468 lines
24 KiB
HTML
468 lines
24 KiB
HTML
{% extends "base.html" %}
|
||
|
||
{% block title %}About - Stegasoo{% endblock %}
|
||
|
||
{% block content %}
|
||
<div class="row justify-content-center">
|
||
<div class="col-lg-10">
|
||
<div class="card mb-4">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-info-circle me-2"></i>About Stegasoo</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<p class="lead">
|
||
Stegasoo is a secure steganography tool that hides encrypted messages and files
|
||
inside ordinary images using multi-factor authentication.
|
||
</p>
|
||
|
||
<h6 class="text-primary mt-4 mb-3"><i class="bi bi-stars me-2"></i>Key Features</h6>
|
||
<div class="row">
|
||
<div class="col-md-6">
|
||
<ul class="list-unstyled">
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Text & File Embedding</strong>
|
||
<br/>Hide messages or any file type (PDF, ZIP, documents)
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Multi-Factor Security</strong>
|
||
<br/>Combines photo + phrase + PIN/RSA key
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>AES-256-GCM Encryption</strong>
|
||
<br/>Military-grade authenticated encryption
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Daily Rotating Phrases</strong>
|
||
<br/>Different passphrase each day of the week
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="col-md-6">
|
||
<ul class="list-unstyled">
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Random Pixel Embedding</strong>
|
||
<br/>Defeats statistical steganalysis
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Format Preservation</strong>
|
||
<br/>Maintains PNG/BMP lossless formats
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Large Capacity</strong>
|
||
<br/>Up to {{ max_payload_kb }} KB payload, 24MP images
|
||
</li>
|
||
<li class="mb-2">
|
||
<i class="bi bi-check-circle text-success me-2"></i>
|
||
<strong>Zero Server Storage</strong>
|
||
<br/>Nothing saved, files auto-expire and are scrubbed from disk.
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="card mb-4">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-shield-lock me-2"></i>How Security Works</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<p>Stegasoo uses <strong>hybrid multi-factor authentication</strong> to derive encryption keys:</p>
|
||
|
||
<div class="row text-center my-4">
|
||
<div class="col-md-3 mb-3">
|
||
<div class="p-3 bg-dark rounded">
|
||
<i class="bi bi-image text-info fs-2 d-block mb-2"></i>
|
||
<strong>Reference Photo</strong>
|
||
<div class="small text-muted mt-1">Something you have</div>
|
||
<div class="small text-success">~80-256 bits</div>
|
||
</div>
|
||
</div>
|
||
<div class="col-md-3 mb-3">
|
||
<div class="p-3 bg-dark rounded">
|
||
<i class="bi bi-chat-quote text-warning fs-2 d-block mb-2"></i>
|
||
<strong>Daily Phrase</strong>
|
||
<div class="small text-muted mt-1">Something you know (rotates)</div>
|
||
<div class="small text-success">~33 bits (3 words)</div>
|
||
</div>
|
||
</div>
|
||
<div class="col-md-3 mb-3">
|
||
<div class="p-3 bg-dark rounded">
|
||
<i class="bi bi-123 text-danger fs-2 d-block mb-2"></i>
|
||
<strong>Static PIN</strong>
|
||
<div class="small text-muted mt-1">Something you know (fixed)</div>
|
||
<div class="small text-success">~20 bits (6 digits)</div>
|
||
</div>
|
||
</div>
|
||
<div class="col-md-3 mb-3">
|
||
<div class="p-3 bg-dark rounded">
|
||
<i class="bi bi-key text-primary fs-2 d-block mb-2"></i>
|
||
<strong>RSA Key</strong>
|
||
<div class="small text-muted mt-1">Something you have (optional)</div>
|
||
<div class="small text-success">~128 bits (2048-bit)</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="alert alert-secondary">
|
||
<i class="bi bi-calculator me-2"></i>
|
||
<strong>Combined entropy:</strong> 130-400+ bits depending on configuration.
