first commit, base client with gtk3

conexion_ssl.cpp

@@ -0,0 +1,39 @@
+#include "conexion_ssl.h"
+#include <openssl/crypto.h>
+#include <openssl/x509.h>
+#include <openssl/pem.h>
+#include <openssl/err.h>
+
+#define CHK_NULL(x) if ((x)==NULL) exit (1)
+#define CHK_ERR(err,s) if ((err)==-1) { perror(s); exit(1); }
+#define CHK_SSL(err) if ((err)==-1) { ERR_print_errors_fp(stderr); exit(2); }
+
+conexion_ssl::conexion_ssl(config_reader &conf) : conexion(conf)
+{
+  int err;
+  SSL_CTX* ctx;
+  const SSL_METHOD *meth;
+
+  OpenSSL_add_ssl_algorithms();
+  meth = TLS_client_method();
+  SSL_load_error_strings();
+  ctx = SSL_CTX_new (meth);
+  CHK_NULL(ctx);
+
+  this->ssl=SSL_new(ctx);
+  SSL_set_fd(this->ssl,this->fd);
+  err = SSL_connect (ssl);
+  CHK_SSL(err)
+}
+
+ssize_t conexion_ssl::read_string(std::string &entrada, int size){
+  char* buffer = new char[size+1];
+  ssize_t ret = SSL_read (this->ssl, buffer, size);
+  buffer[ret]='\0';
+  entrada = std::string(buffer);
+  return ret;
+}
+
+ssize_t conexion_ssl::write_string(std::string entrada){
+  return SSL_write(this->ssl,entrada.data(),sizeof (entrada.data()));
+}