Add Admin Recovery System with multiple backup options

- Recovery key generation (32-char alphanumeric, dashed format)
- Multiple backup methods: text file, QR code, stego image
- QR codes obfuscated with XOR (RECOVERY_OBFUSCATION_KEY constant)
- Stego backup hides key in image using Stegasoo itself
- CLI: `stegasoo admin recover --db path/to/db`
- Web routes: /recover, /account/recovery/regenerate
- Toast notifications now auto-dismiss after 20s with fade
- Updated WEB_UI.md and CLI.md documentation for v4.1.0

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Aaron D. Lee
2026-01-04 02:27:06 -05:00
parent 01f0173dd4
commit 80dc22f150
16 changed files with 1989 additions and 36 deletions

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@@ -5,6 +5,38 @@ All notable changes to Stegasoo will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org). and this project adheres to [Semantic Versioning](https://semver.org).
## [4.1.0] - 2026-01-04
### Added
- **Admin Recovery System**: Password reset for locked-out admins
- Recovery key generated during setup (32-char alphanumeric)
- Multiple backup options: text file, QR code, stego image
- QR codes obfuscated (XOR'd with magic header hash)
- Stego backups hide key in an image using Stegasoo itself
- CLI: `stegasoo admin recover --db path/to/db`
- **EXIF Editor**: Full metadata editing in Tools page
- View all EXIF fields from uploaded image
- Inline editing of individual fields
- Clear all metadata with one click
- Download cleaned image
- CLI: `stegasoo tools exif image.jpg [--clear] [--set Field=Value]`
- **Multi-User Support**: Admin can create up to 16 additional users
- Role-based access control (admin/user)
- Admin user management page
- Temp password generation for new users
- **Saved Channel Keys**: Users can save/manage channel keys in account page
### Changed
- **Architecture**: Consolidated `resolve_channel_key()` to library layer
- Single source of truth in `src/stegasoo/channel.py`
- CLI, API, WebUI now use thin wrappers
- **DCT Pre-Check**: Fail fast with helpful error before expensive encoding
- **Toast Notifications**: Auto-dismiss after 20 seconds with fade animation
- `RECOVERY_OBFUSCATION_KEY` constant added to `constants.py`
### Fixed
- DCT payload size error now caught early with clear message
## [4.0.2] - 2026-01-02 ## [4.0.2] - 2026-01-02
### Added ### Added

180
CLI.md
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@@ -1,11 +1,11 @@
# Stegasoo CLI Documentation (v4.0.2) # Stegasoo CLI Documentation (v4.1.0)
Complete command-line interface reference for Stegasoo steganography operations. Complete command-line interface reference for Stegasoo steganography operations.
## Table of Contents ## Table of Contents
- [Installation](#installation) - [Installation](#installation)
- [What's New in v4.0.0](#whats-new-in-v400) - [What's New in v4.1.0](#whats-new-in-v410)
- [Quick Start](#quick-start) - [Quick Start](#quick-start)
- [Commands](#commands) - [Commands](#commands)
- [generate](#generate-command) - [generate](#generate-command)
@@ -13,10 +13,11 @@ Complete command-line interface reference for Stegasoo steganography operations.
- [decode](#decode-command) - [decode](#decode-command)
- [verify](#verify-command) - [verify](#verify-command)
- [channel](#channel-command) - [channel](#channel-command)
- [admin](#admin-command)
- [tools](#tools-command)
- [info](#info-command) - [info](#info-command)
- [compare](#compare-command) - [compare](#compare-command)
- [modes](#modes-command) - [modes](#modes-command)
- [strip-metadata](#strip-metadata-command)
- [Channel Keys](#channel-keys) - [Channel Keys](#channel-keys)
- [Embedding Modes](#embedding-modes) - [Embedding Modes](#embedding-modes)
- [Security Factors](#security-factors) - [Security Factors](#security-factors)
@@ -65,9 +66,28 @@ stegasoo channel show
--- ---
## What's New in v4.1.0
Version 4.1.0 adds **admin recovery** and **tools** commands:
| Feature | Description |
|---------|-------------|
| Admin recovery | Reset admin password using recovery key |
| EXIF tools | View, edit, and strip image metadata |
| Peek tool | Quick stego detection check |
| Strip tool | Remove hidden data from images |
**New commands:**
- `stegasoo admin recover` - Reset admin password with recovery key
- `stegasoo tools exif` - View/edit EXIF metadata
- `stegasoo tools peek` - Check for hidden data
- `stegasoo tools strip` - Remove stego data from image
---
## What's New in v4.0.0 ## What's New in v4.0.0
Version 4.0.0 adds **channel key** support for deployment/group isolation: Version 4.0.0 added **channel key** support for deployment/group isolation:
| Feature | Description | | Feature | Description |
|---------|-------------| |---------|-------------|
@@ -76,14 +96,6 @@ Version 4.0.0 adds **channel key** support for deployment/group isolation:
| CLI management | New `stegasoo channel` command group | | CLI management | New `stegasoo channel` command group |
| Flexible override | Use server config, explicit key, or public mode | | Flexible override | Use server config, explicit key, or public mode |
**Key benefits:**
- ✅ Isolate messages between teams, deployments, or groups
- ✅ Same credentials can't decode messages from different channels
- ✅ Backward compatible (public mode = no channel key)
- ✅ Easy key distribution via environment variables or config files
**Breaking change:** v4.0.0 messages (with channel key) cannot be decoded by v3.x installations.
--- ---
## Quick Start ## Quick Start
@@ -495,12 +507,150 @@ Now also displays channel key status.
--- ---
### Strip-Metadata Command ### Admin Command
Remove all metadata from an image. Manage Web UI admin accounts and recovery.
#### Subcommands
| Subcommand | Description |
|------------|-------------|
| `recover` | Reset admin password using recovery key |
#### admin recover
Reset the admin password for a Web UI database.
```bash ```bash
stegasoo strip-metadata IMAGE [OPTIONS] stegasoo admin recover --db PATH [OPTIONS]
```
| Option | Short | Type | Required | Description |
|--------|-------|------|----------|-------------|
| `--db` | `-d` | path | ✓ | Path to stegasoo.db file |
| `--key` | `-k` | string | | Recovery key (prompted if not provided) |
| `--password` | `-p` | string | | New password (prompted if not provided) |
**Examples:**
```bash
# Interactive mode (prompts for key and password)
stegasoo admin recover --db frontends/web/instance/stegasoo.db
# Non-interactive mode
stegasoo admin recover \
--db /path/to/stegasoo.db \
--key "XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX" \
--password "NewSecurePassword123"
```
**Recovery process:**
1. The recovery key is verified against the database hash
2. If valid, the admin password is reset
3. User can now log in with the new password
**Note:** Recovery keys are instance-bound. A key from one database won't work on another.
---
### Tools Command
Image utilities and analysis tools.
#### Subcommands
| Subcommand | Description |
|------------|-------------|
| `exif` | View/edit EXIF metadata |
| `peek` | Check for hidden data |
| `strip` | Remove stego data from image |
#### tools exif
View and edit EXIF metadata in images.
```bash
stegasoo tools exif IMAGE [OPTIONS]
```
| Option | Type | Description |
|--------|------|-------------|
| `--clear` | flag | Remove all EXIF metadata |
| `--set FIELD=VALUE` | string | Set a specific EXIF field |
| `--output` / `-o` | path | Output filename (default: overwrites input) |
| `--json` | flag | Output as JSON |
**Examples:**
```bash
# View all EXIF data
stegasoo tools exif photo.jpg
# View as JSON
stegasoo tools exif photo.jpg --json
# Clear all metadata
stegasoo tools exif photo.jpg --clear -o clean.jpg
# Set specific fields
stegasoo tools exif photo.jpg \
--set "Artist=John Doe" \
--set "Copyright=2026" \
-o tagged.jpg
# Remove GPS data only
stegasoo tools exif photo.jpg \
--set "GPSLatitude=" \
--set "GPSLongitude=" \
-o no-gps.jpg
```
#### tools peek
Check if an image contains hidden Stegasoo data.
```bash
stegasoo tools peek IMAGE [OPTIONS]
```
| Option | Type | Description |
|--------|------|-------------|
| `--json` | flag | Output as JSON |
| `--quiet` / `-q` | flag | Exit code only (0=found, 1=not found) |
**Examples:**
```bash
# Check for hidden data
stegasoo tools peek suspicious.png
# Script-friendly check
if stegasoo tools peek image.png -q; then
echo "Contains hidden data"
fi
```
#### tools strip
Remove hidden stego data from an image (destructive).
```bash
stegasoo tools strip IMAGE [OPTIONS]
```
| Option | Type | Description |
|--------|------|-------------|
| `--output` / `-o` | path | Output filename |
| `--force` / `-f` | flag | Overwrite without confirmation |
**Examples:**
```bash
# Strip and save to new file
stegasoo tools strip stego.png -o clean.png
# Strip in place (with confirmation)
stegasoo tools strip stego.png
``` ```
--- ---

