Version v0.2.36 - fixed build warning and corrected encrypt menu output filename generation logic

decrypted.bin

@@ -0,0 +1 @@
+Hello, this is a test file for encryption!

otp.c

@@ -271,7 +271,7 @@ int command_line_mode(int argc, char* argv[]) {
 }
 
 void show_main_menu(void) {
-    printf("=== Main Menu ===\n\n");
+    printf("======================== Main Menu ========================\n");
     printf("\033[4mT\033[0mext encrypt\n");
     printf("\033[4mF\033[0mile encrypt\n");
     printf("\033[4mD\033[0mecrypt\n");
@@ -461,16 +461,21 @@ int handle_encrypt_menu(void) {
         
         int ascii_armor = (atoi(format_input) == 2) ? 1 : 0;
         
-        // Ask for custom output filename (optional)
+        // Generate default output filename and use enhanced input function
-        printf("\nEnter output filename (or press Enter for default): ");
+        char default_output[1024]; // Increased 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);
+        }
+        
         char output_file[512];
-        if (!fgets(output_file, sizeof(output_file), stdin)) {
+        if (get_filename_with_default("Output filename:", default_output, output_file, sizeof(output_file)) != 0) {
             printf("Error: Failed to read input\n");
             return 1;
         }
-        output_file[strcspn(output_file, "\n")] = 0;
         
-        const char* output_filename = (strlen(output_file) > 0) ? output_file : NULL;
+        const char* output_filename = output_file;
         
         return encrypt_file(pad_input, input_file, output_filename, ascii_armor);
     }
@@ -517,16 +522,32 @@ int handle_decrypt_menu(void) {
             return 1;
         }
         
-        // Ask for custom output filename (optional)
+        // Generate smart default output filename and use enhanced input function
-        printf("\nEnter output filename (or press Enter for default): ");
+        char default_output[512];
+        strncpy(default_output, input_file, sizeof(default_output) - 1);
+        default_output[sizeof(default_output) - 1] = '\0';
+        
+        // Remove common encrypted extensions to get a better default
+        if (strstr(default_output, ".otp.asc")) {
+            // Replace .otp.asc with original extension or no extension
+            char* ext_pos = strstr(default_output, ".otp.asc");
+            *ext_pos = '\0';
+        } else if (strstr(default_output, ".otp")) {
+            // Replace .otp with original extension or no extension  
+            char* ext_pos = strstr(default_output, ".otp");
+            *ext_pos = '\0';
+        } else {
+            // No recognized encrypted extension, add .decrypted suffix
+            strncat(default_output, ".decrypted", sizeof(default_output) - strlen(default_output) - 1);
+        }
+        
         char output_file[512];
-        if (!fgets(output_file, sizeof(output_file), stdin)) {
+        if (get_filename_with_default("Output filename:", default_output, output_file, sizeof(output_file)) != 0) {
             printf("Error: Failed to read input\n");
             return 1;
         }
-        output_file[strcspn(output_file, "\n")] = 0;
         
-        const char* output_filename = (strlen(output_file) > 0) ? output_file : NULL;
+        const char* output_filename = output_file;
         
         return decrypt_file(input_file, output_filename);
     }
@@ -2447,7 +2468,7 @@ int get_filename_with_default(const char* prompt, const char* default_path, char
             }
         } else if (c >= 32 && c <= 126) {
             // Printable character
-            if (buffer_len < sizeof(edit_buffer) - 1) {
+            if (buffer_len < (int)sizeof(edit_buffer) - 1) {
                 // Move everything after cursor one position right
                 memmove(&edit_buffer[cursor_pos + 1], &edit_buffer[cursor_pos], buffer_len - cursor_pos + 1);
                 edit_buffer[cursor_pos] = c;

test_decrypt.txt

@@ -0,0 +1 @@
+Test file content for decryption

test_file.txt.otp.asc

@@ -0,0 +1,7 @@
+-----BEGIN OTP MESSAGE-----
+Version: v0.2.29
+Pad-ChkSum: d0d4a489354348b08d8c7b324814d8c50010042e9da47f2c973f32a16a09101b
+Pad-Offset: 57
+
+05S8GfS0tFfczNMUz0xrieFGoPSREM4uo5QhFGoBCcOzjfTXTDMt3hRtAQ==
+-----END OTP MESSAGE-----

test_input.txt

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