Added password-protect PEM support.

app.py

@@ -1,34 +1,31 @@
 #!/usr/bin/env python3
 """
-Stegasoo: Stegonography portal, for security-mided messagin demo.
+Stegasoo: Steganography portal for security-minded messaging.
 
     Aaron D. Lee (w/ vibes)
     2025-12-27
 
-    Right Now: It's a stupid bootstrap looking portal that works.
-
-    Future: Socials, Slack, and Matrix server channel watcher function to encode/send/decode
-            messages in real-time from a configurable memes or photos channel.
-
 Built as a learning experience with a few LLMs to see if I can make something decent.
 """
 
 import os
 import io
+import re
 import secrets
 import hashlib
 import struct
 import time
-import threading
 from datetime import datetime
 from flask import Flask, render_template, request, send_file, jsonify, flash, redirect, url_for
 from werkzeug.utils import secure_filename
 from PIL import Image
 from secureDeleter import SecureDeleter
-#from story_generator import generate_all_stories, HAS_ML
 
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.serialization import load_pem_private_key
 
 try:
     from argon2.low_level import hash_secret_raw, Type
@@ -38,6 +35,8 @@ except ImportError:
     from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
     from cryptography.hazmat.primitives import hashes
 
+HAS_ML = False  # Story generator disabled
+
 # ============================================================================
 # FLASK APP CONFIGURATION
 # ============================================================================
@@ -50,6 +49,10 @@ app.config['UPLOAD_FOLDER'] = '/tmp/stego_uploads'
 # Limits
 MAX_IMAGE_PIXELS = 4000000  # 4 megapixels max (e.g., 2000x2000)
 MAX_MESSAGE_SIZE = 50000    # 50KB message max
+MIN_PIN_LENGTH = 6
+MAX_PIN_LENGTH = 9
+MIN_RSA_BITS = 2048
+VALID_RSA_SIZES = [2048, 3072, 4096]
 
 os.makedirs(app.config['UPLOAD_FOLDER'], exist_ok=True)
 
@@ -94,7 +97,6 @@ def secure_cleanup_uploads():
                     deleter = SecureDeleter(filepath)
                     deleter.execute()
                 except Exception as e:
-                    # Fallback to regular delete
                     os.remove(filepath)
 
 
@@ -106,18 +108,139 @@ def cleanup_temp_files():
         TEMP_FILES.pop(fid, None)
 
 # ============================================================================
-# HELPER FUNCTIONS
+# VALIDATION FUNCTIONS
 # ============================================================================
 
 def allowed_file(filename):
     return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
 
+
+def validate_pin(pin):
+    """Validate PIN format: 6-9 digits, no leading zeros."""
+    if not pin:
+        return True, ""  # Empty PIN is valid (if RSA key provided)
+    if not pin.isdigit():
+        return False, "PIN must contain only digits"
+    if len(pin) < MIN_PIN_LENGTH or len(pin) > MAX_PIN_LENGTH:
+        return False, f"PIN must be {MIN_PIN_LENGTH}-{MAX_PIN_LENGTH} digits"
+    if pin[0] == '0':
+        return False, "PIN cannot start with zero"
+    return True, ""
+
+
+def validate_message(message):
+    """Validate message size."""
+    if not message:
+        return False, "Message is required"
+    if len(message) > MAX_MESSAGE_SIZE:
+        return False, f"Message too long. Max {MAX_MESSAGE_SIZE // 1000}KB allowed"
+    return True, ""
+
+
+def validate_image(image_data, name="Image"):
+    """Validate image data and dimensions."""
+    try:
+        img = Image.open(io.BytesIO(image_data))
+        width, height = img.size
+        num_pixels = width * height
+        
+        if num_pixels > MAX_IMAGE_PIXELS:
+            max_dim = int(MAX_IMAGE_PIXELS ** 0.5)
+            return False, f"{name} too large ({width}x{height} = {num_pixels:,} pixels). Max ~{MAX_IMAGE_PIXELS:,} pixels ({max_dim}x{max_dim})"
+        return True, ""
+    except Exception as e:
+        return False, f"Could not read {name}: {str(e)}"
+
+
+def validate_rsa_key(key_data, password=None):
+    """
+    Validate RSA private key.
+    Returns (is_valid, error_message, key_size_bits)
+    """
+    if not key_data:
+        return True, "", 0  # Empty key is valid (if PIN provided)
+    
+    try:
+        # Try to load the key
+        if password:
+            private_key = load_pem_private_key(key_data, password=password.encode(), backend=default_backend())
+        else:
+            # Try without password first
+            try:
+                private_key = load_pem_private_key(key_data, password=None, backend=default_backend())
+            except TypeError:
+                # Key is encrypted but no password provided
+                return False, "RSA key is password-protected. Please enter the password.", 0
+        
+        # Check key size
+        key_size = private_key.key_size
+        if key_size < MIN_RSA_BITS:
+            return False, f"RSA key must be at least {MIN_RSA_BITS} bits (got {key_size})", 0
+        
+        return True, "", key_size
+        
+    except ValueError as e:
+        if "password" in str(e).lower() or "encrypted" in str(e).lower():
+            return False, "Incorrect password for RSA key", 0
+        return False, f"Invalid RSA key format: {str(e)}", 0
+    except Exception as e:
+        return False, f"Could not load RSA key: {str(e)}", 0
+
+
+def validate_security_factors(pin, rsa_key_data):
+    """Ensure at least one security factor is provided."""
+    has_pin = bool(pin and pin.strip())
+    has_key = bool(rsa_key_data and len(rsa_key_data) > 0)
+    
+    if not has_pin and not has_key:
+        return False, "You must provide at least a PIN or RSA Key"
+    return True, ""
+
+
+# ============================================================================
+# RSA KEY GENERATION
+# ============================================================================
+
+def generate_rsa_key(bits=2048):
+    """Generate RSA private key."""
+    if bits not in VALID_RSA_SIZES:
+        bits = 2048
+    
+    private_key = rsa.generate_private_key(
+        public_exponent=65537,
+        key_size=bits,
+        backend=default_backend()
+    )
+    return private_key
+
+
+def export_rsa_key_pem(private_key, password=None):
+    """Export RSA key to PEM format, optionally encrypted."""
+    if password:
+        encryption = serialization.BestAvailableEncryption(password.encode())
+    else:
+        encryption = serialization.NoEncryption()
+    
+    pem = private_key.private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.PKCS8,
+        encryption_algorithm=encryption
+    )
+    return pem
+
+
+# ============================================================================
+# HELPER FUNCTIONS
+# ============================================================================
+
 def generate_pin(length=6):
-    """Generate a random PIN of specified length (6-8 digits)."""
+    """Generate a random PIN of specified length (6-9 digits)."""
+    length = max(MIN_PIN_LENGTH, min(MAX_PIN_LENGTH, length))
     first_digit = str(secrets.randbelow(9) + 1)  # 1-9
-    rest = ''.join(str(secrets.randbelow(10)) for _ in range(length - 1))  # 0-9
+    rest = ''.join(str(secrets.randbelow(10)) for _ in range(length - 1))
     return first_digit + rest
 
