diff --git a/ServidorTFG.pro b/ServidorTFG.pro
index bab0040..640cd41 100644
--- a/ServidorTFG.pro
+++ b/ServidorTFG.pro
@@ -7,7 +7,6 @@ SOURCES += \
         main.cpp \
     conexion.cpp \
     conexion_ssl.cpp \
-    thread_selector.cpp \
     config_reader.cpp \
     tests.cpp \
     data_acces.cpp \
@@ -19,7 +18,6 @@ SOURCES += \
 HEADERS += \
     conexion.h \
     conexion_ssl.h \
-    thread_selector.h \
     config_reader.h \
     tests.h \
     data_acces.h \
diff --git a/ServidorTFG.pro.user b/ServidorTFG.pro.user
index 40226cc..adb031d 100644
--- a/ServidorTFG.pro.user
+++ b/ServidorTFG.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.8.2, 2020-05-27T13:14:37. -->
+<!-- Written by QtCreator 4.8.2, 2020-05-31T02:21:12. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
diff --git a/conexion.cpp b/conexion.cpp
index 76c03c6..3f70b6d 100644
--- a/conexion.cpp
+++ b/conexion.cpp
@@ -56,7 +56,6 @@ void conexion::start_server(){
       int client = accept(sock, (struct sockaddr*)&addr, &len);
       std::thread t_client(conexion_client , client);
       t_client.detach();
-      //cont++;
   }
   close(sock);
 }
@@ -70,8 +69,13 @@ void conexion_client(int client){
       exit(EXIT_FAILURE);
   }else{
       session_manager* session = new session_manager(client);
-      while(!session->validate_pass());
-      session->start_dialog();
+      bool enter=session->validate_pass();
+      while(!enter){
+          enter=session->validate_pass();
+        }
+      if(enter){
+         session->start_dialog();
+        }
       delete (session);
       close(client);
   }
diff --git a/conexion_ssl.cpp b/conexion_ssl.cpp
index ede114e..b8ff96b 100644
--- a/conexion_ssl.cpp
+++ b/conexion_ssl.cpp
@@ -29,7 +29,6 @@ void conexion_ssl::start_server(){
       perror("bad port in config file");
     }
   sock = this->create_socket(atoi(port.data()));
-  /* Handle connections */
   SSL_CTX *ctx;
 
   init_openssl();
@@ -37,8 +36,6 @@ void conexion_ssl::start_server(){
 
   this->configure_context(ctx);
 
-  //std::thread *hilos=new thread[50];
-  //int cont=0;
   while(1) {
       struct sockaddr_in addr;
       uint len = sizeof(addr);
@@ -46,7 +43,6 @@ void conexion_ssl::start_server(){
       int client = accept(sock, (struct sockaddr*)&addr, &len);
       std::thread t_client(conexion_client,ctx , client);
       t_client.detach();
-      //cont++;
   }
   close(sock);
   SSL_CTX_free(ctx);
@@ -107,8 +103,6 @@ void conexion_ssl::configure_context(SSL_CTX *ctx)
 }
 
 void conexion_client(SSL_CTX *ctx,int client){
-  char     buf [256];
-
   if (client < 0) {
       perror("Unable to accept");
       exit(EXIT_FAILURE);
@@ -122,9 +116,13 @@ void conexion_client(SSL_CTX *ctx,int client){
       }
       else {
           session_manager* session = new session_manager_ssl(ssl);
-          while(!session->validate_pass());
-          session->start_dialog();
-          //SSL_write(ssl,std::to_string(la->execute()).data() , sizeof (int));
+          bool enter=session->validate_pass();
+          while(!enter){
+              enter=session->validate_pass();
+            }
+          if(enter){
+             session->start_dialog();
+            }
           delete (session);
         }
       SSL_shutdown(ssl);
diff --git a/data_acces.cpp b/data_acces.cpp
index a5e8533..04745c2 100644
--- a/data_acces.cpp
+++ b/data_acces.cpp
@@ -1,6 +1,18 @@
 #include "data_acces.h"
+#include <openssl/sha.h>
+#include <openssl/evp.h>
+#include <string.h>
 
 data_acces::data_acces()
 {
 
 }
+
+char* data_acces::get_hash(char *data){
+  unsigned char hash[SHA512_DIGEST_LENGTH];
+  SHA512(reinterpret_cast<unsigned const char*>(data), strlen(data), hash);
+  unsigned char* encodedData= new unsigned char[200];
+  EVP_EncodeBlock(encodedData, hash, sizeof (hash));
+  return reinterpret_cast<char*>(encodedData);
+}
+
diff --git a/data_acces.h b/data_acces.h
index c0525f5..fa59c5f 100644
--- a/data_acces.h
+++ b/data_acces.h
@@ -17,6 +17,6 @@ public:
   virtual bool get_package_exists(std::string package)=0;
   virtual void create_user(std::string user, std::string pass, bool admin)=0;
   virtual void remove_user(std::string user)=0;
+  static char* get_hash(char *data);
 };
-
 #endif // DATA_ACCES_H
diff --git a/main.cpp b/main.cpp
index 7cb40cf..07723a4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -5,11 +5,15 @@
 #include "conexion_ssl.h"
 #include "config_reader.h"
 #include "tests.h"
+#include "msql_acces.h"
 
