added key dir check into why2_chat_generate_keys

src/chat/crypto.c

@@ -19,8 +19,12 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <why2/chat/crypto.h>
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
 #include <sys/random.h>
 
+#include <why2/memory.h>
 #include <why2/misc.h>
 
 #include <gmp.h>
@@ -50,6 +54,17 @@ void generate_prime(mpz_t x)
 //GLOBAL
 void why2_chat_generate_keys(void)
 {
+    //GET PATH TO KEY DIR
+    char *path = why2_replace(WHY2_CHAT_PUB_KEY_LOCATION, "{USER}", getenv("USER"));
+
+    //CHECK IF KEYS EXIST
+    if (access(path, R_OK) != 0)
+    {
+        mkdir(path, 0700);
+
+        //SOME USER OUTPUT
+        printf("You are probably running WHY2-Chat for the first time now.\nGenerating RSA keys...\n");
+
         //VARIABLES
         mpz_t p, q, e, d, n, phi_n, buffer_1, buffer_2;
         mpz_inits(p, q, e, d, n, phi_n, buffer_1, buffer_2, NULL);
@@ -72,6 +87,10 @@ void why2_chat_generate_keys(void)
         //COUNT d
         mpz_invert(d, e, phi_n);
 
-    //DEALLOCATION
+        //KEY DEALLOCATION
         mpz_clears(p, q, e, d, n, phi_n, buffer_1, buffer_2, NULL);
+    }
+
+    //DEALLOCATION
+    why2_deallocate(path);
 }