+
 def generate_day_phrases(words_per_phrase=3):
     phrases = {}
     for day in DAY_NAMES:
@@ -136,8 +259,8 @@ def hash_photo(image_data):
     return h
 
 
-def derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin=""):
+def derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin="", rsa_key_data=None):
-    """Derive encryption key from photo + phrase + PIN + date + salt."""
+    """Derive encryption key from photo + phrase + PIN + RSA key + date + salt."""
     photo_hash = hash_photo(photo_data)
 
     key_material = (
@@ -148,6 +271,10 @@ def derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin=""):
         salt
     )
     
+    # Add RSA key hash if provided
+    if rsa_key_data:
+        key_material += hashlib.sha256(rsa_key_data).digest()
+
     if HAS_ARGON2:
         key = hash_secret_raw(
             secret=key_material,
@@ -171,20 +298,23 @@ def derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin=""):
     return key
 
 
-def derive_pixel_key(photo_data, day_phrase, date_str, pin=""):
+def derive_pixel_key(photo_data, day_phrase, date_str, pin="", rsa_key_data=None):
     """Derive key for pixel selection."""
     photo_hash = hash_photo(photo_data)
     material = photo_hash + day_phrase.lower().encode() + pin.encode() + date_str.encode()
+    
+    if rsa_key_data:
+        material += hashlib.sha256(rsa_key_data).digest()
+    
     return hashlib.sha256(material + b"pixel_selection").digest()
 
 
-def encrypt_message(message, photo_data, day_phrase, date_str, pin=""):
+def encrypt_message(message, photo_data, day_phrase, date_str, pin="", rsa_key_data=None):
     """Encrypt message using hybrid key derivation."""
     salt = secrets.token_bytes(SALT_SIZE)
-    key = derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin)
+    key = derive_hybrid_key(photo_data, day_phrase, date_str, salt, pin, rsa_key_data)
     iv = secrets.token_bytes(IV_SIZE)
 
-    # Random padding
     if isinstance(message, str):
         message = message.encode()
 
@@ -214,14 +344,8 @@ def encrypt_message(message, photo_data, day_phrase, date_str, pin=""):
 
 
 def generate_pixel_indices(key, num_pixels, num_needed):
-    """
+    """Generate pseudo-random pixel indices."""
-    Generate pseudo-random pixel indices.
-
-    Optimized: Instead of shuffling ALL pixels (slow for large images),
-    we generate indices directly using PRNG and handle collisions.
-    """
     if num_needed >= num_pixels // 2:
-        # If we need many pixels, fall back to shuffle (rare case)
         nonce = b'\x00' * 16
         cipher = Cipher(algorithms.ChaCha20(key, nonce), mode=None, backend=default_backend())
         encryptor = cipher.encryptor()
@@ -236,18 +360,14 @@ def generate_pixel_indices(key, num_pixels, num_needed):
 
         return indices[:num_needed]
 
-    # Optimized path: generate indices directly
-    # Use key to seed selection, ensuring deterministic results
     selected = []
     used = set()
 
-    # Generate random bytes for index selection
     nonce = b'\x00' * 16
     cipher = Cipher(algorithms.ChaCha20(key, nonce), mode=None, backend=default_backend())
     encryptor = cipher.encryptor()
 
-    # Generate more than needed to handle collisions
+    bytes_needed = (num_needed * 2) * 4
-    bytes_needed = (num_needed * 2) * 4  # 4 bytes per index, 2x for collisions
     random_bytes = encryptor.update(b'\x00' * bytes_needed)
 
     byte_offset = 0
@@ -259,7 +379,6 @@ def generate_pixel_indices(key, num_pixels, num_needed):
             used.add(idx)
             selected.append(idx)
 
-    # If we still need more (very unlikely), generate additional
     while len(selected) < num_needed:
         extra_bytes = encryptor.update(b'\x00' * 4)
         idx = int.from_bytes(extra_bytes, 'big') % num_pixels
@@ -343,7 +462,6 @@ def extract_from_image(image_data, pixel_key, bits_per_channel=1):
     num_pixels = len(pixels)
     bits_per_pixel = 3 * bits_per_channel
 
-    # First extract enough to get length
     initial_pixels = (32 + bits_per_pixel - 1) // bits_per_pixel + 10
     initial_indices = generate_pixel_indices(pixel_key, num_pixels, initial_pixels)
 
@@ -407,13 +525,13 @@ def parse_header(encrypted_data):
     return {'date': date_str, 'salt': salt, 'iv': iv, 'tag': tag, 'ciphertext': ciphertext}
 
 
-def decrypt_message(encrypted_data, photo_data, day_phrase, pin=""):
+def decrypt_message(encrypted_data, photo_data, day_phrase, pin="", rsa_key_data=None):
     """Decrypt message."""
     header = parse_header(encrypted_data)
     if not header:
         return None
 
-    key = derive_hybrid_key(photo_data, day_phrase, header['date'], header['salt'], pin)
+    key = derive_hybrid_key(photo_data, day_phrase, header['date'], header['salt'], pin, rsa_key_data)
 
     cipher = Cipher(
         algorithms.AES(key),
@@ -444,28 +562,42 @@ def index():
 def generate():
     if request.method == 'POST':
         words_per_phrase = int(request.form.get('words_per_phrase', 3))
-        pin_length = int(request.form.get('pin_length', 6))
         
-        # Disable generate_stories for now (until much better)
+        # Security factor options
-        #generate_stories = request.form.get('generate_stories') == 'on'
+        use_pin = request.form.get('use_pin') == 'on'
-        generate_stories = request.form.get('generate_stories') == 'off'
+        use_rsa = request.form.get('use_rsa') == 'on'
+        
+        # Validate at least one factor selected
+        if not use_pin and not use_rsa:
+            flash('You must select at least one security factor (PIN or RSA Key)', 'error')
+            return render_template('generate.html', generated=False, has_ml=HAS_ML)
+        
+        pin_length = int(request.form.get('pin_length', 6))
+        rsa_bits = int(request.form.get('rsa_bits', 2048))
         