 #define file_config "config"
 CPPUNIT_TEST_SUITE_REGISTRATION( test_basic );
 int main()
 {
+  //msql_acces data;
+  //data.create_user("otro", "otro", true);
+
   //inicio de los tests
   CPPUNIT_NS::TestResult testresult;
   CPPUNIT_NS::TestResultCollector collectedresults;
diff --git a/msql_acces.cpp b/msql_acces.cpp
index 7559160..2d596d3 100644
--- a/msql_acces.cpp
+++ b/msql_acces.cpp
@@ -20,6 +20,7 @@ std::string msql_acces::get_passwd(std::string username){
   while(res->next())
     ret = res->getString("passwd");
   delete res;
+  delete pstmt;
   return ret;
 }
 
@@ -31,6 +32,7 @@ bool msql_acces::get_admin(std::string username){
   while(res->next())
     ret = res->getBoolean("admin");
   delete res;
+  delete pstmt;
   return ret;
 }
 
@@ -55,6 +57,7 @@ std::list<std::string> msql_acces::get_pinfo(){
       ret.push_back(aux);
     }
   delete res;
+  delete pstmt;
   return ret;
 }
 
@@ -76,6 +79,7 @@ std::list<std::string> msql_acces::get_uinfo(){
       ret.push_back(aux);
     }
   delete res;
+  delete pstmt;
   return ret;
 }
 
@@ -85,6 +89,7 @@ void msql_acces::write_install(std::string package, std::string user){
   pstmt->setString(1,package);
   pstmt->setString(2,user);
   pstmt->executeUpdate();
+  delete pstmt;
 }
 
 void msql_acces::write_remove(std::string package){
@@ -92,6 +97,7 @@ void msql_acces::write_remove(std::string package){
       con->prepareStatement("delete from packages where name=?");
   pstmt->setString(1,package);
   pstmt->executeUpdate();
+  delete pstmt;
 }
 
 bool msql_acces::get_package_exists(std::string package){
@@ -99,22 +105,20 @@ bool msql_acces::get_package_exists(std::string package){
   pstmt->setString(1,package);
   sql::ResultSet *res = pstmt->executeQuery();
   int ret=0;
-  while(res->next())
+  while(res->next()){
     ret = res->getInt(1);
-
+    }
+  delete pstmt;
   return ret>0;
 }
 
 void msql_acces::create_user(std::string user, std::string pass, bool admin){
   sql::PreparedStatement *pstmt = con->prepareStatement("insert into users(username, passwd, admin) values(?, ?, ?)");
-  unsigned char hash[SHA512_DIGEST_LENGTH];
-  SHA512(reinterpret_cast<unsigned const char*>(pass.data()), strlen(pass.data()), hash);
-  unsigned char encodedData[200];
-  EVP_EncodeBlock(encodedData, hash, sizeof (hash));
   pstmt->setString(1,user);
-  pstmt->setString(2,std::string(reinterpret_cast<char*>(encodedData)));
+  pstmt->setString(2,std::string(data_acces::get_hash(&pass[0])));
   pstmt->setBoolean(3,admin);
   pstmt->executeQuery();
+  delete pstmt;
 }
 
 void msql_acces::remove_user(std::string user){
@@ -122,4 +126,5 @@ void msql_acces::remove_user(std::string user){
       con->prepareStatement("delete from users where username=?");
   pstmt->setString(1,user);
   pstmt->executeUpdate();
+  delete pstmt;
 }
diff --git a/session_manager.cpp b/session_manager.cpp
index c870743..422cf7b 100644
--- a/session_manager.cpp
+++ b/session_manager.cpp
@@ -19,12 +19,8 @@ bool session_manager::validate_pass(){
   this->read_data(buffer, 256);
   std::string user=buffer;
   this->read_data(buffer, 256);
-  // std::string pass=buffer;
-  unsigned char hash[SHA512_DIGEST_LENGTH];
-  SHA512(reinterpret_cast<unsigned const char*>(buffer), strlen(buffer), hash);
-  unsigned char encodedData[200];
-  EVP_EncodeBlock(encodedData, hash, sizeof (hash));
-  std::string pass=std::string(reinterpret_cast<char*>(encodedData));
+  std::string pass=std::string(data_acces::get_hash(buffer));
+  delete[] (buffer);
   if(this->data->get_passwd(user)==pass){
       this->write_data("pass");
       if(this->data->get_admin(user)){
@@ -62,6 +58,7 @@ void session_manager::start_dialog(){
           break;
         }
   }
+  delete[] (buffer);
 }
 
