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-rw-r--r--src/Protocol/Authenticator.cpp347
1 files changed, 347 insertions, 0 deletions
diff --git a/src/Protocol/Authenticator.cpp b/src/Protocol/Authenticator.cpp
new file mode 100644
index 000000000..bbc656eda
--- /dev/null
+++ b/src/Protocol/Authenticator.cpp
@@ -0,0 +1,347 @@
+
+#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "Authenticator.h"
+#include "../OSSupport/BlockingTCPLink.h"
+#include "../Root.h"
+#include "../Server.h"
+#include "../ClientHandle.h"
+
+#include "inifile/iniFile.h"
+#include "json/json.h"
+
+#include "polarssl/config.h"
+#include "polarssl/net.h"
+#include "polarssl/ssl.h"
+#include "polarssl/entropy.h"
+#include "polarssl/ctr_drbg.h"
+#include "polarssl/error.h"
+#include "polarssl/certs.h"
+
+#include <sstream>
+#include <iomanip>
+
+
+
+
+
+#define DEFAULT_AUTH_SERVER "sessionserver.mojang.com"
+#define DEFAULT_AUTH_ADDRESS "/session/minecraft/hasJoined?username=%USERNAME%&serverId=%SERVERID%"
+
+
+
+
+
+cAuthenticator::cAuthenticator(void) :
+ super("cAuthenticator"),
+ m_Server(DEFAULT_AUTH_SERVER),
+ m_Address(DEFAULT_AUTH_ADDRESS),
+ m_ShouldAuthenticate(true)
+{
+}
+
+
+
+
+
+cAuthenticator::~cAuthenticator()
+{
+ Stop();
+}
+
+
+
+
+
+void cAuthenticator::ReadINI(cIniFile & IniFile)
+{
+ m_Server = IniFile.GetValueSet("Authentication", "Server", DEFAULT_AUTH_SERVER);
+ m_Address = IniFile.GetValueSet("Authentication", "Address", DEFAULT_AUTH_ADDRESS);
+ m_ShouldAuthenticate = IniFile.GetValueSetB("Authentication", "Authenticate", true);
+}
+
+
+
+
+
+void cAuthenticator::Authenticate(int a_ClientID, const AString & a_UserName, const AString & a_ServerHash)
+{
+ if (!m_ShouldAuthenticate)
+ {
+ cRoot::Get()->AuthenticateUser(a_ClientID, a_UserName, cClientHandle::GenerateOfflineUUID(a_UserName));
+ return;
+ }
+
+ cCSLock LOCK(m_CS);
+ m_Queue.push_back(cUser(a_ClientID, a_UserName, a_ServerHash));
+ m_QueueNonempty.Set();
+}
+
+
+
+
+
+void cAuthenticator::Start(cIniFile & IniFile)
+{
+ ReadINI(IniFile);
+ m_ShouldTerminate = false;
+ super::Start();
+}
+
+
+
+
+
+void cAuthenticator::Stop(void)
+{
+ m_ShouldTerminate = true;
+ m_QueueNonempty.Set();
+ Wait();
+}
+
+
+
+
+
+void cAuthenticator::Execute(void)
+{
+ for (;;)
+ {
+ cCSLock Lock(m_CS);
+ while (!m_ShouldTerminate && (m_Queue.size() == 0))
+ {
+ cCSUnlock Unlock(Lock);
+ m_QueueNonempty.Wait();
+ }
+ if (m_ShouldTerminate)
+ {
+ return;
+ }
+ ASSERT(!m_Queue.empty());
+
+ cAuthenticator::cUser & User = m_Queue.front();
+ int ClientID = User.m_ClientID;
+ AString UserName = User.m_Name;
+ AString ServerID = User.m_ServerID;
+ m_Queue.pop_front();
+ Lock.Unlock();
+
+ AString NewUserName = UserName;
+ AString UUID;
+ if (AuthWithYggdrasil(NewUserName, ServerID, UUID))
+ {
+ LOGINFO("User %s authenticated with UUID '%s'", NewUserName.c_str(), UUID.c_str());
+ cRoot::Get()->AuthenticateUser(ClientID, NewUserName, UUID);
+ }
+ else
+ {
+ cRoot::Get()->KickUser(ClientID, "Failed to authenticate account!");
+ }
+ } // for (-ever)
+}
+
+
+
+
+
+bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_ServerId, AString & a_UUID)
+{
+ LOGD("Trying to auth user %s", a_UserName.c_str());
+
+ int ret, server_fd = -1;
+ unsigned char buf[1024];
+ const char *pers = "cAuthenticator";
+
+ entropy_context entropy;
+ ctr_drbg_context ctr_drbg;
+ ssl_context ssl;
+ x509_crt cacert;
+
+ /* Initialize the RNG and the session data */
+ memset(&ssl, 0, sizeof(ssl_context));
+ x509_crt_init(&cacert);
+
+ entropy_init(&entropy);
+ if ((ret = ctr_drbg_init(&ctr_drbg, entropy_func, &entropy, (const unsigned char *)pers, strlen(pers))) != 0)
+ {
+ LOGWARNING("cAuthenticator: ctr_drbg_init returned %d", ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ entropy_free(&entropy);
+ return false;
+ }
+
+ /* Initialize certificates */
+ // TODO: Grab the sessionserver's root CA and any intermediates and hard-code them here, instead of test_ca_list
+ ret = x509_crt_parse(&cacert, (const unsigned char *)test_ca_list, strlen(test_ca_list));
+
+ if (ret < 0)
+ {
