Initial commit

2025-06-12 22:55:04 +02:00
commit ecb089ea79
53 changed files with 3265 additions and 0 deletions
@@ -0,0 +1,9 @@
+MAX_PENDING_TIME=600
+MAX_STORE_TIME=259200
+FLASK_DEBUG=0
+FLASK_ENV=production
+DB_URI=postgresql://aperiuser:aperipass@postgres:5432/aperisolve
+RQ_DASHBOARD_REDIS_URL=redis://redis:6379/0
+POSTGRES_DB=aperisolve
+POSTGRES_USER=aperiuser
+POSTGRES_PASSWORD=aperipass
@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "" # See documentation for possible values
+    directory: "/" # Location of package manifests 
+    schedule:
+      interval: "weekly"
@@ -0,0 +1,42 @@
+name: Linters
+
+on: [push, pull_request]
+
+env:
+  FLAKE8_IGNORE: E203,E501,W503
+  PYLINT_IGNORE: W0718,R0903,R0801
+  MYPY_IGNORE: unused-awaitable
+
+permissions:
+  checks: write
+  contents: write
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.11
+
+      - name: Install Python dependencies
+        run: |
+          pip install isort black flake8 pylint mypy mypy-extensions
+          pip install -r aperisolve/requirements.txt
+
+      - name: Run linters
+        uses: wearerequired/lint-action@v2
+        with:
+          black: true
+          flake8: true
+          flake8_args: "--ignore=E203,E501,W503"
+          pylint: true
+          pylint_args: "--disable W0511,W0718,R0801,R0903,R0914"
+          mypy: true
+          mypy_args: "--disallow-any-generics --disallow-untyped-def --follow-imports skip --ignore-missing-imports --disable-error-code unused-awaitable"
@@ -0,0 +1,44 @@
+name: Docker Image CI
+
+on:
+  push:
+    tags:
+    - '*'
+
+jobs:
+
+  docker-releases:
+
+    runs-on: ubuntu-latest
+    steps:
+    - name: Get release version
+      run: echo "RELEASE_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
+    
+    - name: downcase username
+      run: echo "lower_actor=${GITHUB_ACTOR,,}" >> $GITHUB_ENV
+
+    - name: Checkout
+      uses: actions/checkout@v4
+      
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+    
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+    
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build and push Docker images
+      uses: docker/build-push-action@v6.9.0
+      with:
+          context: ./
+          push: true
+          tags: |
+                 ghcr.io/${{ env.lower_actor }}/aperisolve:latest
+                 ghcr.io/${{ env.lower_actor }}/aperisolve:${{ env.RELEASE_VERSION }}
+  
@@ -0,0 +1,4 @@
+# Python
+__pycache__/
+.mypy_cache/
+results/
@@ -0,0 +1,24 @@
+FROM python:3.11-slim AS build
+
+WORKDIR /
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    zip \
+    7zip \
+    binwalk \
+    foremost \
+    exiftool \
+    steghide \
+    ruby \
+    binutils \
+    outguess \
+    pngcheck \
+    && gem install zsteg \
+    && apt-get clean
+
+COPY aperisolve/ /aperisolve/
+
+RUN pip install --no-cache-dir -r /aperisolve/requirements.txt
+
+CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:5000", "aperisolve.wsgi:application"]
@@ -0,0 +1,95 @@
+# Aperi'Solve
+
+[![Website](https://img.shields.io/website?url=https%3A%2F%2Faperisolve.com)](https://aperisolve.com/)
+[![Rawsec's CyberSecurity Inventory](https://inventory.raw.pm/img/badges/Rawsec-inventoried-FF5050_flat.svg)](https://inventory.raw.pm/tools.html#Aperi'Solve)
+
+<p align="center"><a href="https://www.aperisolve.com"><img src="https://raw.githubusercontent.com/Zeecka/AperiSolve/master/examples/screenshot.png"/></a></p>
+
+<b>Try it now: https://www.aperisolve.com</b>
+
+## What is Aperi'Solve?
+
+Aperi'Solve is a platform which performs steganalysis on images.<br/>
+
+The platform uses *layer analysis*, "*zsteg*", "*steghide*", "*outguess*", "*exiftool*", "*binwalk*", "*foremost*" and "*strings*" for deeper steganography analysis.
+
+<p align="center"><a href="https://www.aperisolve.com"><img src="https://raw.githubusercontent.com/Zeecka/AperiSolve/master/examples/video.gif"/></a></p>
+
+### Why Aperi'Solve?
+
+Aperi'Solve has been created in order to have an "easy to use" platform which performs common steganalysis tests such as LSB or `steghide`. The platform is also a quick alternative for people who didn't manage to install tools like `zsteg` (ruby gem) properly.
+
+### Features
+
+Aperi'Solve is based on Python3 with Flask and PIL module, the platform supports the most common images formats like`.png`, `.jpg`, `.gif`, `.bmp`, `.jpeg`, `.jfif`, `.jpe`, `.tiff`...
+
+The platform allow you to:
+- **Visualise each bit layer** of each channel for a given image (ie. LSB of Red channel).
+- **Browse** and **Download each bit layer image**.
+- **Visualise `zsteg` informations** such as text encoded on LSB
+- **Download `steghide` files** using a defined password
+- **Download `outguess` files** using a defined password
+- **Visualise `exiftool` informations** such as geolocation or author
+- **Visualise `binwalk` informations**
+- **Download `binwalk` files** such as zip in png headers
+- **Download `foremost` files** such as zip in png headers
+- **Visualise `strings` output**
+
+## Installation
+
+Even if Aperi'Solve is available at the URL https://www.aperisolve.com/, you can set-up your own instance with the following command:
+
+```bash
+git clone https://github.com/Zeecka/AperiSolve.git
+cd aperisolve
+docker compose up -d
+```
+
+> Default will run on http://localhost:5000/
+
+## Developpment
+
+Aperi'Solve platform is a *Flask* web service (python 3.11+) with python workers performing analysis.
+Jobs are stacked in a redis-queue, and images informations are stored in a postgresql database.
+All services are well contained inside Docker containers.
+
+### Adding new analyzer
+
+Adding new analyzer is easy.
+
+1. Copy and addapt the [template_analyzer.py](aperisolve/analyzers/template_analyzer.py) file with you name, ie. "myanalyzer.py".
+2. Add this analyzer to [workers.py](aperisolve/workers.py).
+    - Import your function `from .analyzers.analyzer import analyze_myanalyzer`
+    - Add the function to `analyzers` variables, like other analyzers.
+3. Add your analyzer name to `TOOL_ORDER` in [aperisolve.js](aperisolve/static/js/aperisolve.js).
+
+### Tips
+
+Here is a batch of usefull commands.
+
+```bash
+docker compose down -v  # Remove volume containings results
+docker compose -f docker-compose-dev.yml up  # Start application in developpement mode
+rm -rf aperisolve/results  # Remove results from developpement mode
+```
+
+> Note, if you used [docker-compose-dev.yml](docker-compose-dev.yml), you must remove "results" when switching to [production docker](docker-compose.yml).