         # Clamp values to valid ranges
         words_per_phrase = max(3, min(12, words_per_phrase))
-        pin_length = max(6, min(8, pin_length))
+        pin_length = max(MIN_PIN_LENGTH, min(MAX_PIN_LENGTH, pin_length))
+        if rsa_bits not in VALID_RSA_SIZES:
+            rsa_bits = 2048
 
         phrases = generate_day_phrases(words_per_phrase)
-        pin = generate_pin(pin_length)
+        
+        # Generate PIN if selected
+        pin = generate_pin(pin_length) if use_pin else None
+        
+        # Generate RSA key if selected
+        rsa_key_pem = None
+        if use_rsa:
+            private_key = generate_rsa_key(rsa_bits)
+            rsa_key_pem = export_rsa_key_pem(private_key, password=None).decode('utf-8')
 
         # Calculate entropy
-        phrase_entropy = words_per_phrase * 11  # ~11 bits per BIP-39 word
+        phrase_entropy = words_per_phrase * 11
-        pin_entropy = int(pin_length * 3.32)    # log2(10) ≈ 3.32 bits per digit
+        pin_entropy = int(pin_length * 3.32) if use_pin else 0
-        total_entropy = phrase_entropy + pin_entropy
+        # RSA key adds significant entropy (conservatively estimate effective security)
-
+        rsa_entropy = min(rsa_bits // 16, 128) if use_rsa else 0  # ~128 bits effective for 2048-bit
-        # Generate memory aid stories if requested
+        total_entropy = phrase_entropy + pin_entropy + rsa_entropy
-        stories = None
-        if generate_stories:
-            stories = generate_all_stories(phrases, use_ml=HAS_ML)
 
         return render_template('generate.html',
                              phrases=phrases,
@@ -473,15 +605,56 @@ def generate():
                              days=DAY_NAMES,
                              generated=True,
                              words_per_phrase=words_per_phrase,
-                             pin_length=pin_length,
+                             pin_length=pin_length if use_pin else None,
+                             use_pin=use_pin,
+                             use_rsa=use_rsa,
+                             rsa_bits=rsa_bits,
+                             rsa_key_pem=rsa_key_pem,
                              phrase_entropy=phrase_entropy,
                              pin_entropy=pin_entropy,
+                             rsa_entropy=rsa_entropy,
                              total_entropy=total_entropy,
-                             stories=stories,
                              has_ml=HAS_ML)
+    
     return render_template('generate.html', generated=False, has_ml=HAS_ML)
 
 
+@app.route('/generate/download-key', methods=['POST'])
+def download_key():
+    """Download RSA key as password-protected PEM file."""
+    key_pem = request.form.get('key_pem', '')
+    password = request.form.get('key_password', '')
+    
+    if not key_pem:
+        flash('No key to download', 'error')
+        return redirect(url_for('generate'))
+    
+    if not password or len(password) < 8:
+        flash('Password must be at least 8 characters', 'error')
+        return redirect(url_for('generate'))
+    
+    try:
+        # Load the unencrypted key
+        private_key = load_pem_private_key(key_pem.encode(), password=None, backend=default_backend())
+        
+        # Re-export with password protection
+        encrypted_pem = export_rsa_key_pem(private_key, password=password)
+        
+        # Generate filename
+        key_id = secrets.token_hex(4)
+        filename = f'stegasoo_key_{private_key.key_size}_{key_id}.pem'
+        
+        return send_file(
+            io.BytesIO(encrypted_pem),
+            mimetype='application/x-pem-file',
+            as_attachment=True,
+            download_name=filename
+        )
+    except Exception as e:
+        flash(f'Error creating key file: {str(e)}', 'error')
+        return redirect(url_for('generate'))
+
+
 @app.route('/encode', methods=['GET', 'POST'])
 def encode():
     day_of_week = datetime.now().strftime("%A")
@@ -491,6 +664,7 @@ def encode():
             # Get files
             ref_photo = request.files.get('reference_photo')
             carrier = request.files.get('carrier')
+            rsa_key_file = request.files.get('rsa_key')
 
             if not ref_photo or not carrier:
                 flash('Both reference photo and carrier image are required', 'error')
@@ -503,55 +677,72 @@ def encode():
             # Get form data
             message = request.form.get('message', '')
             day_phrase = request.form.get('day_phrase', '')
-            pin = request.form.get('pin', '')
+            pin = request.form.get('pin', '').strip()
+            rsa_password = request.form.get('rsa_password', '')
 
-            if not message or not day_phrase:
+            # Validate message
-                flash('Message and day phrase are required', 'error')
+            valid, error = validate_message(message)
+            if not valid:
+                flash(error, 'error')
                 return render_template('encode.html', day_of_week=day_of_week)
 
-            # Check message size
+            if not day_phrase:
-            if len(message) > MAX_MESSAGE_SIZE:
+                flash('Day phrase is required', 'error')
-                flash(f'Message too long. Max {MAX_MESSAGE_SIZE // 1000}KB allowed.', 'error')
                 return render_template('encode.html', day_of_week=day_of_week)
 
             # Read files
             ref_data = ref_photo.read()
             carrier_data = carrier.read()
+            rsa_key_data = rsa_key_file.read() if rsa_key_file and rsa_key_file.filename else None
 
-            # Validate carrier image dimensions
+            # Validate security factors
-            try:
+            valid, error = validate_security_factors(pin, rsa_key_data)
-                carrier_img = Image.open(io.BytesIO(carrier_data))
+            if not valid:
-                width, height = carrier_img.size
+                flash(error, 'error')
-                num_pixels = width * height
-
-                if num_pixels > MAX_IMAGE_PIXELS:
-                    max_dim = int(MAX_IMAGE_PIXELS ** 0.5)
-                    flash(f'Carrier image too large ({width}x{height} = {num_pixels:,} pixels). '
-                          f'Max ~{MAX_IMAGE_PIXELS:,} pixels ({max_dim}x{max_dim}). '
-                          f'Please resize your image.', 'error')
-                    return render_template('encode.html', day_of_week=day_of_week)
-            except Exception as e:
-                flash(f'Could not read carrier image: {str(e)}', 'error')
                 return render_template('encode.html', day_of_week=day_of_week)
 