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@@ -481,3 +481,58 @@ Reviewed modules for consistency with Library → CLI → API → WebUI pattern:
| generate | ✓ | ✓ | - | ✓ | CLI has `stegasoo generate` | | generate | ✓ | ✓ | - | ✓ | CLI has `stegasoo generate` |
Priority order: Developer/CLI → API integrator → WebUI end-user Priority order: Developer/CLI → API integrator → WebUI end-user
---
## Admin Recovery System (4.1.0) ✅ DONE
Password reset capability for locked-out admins with multiple backup options.
### Library Layer (`src/stegasoo/recovery.py`)
```python
# Key generation and validation
generate_recovery_key() -> str # XXXX-XXXX-XXXX-... (32 chars)
hash_recovery_key(key) -> str # SHA-256 for storage
verify_recovery_key(key, hash) -> bool
# QR code (obfuscated - scans as gibberish)
obfuscate_key(key) -> str # XOR with RECOVERY_OBFUSCATION_KEY
deobfuscate_key(data) -> str | None
generate_recovery_qr(key) -> bytes # PNG with obfuscated data
extract_key_from_qr(image) -> str | None
# Stego backup (hide key in an image)
create_stego_backup(key, carrier_image) -> bytes
extract_stego_backup(stego_image, reference) -> str | None
```
### Database (`app_settings` table)
- `recovery_key_hash` - SHA-256 of recovery key (or null if disabled)
### Web Routes
| Route | Method | Description |
|-------|--------|-------------|
| `/setup/recovery` | GET, POST | Step 2 of initial setup |
| `/recover` | GET, POST | Password reset page |
| `/recover/stego` | POST | Extract key from stego backup |
| `/account/recovery/regenerate` | GET, POST | Generate new key |
| `/account/recovery/disable` | POST | Remove recovery option |
| `/account/recovery/stego-backup` | POST | Create stego backup |
### CLI Commands
```bash
stegasoo admin recover --db path/to/stegasoo.db # Reset password
stegasoo admin generate-key [--qr] # Generate key (reference)
```
### Security Model
1. Recovery key shown once during setup - only hash stored
2. QR codes XOR'd with `RECOVERY_OBFUSCATION_KEY` (fixed in constants.py)
3. Stego backups use fixed internal passphrase/PIN - security is obscurity
4. Instance-bound: recovery key hash must match in target database
5. Options: text file, QR image, stego image, or no recovery (most secure)

248
WEB_UI.md
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@@ -1,18 +1,22 @@
# Stegasoo Web UI Documentation (v4.0.2) # Stegasoo Web UI Documentation (v4.1.0)
Complete guide for the Stegasoo web-based steganography interface. Complete guide for the Stegasoo web-based steganography interface.
## Table of Contents ## Table of Contents
- [Overview](#overview) - [Overview](#overview)
- [What's New in v4.0.2](#whats-new-in-v402) - [What's New in v4.1.0](#whats-new-in-v410)
- [Authentication & HTTPS](#authentication--https) - [Authentication & HTTPS](#authentication--https)
- [Admin Recovery](#admin-recovery)
- [Multi-User Support](#multi-user-support)
- [Installation & Setup](#installation--setup) - [Installation & Setup](#installation--setup)
- [Pages & Features](#pages--features) - [Pages & Features](#pages--features)
- [Home Page](#home-page) - [Home Page](#home-page)
- [Generate Credentials](#generate-credentials) - [Generate Credentials](#generate-credentials)
- [Encode Message](#encode-message) - [Encode Message](#encode-message)
- [Decode Message](#decode-message) - [Decode Message](#decode-message)
- [Tools Page](#tools-page)
- [Account Page](#account-page)
- [About Page](#about-page) - [About Page](#about-page)
- [Embedding Modes](#embedding-modes) - [Embedding Modes](#embedding-modes)
- [DCT Mode (Default)](#dct-mode-default) - [DCT Mode (Default)](#dct-mode-default)
@@ -54,9 +58,29 @@ Built with Flask, Bootstrap 5, and a modern dark theme.
--- ---
## What's New in v4.1.0
Version 4.1.0 adds admin recovery, multi-user support, and new tools:
| Feature | Description |
|---------|-------------|
| **Admin Recovery** | Password reset using secure recovery key |
| **Multi-User Support** | Up to 16 users with role-based access |
| **EXIF Editor** | View, edit, and strip image metadata |
| **Saved Channel Keys** | Users can save/manage channel keys in account |
| **Toast Improvements** | Auto-dismiss after 20 seconds with fade |
**Key benefits:**
- ✅ Never get locked out - recovery key backup options
- ✅ Share access with team members (admin/user roles)
- ✅ Full EXIF metadata control in Tools page
- ✅ Persistent channel key storage per user
---
## What's New in v4.0.2 ## What's New in v4.0.2
Version 4.0.2 adds authentication and HTTPS support for secure home network deployment: Version 4.0.2 added authentication and HTTPS support:
| Feature | Description | | Feature | Description |
|---------|-------------| |---------|-------------|
@@ -64,14 +88,6 @@ Version 4.0.2 adds authentication and HTTPS support for secure home network depl
| **First-run setup** | Wizard to create admin account on first access | | **First-run setup** | Wizard to create admin account on first access |
| **Account management** | Change password page | | **Account management** | Change password page |
| **Optional HTTPS** | Auto-generated self-signed certificates | | **Optional HTTPS** | Auto-generated self-signed certificates |
| **UI improvements** | Larger QR previews, consistent panel styling |
**Key benefits:**
- ✅ Secure your Web UI with username/password
- ✅ No manual database setup - automatic on first run
- ✅ HTTPS with auto-generated certs for home networks
- ✅ Configurable via environment variables
- ✅ Improved readability of QR preview panels
--- ---
@@ -182,6 +198,133 @@ services:
--- ---
## Admin Recovery
### Overview
If you forget your admin password, the recovery key is the ONLY way to reset it. Generate and save your recovery key immediately after setup.
### Recovery Key Format
```
XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX
└──────────────────────────────────────┘
32 alphanumeric characters (8 groups of 4)
```
### Backup Options
The recovery key can be saved in multiple ways:
| Method | Description | Security Level |
|--------|-------------|----------------|
| **Text file** | Plain text download | Low - store securely |
| **QR code** | Obfuscated PNG image | Medium - XOR'd with magic hash |
| **Stego image** | Hidden in carrier image | High - requires original image |
### Generating a Recovery Key
**During first-run setup:**
1. Complete the admin account wizard
2. You'll be prompted to save your recovery key
3. Choose backup method(s)
4. Confirm you've saved the key
**From Account page (admin only):**
1. Navigate to `/account`
2. Click "Generate Recovery Key" (or "Regenerate" if one exists)
3. Save using your preferred method
4. Check the confirmation box
5. Click "Save New Key"
### QR Code Obfuscation
QR codes are not plain text - they're XOR'd with a fixed obfuscation key derived from Stegasoo's magic headers. This prevents casual scanning from revealing the key.
### Stego Backup
Hide your recovery key inside an image using Stegasoo itself:
1. Upload a carrier image (JPG/PNG, 50KB-2MB)
2. Click the "Stego" button
3. Download the stego image
4. **Important:** Keep the original carrier image - you'll need it for extraction
### Recovering Your Password
**URL:** `/recover`
1. Navigate to the login page
2. Click "Forgot password?"
3. **Option A:** Enter recovery key directly
4. **Option B:** Extract from stego backup:
- Expand "Extract from stego backup"
- Upload your stego backup image
- Upload the original carrier/reference image
- Click "Extract Key"
5. Enter and confirm your new password
6. Click "Reset Password"
### CLI Recovery
For locked-out scenarios where you can't access the web UI:
```bash
stegasoo admin recover --db frontends/web/instance/stegasoo.db
```
You'll be prompted for your recovery key and new password.
### Important Notes
- Recovery keys are instance-bound (tied to the specific database)
- Regenerating a key invalidates the previous one
- Store backups in a secure, separate location
- Without a recovery key, the only option is to delete the database and reconfigure
---
## Multi-User Support
### Overview
Admins can create up to 16 additional users with role-based access control.
### Roles
| Role | Permissions |
|------|-------------|
| **Admin** | Full access: encode, decode, generate, tools, user management, recovery |
| **User** | Standard access: encode, decode, generate, account settings |
### User Management
**URL:** `/admin/users` (admin only)
#### Creating Users
1. Click "Add User"
2. Enter username
3. Select role (admin/user)
4. A temporary password is generated
5. Share the temporary password securely with the new user
6. User must change password on first login
#### Managing Users
- View all users and their roles
- Reset user passwords (generates new temp password)
- Change user roles
- Delete users (except yourself)
### User Limits
- Maximum 16 users total (including admin)
- At least one admin must exist
- Users can't delete or demote the last admin
---
## Installation & Setup ## Installation & Setup
### From PyPI ### From PyPI
@@ -549,6 +692,83 @@ If decryption fails:
--- ---
### Tools Page
**URL:** `/tools`
The Tools page provides utilities for image analysis and manipulation.
#### EXIF Editor
View and edit image metadata (EXIF data).
**Features:**
- View all EXIF fields from uploaded image
- Inline editing of individual fields
- Clear all metadata with one click
- Download cleaned image
**Usage:**
1. Upload an image (JPG recommended - richest EXIF data)
2. View all metadata fields in a table
3. Click any field to edit its value
4. Click "Save" to apply changes
5. Use "Clear All" to strip all metadata
6. Download the modified image
**Common EXIF fields:**
| Field | Description |
|-------|-------------|
| Make/Model | Camera manufacturer and model |
| DateTime | When the photo was taken |
| GPSLatitude/GPSLongitude | Location coordinates |
| Software | Editing software used |
| Artist | Photographer name |
**Privacy tip:** Always strip EXIF data before sharing images publicly to remove location and device information.
#### Peek (Stego Detection)
Quickly check if an image contains hidden data.
#### Strip Metadata
Remove all metadata from an image in one click.
---
### Account Page
**URL:** `/account`
Manage your account settings and preferences.
#### Password Change
1. Enter current password
2. Enter new password (minimum 8 characters)
3. Confirm new password
4. Click "Change Password"
#### Saved Channel Keys (v4.1.0)
Users can save frequently-used channel keys for quick access:
1. Click "Add Channel Key"
2. Enter a name/label for the key
3. Paste the channel key
4. Click "Save"
Saved keys appear in a dropdown during encode/decode operations.
#### Recovery Key Management (Admin only)
- View recovery key status (configured/not configured)
- Generate or regenerate recovery key
- Download backup options (text, QR, stego)
---
### About Page ### About Page
**URL:** `/about` **URL:** `/about`
@@ -556,10 +776,10 @@ If decryption fails:
Information about the Stegasoo project, security model, and credits. Information about the Stegasoo project, security model, and credits.
Includes: Includes:
- Version information (v3.3.0) - Version information (v4.1.0)
- Recent UI improvements - Feature highlights
- Security model overview - Security model overview
- Dependency status (Argon2, QR code support) - Dependency status (Argon2, scipy/DCT, QR code support)
--- ---