+
+### Code quality
+
+Python code follows the following linters:
+
+- Black
+- Flake8  (ignoring E203,E501,W503)
+- Pylint (ignoring W0718,R0903,R0801)
+- Mypy (ignoring unused-awaitable)
+
+GitHub CI will alert in case of failure.
+
+## Roadmap
+
+- [ ] PngCheck
+- [ ] Zsteg extract / --all --> **Download `zsteg` files** such as mp3 encoded on LSB
+- [ ] Test on mobile
+- [ ] i18n
+- [ ] Rootless analyzers ?
@@ -0,0 +1,68 @@
+"""Binwalk Analyzer for Image Submissions."""
+
+import shutil
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_binwalk(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using binwalk."""
+
+    image_name = input_img.name
+    extracted_dir = output_dir / f"_{image_name}.extracted"
+
+    try:
+        stderr = ""
+        # Run binwalk
+        data = subprocess.run(
+            ["binwalk", "-e", "../" + str(image_name), "--run-as=root"],
+            cwd=output_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        stderr += data.stderr
+
+        zip_exist = False
+        if extracted_dir.exists():
+            # Zip extracted files
+            zip_data = subprocess.run(
+                ["7z", "a", "../binwalk.7z", "*"],
+                cwd=extracted_dir,
+                capture_output=True,
+                text=True,
+                check=False,
+            )
+            zip_exist = True
+            stderr += zip_data.stderr
+
+        if len(stderr) > 0:
+            err = {
+                "binwalk": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        # Remove the extracted directory
+        if extracted_dir.exists():
+            shutil.rmtree(extracted_dir)
+
+        output_data = {
+            "binwalk": {
+                "status": "ok",
+                "output": data.stdout.split("\n") if data else [],
+            }
+        }
+        if zip_exist:
+            output_data["binwalk"]["download"] = f"/download/{output_dir.name}/binwalk"
+
+        update_data(output_dir, output_data)
+
+    except Exception as e:
+        update_data(output_dir, {"binwalk": {"status": "error", "error": str(e)}})
+    return None
@@ -0,0 +1,69 @@
+"""Bits Decomposer Analyzer for Image Submissions."""
+
+from pathlib import Path
+
+import numpy as np
+from PIL import Image
+
+from .utils import update_data
+
+
+def analyze_decomposer(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using bits decomposition."""
+    img = Image.open(input_img)
+    img_np = np.array(img)
+
+    # Handle grayscale, RGB, RGBA, etc.
+    if len(img_np.shape) == 2:
+        channels = 1
+    else:
+        channels = img_np.shape[2]
+
+    if channels > 1:
+        channel_names = ["Red", "Green", "Blue", "Alpha"]
+    else:
+        channel_names = ["Grayscale"]
+
+    image_json = {}
+
+    # Add Superimposed RGB bit planes
+    if channels >= 3:
+        superimposed_json = []
+        for bit in range(8):
+            bit_mask = 1 << bit
+            rgb_planes = [((img_np[..., c] & bit_mask) >> bit) * 255 for c in range(3)]
+            rgb_image = np.stack(rgb_planes, axis=-1).astype(np.uint8)
+            rgb_img = Image.fromarray(rgb_image, mode="RGB")
+            img_name = f"superimposed_bit_{bit}.png"
+            out_path = output_dir / img_name
+            dl_path = Path(output_dir.name) / img_name
+            superimposed_json.append("/image/" + str(dl_path))
+            rgb_img.save(out_path)
+
+        image_json["Superimposed"] = superimposed_json
+
+    # Process individual channels
+    for c in range(channels):
+        channel_data = img_np[..., c] if channels > 1 else img_np
+        channel_label = channel_names[c]
+        channel_json = []
+        for bit in range(8):
+            bit_mask = 1 << bit
+            bit_plane = ((channel_data & bit_mask) >> bit) * 255
+            bit_img = Image.fromarray(bit_plane.astype(np.uint8), mode="L")
+            img_name = f"{channel_label}_bit_{bit}.png"
+            out_path = output_dir / img_name
+            dl_path = Path(output_dir.name) / img_name
+            channel_json.append("/image/" + str(dl_path))
+            bit_img.save(out_path)
+        image_json[channel_label] = channel_json
+
+    update_data(
+        output_dir,
+        {
+            "decomposer": {
+                "status": "ok",
+                "images": image_json,
+            }
+        },
+    )
@@ -0,0 +1,38 @@
+"""Exiftool Analyzer for Image Submissions."""
+
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_exiftool(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using exiftool."""
+
+    try:
+        data = subprocess.run(
+            ["exiftool", input_img], capture_output=True, text=True, check=True
+        )
+
+        if data.stderr:
+            update_data(
+                output_dir, {"strings": {"status": "error", "error": data.stderr}}
+            )
+            return
+
+        metadata: dict[str, str] = {}
+        for line in data.stdout.split("\n"):
+            if ":" in line:
+                key, value = line.split(":", 1)
+                metadata[key.strip()] = value.strip()
+
+        # exiftool_dir = output_dir / "exiftool"
+        # exiftool_dir.mkdir(parents=True, exist_ok=True)
+        # update_data(exiftool_dir, metadata, "data.json")
+
+        update_data(
+            output_dir,
+            {"exiftool": {"status": "ok", "output": metadata}},
+        )
+    except Exception as e:
+        update_data(output_dir, {"exiftool": {"status": "error", "error": str(e)}})
@@ -0,0 +1,57 @@
+"""Foremost Analyzer for Image Submissions."""
+
+import shutil
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_foremost(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using foremost."""
+
+    try:
+        foremost_dir = output_dir / "foremost"
+        foremost_dir.mkdir(parents=True, exist_ok=True)
+
+        stderr = ""
+        # Run foremost
+        data = subprocess.run(
+            ["foremost", "-o", foremost_dir, "-i", input_img],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        # Note: foremost use stderr as standard output for results :o)
+        # So we can't use it as error dectection :
+        # stderr += data.stderr
+
+        # Zip extracted files
+        zip_data = subprocess.run(
+            ["7z", "a", "../foremost.7z", "*"],
+            cwd=foremost_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        stderr += zip_data.stderr
+
+        # Remove the extracted directory
+        shutil.rmtree(foremost_dir)
+
+        data_strings = data.stdout.split("\n") if data else []
+        data_strings = [s for s in data_strings if s]
+
+        update_data(
+            output_dir,
+            {
+                "foremost": {
+                    "status": "ok",
+                    "output": data_strings,
+                    "download": f"/download/{output_dir.name}/foremost",
+                }
+            },
+        )
+    except Exception as e:
+        update_data(output_dir, {"foremost": {"status": "error", "error": str(e)}})
@@ -0,0 +1,94 @@
+"""Outguess Analyzer for Image Submissions."""
+
+import shutil
+import subprocess
+from pathlib import Path
+from typing import Optional
+
+from .utils import update_data
+
+
+def analyze_outguess(
+    input_img: Path, output_dir: Path, password: Optional[str] = None
+) -> None:
+    """Analyze an image submission using stehide."""