 int session_manager::execute(){
@@ -75,11 +72,13 @@ int session_manager::execute(){
      this->read_data(use_conf,256);
      conf.change_uses(use_conf);
     }else if(strcmp(use_conf,"n")!=0){
+      delete[] (n_package);
       perror("fail in protocol comunication");
       return -1;
     }
   delete [] (use_conf);
   std::string result = this->appli_command("--ask", n_package);
+  delete[] (n_package);
   if(result=="err"){
       return -1;
     }else{
@@ -94,6 +93,7 @@ int session_manager::remove(){
   char* n_package = new char[256];
   this->read_data(n_package, 256);
   std::string result = this->appli_command("--unmerge",n_package);
+  delete[] (n_package);
   if(result=="err"){
       return -1;
     }else{
@@ -121,10 +121,8 @@ std::string session_manager::appli_command(char comand[], char* n_package){
     if(status>0){
         this->write_data("ok");
         ret = n_package;
-        delete[] (n_package);
       }else{
         this->write_data("bad");
-        delete[] (n_package);
         ret = "err";
       }
   }
@@ -167,6 +165,7 @@ void session_manager::remove_user(){
   this->read_data(buffer,256);
   this->read_data(buffer,256);
   this->data->remove_user(std::string(buffer));
+  delete[] (buffer);
 }
 
 int session_manager::read_data(char* input, int size){
diff --git a/tests.cpp b/tests.cpp
index 861c506..69e522c 100644
--- a/tests.cpp
+++ b/tests.cpp
@@ -1,10 +1,15 @@
 #include "tests.h"
+#include "msql_acces.h"
+#include <openssl/evp.h>
+#include <openssl/sha.h>
+#include <string.h>
 
 void test_basic::setUp(){
   this->conf=new config_reader("config");
+  this->data=new msql_acces();
 }
 
-void test_basic::testInitial(){
+void test_basic::test_initial(){
   std::string res;
   CPPUNIT_ASSERT(true==this->conf->get_param("port",res));
   CPPUNIT_ASSERT("4433"==res);
@@ -20,3 +25,23 @@ void test_basic::pass_tests(){
   testrunner.addTest (CPPUNIT_NS::TestFactoryRegistry::getRegistry().makeTest ());
   testrunner.run(testresult);
 }
+
+void test_basic::hash_test(){
+  CPPUNIT_ASSERT(strcmp(data_acces::get_hash("test1")
+                        ,data_acces::get_hash("test1"))==0);
+  CPPUNIT_ASSERT(strcmp(data_acces::get_hash("test1")
+                        ,data_acces::get_hash("test2"))!=0);
+}
+
+void test_basic::msql_loggin_test(){
+  std::string pass = this->data->get_passwd("test");
+  CPPUNIT_ASSERT(pass==std::string(data_acces::get_hash("ok")));
+  CPPUNIT_ASSERT(pass!=std::string(data_acces::get_hash("fail")));
+}
+
+void test_basic::msql_package_test(){
+  data->write_install("p1","test");
+  CPPUNIT_ASSERT(data->get_package_exists("p1"));
+  data->write_remove("p1");
+  CPPUNIT_ASSERT(!data->get_package_exists("p1"));
+}
diff --git a/tests.h b/tests.h
index 0e6397b..b96c911 100644
--- a/tests.h
+++ b/tests.h
@@ -12,17 +12,25 @@
 #include <cppunit/CompilerOutputter.h>
 #include <cppunit/XmlOutputter.h>
 #include "config_reader.h"
+#include "data_acces.h"
 using namespace CppUnit;
 
 class test_basic : public CppUnit::TestFixture{
   CPPUNIT_TEST_SUITE(test_basic);
-  CPPUNIT_TEST(testInitial);
+  CPPUNIT_TEST(test_initial);
+  CPPUNIT_TEST(hash_test);
+  CPPUNIT_TEST(msql_loggin_test);
+  CPPUNIT_TEST(msql_package_test);
   CPPUNIT_TEST_SUITE_END();
 public:
   void setUp(void);
   void pass_tests();
 private:
-  void testInitial(void);
+  void test_initial();
+  void hash_test();
+  void msql_loggin_test();
+  void msql_package_test();
   config_reader *conf;
+  data_acces *data;
 };
 #endif // TESTS_H