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@@ -48,6 +48,9 @@ from auth import (
get_user_by_id, get_user_by_id,
get_user_channel_keys, get_user_channel_keys,
get_username, get_username,
has_recovery_key,
get_recovery_key_hash,
clear_recovery_key,
is_admin, is_admin,
is_authenticated, is_authenticated,
login_required, login_required,
@@ -55,6 +58,8 @@ from auth import (
logout_user, logout_user,
reset_user_password, reset_user_password,
save_channel_key, save_channel_key,
set_recovery_key_hash,
verify_and_reset_admin_password,
update_channel_key_last_used, update_channel_key_last_used,
update_channel_key_name, update_channel_key_name,
user_exists, user_exists,
@@ -1586,7 +1591,7 @@ def logout():
@app.route("/setup", methods=["GET", "POST"]) @app.route("/setup", methods=["GET", "POST"])
def setup(): def setup():
"""First-run setup page - create admin account.""" """First-run setup page - create admin account (Step 1)."""
if not app.config.get("AUTH_ENABLED", True): if not app.config.get("AUTH_ENABLED", True):
return redirect(url_for("index")) return redirect(url_for("index"))
@@ -1608,14 +1613,219 @@ def setup():
if user: if user:
login_user(user) login_user(user)
session.permanent = True session.permanent = True
flash("Admin account created successfully!", "success") # Redirect to recovery key setup (Step 2)
return redirect(url_for("index")) return redirect(url_for("setup_recovery"))
else: else:
flash(message, "error") flash(message, "error")
return render_template("setup.html") return render_template("setup.html")
@app.route("/setup/recovery", methods=["GET", "POST"])
@login_required
def setup_recovery():
"""Recovery key setup page (Step 2 of initial setup)."""
from stegasoo.recovery import generate_recovery_key, hash_recovery_key, generate_recovery_qr
import base64
# Only allow during initial setup (no recovery key yet, first admin)
if has_recovery_key():
return redirect(url_for("index"))
current_user = get_current_user()
if current_user.role != "admin":
return redirect(url_for("index"))
if request.method == "POST":
action = request.form.get("action")
if action == "skip":
# No recovery key - most secure but no way to recover
flash("Setup complete. No recovery key configured.", "warning")
return redirect(url_for("index"))
elif action == "save":
# User confirmed they saved the key
recovery_key = request.form.get("recovery_key")
if recovery_key:
key_hash = hash_recovery_key(recovery_key)
set_recovery_key_hash(key_hash)
flash("Setup complete. Recovery key saved.", "success")
return redirect(url_for("index"))
# Generate a new key to show
recovery_key = generate_recovery_key()
# Generate QR code as base64
try:
qr_bytes = generate_recovery_qr(recovery_key)
qr_base64 = base64.b64encode(qr_bytes).decode("utf-8")
except ImportError:
qr_base64 = None
return render_template(
"setup_recovery.html",
recovery_key=recovery_key,
qr_base64=qr_base64,
)
@app.route("/recover", methods=["GET", "POST"])
def recover():
"""Password recovery page - reset password using recovery key."""
# Don't show if no recovery key configured
if not get_recovery_key_hash():
flash("No recovery key configured for this instance", "error")
return redirect(url_for("login"))
if request.method == "POST":
recovery_key = request.form.get("recovery_key", "").strip()
new_password = request.form.get("new_password", "")
new_password_confirm = request.form.get("new_password_confirm", "")
if not recovery_key:
flash("Please enter your recovery key", "error")
elif new_password != new_password_confirm:
flash("Passwords do not match", "error")
elif len(new_password) < 8:
flash("Password must be at least 8 characters", "error")
else:
success, message = verify_and_reset_admin_password(recovery_key, new_password)
if success:
flash("Password reset successfully. Please login.", "success")
return redirect(url_for("login"))
else:
flash(message, "error")
return render_template("recover.html")
@app.route("/account/recovery/regenerate", methods=["GET", "POST"])
@login_required
@admin_required
def regenerate_recovery():
"""Generate a new recovery key (replaces existing one)."""
from stegasoo.recovery import generate_recovery_key, hash_recovery_key, generate_recovery_qr
import base64
if request.method == "POST":
action = request.form.get("action")
if action == "cancel":
flash("Recovery key generation cancelled", "warning")
return redirect(url_for("account"))
elif action == "save":
# User confirmed they saved the key
recovery_key = request.form.get("recovery_key")
if recovery_key:
key_hash = hash_recovery_key(recovery_key)
set_recovery_key_hash(key_hash)
flash("New recovery key saved successfully", "success")
return redirect(url_for("account"))
# Generate a new key to show
recovery_key = generate_recovery_key()
# Generate QR code as base64
try:
qr_bytes = generate_recovery_qr(recovery_key)
qr_base64 = base64.b64encode(qr_bytes).decode("utf-8")
except ImportError:
qr_base64 = None
return render_template(
"regenerate_recovery.html",
recovery_key=recovery_key,
qr_base64=qr_base64,
has_existing=has_recovery_key(),
)
@app.route("/account/recovery/disable", methods=["POST"])
@login_required
@admin_required
def disable_recovery():
"""Disable recovery key (no password reset possible)."""
if clear_recovery_key():
flash("Recovery key disabled. Password reset is no longer possible.", "warning")
else:
flash("No recovery key was configured", "error")
return redirect(url_for("account"))
@app.route("/account/recovery/stego-backup", methods=["POST"])
@login_required
@admin_required
def create_stego_backup():
"""Create stego backup - hide recovery key in an image."""
from stegasoo.recovery import create_stego_backup as make_backup
recovery_key = request.form.get("recovery_key", "")
if not recovery_key:
flash("No recovery key provided", "error")
return redirect(url_for("regenerate_recovery"))
if "carrier_image" not in request.files:
flash("No image uploaded", "error")
return redirect(url_for("regenerate_recovery"))
carrier_file = request.files["carrier_image"]
if not carrier_file.filename:
flash("No image selected", "error")
return redirect(url_for("regenerate_recovery"))
try:
carrier_data = carrier_file.read()
stego_data = make_backup(recovery_key, carrier_data)
# Return as downloadable PNG
buffer = io.BytesIO(stego_data)
return send_file(
buffer,
mimetype="image/png",
as_attachment=True,
download_name="stegasoo-recovery-backup.png",
)
except ValueError as e:
flash(str(e), "error")
return redirect(url_for("regenerate_recovery"))
@app.route("/recover/stego", methods=["POST"])
def recover_from_stego():
"""Extract recovery key from stego backup image."""
from stegasoo.recovery import extract_stego_backup
if "stego_image" not in request.files or "reference_image" not in request.files:
flash("Both stego image and reference image are required", "error")
return redirect(url_for("recover"))
stego_file = request.files["stego_image"]
reference_file = request.files["reference_image"]
if not stego_file.filename or not reference_file.filename:
flash("Both images must be selected", "error")
return redirect(url_for("recover"))
try:
stego_data = stego_file.read()
reference_data = reference_file.read()
extracted_key = extract_stego_backup(stego_data, reference_data)
if extracted_key:
# Return the key to pre-fill the recovery form
return render_template("recover.html", prefilled_key=extracted_key)
else:
flash("Could not extract recovery key. Check images are correct.", "error")
return redirect(url_for("recover"))
except Exception as e:
flash(f"Extraction failed: {e}", "error")
return redirect(url_for("recover"))
@app.route("/account", methods=["GET", "POST"]) @app.route("/account", methods=["GET", "POST"])
@login_required @login_required
def account(): def account():
@@ -1641,6 +1851,7 @@ def account():
username=current_user.username, username=current_user.username,
user=current_user, user=current_user,
is_admin=current_user.is_admin, is_admin=current_user.is_admin,
has_recovery=has_recovery_key(),
channel_keys=channel_keys, channel_keys=channel_keys,
max_channel_keys=MAX_CHANNEL_KEYS, max_channel_keys=MAX_CHANNEL_KEYS,
can_save_key=can_save_channel_key(current_user.id), can_save_key=can_save_channel_key(current_user.id),