-            # Get date
+            # Validate PIN if provided
+            if pin:
+                valid, error = validate_pin(pin)
+                if not valid:
+                    flash(error, 'error')
+                    return render_template('encode.html', day_of_week=day_of_week)
+
+            # Validate RSA key if provided
+            if rsa_key_data:
+                valid, error, key_size = validate_rsa_key(rsa_key_data, rsa_password if rsa_password else None)
+                if not valid:
+                    flash(error, 'error')
+                    return render_template('encode.html', day_of_week=day_of_week)
+
+            # Validate carrier image
+            valid, error = validate_image(carrier_data, "Carrier image")
+            if not valid:
+                flash(error, 'error')
+                return render_template('encode.html', day_of_week=day_of_week)
+
+            # Get date - use client's local date if provided
+            client_date = request.form.get('client_date', '').strip()
+            if client_date and len(client_date) == 10 and client_date[4] == '-' and client_date[7] == '-':
+                date_str = client_date
+            else:
                 date_str = datetime.now().strftime('%Y-%m-%d')
 
             # Encrypt
-            encrypted = encrypt_message(message, ref_data, day_phrase, date_str, pin)
+            encrypted = encrypt_message(message, ref_data, day_phrase, date_str, pin, rsa_key_data)
 
             # Get pixel key
-            pixel_key = derive_pixel_key(ref_data, day_phrase, date_str, pin)
+            pixel_key = derive_pixel_key(ref_data, day_phrase, date_str, pin, rsa_key_data)
 
             # Embed
             stego_data, stats = embed_in_image(carrier_data, encrypted, pixel_key)
 
             # Generate filename and file ID
-            filename = f'{secrets.token_hex(4)}_{datetime.now().strftime("%Y%m%d")}.png'
+            filename = f'{secrets.token_hex(4)}_{date_str.replace("-", "")}.png'
             file_id = secrets.token_urlsafe(16)
 
             # Store temporarily for download/share
-            cleanup_temp_files()  # Clean old files first
+            cleanup_temp_files()
             TEMP_FILES[file_id] = {
                 'data': stego_data,
                 'filename': filename,
@@ -625,6 +816,7 @@ def decode():
             # Get files
             ref_photo = request.files.get('reference_photo')
             stego_image = request.files.get('stego_image')
+            rsa_key_file = request.files.get('rsa_key')
 
             if not ref_photo or not stego_image:
                 flash('Both reference photo and stego image are required', 'error')
@@ -632,7 +824,8 @@ def decode():
 
             # Get form data
             day_phrase = request.form.get('day_phrase', '')
-            pin = request.form.get('pin', '')
+            pin = request.form.get('pin', '').strip()
+            rsa_password = request.form.get('rsa_password', '')
 
             if not day_phrase:
                 flash('Day phrase is required', 'error')
@@ -641,32 +834,50 @@ def decode():
             # Read files
             ref_data = ref_photo.read()
             stego_data = stego_image.read()
+            rsa_key_data = rsa_key_file.read() if rsa_key_file and rsa_key_file.filename else None
+
+            # Validate security factors
+            valid, error = validate_security_factors(pin, rsa_key_data)
+            if not valid:
+                flash(error, 'error')
+                return render_template('decode.html')
+
+            # Validate PIN if provided
+            if pin:
+                valid, error = validate_pin(pin)
+                if not valid:
+                    flash(error, 'error')
+                    return render_template('decode.html')
+
+            # Validate RSA key if provided
+            if rsa_key_data:
+                valid, error, key_size = validate_rsa_key(rsa_key_data, rsa_password if rsa_password else None)
+                if not valid:
+                    flash(error, 'error')
+                    return render_template('decode.html')
 
             # Try to extract and decrypt
-            # We need to try with today's date first for pixel key
             date_str = datetime.now().strftime('%Y-%m-%d')
-            pixel_key = derive_pixel_key(ref_data, day_phrase, date_str, pin)
+            pixel_key = derive_pixel_key(ref_data, day_phrase, date_str, pin, rsa_key_data)
 
             encrypted = extract_from_image(stego_data, pixel_key)
 
             if encrypted:
-                # Parse to get actual date
                 header = parse_header(encrypted)
                 if header and header['date'] != date_str:
-                    # Re-extract with correct date
+                    pixel_key = derive_pixel_key(ref_data, day_phrase, header['date'], pin, rsa_key_data)
-                    pixel_key = derive_pixel_key(ref_data, day_phrase, header['date'], pin)
                     encrypted = extract_from_image(stego_data, pixel_key)
 
             if not encrypted:
                 flash('Could not extract data. Check your inputs.', 'error')
                 return render_template('decode.html')
 
-            message = decrypt_message(encrypted, ref_data, day_phrase, pin)
+            message = decrypt_message(encrypted, ref_data, day_phrase, pin, rsa_key_data)
 
             if message:
                 return render_template('decode.html', decoded_message=message)
             else:
-                flash('Decryption failed. Wrong phrase, PIN, or reference photo.', 'error')
+                flash('Decryption failed. Wrong phrase, PIN, RSA key, or reference photo.', 'error')
                 return render_template('decode.html')
 
         except Exception as e:

static/style.css

@@ -226,6 +226,15 @@ footer {
     background: rgba(0, 0, 0, 0.2);
 }
 
+/* ----------------------------------------------------------------------------
+   Custom Alert Variants
+   ---------------------------------------------------------------------------- */
+.alert-success-bright {
+    background: rgba(34, 197, 94, 0.2);
+    border-color: #22c55e;
+    color: #4ade80;
+}
+
 /* ----------------------------------------------------------------------------
    Utility Classes
    ---------------------------------------------------------------------------- */

templates/decode.html

@@ -49,7 +49,7 @@
                             <label class="form-label">
                                 <i class="bi bi-file-earmark-image me-1"></i> Stego Image
                             </label>
-                            <div class="drop-zone">
+                            <div class="drop-zone" id="stegoDropZone">
                                 <input type="file" name="stego_image" accept="image/*" required>
                                 <div class="drop-zone-label">
                                     <i class="bi bi-cloud-arrow-up fs-3 d-block mb-2 text-muted"></i>
@@ -63,9 +63,8 @@
                         </div>
                     </div>
                     
-                    <div class="row">
+                    <div class="mb-3">
-                        <div class="col-md-8 mb-3">
+                        <label class="form-label" id="dayPhraseLabel">
-                            <label class="form-label">
                             <i class="bi bi-chat-quote me-1"></i> Day Phrase
                         </label>
                         <input type="text" name="day_phrase" class="form-control" 
@@ -75,16 +74,47 @@
                         </div>
                     </div>
                     