|
||
For reference, 128 bits is considered computationally infeasible to brute force.
|
||
</div>
|
||
|
||
<h6 class="mt-4">Key Derivation</h6>
|
||
<p>
|
||
{% if has_argon2 %}
|
||
<span class="badge bg-success me-1"><i class="bi bi-check"></i> Argon2id Available</span>
|
||
Using <strong>Argon2id</strong> with 256MB memory cost — the winner of the Password Hashing Competition
|
||
and current best practice for key derivation.
|
||
{% else %}
|
||
<span class="badge bg-warning text-dark me-1"><i class="bi bi-exclamation-triangle"></i> Argon2 Not Available</span>
|
||
Falling back to <strong>PBKDF2-SHA512</strong> with 600,000 iterations.
|
||
Install <code>argon2-cffi</code> for stronger security.
|
||
{% endif %}
|
||
</p>
|
||
|
||
<h6 class="mt-4">Steganography Technique</h6>
|
||
<p>
|
||
Uses <strong>LSB (Least Significant Bit)</strong> embedding with pseudo-random pixel selection.
|
||
The pixel locations are determined by a key derived from your credentials, making the
|
||
hidden data's location unpredictable without the correct inputs.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="card mb-4">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-file-earmark-binary me-2"></i>File Embedding</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<p>
|
||
<span class="badge bg-info me-1">New in v2.1</span>
|
||
Stegasoo now supports embedding <strong>any file type</strong>, not just text messages.
|
||
</p>
|
||
|
||
<div class="row">
|
||
<div class="col-md-6">
|
||
<h6><i class="bi bi-check2-square text-success me-2"></i>Supported</h6>
|
||
<ul class="small">
|
||
<li>PDF documents</li>
|
||
<li>ZIP/RAR archives</li>
|
||
<li>Office documents (DOCX, XLSX, PPTX)</li>
|
||
<li>Source code files</li>
|
||
<li>Any binary file up to {{ max_payload_kb }} KB</li>
|
||
</ul>
|
||
</div>
|
||
<div class="col-md-6">
|
||
<h6><i class="bi bi-info-circle text-info me-2"></i>How It Works</h6>
|
||
<ul class="small">
|
||
<li>Original filename is preserved</li>
|
||
<li>MIME type is stored for proper handling</li>
|
||
<li>File is encrypted identically to text</li>
|
||
<li>Decoding auto-detects text vs. file</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="alert alert-info small mt-3">
|
||
<i class="bi bi-lightbulb me-2"></i>
|
||
<strong>Tip:</strong> For larger files, compress them first (ZIP) to maximize capacity.
|
||
A 16MP carrier image can hold approximately 6MB of raw data, but we limit payloads
|
||
to {{ max_payload_kb }} KB for reasonable processing times.
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<!-- REST API Card - UPDATED BASED ON CURRENT IMPLEMENTATION -->
|
||
<div class="card mb-4">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-cpu me-2"></i>REST API</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<p>
|
||
<span class="badge bg-success me-1"><i class="bi bi-check-circle"></i> FastAPI</span>
|
||
Stegasoo includes a complete REST API built with FastAPI, featuring automatic documentation,
|
||
type validation, and comprehensive error handling.
|
||
</p>
|
||
|
||
<h6 class="mt-4"><i class="bi bi-layers me-2"></i>API Endpoints</h6>
|
||
<div class="row">
|
||
<div class="col-md-6">
|
||
<ul class="small">
|
||
<li><code>POST /generate</code> – Generate credentials</li>
|
||
<li><code>POST /encode</code> – Encode text message (JSON)</li>
|
||
<li><code>POST /encode/file</code> – Encode binary file (JSON)</li>
|
||
<li><code>POST /encode/multipart</code> – Encode with file uploads</li>
|
||
<li><code>POST /decode</code> – Decode message (JSON)</li>
|
||
</ul>
|
||
</div>
|
||
<div class="col-md-6">
|
||
<ul class="small">
|
||
<li><code>POST /decode/multipart</code> – Decode with file uploads</li>
|
||
<li><code>POST /extract-key-from-qr</code> – Extract RSA key from QR</li>
|
||
<li><code>POST /image/info</code> – Get image capacity</li>
|
||
<li><code>GET /</code> – API status and capabilities</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="alert alert-info small mt-3">
|
||
<i class="bi bi-info-circle me-2"></i>
|
||
<strong>Note:</strong> The <code>/encode/multipart</code> endpoint returns the PNG image directly
|
||
(with headers indicating metadata), while <code>/decode/multipart</code> returns JSON.