View File

@@ -94,8 +94,9 @@ def init_db():
# Fresh install - create new schema # Fresh install - create new schema
_create_schema(db) _create_schema(db)
else: else:
# Existing install - check for new tables (channel_keys migration) # Existing install - check for new tables (migrations)
_ensure_channel_keys_table(db) _ensure_channel_keys_table(db)
_ensure_app_settings_table(db)
def _create_schema(db: sqlite3.Connection): def _create_schema(db: sqlite3.Connection):
@@ -125,6 +126,15 @@ def _create_schema(db: sqlite3.Connection):
); );
CREATE INDEX IF NOT EXISTS idx_channel_keys_user ON user_channel_keys(user_id); CREATE INDEX IF NOT EXISTS idx_channel_keys_user ON user_channel_keys(user_id);
-- App-level settings (v4.1.0)
-- Stores recovery key hash and other instance-wide settings
CREATE TABLE IF NOT EXISTS app_settings (
key TEXT PRIMARY KEY,
value TEXT NOT NULL,
created_at TEXT DEFAULT CURRENT_TIMESTAMP,
updated_at TEXT DEFAULT CURRENT_TIMESTAMP
);
""") """)
db.commit() db.commit()
@@ -177,6 +187,131 @@ def _ensure_channel_keys_table(db: sqlite3.Connection):
db.commit() db.commit()
def _ensure_app_settings_table(db: sqlite3.Connection):
"""Ensure app_settings table exists (v4.1.0 migration)."""
cursor = db.execute(
"SELECT name FROM sqlite_master WHERE type='table' AND name='app_settings'"
)
if cursor.fetchone() is None:
db.executescript("""
CREATE TABLE IF NOT EXISTS app_settings (
key TEXT PRIMARY KEY,
value TEXT NOT NULL,
created_at TEXT DEFAULT CURRENT_TIMESTAMP,
updated_at TEXT DEFAULT CURRENT_TIMESTAMP
);
""")
db.commit()
# =============================================================================
# App Settings (v4.1.0)
# =============================================================================
def get_app_setting(key: str) -> str | None:
"""Get an app-level setting value."""
db = get_db()
row = db.execute(
"SELECT value FROM app_settings WHERE key = ?", (key,)
).fetchone()
return row["value"] if row else None
def set_app_setting(key: str, value: str) -> None:
"""Set an app-level setting value."""
db = get_db()
db.execute(
"""
INSERT INTO app_settings (key, value)
VALUES (?, ?)
ON CONFLICT(key) DO UPDATE SET value = ?, updated_at = CURRENT_TIMESTAMP
""",
(key, value, value),
)
db.commit()
def delete_app_setting(key: str) -> bool:
"""Delete an app-level setting. Returns True if deleted."""
db = get_db()
cursor = db.execute("DELETE FROM app_settings WHERE key = ?", (key,))
db.commit()
return cursor.rowcount > 0
# =============================================================================
# Recovery Key Management (v4.1.0)
# =============================================================================
# Setting key for recovery hash
RECOVERY_KEY_SETTING = "recovery_key_hash"
def has_recovery_key() -> bool:
"""Check if a recovery key has been configured."""
return get_app_setting(RECOVERY_KEY_SETTING) is not None
def get_recovery_key_hash() -> str | None:
"""Get the stored recovery key hash."""
return get_app_setting(RECOVERY_KEY_SETTING)
def set_recovery_key_hash(key_hash: str) -> None:
"""Store a recovery key hash."""
set_app_setting(RECOVERY_KEY_SETTING, key_hash)
def clear_recovery_key() -> bool:
"""Remove the recovery key. Returns True if removed."""
return delete_app_setting(RECOVERY_KEY_SETTING)
def verify_and_reset_admin_password(recovery_key: str, new_password: str) -> tuple[bool, str]:
"""
Verify recovery key and reset the first admin's password.
Args:
recovery_key: User-provided recovery key
new_password: New password to set
Returns:
(success, message) tuple
"""
from stegasoo.recovery import verify_recovery_key
stored_hash = get_recovery_key_hash()
if not stored_hash:
return False, "No recovery key configured for this instance"
if not verify_recovery_key(recovery_key, stored_hash):
return False, "Invalid recovery key"
# Find first admin user
db = get_db()
admin = db.execute(
"SELECT id, username FROM users WHERE role = 'admin' ORDER BY id LIMIT 1"
).fetchone()
if not admin:
return False, "No admin user found"
# Reset password
new_hash = ph.hash(new_password)
db.execute(
"UPDATE users SET password_hash = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?",
(new_hash, admin["id"]),
)
db.commit()
# Invalidate all sessions for this user
invalidate_user_sessions(admin["id"])
return True, f"Password reset for '{admin['username']}'"
# ============================================================================= # =============================================================================
# User Queries # User Queries
# ============================================================================= # =============================================================================

View File

@@ -25,6 +25,45 @@
<i class="bi bi-people me-2"></i>Manage Users <i class="bi bi-people me-2"></i>Manage Users
</a> </a>
</div> </div>
<!-- Recovery Key Management (Admin only) -->
<div class="card bg-dark mb-4">
<div class="card-body py-3">
<div class="d-flex justify-content-between align-items-center">
<div>
<i class="bi bi-shield-lock me-2"></i>
<strong>Recovery Key</strong>
{% if has_recovery %}
<span class="badge bg-success ms-2">Configured</span>
{% else %}
<span class="badge bg-secondary ms-2">Not Set</span>
{% endif %}
</div>
<div class="btn-group btn-group-sm">
<a href="{{ url_for('regenerate_recovery') }}" class="btn btn-outline-warning"
onclick="return confirm('Generate a new recovery key? This will invalidate any existing key.')">
<i class="bi bi-arrow-repeat me-1"></i>
{{ 'Regenerate' if has_recovery else 'Generate' }}
</a>
{% if has_recovery %}
<form method="POST" action="{{ url_for('disable_recovery') }}" style="display:inline;">
<button type="submit" class="btn btn-outline-danger"
onclick="return confirm('Disable recovery? If you forget your password, you will NOT be able to recover your account.')">
<i class="bi bi-x-lg"></i>
</button>
</form>
{% endif %}
</div>
</div>
<small class="text-muted d-block mt-2">
{% if has_recovery %}
Allows password reset if you're locked out.
{% else %}
No recovery option - most secure, but no password reset possible.
{% endif %}
</small>
</div>
</div>
{% endif %} {% endif %}
<h6 class="text-muted mb-3">Change Password</h6> <h6 class="text-muted mb-3">Change Password</h6>

