20];
for (uint32_t a = 0; a < count; a++) {
TL_cdnPublicKey *publicKey = config->public_keys[a].get();
cdnPublicKeys[publicKey->dc_id] = publicKey->public_key;
BIO_write(keyBio, publicKey->public_key.c_str(), (int) publicKey->public_key.length());
RSA *rsaKey = PEM_read_bio_RSAPublicKey(keyBio, NULL, NULL, NULL);
int nBytes = BN_num_bytes(rsaKey->n);
int eBytes = BN_num_bytes(rsaKey->e);
std::string nStr(nBytes, 0), eStr(eBytes, 0);
BN_bn2bin(rsaKey->n, (uint8_t *)&nStr[0]);
BN_bn2bin(rsaKey->e, (uint8_t *)&eStr[0]);
buffer->writeString(nStr);
buffer->writeString(eStr);
SHA1(buffer->bytes(), buffer->position(), sha1Buffer);
cdnPublicKeysFingerprints[publicKey->dc_id] = ((uint64_t) sha1Buffer[19]) << 56 |
((uint64_t) sha1Buffer[18]) << 48 |
((uint64_t) sha1Buffer[17]) << 40 |
((uint64_t) sha1Buffer[16]) << 32 |
((uint64_t) sha1Buffer[15]) << 24 |
((uint64_t) sha1Buffer[14]) << 16 |
((uint64_t) sha1Buffer[13]) << 8 |
((uint64_t) sha1Buffer[12]);
RSA_free(rsaKey);
if (a != count - 1) {
buffer->position(0);
BIO_reset(keyBio);
}
}
buffer->reuse();
BIO_free(keyBio);
count = cdnWaitingDatacenters.size();
for (uint32_t a = 0; a < count; a++) {
cdnWaitingDatacenters[a]->beginHandshake(false);
}
cdnWaitingDatacenters.clear();
saveCdnConfig();
}
loadingCdnKeys = false;
}, nullptr, RequestFlagEnableUnauthorized | RequestFlagWithoutLogin, DEFAULT_DATACENTER_ID, ConnectionTypeGeneric, true);
}
TL_help_configSimple *Datacenter::decodeSimpleConfig(NativeByteBuffer *buffer) {
TL_help_configSimple *result = nullptr;
static std::string public_key =
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIIBCgKCAQEAyr+18Rex2ohtVy8sroGPBwXD3DOoKCSpjDqYoXgCqB7ioln4eDCF\n"
"fOBUlfXUEvM/fnKCpF46VkAftlb4VuPDeQSS/ZxZYEGqHaywlroVnXHIjgqoxiAd\n"
"192xRGreuXIaUKmkwlM9JID9WS2jUsTpzQ91L8MEPLJ/4zrBwZua8W5fECwCCh2c\n"
"9G5IzzBm+otMS/YKwmR1olzRCyEkyAEjXWqBI9Ftv5eG8m0VkBzOG655WIYdyV0H\n"
"fDK/NWcvGqa0w/nriMD6mDjKOryamw0OP9QuYgMN0C9xMW9y8SmP4h92OAWodTYg\n"
"Y1hZCxdv6cs5UnW9+PWvS+WIbkh+GaWYxwIDAQAB\n"
"-----END RSA PUBLIC KEY-----";
BIO *keyBio = BIO_new(BIO_s_mem());
BIO_write(keyBio, public_key.c_str(), (int) public_key.length());
RSA *rsaKey = PEM_read_bio_RSAPublicKey(keyBio, NULL, NULL, NULL);
if (rsaKey == nullptr) {
if (rsaKey == nullptr) {
DEBUG_E("Invalid rsa public key");
return nullptr;
}
}
BIGNUM x, y;
uint8_t *bytes = buffer->bytes();
if (bnContext == nullptr) {
bnContext = BN_CTX_new();
}
BN_init(&x);
BN_init(&y);
BN_bin2bn(bytes, 256, &x);
if (BN_mod_exp(&y, &x, rsaKey->e, rsaKey->n, bnContext) == 1) {
uint8_t temp[256];
/*BN_bn2bin(&y, temp);
std::string res = "";
for (int a = 0; a < 256; a++) {
char buf[20];
sprintf(buf, "%x", temp[a]);
res += buf;
}
DEBUG_D("hex = %s", res.c_str());*/
unsigned l = 256 - BN_num_bytes(&y);
memset(bytes, 0, l);
if (BN_bn2bin(&y, bytes + l) == 256 - l) {
AES_KEY aeskey;
unsigned char iv[16];
memcpy(iv, bytes + 16, 16);
AES_set_decrypt_key(bytes, 256, &aeskey);
AES_cbc_encrypt(bytes + 32, bytes + 32, 256 - 32, &aeskey, iv, AES_DECRYPT);
EVP_MD_CTX ctx;
unsigned char sha256_out[32];
unsigned olen = 0;
EVP_MD_CTX_init(&ctx);
EVP_DigestInit_ex(&ctx, EVP_sha256(), NULL);
EVP_DigestUpdate(&ctx, bytes + 32, 256 - 32 - 16);
EVP_DigestFinal_ex(&ctx, sha256_out, &olen);
EVP_MD_CTX_cleanup(&ctx);
if (olen == 32) {
if (memcmp(bytes + 256 - 16, sha256_out, 16) == 0) {
unsigned data_len = *(unsigned *) (bytes + 32);
if (data_len && data_len <= 256 - 32 - 16 && !(data_len & 3)) {
buffer->position(32 + 4);
bool error = false;
result = TL_help_configSimple::TLdeserialize(buffer, buffer->readUint32(&error), error);
if (error) {
if (result != nullptr) {
delete result;
result = nullptr;
}
}
} else {
DEBUG_E("TL data length field invalid - %d", data_len);
}
} else {
DEBUG_E("RSA signature check FAILED (SHA256 mismatch)");
}
}
}
}
BN_free(&x);
BN_free(&y);
RSA_free(rsaKey);
BIO_free(keyBio);
return result;
}
