// MojangAPI.cpp
// Implements the cMojangAPI class representing the various API points provided by Mojang's webservices, and a cache for their results
#include "Globals.h"
#include "MojangAPI.h"
#include "SQLiteCpp/Database.h"
#include "SQLiteCpp/Statement.h"
#include "inifile/iniFile.h"
#include "json/json.h"
#include "PolarSSL++/BlockingSslClientSocket.h"
/** The maximum age for items to be kept in the cache. Any item older than this will be removed. */
const Int64 MAX_AGE = 7 * 24 * 60 * 60; // 7 days ago
/** The maximum number of names to send in a single query */
const int MAX_PER_QUERY = 100;
#define DEFAULT_NAME_TO_UUID_SERVER "api.mojang.com"
#define DEFAULT_NAME_TO_UUID_ADDRESS "/profiles/minecraft"
/** This is the data of the root certs for Starfield Technologies, the CA that signed sessionserver.mojang.com's cert:
Downloaded from http://certs.starfieldtech.com/repository/ */
static const AString & StarfieldCACert(void)
{
static const AString Cert(
// G2 cert
"-----BEGIN CERTIFICATE-----\n"
"MIID3TCCAsWgAwIBAgIBADANBgkqhkiG9w0BAQsFADCBjzELMAkGA1UEBhMCVVMx\n"
"EDAOBgNVBAgTB0FyaXpvbmExEzARBgNVBAcTClNjb3R0c2RhbGUxJTAjBgNVBAoT\n"
"HFN0YXJmaWVsZCBUZWNobm9sb2dpZXMsIEluYy4xMjAwBgNVBAMTKVN0YXJmaWVs\n"
"ZCBSb290IENlcnRpZmljYXRlIEF1dGhvcml0eSAtIEcyMB4XDTA5MDkwMTAwMDAw\n"
"MFoXDTM3MTIzMTIzNTk1OVowgY8xCzAJBgNVBAYTAlVTMRAwDgYDVQQIEwdBcml6\n"
"b25hMRMwEQYDVQQHEwpTY290dHNkYWxlMSUwIwYDVQQKExxTdGFyZmllbGQgVGVj\n"
"aG5vbG9naWVzLCBJbmMuMTIwMAYDVQQDEylTdGFyZmllbGQgUm9vdCBDZXJ0aWZp\n"
"Y2F0ZSBBdXRob3JpdHkgLSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC\n"
"ggEBAL3twQP89o/8ArFvW59I2Z154qK3A2FWGMNHttfKPTUuiUP3oWmb3ooa/RMg\n"
"nLRJdzIpVv257IzdIvpy3Cdhl+72WoTsbhm5iSzchFvVdPtrX8WJpRBSiUZV9Lh1\n"
"HOZ/5FSuS/hVclcCGfgXcVnrHigHdMWdSL5stPSksPNkN3mSwOxGXn/hbVNMYq/N\n"
"Hwtjuzqd+/x5AJhhdM8mgkBj87JyahkNmcrUDnXMN/uLicFZ8WJ/X7NfZTD4p7dN\n"
"dloedl40wOiWVpmKs/B/pM293DIxfJHP4F8R+GuqSVzRmZTRouNjWwl2tVZi4Ut0\n"
"HZbUJtQIBFnQmA4O5t78w+wfkPECAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAO\n"
"BgNVHQ8BAf8EBAMCAQYwHQYDVR0OBBYEFHwMMh+n2TB/xH1oo2Kooc6rB1snMA0G\n"
"CSqGSIb3DQEBCwUAA4IBAQARWfolTwNvlJk7mh+ChTnUdgWUXuEok21iXQnCoKjU\n"
"sHU48TRqneSfioYmUeYs0cYtbpUgSpIB7LiKZ3sx4mcujJUDJi5DnUox9g61DLu3\n"
"4jd/IroAow57UvtruzvE03lRTs2Q9GcHGcg8RnoNAX3FWOdt5oUwF5okxBDgBPfg\n"
"8n/Uqgr/Qh037ZTlZFkSIHc40zI+OIF1lnP6aI+xy84fxez6nH7PfrHxBy22/L/K\n"
"pL/QlwVKvOoYKAKQvVR4CSFx09F9HdkWsKlhPdAKACL8x3vLCWRFCztAgfd9fDL1\n"
"mMpYjn0q7pBZc2T5NnReJaH1ZgUufzkVqSr7UIuOhWn0\n"
"-----END CERTIFICATE-----\n\n"
// Original (G1) cert:
"-----BEGIN CERTIFICATE-----\n"
"MIIEDzCCAvegAwIBAgIBADANBgkqhkiG9w0BAQUFADBoMQswCQYDVQQGEwJVUzEl\n"
"MCMGA1UEChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMp\n"
"U3RhcmZpZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMDQw\n"