View File

@@ -72,7 +72,7 @@
<div class="toast-container position-fixed end-0 p-3" style="z-index: 1100; top: 70px;"> <div class="toast-container position-fixed end-0 p-3" style="z-index: 1100; top: 70px;">
{% with messages = get_flashed_messages(with_categories=true) %} {% with messages = get_flashed_messages(with_categories=true) %}
{% for category, message in messages %} {% for category, message in messages %}
<div class="toast show align-items-center text-bg-{{ 'danger' if category == 'error' else ('warning' if category == 'warning' else 'success') }} border-0" role="alert" data-bs-autohide="true" data-bs-delay="4000"> <div class="toast show align-items-center text-bg-{{ 'danger' if category == 'error' else ('warning' if category == 'warning' else 'success') }} border-0 fade" role="alert" data-bs-autohide="true" data-bs-delay="20000">
<div class="d-flex"> <div class="d-flex">
<div class="toast-body"> <div class="toast-body">
<i class="bi bi-{{ 'exclamation-triangle' if category == 'error' else ('exclamation-circle' if category == 'warning' else 'check-circle') }} me-2"></i> <i class="bi bi-{{ 'exclamation-triangle' if category == 'error' else ('exclamation-circle' if category == 'warning' else 'check-circle') }} me-2"></i>

View File

@@ -38,6 +38,12 @@
<i class="bi bi-box-arrow-in-right me-2"></i>Login <i class="bi bi-box-arrow-in-right me-2"></i>Login
</button> </button>
</form> </form>
<div class="text-center mt-3">
<a href="{{ url_for('recover') }}" class="text-muted small">
<i class="bi bi-key me-1"></i> Forgot password?
</a>
</div>
</div> </div>
</div> </div>
</div> </div>

View File

@@ -0,0 +1,129 @@
{% extends "base.html" %}
{% block title %}Password Recovery - Stegasoo{% endblock %}
{% block content %}
<div class="row justify-content-center">
<div class="col-md-6 col-lg-5">
<div class="card">
<div class="card-header text-center">
<i class="bi bi-shield-lock fs-1 d-block mb-2"></i>
<h5 class="mb-0">Password Recovery</h5>
</div>
<div class="card-body">
<p class="text-muted text-center mb-4">
Enter your recovery key to reset your admin password.
</p>
<!-- Extract from Stego Backup -->
<div class="accordion mb-3" id="stegoAccordion">
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed py-2" type="button"
data-bs-toggle="collapse" data-bs-target="#stegoExtract">
<i class="bi bi-incognito me-2"></i>
<small>Extract from stego backup</small>
</button>
</h2>
<div id="stegoExtract" class="accordion-collapse collapse"
data-bs-parent="#stegoAccordion">
<div class="accordion-body py-2">
<form method="POST" action="{{ url_for('recover_from_stego') }}"
enctype="multipart/form-data">
<div class="mb-2">
<label class="form-label small mb-1">Stego Image</label>
<input type="file" name="stego_image"
class="form-control form-control-sm"
accept="image/*" required>
</div>
<div class="mb-2">
<label class="form-label small mb-1">Original Reference</label>
<input type="file" name="reference_image"
class="form-control form-control-sm"
accept="image/*" required>
</div>
<button type="submit" class="btn btn-sm btn-outline-primary w-100">
<i class="bi bi-unlock me-1"></i> Extract Key
</button>
</form>
</div>
</div>
</div>
</div>
<form method="POST" action="{{ url_for('recover') }}" id="recoverForm">
<!-- Recovery Key Input -->
<div class="mb-3">
<label class="form-label">
<i class="bi bi-key-fill me-1"></i> Recovery Key
</label>
<textarea name="recovery_key" class="form-control font-monospace"
rows="2" required
placeholder="XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX"
style="font-size: 0.9em;">{{ prefilled_key or '' }}</textarea>
<div class="form-text">
Paste your full recovery key (with or without dashes)
</div>
</div>
<hr>
<!-- New Password -->
<div class="mb-3">
<label class="form-label">
<i class="bi bi-lock me-1"></i> New Password
</label>
<div class="input-group">
<input type="password" name="new_password" class="form-control"
id="passwordInput" required minlength="8">
<button class="btn btn-outline-secondary" type="button"
onclick="togglePassword('passwordInput', this)">
<i class="bi bi-eye"></i>
</button>
</div>
<div class="form-text">Minimum 8 characters</div>
</div>
<!-- Confirm Password -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-lock-fill me-1"></i> Confirm Password
</label>
<div class="input-group">
<input type="password" name="new_password_confirm" class="form-control"
id="passwordConfirmInput" required minlength="8">
<button class="btn btn-outline-secondary" type="button"
onclick="togglePassword('passwordConfirmInput', this)">
<i class="bi bi-eye"></i>
</button>
</div>
</div>
<button type="submit" class="btn btn-primary w-100">
<i class="bi bi-check-lg me-2"></i>Reset Password
</button>
</form>
<div class="text-center mt-3">
<a href="{{ url_for('login') }}" class="text-muted small">
<i class="bi bi-arrow-left me-1"></i> Back to Login
</a>
</div>
</div>
</div>
<div class="alert alert-warning mt-4 small">
<i class="bi bi-exclamation-triangle me-2"></i>
<strong>Note:</strong> This will reset the admin password. If you don't have a valid recovery key,
you'll need to delete the database and reconfigure Stegasoo.
</div>
</div>
</div>
{% endblock %}
{% block scripts %}
<script src="{{ url_for('static', filename='js/auth.js') }}"></script>
<script>
StegasooAuth.initPasswordConfirmation('recoverForm', 'passwordInput', 'passwordConfirmInput');
</script>
{% endblock %}

View File

@@ -0,0 +1,183 @@
{% extends "base.html" %}
{% block title %}Regenerate Recovery Key - Stegasoo{% endblock %}
{% block content %}
<div class="row justify-content-center">
<div class="col-md-8 col-lg-6">
<div class="card">
<div class="card-header text-center">
<i class="bi bi-arrow-repeat fs-1 d-block mb-2"></i>
<h5 class="mb-0">{{ 'Regenerate' if has_existing else 'Generate' }} Recovery Key</h5>
</div>
<div class="card-body">
{% if has_existing %}
<!-- Warning for existing key -->
<div class="alert alert-warning">
<i class="bi bi-exclamation-triangle me-2"></i>
<strong>Warning:</strong> Your existing recovery key will be invalidated.
Make sure to save this new key before continuing.
</div>
{% else %}
<!-- Info for first-time setup -->
<div class="alert alert-info">
<i class="bi bi-info-circle me-2"></i>
<strong>What is a recovery key?</strong><br>
If you forget your admin password, this key is the ONLY way to reset it.
</div>
{% endif %}
<!-- Recovery Key Display -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-key-fill me-1"></i> Your New Recovery Key
</label>
<div class="input-group">
<input type="text" class="form-control font-monospace text-center"
id="recoveryKey" value="{{ recovery_key }}" readonly
style="font-size: 1.1em; letter-spacing: 0.5px;">
<button class="btn btn-outline-secondary" type="button"
onclick="copyToClipboard()" title="Copy to clipboard">
<i class="bi bi-clipboard" id="copyIcon"></i>
</button>
</div>
</div>
<!-- QR Code (if available) -->
{% if qr_base64 %}
<div class="mb-4 text-center">
<label class="form-label d-block">
<i class="bi bi-qr-code me-1"></i> QR Code
</label>
<img src="data:image/png;base64,{{ qr_base64 }}"
alt="Recovery Key QR Code" class="img-fluid border rounded"
style="max-width: 200px;" id="qrImage">
</div>
{% endif %}
<!-- Download Options -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-download me-1"></i> Download Options
</label>
<div class="d-flex gap-2 flex-wrap">
<button class="btn btn-outline-primary btn-sm" onclick="downloadTextFile()">
<i class="bi bi-file-text me-1"></i> Text File
</button>
{% if qr_base64 %}
<button class="btn btn-outline-primary btn-sm" onclick="downloadQRImage()">
<i class="bi bi-image me-1"></i> QR Image
</button>
{% endif %}
</div>
</div>
<!-- Stego Backup Option -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-incognito me-1"></i> Hide in Image
</label>
<form method="POST" action="{{ url_for('create_stego_backup') }}"
enctype="multipart/form-data" class="d-flex gap-2 align-items-end">
<input type="hidden" name="recovery_key" value="{{ recovery_key }}">
<div class="flex-grow-1">
<input type="file" name="carrier_image" class="form-control form-control-sm"
accept="image/jpeg,image/png" required>
<div class="form-text">JPG/PNG, 50KB-2MB</div>
</div>
<button type="submit" class="btn btn-outline-secondary btn-sm">
<i class="bi bi-download me-1"></i> Stego
</button>
</form>
</div>
<hr>
<!-- Confirmation Form -->
<form method="POST" id="recoveryForm">
<input type="hidden" name="recovery_key" value="{{ recovery_key }}">
<!-- Confirm checkbox -->
<div class="form-check mb-3">
<input class="form-check-input" type="checkbox" id="confirmSaved"
onchange="updateButtons()">
<label class="form-check-label" for="confirmSaved">
I have saved my recovery key in a secure location
</label>
</div>
<div class="d-flex gap-2 justify-content-between">
<!-- Cancel button -->
<button type="submit" name="action" value="cancel"
class="btn btn-outline-secondary">
<i class="bi bi-x-lg me-1"></i> Cancel
</button>
<!-- Save button -->
<button type="submit" name="action" value="save"
class="btn btn-primary" id="saveBtn" disabled>
<i class="bi bi-check-lg me-1"></i> Save New Key
</button>
</div>
</form>
</div>
</div>
</div>
</div>
{% endblock %}
{% block scripts %}
<script>
// Copy recovery key to clipboard
function copyToClipboard() {
const keyInput = document.getElementById('recoveryKey');
navigator.clipboard.writeText(keyInput.value).then(() => {
const icon = document.getElementById('copyIcon');
icon.className = 'bi bi-clipboard-check';
setTimeout(() => { icon.className = 'bi bi-clipboard'; }, 2000);
});
}
// Download as text file
function downloadTextFile() {
const key = document.getElementById('recoveryKey').value;
const content = `Stegasoo Recovery Key
=====================
${key}
IMPORTANT:
- Keep this file in a secure location
- Anyone with this key can reset admin passwords
- Do not store with your password
Generated: ${new Date().toISOString()}
`;
const blob = new Blob([content], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = 'stegasoo-recovery-key.txt';
a.click();
URL.revokeObjectURL(url);
}
// Download QR as image
function downloadQRImage() {
const img = document.getElementById('qrImage');
if (!img) return;
const a = document.createElement('a');
a.href = img.src;
a.download = 'stegasoo-recovery-qr.png';
a.click();
}
// Enable save button when checkbox is checked
function updateButtons() {
const checkbox = document.getElementById('confirmSaved');
const saveBtn = document.getElementById('saveBtn');
saveBtn.disabled = !checkbox.checked;
}
</script>
{% endblock %}