+
+    image_name = input_img.name
+    try:
+        outguess_dir = output_dir / "outguess"
+        outguess_dir.mkdir(parents=True, exist_ok=True)
+        outguess_file = "outguess.data"
+        stderr = ""
+        cmd: list[str]
+        if password:
+            cmd = [
+                "outguess",
+                "-k",
+                password,
+                "-r",
+                "../../" + str(image_name),
+                outguess_file,
+            ]
+        else:
+            cmd = ["outguess", "-r", "../../" + str(image_name), outguess_file]
+
+        data = subprocess.run(
+            cmd,
+            cwd=outguess_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        if data.returncode != 0:
+            stderr += data.stderr
+            err = {
+                "outguess": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        # Zip extracted files
+        zip_data = subprocess.run(
+            ["7z", "a", "../outguess.7z", "*"],
+            cwd=outguess_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        stderr += zip_data.stderr
+
+        if len(stderr) > 0:
+            err = {
+                "outguess": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        # Remove the extracted directory
+        shutil.rmtree(outguess_dir)
+
+        data_strings = data.stderr.split("\n") if data else []
+        data_strings = [s for s in data_strings if s]
+
+        update_data(
+            output_dir,
+            {
+                "outguess": {
+                    "status": "ok",
+                    "output": data_strings,
+                    "download": f"/download/{output_dir.name}/outguess",
+                }
+            },
+        )
+
+    except Exception as e:
+        update_data(output_dir, {"outguess": {"status": "error", "error": str(e)}})
+    return None
@@ -0,0 +1,118 @@
+"""Steghide Analyzer for Image Submissions."""
+
+import re
+import shutil
+import subprocess
+from pathlib import Path
+from typing import Optional
+
+from .utils import update_data
+
+
+def analyze_steghide(
+    input_img: Path, output_dir: Path, password: Optional[str] = None
+) -> None:
+    """Analyze an image submission using stehide."""
+
+    image_name = input_img.name
+    try:
+        stderr = ""
+        # Get embedded file information first
+        cmd: list[str] = ["steghide", "info", "../" + str(image_name)]
+        if password:
+            cmd += ["-p", password]
+        else:
+            cmd += ["-p", ""]
+
+        data = subprocess.run(
+            cmd,
+            cwd=output_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        match = re.search(r'embedded file "([^"]+)"', data.stdout)
+        embedded_filename = match.group(1) if match else None
+
+        # if bad file format or wrong password, raise an error
+        if data.returncode != 0 or embedded_filename is None:
+            stderr += data.stderr.replace(f'"../{image_name}" ', "")  # hide file name
+            # the file format of the file \"../foobar.png\"  is not supported.
+            # become
+            # the file format of the file is not supported.
+            err = {
+                "steghide": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        # The passphrase is correct, we can extract the file
+        # prevent path traversal
+        embedded_file = output_dir / "steghide" / str(Path(embedded_filename).name)
+        extracted_dir = embedded_file.parent
+        extracted_dir.mkdir(parents=True, exist_ok=True)
+
+        cmd_ext: list[str] = [
+            "steghide",
+            "extract",
+            "-sf",
+            "../" + str(image_name),
+            "-xf",
+            str(embedded_filename),
+        ]
+        if password:
+            cmd_ext += ["-p", password]
+        else:
+            cmd_ext += ["-p", ""]
+
+        data = subprocess.run(
+            cmd_ext,
+            cwd=output_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        stderr += data.stderr
+
+        # Zip extracted files
+        zip_data = subprocess.run(
+            ["7z", "a", "../steghide.7z", "*"],
+            cwd=extracted_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        stderr += zip_data.stderr
+
+        if len(stderr) > 0:
+            err = {
+                "binwalk": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        # Remove the extracted directory
+        shutil.rmtree(extracted_dir)
+
+        update_data(
+            output_dir,
+            {
+                "steghide": {
+                    "status": "ok",
+                    "output": data.stdout.split("\n") if data else [],
+                    "download": f"/download/{output_dir.name}/steghide",
+                }
+            },
+        )
+
+    except Exception as e:
+        update_data(output_dir, {"steghide": {"status": "error", "error": str(e)}})
+    return None
@@ -0,0 +1,40 @@
+"""Strings Analyzer for Image Submissions."""
+
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_strings(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using strings."""
+
+    try:
+        data = subprocess.run(
+            ["strings", input_img], capture_output=True, text=True, check=False
+        )
+        if data.stderr:
+            update_data(
+                output_dir, {"strings": {"status": "error", "error": data.stderr}}
+            )
+            return
+
+        # strings_dir = output_dir / "strings"
+        # strings_dir.mkdir(parents=True, exist_ok=True)
+        # with open(strings_dir / "strings.txt", "w", encoding="utf-8") as f:
+        #    subprocess.run(["strings", input_img], stdout=f, check=True)
+
+        data_strings = data.stdout.split("\n") if data else []
+        data_strings = [s for s in data_strings if s]
+
+        update_data(
+            output_dir,
+            {
+                "strings": {
+                    "status": "ok",
+                    "output": data_strings,
+                }
+            },
+        )
+    except Exception as e:
+        update_data(output_dir, {"strings": {"status": "error", "error": str(e)}})
@@ -0,0 +1,74 @@
+"""Custom Analyzer for Image Submissions."""
+
+import shutil
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_myanalyzer(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using myanalyzer."""
+
+    image_name = input_img.name
+
+    # Dir generated by the tool
+    extracted_dir = output_dir / "myanalyzer_output_dir"
+
+    try:
+        stderr, stdout = "", ""
+
+        # Run myanalyzer
+        data = subprocess.run(
+            ["myanalyzer", "-e", "../" + str(image_name)],
+            cwd=output_dir,
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        stderr += data.stderr
+        stdout += data.stdout
+
+        if len(stderr) > 0:  # Return error if error has been raised
+            err = {
+                "myanalyzer": {
+                    "status": "error",
+                    "error": stderr,
+                }
+            }
+            update_data(output_dir, err)
+            return None
+
+        zip_exist = False
+        if extracted_dir.exists():  # If result file(s) exist, zip them
+            subprocess.run(
+                ["7z", "a", "../myanalyzer.7z", "*"],
+                cwd=extracted_dir,
+                capture_output=True,
+                text=True,
+                check=False,
+            )
+            zip_exist = True
+
+        if extracted_dir.exists():  # Remove the extracted directory
+            shutil.rmtree(extracted_dir)
+
+        output = data.stdout.split("\n") if data else []
+        output_data = {
+            "myanalyzer": {
+                "status": "ok",
+                "output": output,
+            }
+        }
+
+        if zip_exist:
+            output_data["myanalyzer"][
+                "download"
+            ] = f"/download/{output_dir.name}/myanalyzer"
+
+        update_data(output_dir, output_data)
+
+    except Exception as e:
+        update_data(output_dir, {"myanalyzer": {"status": "error", "error": str(e)}})
+    return None
@@ -0,0 +1,46 @@
+"""Utility functions for analyzers modules."""