-                        <div class="col-md-4 mb-3">
+                    <hr class="my-4">
+                    
+                    <h6 class="text-muted mb-3">
+                        SECURITY FACTORS 
+                        <span class="text-warning small">(provide same factors used during encoding)</span>
+                    </h6>
+                    
+                    <div class="row">
+                        <div class="col-md-6 mb-3">
                             <label class="form-label">
                                 <i class="bi bi-123 me-1"></i> PIN
                             </label>
-                            <input type="password" name="pin" class="form-control" 
+                            <input type="password" name="pin" class="form-control" id="pinInput"
-                                   placeholder="123456" maxlength="10">
+                                   placeholder="6-9 digits" maxlength="9">
                             <div class="form-text">
-                                Your static 6-digit PIN
+                                If PIN was used during encoding
                             </div>
                         </div>
+                        
+                        <div class="col-md-6 mb-3">
+                            <label class="form-label">
+                                <i class="bi bi-file-earmark-lock me-1"></i> RSA Key
+                            </label>
+                            <input type="file" name="rsa_key" class="form-control" id="rsaKeyInput"
+                                   accept=".pem,.key">
+                            <div class="form-text">
+                                If RSA key was used during encoding
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <!-- RSA Key Password (shown when key selected) -->
+                    <div class="mb-3 d-none" id="rsaPasswordGroup">
+                        <label class="form-label">
+                            <i class="bi bi-key me-1"></i> RSA Key Password
+                        </label>
+                        <input type="password" name="rsa_password" class="form-control"
+                               placeholder="Password for the .pem file (if encrypted)">
+                        <div class="form-text">
+                            Leave blank if your key file is not password-protected
+                        </div>
                     </div>
                     
                     <button type="submit" class="btn btn-primary btn-lg w-100" id="decodeBtn">
@@ -108,13 +138,17 @@
                         <i class="bi bi-dot"></i>
                         Use the phrase for the <strong>day the message was encoded</strong>, not today
                     </li>
+                    <li class="mb-2">
+                        <i class="bi bi-dot"></i>
+                        Provide the <strong>same security factors</strong> (PIN and/or RSA key) used during encoding
+                    </li>
                     <li class="mb-2">
                         <i class="bi bi-dot"></i>
                         Ensure the stego image hasn't been <strong>resized or recompressed</strong>
                     </li>
                     <li class="mb-0">
                         <i class="bi bi-dot"></i>
-                        Double-check your <strong>PIN</strong> is correct
+                        If using an RSA key, make sure the <strong>password is correct</strong>
                     </li>
                 </ul>
             </div>
@@ -132,13 +166,44 @@ document.getElementById('decodeForm')?.addEventListener('submit', function() {
     btn.disabled = true;
 });
 
+// Show RSA password field when key is selected
+const rsaKeyInput = document.getElementById('rsaKeyInput');
+const rsaPasswordGroup = document.getElementById('rsaPasswordGroup');
+
+rsaKeyInput?.addEventListener('change', function() {
+    rsaPasswordGroup.classList.toggle('d-none', !this.files.length);
+});
+
+// Day names for date detection
+const dayNames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+
+// Detect day from filename
+function detectDayFromFilename(filename) {
+    const dateMatch = filename.match(/_(\d{4})[-]?(\d{2})[-]?(\d{2})/);
+    
+    if (dateMatch) {
+        const [, year, month, day] = dateMatch;
+        const date = new Date(year, month - 1, day);
+        return dayNames[date.getDay()];
+    }
+    return null;
+}
+
+// Update day phrase label
+function updateDayLabel(dayName) {
+    const label = document.getElementById('dayPhraseLabel');
+    if (label && dayName) {
+        label.innerHTML = `<i class="bi bi-chat-quote me-1"></i> ${dayName}'s Phrase`;
+    }
+}
+
 // Drag & drop with preview
 document.querySelectorAll('.drop-zone').forEach(zone => {
     const input = zone.querySelector('input[type="file"]');
     const label = zone.querySelector('.drop-zone-label');
     const preview = zone.querySelector('.drop-zone-preview');
+    const isStegoZone = zone.id === 'stegoDropZone';
     
-    // Drag events
     ['dragenter', 'dragover'].forEach(evt => {
         zone.addEventListener(evt, e => {
             e.preventDefault();
@@ -153,18 +218,28 @@ document.querySelectorAll('.drop-zone').forEach(zone => {
         });
     });
     
-    // Handle drop
     zone.addEventListener('drop', e => {
         if (e.dataTransfer.files.length) {
             input.files = e.dataTransfer.files;
-            showPreview(e.dataTransfer.files[0]);
+            const file = e.dataTransfer.files[0];
+            showPreview(file);
+            
+            if (isStegoZone) {
+                const dayName = detectDayFromFilename(file.name);
+                updateDayLabel(dayName);
+            }
         }
     });
     
-    // Handle click selection
     input.addEventListener('change', function() {
         if (this.files && this.files[0]) {
-            showPreview(this.files[0]);
+            const file = this.files[0];
+            showPreview(file);
+            
+            if (isStegoZone) {
+                const dayName = detectDayFromFilename(file.name);
+                updateDayLabel(dayName);
+            }
         }
     });
     

templates/encode.html

@@ -11,6 +11,8 @@
             </div>
             <div class="card-body">
                 <form method="POST" enctype="multipart/form-data" id="encodeForm">
+                    <input type="hidden" name="client_date" id="clientDate" value="">
+                    
                     <div class="row">
                         <div class="col-md-6 mb-3">
                             <label class="form-label">
@@ -64,9 +66,8 @@
                         </div>
                     </div>
                     
-                    <div class="row">
+                    <div class="mb-3">
-                        <div class="col-md-8 mb-3">
+                        <label class="form-label" id="dayPhraseLabel">
-                            <label class="form-label">
                             <i class="bi bi-chat-quote me-1"></i> {{ day_of_week }}'s Phrase
                         </label>
                         <input type="text" name="day_phrase" class="form-control" 
@@ -76,16 +77,47 @@
                         </div>
                     </div>
                     