View File

@@ -0,0 +1,176 @@
{% extends "base.html" %}
{% block title %}Recovery Key Setup - Stegasoo{% endblock %}
{% block content %}
<div class="row justify-content-center">
<div class="col-md-8 col-lg-6">
<div class="card">
<div class="card-header text-center">
<i class="bi bi-shield-lock fs-1 d-block mb-2"></i>
<h5 class="mb-0">Recovery Key Setup</h5>
<small class="text-muted">Step 2 of 2</small>
</div>
<div class="card-body">
<!-- Explanation -->
<div class="alert alert-info">
<i class="bi bi-info-circle me-2"></i>
<strong>What is a recovery key?</strong><br>
If you forget your admin password, this key is the ONLY way to reset it.
Save it somewhere safe - it will not be shown again.
</div>
<!-- Recovery Key Display -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-key-fill me-1"></i> Your Recovery Key
</label>
<div class="input-group">
<input type="text" class="form-control font-monospace text-center"
id="recoveryKey" value="{{ recovery_key }}" readonly
style="font-size: 1.1em; letter-spacing: 0.5px;">
<button class="btn btn-outline-secondary" type="button"
onclick="copyToClipboard()" title="Copy to clipboard">
<i class="bi bi-clipboard" id="copyIcon"></i>
</button>
</div>
</div>
<!-- QR Code (if available) -->
{% if qr_base64 %}
<div class="mb-4 text-center">
<label class="form-label d-block">
<i class="bi bi-qr-code me-1"></i> QR Code
</label>
<img src="data:image/png;base64,{{ qr_base64 }}"
alt="Recovery Key QR Code" class="img-fluid border rounded"
style="max-width: 200px;" id="qrImage">
<div class="mt-2">
<small class="text-muted">Scan with your phone's camera app</small>
</div>
</div>
{% endif %}
<!-- Download Options -->
<div class="mb-4">
<label class="form-label">
<i class="bi bi-download me-1"></i> Download Options
</label>
<div class="d-flex gap-2 flex-wrap">
<button class="btn btn-outline-primary btn-sm" onclick="downloadTextFile()">
<i class="bi bi-file-text me-1"></i> Text File
</button>
{% if qr_base64 %}
<button class="btn btn-outline-primary btn-sm" onclick="downloadQRImage()">
<i class="bi bi-image me-1"></i> QR Image
</button>
{% endif %}
</div>
</div>
<hr>
<!-- Confirmation Form -->
<form method="POST" id="recoveryForm">
<input type="hidden" name="recovery_key" value="{{ recovery_key }}">
<!-- Confirm checkbox -->
<div class="form-check mb-3">
<input class="form-check-input" type="checkbox" id="confirmSaved"
onchange="updateButtons()">
<label class="form-check-label" for="confirmSaved">
I have saved my recovery key in a secure location
</label>
</div>
<div class="d-flex gap-2 justify-content-between">
<!-- Skip button (no recovery) -->
<button type="submit" name="action" value="skip"
class="btn btn-outline-secondary"
onclick="return confirm('Are you sure? Without a recovery key, there is NO way to reset your password if you forget it.')">
<i class="bi bi-skip-forward me-1"></i> Skip (No Recovery)
</button>
<!-- Save button (with key) -->
<button type="submit" name="action" value="save"
class="btn btn-primary" id="saveBtn" disabled>
<i class="bi bi-check-lg me-1"></i> Continue
</button>
</div>
</form>
</div>
</div>
<!-- Security Notes -->
<div class="card mt-3">
<div class="card-header">
<i class="bi bi-shield-check me-2"></i>Security Notes
</div>
<div class="card-body small">
<ul class="mb-0">
<li>The recovery key is <strong>not stored</strong> - only a hash is saved</li>
<li>Keep it separate from your password (different location)</li>
<li>Anyone with this key can reset admin passwords</li>
<li>If you lose it and forget your password, you must recreate the database</li>
</ul>
</div>
</div>
</div>
</div>
{% endblock %}
{% block scripts %}
<script>
// Copy recovery key to clipboard
function copyToClipboard() {
const keyInput = document.getElementById('recoveryKey');
navigator.clipboard.writeText(keyInput.value).then(() => {
const icon = document.getElementById('copyIcon');
icon.className = 'bi bi-clipboard-check';
setTimeout(() => { icon.className = 'bi bi-clipboard'; }, 2000);
});
}
// Download as text file
function downloadTextFile() {
const key = document.getElementById('recoveryKey').value;
const content = `Stegasoo Recovery Key
=====================
${key}
IMPORTANT:
- Keep this file in a secure location
- Anyone with this key can reset admin passwords
- Do not store with your password
Generated: ${new Date().toISOString()}
`;
const blob = new Blob([content], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = 'stegasoo-recovery-key.txt';
a.click();
URL.revokeObjectURL(url);
}
// Download QR as image
function downloadQRImage() {
const img = document.getElementById('qrImage');
if (!img) return;
const a = document.createElement('a');
a.href = img.src;
a.download = 'stegasoo-recovery-qr.png';
a.click();
}
// Enable save button when checkbox is checked
function updateButtons() {
const checkbox = document.getElementById('confirmSaved');
const saveBtn = document.getElementById('saveBtn');
saveBtn.disabled = !checkbox.checked;
}
</script>
{% endblock %}

View File

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
[project] [project]
name = "stegasoo" name = "stegasoo"
version = "4.0.1" version = "4.1.0"
description = "Secure steganography with hybrid photo + passphrase + PIN authentication" description = "Secure steganography with hybrid photo + passphrase + PIN authentication"
readme = "README.md" readme = "README.md"
license = "MIT" license = "MIT"