+
+import fcntl
+import json
+import os
+import threading
+from pathlib import Path
+from typing import Any
+
+_thread_lock = threading.Lock()
+
+
+def update_data(
+    output_dir: Path, new_data: dict[Any, Any], json_filename: str = "results.json"
+) -> None:
+    """Thread-safe and process-safe JSON update using lock file and atomic replace."""
+    json_file = Path(output_dir) / json_filename
+    lock_file = json_file.with_suffix(json_file.suffix + ".lock")
+    tmp_file = json_file.with_suffix(json_file.suffix + ".tmp")
+
+    json_file.parent.mkdir(parents=True, exist_ok=True)
+
+    with _thread_lock:  # synchronizes across threads
+        with open(lock_file, "w", encoding="utf-8") as lock:
+            fcntl.flock(lock, fcntl.LOCK_EX)  # synchronizes across processes
+
+            try:
+                # Read existing JSON
+                data: dict[Any, Any] = {}
+                if json_file.exists():
+                    try:
+                        with open(json_file, "r", encoding="utf-8") as f:
+                            data = json.load(f)
+                    except json.JSONDecodeError:
+                        data = {}
+
+                # Update with new data
+                data.update(new_data)
+
+                # Write safely to a temp file
+                with open(tmp_file, "w", encoding="utf-8") as f:
+                    json.dump(data, f, sort_keys=False)
+
+                os.replace(tmp_file, json_file)  # ensures file write is atomic
+            finally:
+                fcntl.flock(lock, fcntl.LOCK_UN)
@@ -0,0 +1,36 @@
+"""Zsteg Analyzer for Image Submissions."""
+
+import subprocess
+from pathlib import Path
+
+from .utils import update_data
+
+
+def analyze_zsteg(input_img: Path, output_dir: Path) -> None:
+    """Analyze an image submission using zsteg."""
+
+    try:
+        data = subprocess.run(
+            ["zsteg", input_img], capture_output=True, text=True, check=False
+        )
+        if data.stderr or "PNG::NotSupported" in data.stdout[:100]:
+            error_msg = data.stderr or data.stdout
+            update_data(output_dir, {"zsteg": {"status": "error", "error": error_msg}})
+            return
+
+        # zsteg_dir = output_dir / "zsteg"
+        # zsteg_dir.mkdir(parents=True, exist_ok=True)
+        # with open(zsteg_dir / "zsteg.txt", "w", encoding="utf-8") as f:
+        #     subprocess.run(["zsteg", input_img], stdout=f, check=True)
+
+        update_data(
+            output_dir,
+            {
+                "zsteg": {
+                    "status": "ok",
+                    "output": data.stdout.split("\n") if data else [],
+                }
+            },
+        )
+    except Exception as e:
+        update_data(output_dir, {"zsteg": {"status": "error", "error": str(e)}})
@@ -0,0 +1,245 @@
+"""AperiSolve Flask application."""
+
+import hashlib
+import json
+import os
+import time
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Optional
+
+from flask import Flask, Response, abort, jsonify, render_template, request, send_file
+from redis import Redis
+from rq import Queue
+
+from .cleanup import cleanup_old_entries
+from .config import IMAGE_EXTENSIONS, RESULT_FOLDER, WORKER_FILES
+from .models import Image, Submission, db, init_db
+
+app: Flask = Flask(__name__)
+app.json.sort_keys = False  # type: ignore
+app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get("DB_URI")
+app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+RESULT_FOLDER.mkdir(parents=True, exist_ok=True)
+
+
+db.init_app(app)
+init_db(app)
+redis_conn = Redis(host="redis", port=6379)
+queue = Queue(connection=redis_conn)
+
+
+@app.route("/")
+def index() -> str:
+    """Render the main index page."""
+    return render_template("index.html")
+
+
+@app.route("/faq")
+def faq() -> str:
+    """Render the FAQ page."""
+    return render_template("faq.html")
+
+
+@app.route("/show")
+def show() -> str:
+    """Show all active submissions."""
+    db_images = Image.query.all()
+    images = []
+    for img in db_images:
+        last_sub = img.submissions[-1]
+        images.append({"file": f"/image/{img.hash}", "link": f"/{last_sub.hash}"})
+    return render_template("show.html", images=images)
+
+
+@app.route("/<hash_val>", methods=["GET"])
+def result_page(hash_val: str) -> str:
+    """Render the result page for a given submission hash."""
+    submission = Submission.query.get_or_404(hash_val)  # type: ignore
+    Image.query.get_or_404(submission.image_hash)  # type: ignore
+
+    return render_template("result.html", hash_val=hash_val)
+
+
+@app.route("/upload", methods=["POST"])
+def upload_image() -> tuple[Response, int]:
+    """Handle image upload and initiate analysis."""
+
+    cleanup_old_entries()
+
+    if "image" not in request.files:
+        return jsonify({"error": "No image provided"}), 400
+
+    image = request.files["image"]
+    password = request.form.get("password")
+    deep_analysis = request.form.get("deep") == "true"
+
+    if image.filename is None or image.filename == "":
+        return jsonify({"error": "No image provided"}), 400
+
+    if (
+        "." not in image.filename
+        or Path(image.filename).suffix.lower() not in IMAGE_EXTENSIONS
+    ):
+        return jsonify({"error": "Unsupported file type"}), 400
+
+    # Compute hashes and prepare submission
+    image_data = image.read()
+    img_hash = hashlib.md5(image_data).hexdigest()
+    image_name = img_hash + "." + image.filename.rsplit(".", maxsplit=1)[-1].lower()
+
+    submission_data = (
+        image_data
+        + image.filename.encode()
+        + (password.encode() if password else b"")
+        + (b"deep_analysis" if deep_analysis else b"")
+    )
+    submission_hash = hashlib.md5(submission_data).hexdigest()
+    submission_path = RESULT_FOLDER / img_hash / submission_hash
+
+    # If submission already exists, return submission hash
+    if submission_path.exists():
+        submission: Submission = Submission.query.filter_by(
+            hash=submission_hash
+        ).first()
+        return jsonify({"submission_hash": submission.hash}), 200
+
+    # If image is new, create a new Image entry
+    new_img_path = RESULT_FOLDER / img_hash / image_name
+    if not new_img_path.parent.exists():
+        new_img_path.parent.mkdir(parents=True, exist_ok=True)
+        with open(new_img_path, "wb") as f:  # Write file to disk
+            f.write(image_data)
+
+        new_img = Image(
+            file=str(new_img_path),
+            hash=img_hash,
+            size=len(image_data),
+            upload_count=0,
+            first_submission_date=datetime.now(timezone.utc),
+            last_submission_date=datetime.now(timezone.utc),
+        )
+        db.session.add(new_img)
+        db.session.commit()
+
+    sub_img = Image.query.filter_by(hash=img_hash).first()  # type: ignore
+    sub_img.upload_count += 1
+    db.session.commit()
+
+    # Create new Submission entry
+    submission_path.mkdir(parents=True, exist_ok=True)
+    submission = Submission(
+        filename=image.filename,
+        password=password,
+        deep_analysis=deep_analysis,
+        hash=submission_hash,
+        status="pending",
+        date=time.time(),
+        image_hash=sub_img.hash,  # type: ignore
+    )
+    db.session.add(submission)
+
+    db.session.commit()  # Commit to save the new Image and Submission
+    # Start the analysis jobs
+    queue.enqueue("aperisolve.workers.analyze_image", submission.hash, job_timeout=300)
+
+    return jsonify({"submission_hash": submission.hash}), 200
+
+
+@app.route("/status/<hash_val>", methods=["GET"])
+def get_status(hash_val: str) -> Response:
+    """Get the processing status of a submission."""