"NjI5MTczOTE2WhcNMzQwNjI5MTczOTE2WjBoMQswCQYDVQQGEwJVUzElMCMGA1UE\n"
"ChMcU3RhcmZpZWxkIFRlY2hub2xvZ2llcywgSW5jLjEyMDAGA1UECxMpU3RhcmZp\n"
"ZWxkIENsYXNzIDIgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggEgMA0GCSqGSIb3\n"
"DQEBAQUAA4IBDQAwggEIAoIBAQC3Msj+6XGmBIWtDBFk385N78gDGIc/oav7PKaf\n"
"8MOh2tTYbitTkPskpD6E8J7oX+zlJ0T1KKY/e97gKvDIr1MvnsoFAZMej2YcOadN\n"
"+lq2cwQlZut3f+dZxkqZJRRU6ybH838Z1TBwj6+wRir/resp7defqgSHo9T5iaU0\n"
"X9tDkYI22WY8sbi5gv2cOj4QyDvvBmVmepsZGD3/cVE8MC5fvj13c7JdBmzDI1aa\n"
"K4UmkhynArPkPw2vCHmCuDY96pzTNbO8acr1zJ3o/WSNF4Azbl5KXZnJHoe0nRrA\n"
"1W4TNSNe35tfPe/W93bC6j67eA0cQmdrBNj41tpvi/JEoAGrAgEDo4HFMIHCMB0G\n"
"A1UdDgQWBBS/X7fRzt0fhvRbVazc1xDCDqmI5zCBkgYDVR0jBIGKMIGHgBS/X7fR\n"
"zt0fhvRbVazc1xDCDqmI56FspGowaDELMAkGA1UEBhMCVVMxJTAjBgNVBAoTHFN0\n"
"YXJmaWVsZCBUZWNobm9sb2dpZXMsIEluYy4xMjAwBgNVBAsTKVN0YXJmaWVsZCBD\n"
"bGFzcyAyIENlcnRpZmljYXRpb24gQXV0aG9yaXR5ggEAMAwGA1UdEwQFMAMBAf8w\n"
"DQYJKoZIhvcNAQEFBQADggEBAAWdP4id0ckaVaGsafPzWdqbAYcaT1epoXkJKtv3\n"
"L7IezMdeatiDh6GX70k1PncGQVhiv45YuApnP+yz3SFmH8lU+nLMPUxA2IGvd56D\n"
"eruix/U0F47ZEUD0/CwqTRV/p2JdLiXTAAsgGh1o+Re49L2L7ShZ3U0WixeDyLJl\n"
"xy16paq8U4Zt3VekyvggQQto8PT7dL5WXXp59fkdheMtlb71cZBDzI0fmgAKhynp\n"
"VSJYACPq4xJDKVtHCN2MQWplBqjlIapBtJUhlbl90TSrE9atvNziPTnNvT51cKEY\n"
"WQPJIrSPnNVeKtelttQKbfi3QBFGmh95DmK/D5fs4C8fF5Q=\n"
"-----END CERTIFICATE-----\n"
);
return Cert;
}
////////////////////////////////////////////////////////////////////////////////
// cMojangAPI:
cMojangAPI::cMojangAPI(void) :
m_NameToUUIDServer(DEFAULT_NAME_TO_UUID_SERVER),
m_NameToUUIDAddress(DEFAULT_NAME_TO_UUID_ADDRESS)
{
}
cMojangAPI::~cMojangAPI()
{
SaveCachesToDisk();
}
void cMojangAPI::Start(cIniFile & a_SettingsIni)
{
m_NameToUUIDServer = a_SettingsIni.GetValueSet("MojangAPI", "NameToUUIDServer", DEFAULT_NAME_TO_UUID_SERVER);
m_NameToUUIDAddress = a_SettingsIni.GetValueSet("MojangAPI", "NameToUUIDAddress", DEFAULT_NAME_TO_UUID_ADDRESS);
LoadCachesFromDisk();
}
AString cMojangAPI::GetUUIDFromPlayerName(const AString & a_PlayerName, bool a_UseOnlyCached)
{
// Convert the playername to lowercase:
AString lcPlayerName(a_PlayerName);
StrToLower(lcPlayerName);
// Request the cache to populate any names not yet contained:
if (!a_UseOnlyCached)
{
AStringVector PlayerNames;
PlayerNames.push_back(lcPlayerName);
CacheNamesToUUIDs(PlayerNames);
}
// Retrieve from cache:
cNameToUUIDMap::const_iterator itr = m_NameToUUID.find(lcPlayerName);
if (itr == m_NameToUUID.end())
{
// No UUID found
return "";
}
return itr->second.m_PlayerName;
}
AStringVector cMojangAPI::GetUUIDsFromPlayerNames(const AStringVector & a_PlayerNames, bool a_UseOnlyCached)
{
// Convert all playernames to lowercase:
AStringVector PlayerNames;