+ LOGWARNING("cAuthenticator: x509_crt_parse returned -0x%x", -ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ entropy_free(&entropy);
+ return false;
+ }
+
+ /* Connect */
+ if ((ret = net_connect(&server_fd, m_Server.c_str(), 443)) != 0)
+ {
+ LOGWARNING("cAuthenticator: Can't connect to %s: %d", m_Server.c_str(), ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ entropy_free(&entropy);
+ return false;
+ }
+
+ /* Setup */
+ if ((ret = ssl_init(&ssl)) != 0)
+ {
+ LOGWARNING("cAuthenticator: ssl_init returned %d", ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ net_close(server_fd);
+ ssl_free(&ssl);
+ entropy_free(&entropy);
+ memset(&ssl, 0, sizeof(ssl));
+ return false;
+ }
+ ssl_set_endpoint(&ssl, SSL_IS_CLIENT);
+ ssl_set_authmode(&ssl, SSL_VERIFY_OPTIONAL);
+ ssl_set_ca_chain(&ssl, &cacert, NULL, "PolarSSL Server 1");
+ ssl_set_rng(&ssl, ctr_drbg_random, &ctr_drbg);
+ ssl_set_bio(&ssl, net_recv, &server_fd, net_send, &server_fd);
+
+ /* Handshake */
+ while ((ret = ssl_handshake(&ssl)) != 0)
+ {
+ if ((ret != POLARSSL_ERR_NET_WANT_READ) && (ret != POLARSSL_ERR_NET_WANT_WRITE))
+ {
+ LOGWARNING("cAuthenticator: ssl_handshake returned -0x%x", -ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ net_close(server_fd);
+ ssl_free(&ssl);
+ entropy_free(&entropy);
+ memset(&ssl, 0, sizeof(ssl));
+ return false;
+ }
+ }
+
+ /* Write the GET request */
+ AString ActualAddress = m_Address;
+ ReplaceString(ActualAddress, "%USERNAME%", a_UserName);
+ ReplaceString(ActualAddress, "%SERVERID%", a_ServerId);
+
+ AString Request;
+ Request += "GET " + ActualAddress + " HTTP/1.1\r\n";
+ Request += "Host: " + m_Server + "\r\n";
+ Request += "User-Agent: MCServer\r\n";
+ Request += "Connection: close\r\n";
+ Request += "\r\n";
+
+ ret = ssl_write(&ssl, (const unsigned char *)Request.c_str(), Request.size());
+ if (ret <= 0)
+ {
+ LOGWARNING("cAuthenticator: ssl_write returned %d", ret);
+
+ // Free all resources which have been initialized up to this line
+ x509_crt_free(&cacert);
+ net_close(server_fd);
+ ssl_free(&ssl);
+ entropy_free(&entropy);
+ memset(&ssl, 0, sizeof(ssl));
+ return false;
+ }
+
+ /* Read the HTTP response */
+ std::string Response;
+ for (;;)
+ {
+ memset(buf, 0, sizeof(buf));
+ ret = ssl_read(&ssl, buf, sizeof(buf));
+
+ if ((ret == POLARSSL_ERR_NET_WANT_READ) || (ret == POLARSSL_ERR_NET_WANT_WRITE))
+ {
+ continue;
+ }
+ if (ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
+ {
+ break;
+ }
+ if (ret < 0)
+ {
+ LOGWARNING("cAuthenticator: ssl_read returned %d", ret);
+ break;
+ }
+ if (ret == 0)
+ {
+ LOGWARNING("cAuthenticator: EOF");
+ break;
+ }
+
+ Response.append((const char *)buf, ret);
+ }
+
+ ssl_close_notify(&ssl);
+ x509_crt_free(&cacert);
+ net_close(server_fd);
+ ssl_free(&ssl);
+ entropy_free(&entropy);
+ memset(&ssl, 0, sizeof(ssl));
+
+ // Check the HTTP status line:
+ AString prefix("HTTP/1.1 200 OK");
+ AString HexDump;
+ if (Response.compare(0, prefix.size(), prefix))
+ {
+ LOGINFO("User \"%s\" failed to auth, bad http status line received", a_UserName.c_str());
+ LOG("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
+ return false;
+ }
+
+ // Erase the HTTP headers from the response:
+ size_t idxHeadersEnd = Response.find("\r\n\r\n");
+ if (idxHeadersEnd == AString::npos)
+ {
+ LOGINFO("User \"%s\" failed to authenticate, bad http response header received", a_UserName.c_str());
+ LOG("Response: \n%s", CreateHexDump(HexDump, Response.data(), Response.size(), 16).c_str());
+ return false;
+ }
+ Response.erase(0, idxHeadersEnd + 4);
+
+ // Parse the Json response:
+ if (Response.empty())
+ {
+ return false;
+ }
+ Json::Value root;
+ Json::Reader reader;
+ if (!reader.parse(Response, root, false))
+ {
+ LOGWARNING("cAuthenticator: Cannot parse Received Data to json!");
+ return false;
+ }
+ a_UserName = root.get("name", "Unknown").asString();
+ a_UUID = root.get("id", "").asString();
+
+ // If the UUID doesn't contain the hashes, insert them at the proper places:
+ if (a_UUID.size() == 32)
+ {
+ a_UUID.insert(8, "-");
+ a_UUID.insert(13, "-");
+ a_UUID.insert(18, "-");
+ a_UUID.insert(23, "-");
+ }
+ return true;
+}
+
+
+
+
+