+    submission = Submission.query.get_or_404(hash_val)  # type: ignore
+    return jsonify({"status": submission.status})  # type: ignore
+
+
+@app.route("/infos/<hash_val>", methods=["GET"])
+def get_infos(hash_val: str) -> Response:
+    """Get the metadata and information of a submission."""
+    submission = Submission.query.get_or_404(hash_val)
+    image = Image.query.get_or_404(submission.image_hash)  # type: ignore
+    names = [name for name in set(sub.filename for sub in image.submissions) if name]
+    passwords = [pwd for pwd in set(sub.password for sub in image.submissions) if pwd]
+    return jsonify(
+        {
+            "image_path": "image/" + str(Path(image.file).name),
+            "names": names,
+            "size": image.size,
+            "first_submission_date": image.first_submission_date,
+            "last_submission_date": image.last_submission_date,
+            "upload_count": image.upload_count,
+            "passwords": passwords,
+        }
+    )  # type: ignore
+
+
+@app.route("/result/<hash_val>", methods=["GET"])
+def get_result(hash_val: str) -> tuple[Response, int]:
+    """Get the analysis results of a submission."""
+    submission = Submission.query.get_or_404(hash_val)
+    image = Image.query.get_or_404(submission.image_hash)  # type: ignore
+
+    result_path = (
+        RESULT_FOLDER / str(image.hash) / str(submission.hash) / "results.json"
+    )
+
+    if not result_path.exists():
+        return jsonify({"error": "Results not ready yet..."}), 425
+
+    with open(result_path, "r", encoding="utf-8") as f:
+        results = json.load(f)
+
+    return jsonify({"results": results}), 200
+
+
+@app.route("/download/<hash_val>/<tool>")
+def download_output(hash_val: str, tool: str) -> Response:
+    """Download the output of a specific analyzer for a given submission hash."""
+
+    submission = Submission.query.filter_by(hash=hash_val).first_or_404()
+    image = Image.query.get_or_404(submission.image_hash)  # type: ignore
+
+    output_dir = RESULT_FOLDER / str(image.hash) / str(submission.hash)
+    output_file = output_dir / f"{tool}.7z"
+
+    if tool not in WORKER_FILES or not output_file.exists():
+        abort(404, description="Tool output not found.")
+
+    return send_file(output_file, as_attachment=True)
+
+
+@app.route("/image/<img_name>")
+@app.route("/image/<hash_val>/<img_name>")
+def get_image(
+    hash_val: Optional[str] = None, img_name: Optional[str] = None
+) -> Response:
+    """
+    Download the image with a specific name (usually ones generated with
+    decomposer) for a given submission hash.
+    """
+
+    if img_name is None:
+        return abort(404, description="Image not found or unsupported format")
+
+    if hash_val is not None:
+        submission = Submission.query.filter_by(hash=hash_val).first_or_404()
+        image = Image.query.get_or_404(submission.image_hash)  # type: ignore
+
+        output_dir = RESULT_FOLDER / str(image.hash) / str(submission.hash)
+        output_file = output_dir / Path(img_name).name
+    else:
+        hash_val = img_name.split(".")[0]  # Extract hash from the image name
+        image = Image.query.filter_by(hash=hash_val).first_or_404()
+        output_file = Path(image.file)  # type: ignore
+
+    if (not output_file.exists()) or (
+        output_file.suffix.lower() not in IMAGE_EXTENSIONS
+    ):
+        return abort(404, description="Image not found or unsupported format")
+
+    return send_file(output_file, as_attachment=True)
+
+
+if __name__ == "__main__":
+    debug_mode = os.environ.get("FLASK_DEBUG", "false").lower() == "true"
+    app.run(host="0.0.0.0", port=5000, debug=debug_mode)
@@ -0,0 +1,50 @@
+"""Cleanup old entries in the database and file system."""
+
+import shutil
+import time
+from datetime import datetime, timezone
+from os import getenv
+from pathlib import Path
+
+from .models import Image, Submission, db
+
+RESULT_FOLDER = Path("./results")
+MAX_PENDING_TIME = int(getenv("MAX_PENDING_TIME", "600"))  # 10 minutes by default
+MAX_STORE_TIME = int(getenv("MAX_STORE_TIME", "259200"))  # 3 days by default
+
+
+def cleanup_old_entries() -> None:
+    """Clean up old entries in the database and file system."""
+    now = time.time()
+    for submission in Submission.query.all():  # type: ignore
+        if (
+            submission.status in ("pending", "running")  # type: ignore
+            and now - submission.date > MAX_PENDING_TIME  # type: ignore
+        ):
+            # Processing took too long, delete
+            db.session.delete(submission)  # type: ignore
+        elif submission.status == "done":  # type: ignore
+            # Search for buggy results, delete
+            result_path = (
+                RESULT_FOLDER / str(submission.image_hash) / str(submission.hash)
+            )
+            result_file = result_path / "results.json"
+            if not result_file.exists():
+                db.session.delete(submission)  # type: ignore
+                shutil.rmtree(result_path)
+
+    # Delete "old" images
+    for img in Image.query.all():  # type: ignore
+        if img.last_submission_date.tzinfo is None:
+            img_date = img.last_submission_date.replace(tzinfo=timezone.utc)
+        else:
+            img_date = img.last_submission_date
+        delay = datetime.now(timezone.utc) - img_date
+
+        if delay.total_seconds() > MAX_STORE_TIME:
+            for s in img.submissions:
+                db.session.delete(s)  # type: ignore
+            shutil.rmtree(RESULT_FOLDER / img.hash)  # type: ignore
+            db.session.delete(img)
+
+    db.session.commit()
@@ -0,0 +1,8 @@
+"""AperiSolve configuration variables."""
+
+from pathlib import Path
+
+IMAGE_EXTENSIONS = [".png", ".jpg", ".jpeg", ".gif", ".bmp", ".webp", ".tiff"]
+WORKER_FILES = ["binwalk", "foremost", "steghide", "zsteg"]
+
+RESULT_FOLDER = Path(__file__).parent.resolve() / "results"
@@ -0,0 +1,61 @@
+"""This module defines the database models for the Aperisolve application."""
+
+from datetime import datetime, timezone
+from decimal import Decimal
+
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy import Boolean, Column, DateTime, Float, Integer, String
+
+db: SQLAlchemy = SQLAlchemy()
+
+
+class Image(db.Model):  # type: ignore
+    """Model representing an image file in the database."""