for (AStringVector::const_iterator itr = a_PlayerNames.begin(), end = a_PlayerNames.end(); itr != end; ++itr)
{
AString Lower(*itr);
PlayerNames.push_back(StrToLower(Lower));
} // for itr - a_PlayerNames[]
// Request the cache to populate any names not yet contained:
if (!a_UseOnlyCached)
{
CacheNamesToUUIDs(PlayerNames);
}
// Retrieve from cache:
size_t idx = 0;
AStringVector res;
res.resize(PlayerNames.size());
cCSLock Lock(m_CSNameToUUID);
for (AStringVector::const_iterator itr = PlayerNames.begin(), end = PlayerNames.end(); itr != end; ++itr, ++idx)
{
cNameToUUIDMap::const_iterator itrN = m_NameToUUID.find(*itr);
if (itrN != m_NameToUUID.end())
{
res[idx] = itrN->second.m_UUID;
}
} // for itr - PlayerNames[]
return res;
}
void cMojangAPI::AddPlayerNameToUUIDMapping(const AString & a_PlayerName, const AString & a_UUID)
{
AString lcName(a_PlayerName);
AString UUID = MakeUUIDShort(a_UUID);
Int64 Now = time(NULL);
cCSLock Lock(m_CSNameToUUID);
m_NameToUUID[StrToLower(lcName)] = sUUIDRecord(a_PlayerName, UUID, Now);
}
bool cMojangAPI::SecureRequest(const AString & a_ServerName, const AString & a_Request, AString & a_Response)
{
// Connect the socket:
cBlockingSslClientSocket Socket;
Socket.SetTrustedRootCertsFromString(StarfieldCACert(), a_ServerName);
if (!Socket.Connect(a_ServerName, 443))
{
LOGWARNING("%s: Can't connect to %s: %s", __FUNCTION__, a_ServerName.c_str(), Socket.GetLastErrorText().c_str());
return false;
}
if (!Socket.Send(a_Request.c_str(), a_Request.size()))
{
LOGWARNING("%s: Writing SSL data failed: %s", __FUNCTION__, Socket.GetLastErrorText().c_str());
return false;
}
// Read the HTTP response:
int ret;
unsigned char buf[1024];
for (;;)
{
ret = Socket.Receive(buf, sizeof(buf));
if ((ret == POLARSSL_ERR_NET_WANT_READ) || (ret == POLARSSL_ERR_NET_WANT_WRITE))
{
// This value should never be returned, it is handled internally by cBlockingSslClientSocket
LOGWARNING("%s: SSL reading failed internally", __FUNCTION__);
return false;
}
if (ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
{
break;
}
if (ret < 0)
{
LOGWARNING("%s: SSL reading failed: -0x%x", __FUNCTION__, -ret);
return false;
}
if (ret == 0)
{
break;
}
a_Response.append((const char *)buf, (size_t)ret);
}
Socket.Disconnect();
return true;
}
AString cMojangAPI::MakeUUIDShort(const AString & a_UUID)
{
// Note: we only check the string's length, not the actual content
switch (a_UUID.size())
{
case 32:
{
// Already is a short UUID
return a_UUID;
}
case 36:
{
// Remove the dashes from the string:
AString res;
res.reserve(32);
res.append(a_UUID, 0, 8);
res.append(a_UUID, 9, 4);
res.append(a_UUID, 14, 4);
res.append(a_UUID, 19, 4);
res.append(a_UUID, 24, 12);
return res;
}
}
LOGWARNING("%s: Not an UUID: \"%s\".", __FUNCTION__, a_UUID.c_str());
return "";
}