View File

@@ -964,6 +964,162 @@ def tools_exif(image, clear, set_fields, output, as_json):
raise click.UsageError(str(e)) raise click.UsageError(str(e))
# =============================================================================
# ADMIN COMMANDS (Web UI administration)
# =============================================================================
@cli.group()
@click.pass_context
def admin(ctx):
"""Web UI administration commands."""
pass
@admin.command("recover")
@click.option(
"--db", "db_path",
type=click.Path(exists=True),
help="Path to stegasoo.db (default: frontends/web/instance/stegasoo.db)"
)
@click.option("--password", prompt=True, hide_input=True, confirmation_prompt=True,
help="New admin password")
def admin_recover(db_path, password):
"""Reset admin password using recovery key.
Allows password reset for Web UI admin account when locked out.
Requires the recovery key that was saved during setup.
Example:
stegasoo admin recover --db /path/to/stegasoo.db
"""
import sqlite3
from argon2 import PasswordHasher
from .recovery import verify_recovery_key
# Try default paths if not specified
if not db_path:
candidates = [
Path("frontends/web/instance/stegasoo.db"),
Path("instance/stegasoo.db"),
Path("/app/instance/stegasoo.db"),
]
for candidate in candidates:
if candidate.exists():
db_path = str(candidate)
break
if not db_path or not Path(db_path).exists():
raise click.UsageError(
"Database not found. Use --db to specify path to stegasoo.db"
)
click.echo(f"Database: {db_path}")
# Connect and check for recovery key
db = sqlite3.connect(db_path)
db.row_factory = sqlite3.Row
# Get recovery key hash from app_settings
cursor = db.execute(
"SELECT value FROM app_settings WHERE key = 'recovery_key_hash'"
)
row = cursor.fetchone()
if not row:
db.close()
raise click.ClickException(
"No recovery key configured for this instance. "
"Password reset is not possible."
)
stored_hash = row["value"]
# Prompt for recovery key
recovery_key = click.prompt(
"Enter your recovery key",
hide_input=False, # Recovery keys are meant to be visible
)
# Verify recovery key
if not verify_recovery_key(recovery_key, stored_hash):
db.close()
raise click.ClickException("Invalid recovery key")
# Validate password
if len(password) < 8:
db.close()
raise click.UsageError("Password must be at least 8 characters")
# Hash new password with same settings as web UI
ph = PasswordHasher(
time_cost=3,
memory_cost=65536, # 64MB
parallelism=4,
hash_len=32,
salt_len=16,
)
new_hash = ph.hash(password)
# Find and update admin user
admin = db.execute(
"SELECT id, username FROM users WHERE role = 'admin' ORDER BY id LIMIT 1"
).fetchone()
if not admin:
db.close()
raise click.ClickException("No admin user found in database")
db.execute(
"UPDATE users SET password_hash = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?",
(new_hash, admin["id"]),
)
db.commit()
db.close()
click.echo(f"\nPassword reset successfully for admin '{admin['username']}'")
click.echo("You can now login to the Web UI with your new password.")
@admin.command("generate-key")
@click.option("--qr", "show_qr", is_flag=True, help="Show QR code in terminal (if supported)")
def admin_generate_key(show_qr):
"""Generate a new recovery key (for reference only).
This generates a new random recovery key and displays it.
To actually set the recovery key, use the Web UI.
Example:
stegasoo admin generate-key
stegasoo admin generate-key --qr
"""
from .recovery import generate_recovery_key, get_recovery_fingerprint
key = generate_recovery_key()
click.echo("\nNew Recovery Key:")
click.echo("" * 50)
click.echo(f" {key}")
click.echo("" * 50)
click.echo(f"Fingerprint: {get_recovery_fingerprint(key)}")
if show_qr:
try:
import qrcode
qr = qrcode.QRCode(box_size=1, border=1)
qr.add_data(key)
qr.make()
click.echo("\nQR Code:")
qr.print_ascii(invert=True)
except ImportError:
click.echo("\n(qrcode library not installed for terminal QR)")
click.echo("\nNote: Save this key securely. To set it in the Web UI,")
click.echo("go to Account > Recovery Key > Regenerate")
def main(): def main():
"""Entry point for CLI.""" """Entry point for CLI."""
cli(obj={}) cli(obj={})

View File

@@ -25,7 +25,7 @@ from pathlib import Path
# VERSION # VERSION
# ============================================================================ # ============================================================================
__version__ = "4.0.2" __version__ = "4.1.0"
# ============================================================================ # ============================================================================
# FILE FORMAT # FILE FORMAT
@@ -234,6 +234,14 @@ DCT_MAGIC_HEADER = b"\x89DCT" # Magic header for DCT mode
DCT_FORMAT_VERSION = 1 DCT_FORMAT_VERSION = 1
DCT_STEP_SIZE = 8 # QIM quantization step DCT_STEP_SIZE = 8 # QIM quantization step
# Recovery key obfuscation - FIXED value for admin recovery QR codes
# SHA256("\x89ST3\x89DCT") - hardcoded so it never changes even if headers are added
# Used to XOR recovery keys in QR codes so they scan as gibberish
RECOVERY_OBFUSCATION_KEY = bytes.fromhex(
"d6c70bce27780db942562550e9fe1459"
"9dfdb8421f5acc79696b05db4e7afbd2"
) # 32 bytes
# Valid embedding modes # Valid embedding modes
VALID_EMBED_MODES = {EMBED_MODE_LSB, EMBED_MODE_DCT} VALID_EMBED_MODES = {EMBED_MODE_LSB, EMBED_MODE_DCT}