|
||
Use <code>--output</code> flag to save responses to files.
|
||
</div>
|
||
|
||
<h6 class="mt-4"><i class="bi bi-file-earmark-code me-2"></i>JSON API Examples</h6>
|
||
<pre class="bg-dark p-3 rounded"><code>// Generate credentials
|
||
curl -X POST "http://localhost:8000/generate" \
|
||
-H "Content-Type: application/json" \
|
||
-d '{"use_pin": true, "use_rsa": false, "pin_length": 6, "words_per_phrase": 3}'
|
||
|
||
// Encode text message (images must be base64 encoded first)
|
||
// First encode images: base64 -w0 photo.jpg > photo.b64
|
||
curl -X POST "http://localhost:8000/encode" \
|
||
-H "Content-Type: application/json" \
|
||
-d '{
|
||
"message": "secret message",
|
||
"reference_photo_base64": "'"$(cat photo.b64)"'",
|
||
"carrier_image_base64": "'"$(cat carrier.b64)"'",
|
||
"day_phrase": "apple forest thunder",
|
||
"pin": "123456"
|
||
}'
|
||
|
||
// Encode file (base64) - encode file first: base64 -w0 document.pdf > doc.b64
|
||
curl -X POST "http://localhost:8000/encode/file" \
|
||
-H "Content-Type: application/json" \
|
||
-d '{
|
||
"file_data_base64": "'"$(cat doc.b64)"'",
|
||
"filename": "document.pdf",
|
||
"reference_photo_base64": "'"$(cat photo.b64)"'",
|
||
"carrier_image_base64": "'"$(cat carrier.b64)"'",
|
||
"day_phrase": "apple forest thunder",
|
||
"pin": "123456"
|
||
}'</code></pre>
|
||
|
||
<h6 class="mt-4"><i class="bi bi-upload me-2"></i>Multipart API Examples</h6>
|
||
<pre class="bg-dark p-3 rounded"><code># Encode text with file uploads
|
||
curl -X POST "http://localhost:8000/encode/multipart" \
|
||
-F "day_phrase=apple forest thunder" \
|
||
-F "pin=123456" \
|
||
-F "reference_photo=@photo.jpg" \
|
||
-F "carrier=@carrier.png" \
|
||
-F "message=secret" \
|
||
--output stego.png
|
||
|
||
# Encode file (no message field when using payload_file)
|
||
curl -X POST "http://localhost:8000/encode/multipart" \
|
||
-F "day_phrase=apple forest thunder" \
|
||
-F "pin=123456" \
|
||
-F "reference_photo=@photo.jpg" \
|
||
-F "carrier=@carrier.png" \
|
||
-F "payload_file=@document.pdf" \
|
||
--output stego.png
|
||
|
||
# Encode with RSA key from QR code (optional)
|
||
curl -X POST "http://localhost:8000/encode/multipart" \
|
||
-F "day_phrase=apple forest thunder" \
|
||
-F "pin=123456" \
|
||
-F "reference_photo=@photo.jpg" \
|
||
-F "carrier=@carrier.png" \
|
||
-F "message=secret" \
|
||
-F "rsa_key_qr=@keyqr.png" \
|
||
--output stego.png
|
||
|
||
# Decode with file uploads (returns JSON)
|
||
curl -X POST "http://localhost:8000/decode/multipart" \
|
||
-F "day_phrase=apple forest thunder" \
|
||
-F "pin=123456" \
|
||
-F "reference_photo=@photo.jpg" \
|
||
-F "stego_image=@stego.png" \
|
||
--output result.json</code></pre>
|
||
|
||
<h6 class="mt-4"><i class="bi bi-qr-code me-2"></i>QR Code Support</h6>
|
||
<p class="small">
|
||
The API can extract RSA keys from QR code images. QR code reading requires
|
||
<code>pyzbar</code> and <code>libzbar</code> system library.