+
+    hash: Column[str] = Column(
+        String(64), primary_key=True, unique=True, nullable=False
+    )
+    file: Column[str] = Column(String(128), unique=True, nullable=False)
+    size: Column[int] = Column(Integer, nullable=False)
+    first_submission_date: Column[datetime] = Column(
+        DateTime, nullable=False, default=lambda: datetime.now(timezone.utc)
+    )
+    last_submission_date: Column[datetime] = Column(
+        DateTime,
+        nullable=False,
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+    )
+    upload_count: Column[int] = Column(Integer)
+    submissions = db.relationship("Submission", backref="image", lazy=True)
+
+
+class Submission(db.Model):  # type: ignore
+    """Model representing a file submission for analysis.
+    Submissions are defined with a filename, password, image content, and analysis
+    option.
+    """
+
+    hash: Column[str] = Column(
+        String(128), primary_key=True, unique=True, nullable=False
+    )
+    filename: Column[str] = Column(String(128), nullable=False)
+    password: Column[str] = Column(String(128))
+    deep_analysis: Column[bool] = Column(Boolean, default=False)
+    status: Column[str] = Column(String(20), default="pending")
+    date: Column[Decimal] = Column(
+        Float, nullable=False, default=lambda: datetime.now(timezone.utc)
+    )
+
+    # Foreign key to Image
+    image_hash = Column(String, db.ForeignKey("image.hash"), nullable=False)
+
+
+def init_db(app: Flask) -> None:
+    """Initialize the database with the given Flask app."""
+    with app.app_context():
+        if not db.engine.dialect.has_table(db.engine.connect(), "image"):
+            print("Creating database...")
+            db.create_all()
+            print("Database created successfully.")
@@ -0,0 +1,10 @@
+Flask
+Flask-SQLAlchemy
+numpy
+redis
+rq
+psycopg2-binary
+types-Flask-SQLAlchemy
+sqlalchemy-stubs
+Pillow
+gunicorn
@@ -0,0 +1,410 @@
+/* ======== Base Layout ======== */
+::selection {
+    background: #c9fbff;
+    color: black;
+}
+
+:root {
+    --theme-dark-blue: #0b121f;
+    --theme-dark-blue-hover: #0d1931;
+    --theme-green: #9fef00;
+    --theme-green-shadow: #9fef0055;
+    --theme-green-shadow2: #9fef00aa;
+}
+
+html {
+    --dark-bg: var(--theme-dark-blue);
+    --dark-bg-hover: var(--theme-dark-blue-hover);
+    --bs-progress-bar-bg: #f00 !important;
+}
+
+body {
+    background-color: var(--dark-bg);
+    color: #e0e0e0;
+    font-family: 'Fira Code', monospace;
+}
+
+/* ======== Typography ======== */
+h1,
+h2,
+h3,
+h4,
+h5,
+h6,
+strong,
+.highlight {
+    color: var(--theme-green);
+    text-shadow: 0 0 5px var(--theme-green);
+}
+
+a,
+.text-accent {
+    color: var(--theme-green);
+    text-decoration: none;
+}
+
+a:hover {
+    color: #ccff66;
+    text-shadow: 0 0 5px #ccff66;
+}
+
+.title_link {
+    text-decoration: none;
+    color: inherit;
+}
+
+/* ======== Background ======== */
+
+#three-bg {
+    position: fixed;
+    top: 0;
+    left: 0;
+    z-index: 0;
+    width: 100%;
+    height: 100%;
+    pointer-events: none;
+    background-color: transparent;
+}
+
+.container,
+#result,
+form {
+    position: relative;
+    z-index: 1;
+}
+
+/* ======== Components ======== */
+
+.card,
+.form-control,
+.table,
+.border,
+.card-hack {
+    background-color: var(--dark-bg);
+    border: 1px solid var(--theme-green) !important;
+    color: #e0e0e0;
+    box-shadow: 0 0 10px var(--theme-green-shadow);
+    border-radius: 0.5rem;
+}
+
+.material-icons {
+    vertical-align: middle;
+}
+
+#main-img-right span {
+    font-weight: bold;
+    color: var(--theme-green);
+}
+
+#water-logo {
+    width: 70px;
+    display: inline;
+}
+
+/* Buttons */
+
+.btn,
+.btn-primary,
+.btn-hack {
+    background-color: var(--theme-green);
+    color: #000;
+    font-weight: bold;
+    border: none;
+    text-shadow: none;
+}
+
+.btn:hover,
+.btn-primary:hover,
+.btn-hack:hover {
+    background-color: var(--theme-green);
+    box-shadow: 0 0 10px var(--theme-green-shadow2);
+}
+
+/* Bootstrap contextual colors override */
+.text-success,
+.bg-success {
+    color: var(--theme-green) !important;
+    background-color: #1e2b00 !important;
+}
+
+.text-danger,
+.bg-danger {
+    color: #ff4d4d !important;
+    background-color: #330000 !important;
+}
+
+.text-warning,
+.bg-warning {
+    color: #ffcc00 !important;
+    background-color: #332b00 !important;
+}
+
+.text-info,
+.bg-info {
+    color: #00e6e6 !important;
+    background-color: #002e2e !important;
+}
+
+.analyzer {
+    margin-top: 25px;
+}
+
+.analyzer h2+div {
+    margin-top: 15px;
+}
+
+.analyzer h3 {
+    margin-top: 25px;
+}
+
+/* ======== Forms & Inputs ======== */
+input,
+textarea,
+select,
+pre {
+    border: 1px solid var(--theme-green);
+    color: #ffffff;
+}
+
+input:focus,
+textarea:focus,
+select:focus,
+pre {
+    outline: none;
+    box-shadow: 0 0 10px var(--theme-green);
+    background-color: var(--dark-bg-hover) !important;
+}
+
+
+textarea.form-control,
+pre {
+    padding: 25px;
+}
+
+.textarea-container {
+    display: block;
+}
+
+.copy-icon {
+    position: absolute;
+    right: 10px;
+    margin-top: -40px;
+    cursor: pointer;
+    display: none;
+    color: #555;
+    background: rgba(255, 255, 255, 0.8);
+    border-radius: 4px;
+    padding: 4px;
+    transition: color 0.2s;
+}
+
+.textarea-container:hover .copy-icon {
+    display: block;
+}
+
+.copy-icon:hover {
+    color: #000;
+}
+
+/* File drop zone */
+#drop-zone {
+    background-color: var(--dark-bg);
+    border: 2px dashed var(--theme-green);
+    color: var(--theme-green);
+    transition: all 0.3s ease;
+}
+
+#drop-zone:hover,
+#drop-zone.dragover {
+    background-color: var(--dark-bg-hover);
+    box-shadow: 0 0 10px var(--theme-green);
+}
+
+#upload-form {
+    transition: height 0.4s ease, padding 0.4s ease, margin 0.4s ease;
+    overflow: hidden;
+}
+
+/* ======== Tables ======== */
+table {
+    width: 100%;
+    background-color: var(--theme-dark-blue);
+    border-collapse: collapse;
+    color: white;
+}
+
+th,
+td {
+    border: 1px solid var(--theme-dark-blue);