AString cMojangAPI::MakeUUIDDashed(const AString & a_UUID)
{
// Note: we only check the string's length, not the actual content
switch (a_UUID.size())
{
case 36:
{
// Already is a dashed UUID
return a_UUID;
}
case 32:
{
// Insert dashes at the proper positions:
AString res;
res.reserve(36);
res.append(a_UUID, 0, 8);
res.push_back('-');
res.append(a_UUID, 8, 4);
res.push_back('-');
res.append(a_UUID, 12, 4);
res.push_back('-');
res.append(a_UUID, 16, 4);
res.push_back('-');
res.append(a_UUID, 20, 12);
return res;
}
}
LOGWARNING("%s: Not an UUID: \"%s\".", __FUNCTION__, a_UUID.c_str());
return "";
}
void cMojangAPI::LoadCachesFromDisk(void)
{
try
{
// Open up the SQLite DB:
SQLite::Database db("MojangAPI.sqlite", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
db.exec("CREATE TABLE IF NOT EXISTS PlayerNameToUUID (PlayerName, UUID, DateTime)");
// Clean up old entries:
{
SQLite::Statement stmt(db, "DELETE FROM PlayerNameToUUID WHERE DateTime < ?");
Int64 LimitDateTime = time(NULL) - MAX_AGE;
stmt.bind(1, LimitDateTime);
stmt.exec();
}
// Retrieve all remaining entries::
SQLite::Statement stmt(db, "SELECT PlayerName, UUID, DateTime FROM PlayerNameToUUID");
while (stmt.executeStep())
{
AString PlayerName = stmt.getColumn(0);
AString UUID = stmt.getColumn(1);
Int64 DateTime = stmt.getColumn(2);
AString lcPlayerName = PlayerName;
m_NameToUUID[StrToLower(lcPlayerName)] = sUUIDRecord(PlayerName, UUID, DateTime);
}
}
catch (const SQLite::Exception & ex)
{
LOGINFO("Loading MojangAPI cache failed: %s", ex.what());
}
}
void cMojangAPI::SaveCachesToDisk(void)
{
try
{
// Open up the SQLite DB:
SQLite::Database db("MojangAPI.sqlite", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
db.exec("CREATE TABLE IF NOT EXISTS PlayerNameToUUID (PlayerName, UUID, DateTime)");
// Remove all entries:
db.exec("DELETE FROM PlayerNameToUUID");
// Save all cache entries:
SQLite::Statement stmt(db, "INSERT INTO PlayerNameToUUID(PlayerName, UUID, DateTime) VALUES (?, ?, ?)");
Int64 LimitDateTime = time(NULL) - MAX_AGE;
cCSLock Lock(m_CSNameToUUID);
for (cNameToUUIDMap::const_iterator itr = m_NameToUUID.begin(), end = m_NameToUUID.end(); itr != end; ++itr)
{
if (itr->second.m_DateTime < LimitDateTime)
{
// This item is too old, do not save
continue;
}
stmt.bind(1, itr->second.m_PlayerName);
stmt.bind(2, itr->second.m_UUID);
stmt.bind(3, itr->second.m_DateTime);
stmt.exec();
stmt.reset();
}
}
catch (const SQLite::Exception & ex)
{
LOGINFO("Saving MojangAPI cache failed: %s", ex.what());
}
}
void cMojangAPI::CacheNamesToUUIDs(const AStringVector & a_PlayerNames)
{
// Create a list of names to query, by removing those that are already cached:
AStringVector NamesToQuery;
NamesToQuery.reserve(a_PlayerNames.size());
{
cCSLock Lock(m_CSNameToUUID);