|
||
</p>
|
||
<pre class="bg-dark p-3 rounded"><code># Extract key from QR code (returns JSON)
|
||
curl -X POST "http://localhost:8000/extract-key-from-qr" \
|
||
-F "qr_image=@keyqr.png"</code></pre>
|
||
|
||
<div class="alert alert-info small mt-3">
|
||
<i class="bi bi-journal-text me-2"></i>
|
||
<strong>Interactive Documentation:</strong> When running the API server, visit
|
||
<code>/docs</code> for Swagger UI or <code>/redoc</code> for ReDoc documentation.
|
||
All endpoints include detailed schemas and example requests.
|
||
</div>
|
||
|
||
<h6 class="mt-4"><i class="bi bi-terminal me-2"></i>Command Line Interface</h6>
|
||
<p class="small">
|
||
Stegasoo also includes a full-featured CLI. Install with <code>pip install stegasoo[cli]</code>
|
||
or see the <a href="/cli">CLI documentation</a> for complete usage.
|
||
</p>
|
||
<pre class="bg-dark p-3 rounded"><code># CLI Examples
|
||
stegasoo generate --pin --words 3
|
||
stegasoo encode -r photo.jpg -c meme.png -p "phrase" --pin 123456 -m "secret"
|
||
stegasoo decode -r photo.jpg -s stego.png -p "phrase" --pin 123456
|
||
stegasoo info image.png</code></pre>
|
||
|
||
<p class="small text-muted mt-3 mb-0">
|
||
<span class="badge bg-{% if has_argon2 %}success{% else %}warning{% endif %} me-1">
|
||
{% if has_argon2 %}Argon2 Available{% else %}PBKDF2 Fallback{% endif %}
|
||
</span>
|
||
<span class="badge bg-{% if has_qrcode_read %}success{% else %}secondary{% endif %}">
|
||
{% if has_qrcode_read %}QR Reading Available{% else %}QR Reading Not Available{% endif %}
|
||
</span>
|
||
</p>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="card mb-4">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-question-circle me-2"></i>Usage Guide</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<div class="accordion" id="usageAccordion">
|
||
<div class="accordion-item bg-dark">
|
||
<h2 class="accordion-header">
|
||
<button class="accordion-button bg-dark text-light" type="button"
|
||
data-bs-toggle="collapse" data-bs-target="#setup">
|
||
<i class="bi bi-1-circle me-2"></i>Initial Setup
|
||
</button>
|
||
</h2>
|
||
<div id="setup" class="accordion-collapse collapse show" data-bs-parent="#usageAccordion">
|
||
<div class="accordion-body">
|
||
<ol>
|
||
<li>Both parties agree on a <strong>reference photo</strong> (shared secretly, never transmitted)</li>
|
||
<li>Go to <a href="/generate">Generate</a> and create credentials</li>
|
||
<li><strong>Memorize</strong> the 7 daily phrases and PIN</li>
|
||
<li>If using RSA, download and securely store the key file</li>
|
||
<li>Share credentials with your contact through a secure channel</li>
|
||
</ol>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="accordion-item bg-dark">
|
||
<h2 class="accordion-header">
|
||
<button class="accordion-button collapsed bg-dark text-light" type="button"
|
||
data-bs-toggle="collapse" data-bs-target="#encoding">
|
||
<i class="bi bi-2-circle me-2"></i>Encoding a Message or File
|
||
</button>
|
||
</h2>
|
||
<div id="encoding" class="accordion-collapse collapse" data-bs-parent="#usageAccordion">
|
||
<div class="accordion-body">
|
||
<ol>
|
||
<li>Go to <a href="/encode">Encode</a></li>
|
||
<li>Upload your <strong>reference photo</strong></li>
|
||
<li>Upload a <strong>carrier image</strong> (the image to hide data in)</li>
|
||
<li>Choose <strong>Text</strong> or <strong>File</strong> mode</li>
|
||