+    padding: 0.75rem;
+}
+
+th,
+td:first-child {
+    color: var(--theme-green);
+}
+
+tr:nth-child(even) {
+    background-color: rgba(0, 0, 0, 0.25);
+}
+
+tr:first-child td {
+    border-top: 1px solid #ddd;
+}
+
+td {
+    text-align: left;
+    border-bottom: 1px solid #ddd;
+}
+
+/* ======== Images ======== */
+#result img {
+    width: 100%;
+    height: auto;
+    cursor: pointer;
+}
+
+.results_img {
+    width: 25%;
+    display: inline-block;
+    padding: 10px;
+    box-sizing: border-box;
+}
+
+/* ======== Modal ======== */
+#image-modal-container {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.9);
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    opacity: 0;
+    visibility: hidden;
+    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
+    z-index: 1000;
+}
+
+#image-modal-container img {
+    width: 60%;
+    border: 2px solid var(--theme-green);
+    box-shadow: 0 0 20px var(--theme-green);
+    cursor: pointer;
+}
+
+#image-modal-container.modal-visible {
+    opacity: 1;
+    visibility: visible;
+}
+
+.browse-images {
+    display: inline-block;
+    padding: 10px;
+    width: 25%;
+}
+
+/* ======== FAQ ======== */
+
+#cheatsheet>div {
+    background-color: rgba(0, 0, 0, 0.5);
+    padding: 10px;
+    margin-top: 10px;
+    margin-bottom: 50px;
+}
+
+.command {
+    background-color: var(--theme-dark-blue);
+    border: 3px solid var(--theme-green);
+    padding: 5px 10px;
+    margin-bottom: 25px;
+}
+
+#cheatsheet ul {
+    list-style: none;
+    padding-left: 5px;
+    margin-left: 0;
+}
+
+#cheatsheet li::before {
+    content: "\f054";
+    font-family: "Font Awesome 6 Free";
+    font-weight: 900;
+    position: absolute;
+    left: 0;
+    top: 0;
+    color: var(--theme-green);
+}
+
+#cheatsheet li {
+    padding-left: 25px;
+}
+
+#cheatsheet img,
+#cheatsheet table {
+    margin-bottom: 15px;
+}
+
+/* ======== Analyzer Blocks ======== */
+
+.analyzer {
+    margin-bottom: 10px;
+}
+
+#result-infos {
+    display: flex;
+}
+
+#result-infos>div {
+    height: 100%;
+    width: 50%;
+    height: auto;
+    flex: 1 1 0;
+    width: 50%;
+    display: inline-block;
+    padding: 10px;
+    box-sizing: border-box;
+    vertical-align: top;
+}
+
+
+.a-exiftool .table-container {
+    max-height: 400px;
+    overflow-y: auto;
+}
+
+.a-strings textarea {
+    height: 400px;
+}
+
+/* ======== Footer ======== */
+
+footer {
+    position: relative;
+    z-index: 1;
+    margin: 0 20px 20px 0;
+    justify-content: flex-end !important;
+}
+@media screen and (min-width: 1800px) {
+    footer {
+        position: fixed;
+        bottom: 0;
+        right: 0;
+        left: auto;
+        margin: 0 20px 20px 0;
+    }
+}
+
+
+footer a i {
+    font-size: 32px;
+}
+
+/* ======== Utility ======== */
+
+.glow-border {
+    border: 1px solid var(--theme-green);
+    box-shadow: 0 0 10px var(--theme-green-shadow);
+}
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
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+  <g transform="matrix(2.383155, 0, 0, 2.383155, -289.696167, -169.945801)" style="">
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+    <path style="stroke: rgb(0, 0, 0); fill: rgb(159, 239, 0);" d="M 124.977 235.493 C 127.445 230.983 129.889 226.459 132.38 221.962 C 132.953 220.928 133.002 218.705 134.168 218.899 C 138.489 219.619 142.108 222.611 146.166 224.26 C 158.45 229.25 168.269 234.918 183.184 238.812 C 211.525 246.212 242.407 248.212 271.005 241.875 C 291.758 237.276 302.132 226.415 318.49 220.686 C 319.92 220.185 320.587 222.922 321.298 224.26 C 323.495 228.396 330.058 233.337 327.17 237.025 C 295.801 277.087 172.547 281.531 124.977 233.195"/>
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+      <path d="M1524 1556 c-17 -43 31 -116 75 -116 42 0 62 23 74 85 5 30 5 30 -41 30 -26 0 -59 4 -74 9 -22 6 -29 4 -34 -8z m94 -58 c19 -16 14 -38 -10 -38 -21 0 -58 26 -58 40 0 11 53 9 68 -2z"/>
+      <path d="M1822 1514 c-27 -18 -28 -36 -4 -57 23 -21 51 -22 80 -1 26 18 28 37 6 58 -20 20 -53 20 -82 0z m72 -10 c24 -9 19 -33 -9 -40 -33 -8 -75 3 -75 20 0 22 48 34 84 20z"/>
+      <path d="M1292 1488 c-31 -31 -1 -68 55 -68 33 0 53 16 53 42 0 33 -81 53 -108 26z m72 -8 c14 -5 26 -14 26 -20 0 -16 -42 -29 -73 -23 -43 8 -34 34 20 52 1 1 13 -3 27 -9z"/>
+      <path d="M835 1351 c-14 -28 -12 -61 4 -61 17 0 31 26 31 57 0 41 -15 42 -35 4z"/>
+      <path d="M2034 1306 c-10 -25 13 -68 34 -64 25 5 22 48 -5 65 -20 14 -23 14 -29 -1z"/>
+      <path d="M1131 1261 c-15 -27 -14 -46 5 -61 12 -11 18 -10 31 3 13 13 15 23 7 44 -12 34 -30 40 -43 14z"/>
+      <path d="M1401 1231 c-16 -29 -13 -58 6 -65 36 -14 50 47 18 74 -10 9 -16 6 -24 -9z"/>
+      <path d="M1714 1226 c-3 -8 -4 -25 -2 -38 4 -32 42 -32 46 0 6 38 -32 70 -44 38z"/>
+      <path d="M654 1201 c22 -24 196 -114 205 -106 8 9 -19 28 -116 80 -88 49 -117 57 -89 26z"/>
+      <path d="M 2260 1044 C 1912 837 1410 803 947 956 C 904 970 866 979 862 975 C 846 959 1325 845 1325 845 C 1397 831 1617 828 1718 840 C 1832 853 2081 930 2090 930 C 2098 930 2332 1045 2332 1045 L 2349 1022 C 2358 1009 2378 984 2394 967 L 2422 935 L 2394 985 C 2379 1013 2360 1047 2352 1063 C 2345 1078 2338 1090 2337 1089 C 2336 1089 2301 1069 2260 1044"/>
+      <path d=""/>
+      <path d=""/>
+    </g>
+  </g>
+</svg>
@@ -0,0 +1,478 @@
+const TOOL_ORDER = [
+  "decomposer",
+  "exiftool",
+  "binwalk",
+  "foremost",
+  "outguess",
+  "steghide",
+  "zsteg",
+  "strings",
+];
+
+function escapeHtml(text) {
+  if (typeof text !== "string") return text;
+  return text
+    .replace(/&/g, "&amp;")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#039;");
+}
+
+function capitalize(str) {
+  if (typeof str !== "string" || str.length === 0) return str;
+  return str.charAt(0).toUpperCase() + str.slice(1);
+}
+
+function slideUp(element, duration = 400) {
+  element.style.height = element.offsetHeight + "px";
+  element.offsetHeight; // force reflow
+  element.style.transitionProperty = "height, margin, padding";
+  element.style.transitionDuration = duration + "ms";
+  element.style.boxSizing = "border-box";