-                        <div class="col-md-4 mb-3">
+                    <hr class="my-4">
+                    
+                    <h6 class="text-muted mb-3">
+                        SECURITY FACTORS 
+                        <span class="text-warning small">(provide at least one: PIN or RSA Key)</span>
+                    </h6>
+                    
+                    <div class="row">
+                        <div class="col-md-6 mb-3">
                             <label class="form-label">
                                 <i class="bi bi-123 me-1"></i> PIN
                             </label>
-                            <input type="password" name="pin" class="form-control" 
+                            <input type="password" name="pin" class="form-control" id="pinInput"
-                                   placeholder="123456" maxlength="10">
+                                   placeholder="6-9 digits" maxlength="9">
                             <div class="form-text">
-                                Your static 6-digit PIN
+                                Your static 6-9 digit PIN (if configured)
                             </div>
                         </div>
+                        
+                        <div class="col-md-6 mb-3">
+                            <label class="form-label">
+                                <i class="bi bi-file-earmark-lock me-1"></i> RSA Key
+                            </label>
+                            <input type="file" name="rsa_key" class="form-control" id="rsaKeyInput"
+                                   accept=".pem,.key">
+                            <div class="form-text">
+                                Your shared .pem key file (if configured)
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <!-- RSA Key Password (shown when key selected) -->
+                    <div class="mb-3 d-none" id="rsaPasswordGroup">
+                        <label class="form-label">
+                            <i class="bi bi-key me-1"></i> RSA Key Password
+                        </label>
+                        <input type="password" name="rsa_password" class="form-control"
+                               placeholder="Password for the .pem file (if encrypted)">
+                        <div class="form-text">
+                            Leave blank if your key file is not password-protected
+                        </div>
                     </div>
                     
                     <button type="submit" class="btn btn-primary btn-lg w-100" id="encodeBtn">
@@ -125,6 +157,34 @@
 
 {% block scripts %}
 <script>
+// Detect client's local date and day
+const now = new Date();
+const dayNames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+const localDay = dayNames[now.getDay()];
+const localDate = now.getFullYear() + '-' + 
+    String(now.getMonth() + 1).padStart(2, '0') + '-' + 
+    String(now.getDate()).padStart(2, '0');
+
+// Update day label to client's local day
+const dayLabel = document.getElementById('dayPhraseLabel');
+if (dayLabel) {
+    dayLabel.innerHTML = `<i class="bi bi-chat-quote me-1"></i> ${localDay}'s Phrase`;
+}
+
+// Set hidden field with client's local date for server
+const dateInput = document.getElementById('clientDate');
+if (dateInput) {
+    dateInput.value = localDate;
+}
+
+// Show RSA password field when key is selected
+const rsaKeyInput = document.getElementById('rsaKeyInput');
+const rsaPasswordGroup = document.getElementById('rsaPasswordGroup');
+
+rsaKeyInput.addEventListener('change', function() {
+    rsaPasswordGroup.classList.toggle('d-none', !this.files.length);
+});
+
 // Form submit loading state
 document.getElementById('encodeForm').addEventListener('submit', function(e) {
     const btn = document.getElementById('encodeBtn');
@@ -146,10 +206,7 @@ messageInput.addEventListener('input', function() {
     const pct = Math.round((len / maxChars) * 100);
     charPercent.textContent = pct + '%';
     
-    // Warning at 80%
     charWarning.classList.toggle('d-none', len < maxChars * 0.8);
-    
-    // Red text when near/over limit
     charCount.classList.toggle('text-danger', len > maxChars * 0.95);
 });
 
@@ -159,7 +216,6 @@ document.querySelectorAll('.drop-zone').forEach(zone => {
     const label = zone.querySelector('.drop-zone-label');
     const preview = zone.querySelector('.drop-zone-preview');
     
-    // Drag events
     ['dragenter', 'dragover'].forEach(evt => {
         zone.addEventListener(evt, e => {
             e.preventDefault();
@@ -174,7 +230,6 @@ document.querySelectorAll('.drop-zone').forEach(zone => {
         });
     });
     
-    // Handle drop
     zone.addEventListener('drop', e => {
         if (e.dataTransfer.files.length) {
             input.files = e.dataTransfer.files;
@@ -182,7 +237,6 @@ document.querySelectorAll('.drop-zone').forEach(zone => {
         }
     });
     
-    // Handle click selection
     input.addEventListener('change', function() {
         if (this.files && this.files[0]) {
             showPreview(this.files[0]);

templates/generate.html

@@ -1,23 +1,22 @@
 {% extends "base.html" %}
 
-{% block title %}Generate Phrase Card - Stegasoo{% endblock %}
+{% block title %}Generate Credentials - Stegasoo{% endblock %}
 
 {% block content %}
 <div class="row justify-content-center">
     <div class="col-lg-8">
         <div class="card">
             <div class="card-header">
-                <h5 class="mb-0"><i class="bi bi-key-fill me-2"></i>Generate Phrase Card + PIN</h5>
+                <h5 class="mb-0"><i class="bi bi-key-fill me-2"></i>Generate Credentials</h5>
             </div>
             <div class="card-body">
                 {% if not generated %}
                 <p class="text-muted mb-4">
-                    Generate your weekly phrase card and static PIN. Customize your security level:
+                    Generate your weekly phrase card and security factors. You must choose at least one: PIN or RSA Key.
                 </p>
                 
-                <form method="POST">
+                <form method="POST" id="generateForm">
-                    <div class="row">
+                    <div class="mb-4">
-                        <div class="col-md-6 mb-3">
                         <label class="form-label">Words per phrase</label>
                         <select name="words_per_phrase" class="form-select" id="wordsSelect">
                             <option value="3" selected>3 words (~33 bits)</option>
@@ -34,20 +33,56 @@
                         <div class="form-text">More words = more security, harder to memorize</div>
                     </div>
                     
-                        <div class="col-md-6 mb-3">
+                    <hr class="my-4">
+                    
+                    <h6 class="text-muted mb-3">SECURITY FACTORS <span class="text-warning">(select at least one)</span></h6>
+                    
+                    <!-- PIN Option -->
+                    <div class="card mb-3" style="background: rgba(0,0,0,0.2);">
+                        <div class="card-body">
+                            <div class="form-check mb-3">
+                                <input class="form-check-input" type="checkbox" name="use_pin" id="usePin" checked>
+                                <label class="form-check-label fw-bold" for="usePin">
+                                    <i class="bi bi-123 me-1"></i> PIN
+                                </label>
+                            </div>
+                            <div id="pinOptions">
                                 <label class="form-label">PIN length</label>
                                 <select name="pin_length" class="form-select" id="pinSelect">
                                     <option value="6" selected>6 digits (~20 bits)</option>
                                     <option value="7">7 digits (~23 bits)</option>
                                     <option value="8">8 digits (~27 bits)</option>
+                                    <option value="9">9 digits (~30 bits)</option>
                                 </select>
-                            <div class="form-text">Same PIN used every day</div>
+                                <div class="form-text">Memorizable, same PIN used every day</div>
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <!-- RSA Key Option -->
+                    <div class="card mb-3" style="background: rgba(0,0,0,0.2);">
+                        <div class="card-body">
+                            <div class="form-check mb-3">
+                                <input class="form-check-input" type="checkbox" name="use_rsa" id="useRsa">
+                                <label class="form-check-label fw-bold" for="useRsa">
+                                    <i class="bi bi-file-earmark-lock me-1"></i> RSA Key
+                                </label>
+                            </div>
+                            <div id="rsaOptions" class="d-none">
+                                <label class="form-label">Key size</label>
+                                <select name="rsa_bits" class="form-select" id="rsaSelect">
+                                    <option value="2048" selected>2048-bit (~128 bits effective)</option>
+                                    <option value="3072">3072-bit (~128 bits effective)</option>
+                                    <option value="4096">4096-bit (~128 bits effective)</option>
+                                </select>
+                                <div class="form-text">File-based key, both parties need the same .pem file</div>
+                            </div>
                         </div>
                     </div>
                     