<li>Enter your message or select a file to embed</li>
|
||
<li>Enter <strong>today's phrase</strong> and your PIN/key</li>
|
||
<li>Download the resulting stego image</li>
|
||
<li>Send the stego image through any channel (email, social media, etc.)</li>
|
||
</ol>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="accordion-item bg-dark">
|
||
<h2 class="accordion-header">
|
||
<button class="accordion-button collapsed bg-dark text-light" type="button"
|
||
data-bs-toggle="collapse" data-bs-target="#decoding">
|
||
<i class="bi bi-3-circle me-2"></i>Decoding a Message or File
|
||
</button>
|
||
</h2>
|
||
<div id="decoding" class="accordion-collapse collapse" data-bs-parent="#usageAccordion">
|
||
<div class="accordion-body">
|
||
<ol>
|
||
<li>Go to <a href="/decode">Decode</a></li>
|
||
<li>Upload your <strong>reference photo</strong> (same one used for encoding)</li>
|
||
<li>Upload the <strong>stego image</strong> you received</li>
|
||
<li>Enter the phrase for <strong>the day it was encoded</strong> (check the filename for date)</li>
|
||
<li>Enter your PIN and/or RSA key</li>
|
||
<li>View the decoded message or download the extracted file</li>
|
||
</ol>
|
||
<div class="alert alert-warning small mt-3 mb-0">
|
||
<i class="bi bi-exclamation-triangle me-2"></i>
|
||
The stego image filename contains the encoding date (e.g., <code>abc123_20251228.png</code>).
|
||
Use this to determine which day's phrase to use!
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="card">
|
||
<div class="card-header">
|
||
<h5 class="mb-0"><i class="bi bi-speedometer2 me-2"></i>Limits & Specifications</h5>
|
||
</div>
|
||
<div class="card-body">
|
||
<table class="table table-dark table-striped">
|
||
<tbody>
|
||
<tr>
|
||
<td><i class="bi bi-file-text me-2"></i>Max text message</td>
|
||
<td><strong>2 million characters</strong> (~2 MB)</td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-file-earmark me-2"></i>Max file payload</td>
|
||
<td><strong>{{ max_payload_kb }} KB</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-image me-2"></i>Max carrier image</td>
|
||
<td><strong>24 megapixels</strong> (~6000×4000)</td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-upload me-2"></i>Max upload size</td>
|
||
<td><strong>30 MB</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-clock me-2"></i>Temp file expiry</td>
|
||
<td><strong>5 minutes</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-key me-2"></i>PIN length</td>
|
||
<td><strong>6-9 digits</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-shield me-2"></i>RSA key sizes</td>
|
||
<td><strong>2048, 3072, 4096 bits</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-chat-quote me-2"></i>Phrase length</td>
|
||
<td><strong>3-12 words</strong> (BIP-39 wordlist)</td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-cpu me-2"></i>API documentation</td>
|
||
<td><strong>/docs (Swagger)</strong> and <strong>/redoc</strong></td>
|
||
</tr>
|
||
<tr>
|
||
<td><i class="bi bi-qr-code me-2"></i>QR code support</td>
|
||
<td><strong>RSA key encoding/extraction </strong>(up to 3072 bit keys)</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="text-center mt-4 text-muted small">
|
||
<p>
|
||
Stegasoo v{{ version }} •
|
||
<i class="bi bi-github me-1"></i>Open Source •
|
||
Built with Python, FastAPI, and cryptography
|
||
</p>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
{% endblock %}
|