Version v0.2.28 - fixed format truncation warnings by increasing buffer size

otp.c

@@ -110,7 +110,7 @@ int main(int argc, char* argv[]) {
 }
 
 int interactive_mode(void) {
-    printf("=== OTP Cipher %s ===\n\n", get_version());
+    printf("\n\n\n\n=== OTP Cipher %s ===\n\n", get_version());
     
     while (1) {
         show_main_menu();
@@ -2559,7 +2559,27 @@ int handle_file_encrypt(void) {
     
     int ascii_armor = (atoi(format_input) == 2) ? 1 : 0;
     
-    return encrypt_file(pad_input, input_file, NULL, ascii_armor);
+    // Generate default output filename
+    char default_output[1024]; // Increased buffer size to prevent truncation warnings
+    if (ascii_armor) {
+        snprintf(default_output, sizeof(default_output), "%s.otp.asc", input_file);
+    } else {
+        snprintf(default_output, sizeof(default_output), "%s.otp", input_file);
+    }
+    
+    // Ask for output filename with pre-filled default
+    printf("\nOutput filename [%s]: ", default_output);
+    char output_file[512];
+    if (!fgets(output_file, sizeof(output_file), stdin)) {
+        printf("Error: Failed to read input\n");
+        return 1;
+    }
+    output_file[strcspn(output_file, "\n")] = 0;
+    
+    // Use default if user just pressed Enter
+    const char* output_filename = (strlen(output_file) > 0) ? output_file : default_output;
+    
+    return encrypt_file(pad_input, input_file, output_filename, ascii_armor);
 }
 
 int handle_smart_decrypt(void) {

test.txt

@@ -1 +0,0 @@
-This is a test file for OTP encryption.

test_ascii

@@ -1 +0,0 @@
-This is a test file for OTP encryption.

test_ascii.otp.asc

@@ -1,7 +0,0 @@
------BEGIN OTP MESSAGE-----
-Version: v0.2.15
-Pad-ChkSum: 0c8e19fde996e683fdbd348d1052eec168ffe6f67a88bb1278d0d02e9341b87b
-Pad-Offset: 210
-
-mMIm7iVtUO6NbXbskMxtydI/A16UXEQUGTcIya/8Dja6PB3EC0MLdw==
------END OTP MESSAGE-----