453
src/stegasoo/recovery.py Normal file
View File

@@ -0,0 +1,453 @@
"""
Stegasoo Admin Recovery Module (v4.1.0)
Generates and manages recovery keys for admin password reset.
Recovery keys use the same format as channel keys (32 alphanumeric chars
with dashes) but serve a different purpose - they allow resetting the
admin password when locked out.
Security model:
- Recovery key is generated once during setup
- Only the hash is stored in the database
- The actual key is shown once and must be saved by the user
- Key can reset any admin account's password
- No recovery key = no password reset possible (most secure)
Usage:
# During setup - generate and show to user
key = generate_recovery_key()
key_hash = hash_recovery_key(key)
# Store key_hash in database, show key to user
# During recovery - verify user's key
if verify_recovery_key(user_input, stored_hash):
# Allow password reset
"""
import base64
import hashlib
import secrets
from io import BytesIO
from .constants import RECOVERY_OBFUSCATION_KEY
from .debug import debug
def _xor_bytes(data: bytes, key: bytes) -> bytes:
"""XOR data with repeating key."""
return bytes(b ^ key[i % len(key)] for i, b in enumerate(data))
def obfuscate_key(key: str) -> str:
"""
Obfuscate a recovery key for QR encoding.
XORs the key with magic header hash and base64 encodes.
Result looks like random gibberish when scanned.
Args:
key: Plain recovery key (formatted or normalized)
Returns:
Obfuscated string prefixed with "STEGO:" marker
"""
normalized = normalize_recovery_key(key)
key_bytes = normalized.encode("utf-8")
xored = _xor_bytes(key_bytes, RECOVERY_OBFUSCATION_KEY)
encoded = base64.b64encode(xored).decode("ascii")
return f"STEGO:{encoded}"
def deobfuscate_key(obfuscated: str) -> str | None:
"""
Deobfuscate a recovery key from QR data.
Reverses the obfuscation process.
Args:
obfuscated: Obfuscated string from QR scan
Returns:
Formatted recovery key, or None if invalid
"""
if not obfuscated.startswith("STEGO:"):
# Not obfuscated - try as plain key
try:
return format_recovery_key(obfuscated)
except ValueError:
return None
try:
encoded = obfuscated[6:] # Strip "STEGO:" prefix
xored = base64.b64decode(encoded)
key_bytes = _xor_bytes(xored, RECOVERY_OBFUSCATION_KEY)
normalized = key_bytes.decode("utf-8")
return format_recovery_key(normalized)
except Exception:
return None
# =============================================================================
# STEGO BACKUP - Hide recovery key in an image using Stegasoo itself
# =============================================================================
# Fixed credentials for recovery key stego (internal, not user-facing)
# These are hardcoded - security is in the obscurity of the stego image
_RECOVERY_STEGO_PASSPHRASE = "stegasoo-recovery-v1"
_RECOVERY_STEGO_PIN = "314159" # Pi digits - fixed, not secret
# Size limits for carrier image
STEGO_BACKUP_MIN_SIZE = 50 * 1024 # 50 KB
STEGO_BACKUP_MAX_SIZE = 2 * 1024 * 1024 # 2 MB
def create_stego_backup(
recovery_key: str,
carrier_image: bytes,
) -> bytes:
"""
Hide recovery key in an image using Stegasoo steganography.
Uses the same image as both carrier and reference for simplicity.
Fixed internal passphrase, no PIN required - obscurity is the security.
Args:
recovery_key: The recovery key to hide
carrier_image: JPEG image bytes (50KB-2MB, used as carrier AND reference)
Returns:
PNG image with hidden recovery key
Raises:
ValueError: If image size out of range or invalid format
"""
from .encode import encode
# Validate image size
size = len(carrier_image)
if size < STEGO_BACKUP_MIN_SIZE:
raise ValueError(f"Image too small: {size // 1024}KB (min 50KB)")
if size > STEGO_BACKUP_MAX_SIZE:
raise ValueError(f"Image too large: {size // 1024}KB (max 2MB)")
# Normalize key for embedding
formatted_key = format_recovery_key(recovery_key)
# Encode using Stegasoo - same image as carrier and reference
result = encode(
message=formatted_key,
reference_photo=carrier_image, # Same image for simplicity
carrier_image=carrier_image,
passphrase=_RECOVERY_STEGO_PASSPHRASE,
pin=_RECOVERY_STEGO_PIN,
)
debug.print(f"Created stego backup: {len(result.stego_image)} bytes")
return result.stego_image
def extract_stego_backup(
stego_image: bytes,
reference_photo: bytes,
) -> str | None:
"""
Extract recovery key from a stego backup image.
Args:
stego_image: The stego image containing hidden key
reference_photo: Original reference photo (same as was used for carrier)
Returns:
Extracted recovery key (formatted), or None if extraction fails
"""
from .decode import decode
from .exceptions import DecryptionError
try:
result = decode(
stego_image=stego_image,
reference_photo=reference_photo,
passphrase=_RECOVERY_STEGO_PASSPHRASE,
pin=_RECOVERY_STEGO_PIN,
)
# Validate it's a proper recovery key
extracted = result.message or ""
formatted = format_recovery_key(extracted)
debug.print(f"Extracted recovery key from stego: {get_recovery_fingerprint(formatted)}")
return formatted
except (DecryptionError, ValueError) as e:
debug.print(f"Stego backup extraction failed: {e}")
return None
# Recovery key format: same as channel key (32 chars, 8 groups of 4)
RECOVERY_KEY_LENGTH = 32
RECOVERY_KEY_ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
def generate_recovery_key() -> str:
"""
Generate a new random recovery key.
Format: XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX
(32 alphanumeric characters with dashes)
Returns:
Formatted recovery key string
Example:
>>> key = generate_recovery_key()
>>> len(key)
39
>>> key.count('-')
7
"""
# Generate 32 random alphanumeric characters
raw_key = "".join(
secrets.choice(RECOVERY_KEY_ALPHABET)
for _ in range(RECOVERY_KEY_LENGTH)
)
# Format with dashes every 4 characters
formatted = "-".join(
raw_key[i:i + 4]
for i in range(0, RECOVERY_KEY_LENGTH, 4)
)
debug.print(f"Generated recovery key: {formatted[:4]}-••••-...-{formatted[-4:]}")
return formatted
def normalize_recovery_key(key: str) -> str:
"""
Normalize a recovery key for validation/hashing.
Removes dashes, spaces, converts to uppercase.
Args:
key: Raw key input (may have dashes, spaces, mixed case)
Returns:
Normalized key (32 uppercase alphanumeric chars)
Raises:
ValueError: If key has invalid length or characters
Example:
>>> normalize_recovery_key("abcd-1234-efgh-5678-ijkl-9012-mnop-3456")
"ABCD1234EFGH5678IJKL9012MNOP3456"
"""
# Remove dashes and spaces, uppercase
clean = key.replace("-", "").replace(" ", "").upper()
# Validate length
if len(clean) != RECOVERY_KEY_LENGTH:
raise ValueError(
f"Recovery key must be {RECOVERY_KEY_LENGTH} characters "
f"(got {len(clean)})"
)
# Validate characters
if not all(c in RECOVERY_KEY_ALPHABET for c in clean):
raise ValueError(
"Recovery key must contain only letters A-Z and digits 0-9"
)
return clean
def format_recovery_key(key: str) -> str:
"""
Format a recovery key with dashes for display.
Args:
key: Raw or normalized key
Returns:
Formatted key (XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX)
Example:
>>> format_recovery_key("ABCD1234EFGH5678IJKL9012MNOP3456")
"ABCD-1234-EFGH-5678-IJKL-9012-MNOP-3456"
"""
clean = normalize_recovery_key(key)
return "-".join(clean[i:i + 4] for i in range(0, RECOVERY_KEY_LENGTH, 4))
def hash_recovery_key(key: str) -> str:
"""
Hash a recovery key for secure storage.
Uses SHA-256 with a fixed salt prefix. The hash is stored in the
database; the original key is never stored.
Args:
key: Recovery key (formatted or raw)
Returns:
Hex-encoded hash string (64 chars)
Example:
>>> key = "ABCD-1234-EFGH-5678-IJKL-9012-MNOP-3456"
>>> len(hash_recovery_key(key))
64
"""
clean = normalize_recovery_key(key)
# Use a fixed salt prefix for recovery keys
# This differentiates from other hashes in the system
salted = f"stegasoo-recovery-v1:{clean}"
hash_bytes = hashlib.sha256(salted.encode("utf-8")).digest()
hash_hex = hash_bytes.hex()
debug.print(f"Hashed recovery key: {hash_hex[:8]}...")
return hash_hex
def verify_recovery_key(key: str, stored_hash: str) -> bool:
"""
Verify a recovery key against a stored hash.
Args:
key: User-provided recovery key
stored_hash: Hash from database
Returns:
True if key matches, False otherwise
Example:
>>> key = generate_recovery_key()
>>> h = hash_recovery_key(key)
>>> verify_recovery_key(key, h)
True
>>> verify_recovery_key("WRONG-KEY!", h)
False
"""
try:
computed_hash = hash_recovery_key(key)
# Use constant-time comparison to prevent timing attacks
matches = secrets.compare_digest(computed_hash, stored_hash)
debug.print(f"Recovery key verification: {'success' if matches else 'failed'}")
return matches
except ValueError:
# Invalid key format
debug.print("Recovery key verification: invalid format")
return False
def get_recovery_fingerprint(key: str) -> str:
"""
Get a short fingerprint for display (first and last 4 chars).
Args:
key: Recovery key
Returns:
Fingerprint like "ABCD-••••-...-3456"
Example:
>>> get_recovery_fingerprint("ABCD-1234-EFGH-5678-IJKL-9012-MNOP-3456")
"ABCD-••••-••••-••••-••••-••••-••••-3456"
"""
formatted = format_recovery_key(key)
parts = formatted.split("-")
masked = [parts[0]] + ["••••"] * 6 + [parts[-1]]
return "-".join(masked)
def generate_recovery_qr(key: str) -> bytes:
"""
Generate a QR code image for the recovery key.
The key is obfuscated using XOR with Stegasoo's magic headers,
so scanning the QR shows gibberish instead of the actual key.
Args:
key: Recovery key
Returns:
PNG image bytes
Raises:
ImportError: If qrcode library not available
Example:
>>> key = generate_recovery_key()
>>> png_bytes = generate_recovery_qr(key)
>>> len(png_bytes) > 0
True
"""
try:
import qrcode
except ImportError:
raise ImportError("qrcode library required: pip install qrcode[pil]")
# Obfuscate so scanning shows gibberish, not the actual key
obfuscated = obfuscate_key(key)
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_M,
box_size=10,
border=4,
)
qr.add_data(obfuscated)
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")
buffer = BytesIO()
img.save(buffer, format="PNG")
buffer.seek(0)
debug.print(f"Generated recovery QR (obfuscated): {len(buffer.getvalue())} bytes")
return buffer.getvalue()
def extract_key_from_qr(image_data: bytes) -> str | None:
"""
Extract recovery key from a QR code image.
Handles both obfuscated (STEGO:...) and plain key formats.
Args:
image_data: PNG/JPEG image bytes containing QR code
Returns:
Extracted and validated recovery key, or None if not found/invalid
Example:
>>> key = generate_recovery_key()
>>> qr = generate_recovery_qr(key)
>>> extract_key_from_qr(qr) == format_recovery_key(key)
True
"""
try:
from PIL import Image
from pyzbar import pyzbar
except ImportError:
debug.print("pyzbar/PIL not available for QR reading")
return None
try:
img = Image.open(BytesIO(image_data))
decoded = pyzbar.decode(img)
for obj in decoded:
data = obj.data.decode("utf-8").strip()
# Try deobfuscation first (handles both obfuscated and plain)
result = deobfuscate_key(data)
if result:
debug.print(f"Extracted recovery key from QR: {get_recovery_fingerprint(result)}")
return result
debug.print("No valid recovery key found in QR")
return None
except Exception as e:
debug.print(f"QR extraction error: {e}")
return None