CLI: Clear displayed password after 30 seconds (if found)

cli/main.c

@@ -40,6 +40,7 @@
 #define SERVER_PROTOCOL            4
 #define RESPONSE_SIZE           2048
 #define MAX_SUBDOMAINS            10
+#define DISPLAY_TIME              30 // 30 seconds
 
 struct gpass_parameters {
     unsigned      pbkdf2_level;
@@ -71,6 +72,25 @@ static const EVP_MD * s_md_256;
 
 static EVP_CIPHER_CTX * s_cipher_ctx;
 
+static void display_password(char* password, int time)
+{
+    int length;
+
+    for (; time; time--)
+    {
+        printf("\r(%02d) Password found: %s", time, password);
+        fflush(stdout);
+        sleep(1);
+    }
+
+    // Clear line
+    printf("\r");
+    length = 4 + 17 + strlen(password) + 1;
+    while (length--)
+        printf(" ");
+    printf("\n");
+}
+
 static int digest(unsigned char** out, unsigned char* in, unsigned size)
 {
     *out = NULL;
@@ -434,7 +454,7 @@ static int ask_server(struct gpass_parameters* params)
                 memmove(password, &password[3], len-3);
                 password[len-3] = 0;
             }
-            printf("Password found: %s\n", password);
+            display_password((char*)password, DISPLAY_TIME);
             ret = 0;
             goto end;
         }