for (AStringVector::const_iterator itr = a_PlayerNames.begin(), end = a_PlayerNames.end(); itr != end; ++itr)
{
if (m_NameToUUID.find(*itr) == m_NameToUUID.end())
{
NamesToQuery.push_back(*itr);
}
} // for itr - a_PlayerNames[]
} // Lock(m_CSNameToUUID)
while (!NamesToQuery.empty())
{
// Create the request body - a JSON containing up to MAX_PER_QUERY playernames:
Json::Value root;
int Count = 0;
AStringVector::iterator itr = NamesToQuery.begin(), end = NamesToQuery.end();
for (; (itr != end) && (Count < MAX_PER_QUERY); ++itr, ++Count)
{
Json::Value req(*itr);
root.append(req);
} // for itr - a_PlayerNames[]
NamesToQuery.erase(NamesToQuery.begin(), itr);
Json::FastWriter Writer;
AString RequestBody = Writer.write(root);
// Create the HTTP request:
AString Request;
Request += "POST " + m_NameToUUIDAddress + " HTTP/1.0\r\n"; // We need to use HTTP 1.0 because we don't handle Chunked transfer encoding
Request += "Host: " + m_NameToUUIDServer + "\r\n";
Request += "User-Agent: MCServer\r\n";
Request += "Connection: close\r\n";
Request += "Content-Type: application/json\r\n";
Request += Printf("Content-Length: %u\r\n", (unsigned)RequestBody.length());
Request += "\r\n";
Request += RequestBody;
// Get the response from the server:
AString Response;
if (!SecureRequest(m_NameToUUIDServer, Request, Response))
{
continue;
}
// Check the HTTP status line:
const AString Prefix("HTTP/1.1 200 OK");
AString HexDump;
if (Response.compare(0, Prefix.size(), Prefix))
{
LOGINFO("%s failed: bad HTTP status line received", __FUNCTION__);
LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
continue;
}
// Erase the HTTP headers from the response:
size_t idxHeadersEnd = Response.find("\r\n\r\n");
if (idxHeadersEnd == AString::npos)
{
LOGINFO("%s failed: bad HTTP response header received", __FUNCTION__);
LOGD("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
continue;
}
Response.erase(0, idxHeadersEnd + 4);
// Parse the returned string into Json:
Json::Reader reader;
if (!reader.parse(Response, root, false) || !root.isArray())
{
LOGWARNING("%s failed: Cannot parse received data (NameToUUID) to JSON!", __FUNCTION__);
LOGD("Response body:\n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
continue;
}
// Store the returned results into cache:
size_t JsonCount = root.size();
Int64 Now = time(NULL);
cCSLock Lock(m_CSNameToUUID);
for (size_t idx = 0; idx < JsonCount; ++idx)
{
Json::Value & Val = root[idx];
AString JsonName = Val.get("name", "").asString();
AString JsonUUID = MakeUUIDShort(Val.get("id", "").asString());
if (JsonUUID.empty())
{
continue;
}
AString lcName = JsonName;
m_NameToUUID[StrToLower(lcName)] = sUUIDRecord(JsonName, JsonUUID, Now);
} // for idx - root[]
} // while (!NamesToQuery.empty())
}