                     <div class="alert alert-info mb-4">
                         <div class="d-flex justify-content-between align-items-center">
-                            <span><i class="bi bi-calculator me-2"></i>Estimated phrase+PIN entropy:</span>
+                            <span><i class="bi bi-calculator me-2"></i>Estimated entropy:</span>
                             <strong id="entropyDisplay">~53 bits</strong>
                         </div>
                         <div class="progress mt-2" style="height: 8px;">
@@ -59,33 +94,33 @@
                         </small>
                     </div>
                     
-                    <!--<div class="form-check mb-4">
+                    <div class="alert alert-warning d-none" id="noFactorWarning">
-                        <input class="form-check-input" type="checkbox" name="generate_stories" id="generateStories" checked>
+                        <i class="bi bi-exclamation-triangle me-2"></i>
-                        <label class="form-check-label" for="generateStories">
+                        You must select at least one security factor (PIN or RSA Key)
-                            <i class="bi bi-book me-2"></i>Generate memory aid stories
+                    </div>
-                            {% if has_ml %}<span class="badge bg-success ms-2">AI-powered</span>{% else %}<span class="badge bg-secondary ms-2">Template-based</span>{% endif %}
-                        </label>
-                        <div class="form-text">Creates memorable stories to help you remember each day's phrase</div>
-                    </div>-->
                     
                     <button type="submit" class="btn btn-primary btn-lg w-100" id="generateBtn">
-                        <i class="bi bi-shuffle me-2"></i>Generate New Credentials
+                        <i class="bi bi-shuffle me-2"></i>Generate Credentials
                     </button>
                 </form>
+                
                 {% else %}
                 
-                <div class="alert alert-info">
+                <!-- Generated Results -->
-                    <i class="bi bi-exclamation-circle me-2"></i>
+                <div class="alert alert-success-bright alert-dismissible fade show">
-                    <strong>Credentials Generated!</strong> - Refresh to generate new credentials
+                    <i class="bi bi-check-circle me-2"></i>
+                    <strong>Credentials Generated!</strong>
+                    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
                 </div>
 
-                <div class="alert alert-warning">
+                <div class="alert alert-warning alert-dismissible fade show">
                     <i class="bi bi-exclamation-triangle me-2"></i>
-                    <strong>Memorize the information then close!</strong> - Do not save/screenshot
+                    <strong>Memorize phrases, save key securely, then close!</strong> - Do not screenshot
+                    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
                 </div>
                 
+                {% if pin %}
                 <hr class="my-4">
-
                 <div class="text-center mb-4">
                     <h6 class="text-muted mb-2">YOUR STATIC PIN</h6>
                     <div class="pin-container">
@@ -95,6 +130,55 @@
                         <small class="text-muted">Use this {{ pin_length }}-digit PIN every day</small>
                     </div>
                 </div>
+                {% endif %}
+                
+                {% if rsa_key_pem %}
+                <hr class="my-4">
+                <div class="mb-4">
+                    <h6 class="text-muted mb-3">
+                        <i class="bi bi-file-earmark-lock me-2"></i>YOUR RSA KEY ({{ rsa_bits }}-bit)
+                    </h6>
+                    
+                    <div class="alert alert-danger small">
+                        <i class="bi bi-shield-exclamation me-1"></i>
+                        <strong>Save this key securely!</strong> Share it with your recipient through a secure channel. You cannot recover it later.
+                    </div>
+                    
+                    <!-- Key Display -->
+                    <div class="mb-3">
+                        <textarea class="form-control font-monospace" id="rsaKeyText" rows="6" readonly style="font-size: 0.75rem;">{{ rsa_key_pem }}</textarea>
+                    </div>
+                    
+                    <!-- Copy to Clipboard -->
+                    <button type="button" class="btn btn-outline-light me-2" id="copyKeyBtn">
+                        <i class="bi bi-clipboard me-1"></i> Copy to Clipboard
+                    </button>
+                    
+                    <!-- Download with Password -->
+                    <button type="button" class="btn btn-outline-light" data-bs-toggle="collapse" data-bs-target="#downloadKeyForm">
+                        <i class="bi bi-download me-1"></i> Download as .pem
+                    </button>
+                    
+                    <div class="collapse mt-3" id="downloadKeyForm">
+                        <div class="card" style="background: rgba(0,0,0,0.2);">
+                            <div class="card-body">
+                                <form method="POST" action="{{ url_for('download_key') }}">
+                                    <input type="hidden" name="key_pem" value="{{ rsa_key_pem }}">
+                                    <div class="mb-3">
+                                        <label class="form-label">Password to protect key file</label>
+                                        <input type="password" name="key_password" class="form-control" 
+                                               placeholder="Minimum 8 characters" minlength="8" required>
+                                        <div class="form-text">You'll need this password when using the key</div>
+                                    </div>
+                                    <button type="submit" class="btn btn-primary">
+                                        <i class="bi bi-file-earmark-lock me-1"></i> Download Protected Key
+                                    </button>
+                                </form>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                {% endif %}
                 
                 <hr class="my-4">
                 
@@ -126,15 +210,23 @@
                 <div class="alert alert-success mt-4">
                     <h6><i class="bi bi-shield-check me-2"></i>Security Summary</h6>
                     <div class="row text-center mt-3">
-                        <div class="col-4">
+                        <div class="col-3">
                             <div class="fs-4 fw-bold">{{ phrase_entropy }}</div>
                             <small class="text-muted">bits/phrase</small>
                         </div>
-                        <div class="col-4">
+                        {% if pin %}
+                        <div class="col-3">
                             <div class="fs-4 fw-bold">{{ pin_entropy }}</div>
                             <small class="text-muted">bits/PIN</small>
                         </div>
-                        <div class="col-4">
+                        {% endif %}
+                        {% if rsa_key_pem %}
+                        <div class="col-3">
+                            <div class="fs-4 fw-bold">{{ rsa_entropy }}</div>
+                            <small class="text-muted">bits/RSA</small>
+                        </div>
+                        {% endif %}
+                        <div class="col-3">
                             <div class="fs-4 fw-bold text-success">{{ total_entropy }}</div>
                             <small class="text-muted">bits total</small>
                         </div>
@@ -144,36 +236,6 @@
                     </small>
                 </div>
                 
-                <div class="alert alert-info mt-4">
-                    <h6><i class="bi bi-lightbulb me-2"></i>Memorization Tip</h6>
-                    <p class="mb-1">
-                        <strong>Total to memorize:</strong> {{ words_per_phrase * 7 }} words + {{ pin_length }} digits
-                    </p>
-                    <p class="mb-0 small">
-                        Create a story for each day: "On Monday, the <em>[word1]</em> and <em>[word2]</em> went to see <em>[word3]</em>..."
-                    </p>
-                </div>
-                
-                {% if stories %}
-                <hr class="my-4">
-                
-                <h6 class="text-muted mb-3">
-                    <i class="bi bi-book me-2"></i>MEMORY AID STORIES
-                    {% if has_ml %}<span class="badge bg-success ms-2">AI-generated</span>{% else %}<span class="badge bg-secondary ms-2">Template-based</span>{% endif %}
-                </h6>
-                <p class="text-muted small mb-3">
-                    Passphrase words are shown in <span class="story-word">RED CAPS</span>. 
-                    Read each story to help memorize your phrases.
-                </p>
-                
-                {% for day in days %}
-                <div class="story-card">
-                    <div class="day-label"><i class="bi bi-calendar3 me-2"></i>{{ day }}</div>
-                    <div>{{ stories[day].story_html|safe }}</div>
-                </div>
-                {% endfor %}
-                {% endif %}
-                
                 <a href="/generate" class="btn btn-outline-light btn-lg w-100 mt-3">
                     <i class="bi bi-arrow-repeat me-2"></i>Generate New Credentials
                 </a>
@@ -186,47 +248,98 @@
 {% endblock %}
 
 {% block scripts %}
-{% if not generated %}
 <script>
+{% if not generated %}
+const usePinCheckbox = document.getElementById('usePin');
+const useRsaCheckbox = document.getElementById('useRsa');
+const pinOptions = document.getElementById('pinOptions');
+const rsaOptions = document.getElementById('rsaOptions');
+const noFactorWarning = document.getElementById('noFactorWarning');
+const generateBtn = document.getElementById('generateBtn');
+
+// Toggle option visibility
+usePinCheckbox.addEventListener('change', function() {
+    pinOptions.classList.toggle('d-none', !this.checked);
+    validateFactors();
+    updateEntropy();
+});
+
+useRsaCheckbox.addEventListener('change', function() {
+    rsaOptions.classList.toggle('d-none', !this.checked);
+    validateFactors();
+    updateEntropy();
+});
+
+function validateFactors() {
+    const hasPin = usePinCheckbox.checked;
+    const hasRsa = useRsaCheckbox.checked;
+    const valid = hasPin || hasRsa;
+    
+    noFactorWarning.classList.toggle('d-none', valid);
+    generateBtn.disabled = !valid;
+}
+
 function updateEntropy() {
     const words = parseInt(document.getElementById('wordsSelect').value);
+    const usePin = usePinCheckbox.checked;
+    const useRsa = useRsaCheckbox.checked;
     const pinLen = parseInt(document.getElementById('pinSelect').value);
     
     const phraseEntropy = words * 11;
-    const pinEntropy = Math.floor(pinLen * 3.32);
+    const pinEntropy = usePin ? Math.floor(pinLen * 3.32) : 0;
-    const total = phraseEntropy + pinEntropy;
+    const rsaEntropy = useRsa ? 128 : 0;
+    const total = phraseEntropy + pinEntropy + rsaEntropy;
     
     document.getElementById('entropyDisplay').textContent = '~' + total + ' bits';
     
-    // Update progress bar (scale: 50 bits = 40%, 150 bits = 100%)
+    // Update progress bar
-    const pct = Math.min(100, Math.max(10, (total - 30) * 0.7));
+    const pct = Math.min(100, Math.max(10, (total - 30) * 0.5));
     document.getElementById('entropyBar').style.width = pct + '%';
     
     // Update description
     let desc;
     if (total < 50) desc = 'Basic security';
-    else if (total < 70) desc = 'Good for most use cases';
+    else if (total < 80) desc = 'Good for most use cases';
-    else if (total < 100) desc = 'Strong security';
+    else if (total < 120) desc = 'Strong security';
-    else if (total < 130) desc = 'Very strong security';
+    else if (total < 180) desc = 'Very strong security';
-    else desc = 'Extreme security (hard to memorize!)';
+    else desc = 'Maximum security';
     
     document.getElementById('entropyDesc').textContent = desc;
 }
 
 document.getElementById('wordsSelect').addEventListener('change', updateEntropy);
 document.getElementById('pinSelect').addEventListener('change', updateEntropy);
+document.getElementById('rsaSelect').addEventListener('change', updateEntropy);
 
-// Loading state for generate button
+// Form submit
-document.querySelector('form').addEventListener('submit', function() {
+document.getElementById('generateForm').addEventListener('submit', function(e) {
-    const btn = document.getElementById('generateBtn');
+    if (!usePinCheckbox.checked && !useRsaCheckbox.checked) {
-    const storiesChecked = document.getElementById('generateStories')?.checked;
+        e.preventDefault();
-    btn.disabled = true;
+        noFactorWarning.classList.remove('d-none');
-    if (storiesChecked) {
+        return;
-        btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Generating stories...';
-    } else {
-        btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Generating...';
     }
+    
+    generateBtn.disabled = true;
+    generateBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Generating...';
 });
-</script>
+
+// Initial state
+validateFactors();
+updateEntropy();
+
+{% else %}
+
+// Copy RSA key to clipboard
+document.getElementById('copyKeyBtn')?.addEventListener('click', function() {
+    const keyText = document.getElementById('rsaKeyText');
+    navigator.clipboard.writeText(keyText.value).then(() => {
+        this.innerHTML = '<i class="bi bi-check me-1"></i> Copied!';
+        setTimeout(() => {
+            this.innerHTML = '<i class="bi bi-clipboard me-1"></i> Copy to Clipboard';
+        }, 2000);
+    });
+});
+
 {% endif %}
+</script>
 {% endblock %}