+  element.style.overflow = "hidden";
+  element.style.height = 0;
+  element.style.paddingTop = 0;
+  element.style.paddingBottom = 0;
+  element.style.marginTop = 0;
+  element.style.marginBottom = 0;
+
+  window.setTimeout(() => {
+    element.style.display = "none";
+    // Optional: reset styles
+    element.style.removeProperty("height");
+    element.style.removeProperty("padding-top");
+    element.style.removeProperty("padding-bottom");
+    element.style.removeProperty("margin-top");
+    element.style.removeProperty("margin-bottom");
+    element.style.removeProperty("overflow");
+    element.style.removeProperty("transition-duration");
+    element.style.removeProperty("transition-property");
+  }, duration);
+}
+
+function formatBytes(bytes) {
+  if (typeof bytes !== "number" || isNaN(bytes)) return bytes;
+  const units = ["o", "Ko", "Mo", "Go", "To", "Po"];
+  let i = 0;
+  while (bytes >= 1024 && i < units.length - 1) {
+    bytes /= 1024;
+    i++;
+  }
+  return `${bytes % 1 === 0 ? bytes : bytes.toFixed(2)} ${units[i]}`;
+}
+
+/**
+ * Alert functions
+ */
+
+function showAlert(message, alertType, reset) {
+  const resultDiv = document.getElementById("result-analyzers");
+  if (reset) {
+    resultDiv.innerHTML = "";
+  }
+  resultDiv.innerHTML += `<div class="alert alert-${escapeHtml(
+    alertType
+  )}" role="alert">${escapeHtml(message)}</div>`;
+}
+
+function showSuccess(message, reset) {
+  showAlert(message, "success", reset);
+}
+function showDanger(message, reset) {
+  showAlert(message, "danger", reset);
+}
+function showWarning(message, reset) {
+  showAlert(message, "warning", reset);
+}
+function showInfo(message, reset) {
+  showAlert(message, "info", reset);
+}
+
+/**
+ * Copy to clipboard
+ */
+
+document.addEventListener('click', function (event) {
+    // Check if the clicked element is a copy icon
+    if (event.target.classList.contains('copy-icon')) {
+      const icon = event.target;
+      const textarea = icon.closest('.textarea-container').querySelector('textarea');
+
+      if (textarea) {
+        textarea.select();
+        navigator.clipboard.writeText(textarea.value).then(() => {
+          icon.classList.remove('fa-copy');
+          icon.classList.add('fa-check');
+          setTimeout(() => {
+            icon.classList.remove('fa-check');
+            icon.classList.add('fa-copy');
+          }, 1500);
+        });
+      }
+    }
+  });
+
+/**
+ * Image preview functions
+ */
+
+// Reference the modal elements
+const modal = document.getElementById("image-modal-container");
+const modalImage = document.getElementById("modal-image");
+
+let currentImages = [];
+let currentIndex = -1;
+
+function updateCurrentImages() {
+  currentImages = Array.from(document.querySelectorAll(".results_img img"));
+}
+
+// Function to handle image click (open modal)
+function openImageModal(src) {
+  updateCurrentImages();
+  currentIndex = currentImages.findIndex((img) => img.src === src);
+  if (currentIndex !== -1) {
+    modalImage.src = currentImages[currentIndex].src;
+    modal.classList.add("modal-visible");
+    modal.classList.remove("modal-hidden");
+  }
+}
+
+function closeImageModal() {
+  modal.classList.remove("modal-visible");
+  modal.classList.add("modal-hidden");
+  currentIndex = -1;
+}
+
+// Handle dynamic images added with innerHTML
+document.addEventListener("click", function (e) {
+  const img = e.target.closest(".results_img img");
+  if (img) {
+    openImageModal(img.src);
+  }
+});
+
+// Click on modal image to download and close
+modalImage.addEventListener("click", function () {
+  const link = document.createElement("a");
+  link.href = modalImage.src;
+  link.download = modalImage.src.split("/").pop();
+  document.body.appendChild(link);
+  link.click();
+  document.body.removeChild(link);
+  closeImageModal();
+});
+
+// Optional: Close modal if user clicks outside the image
+modal.addEventListener("click", function (e) {
+  if (e.target === modal) {
+    closeImageModal();
+  }
+});
+
+// Keyboard support
+document.addEventListener("keydown", function (e) {
+  if (!modal.classList.contains("modal-visible")) return;
+
+  if (e.key === "Escape") {
+    closeImageModal();
+  } else if (e.key === "ArrowLeft") {
+    // Show previous image
+    if (currentIndex > 0) {
+      currentIndex--;
+      modalImage.src = currentImages[currentIndex].src;
+    }
+  } else if (e.key === "ArrowRight") {
+    // Show next image
+    if (currentIndex < currentImages.length - 1) {
+      currentIndex++;
+      modalImage.src = currentImages[currentIndex].src;
+    }
+  }
+});
+
+async function fetchImageInfo(submission_hash) {
+  const infoResp = await fetch(`/infos/${submission_hash}`);
+  const infoData = await infoResp.json();
+
+  const resultInfosDiv = document.getElementById("result-infos");
+  resultInfosDiv.innerHTML = ""; // Clear previous info
+
+  const mainImgLeft = document.createElement("div");
+  const mainImgRight = document.createElement("div");
+  const tableInfos = document.createElement("table");
+  mainImgLeft.id = "main-img-left";
+  mainImgRight.id = "main-img-right";
+  resultInfosDiv.appendChild(mainImgLeft);
+  resultInfosDiv.appendChild(mainImgRight);
+  mainImgRight.appendChild(tableInfos);
+
+  mainImgLeft.innerHTML += `<div id="main_image"><img src="${infoData.image_path}"/></div>`;
+  tableInfos.innerHTML += `<tr><td><i class="fa fa-backward-step"></i> First upload:</td><td>${infoData.first_submission_date}</td></tr>`;
+  tableInfos.innerHTML += `<tr><td><i class="fa fa-history"></i> Last upload:</td><td>${infoData.last_submission_date}</td></tr>`;
+  if (Array.isArray(infoData.names)) {
+    const nameList = infoData.names
+      .map((name) => `<code>${escapeHtml(name)}</code>`)
+      .join(", ");
+    tableInfos.innerHTML += `<tr><td><i class="fa fa-list"></i> Name(s):</td><td>${nameList}</td></tr>`;
+  }
+  tableInfos.innerHTML += `<tr><td><i class="fa fa-balance-scale"></i> Size:</td><td>${formatBytes(
+    infoData.size
+  )}</td></tr>`;
+  tableInfos.innerHTML += `<tr><td><i class="fa fa-upload"></i> Upload count:</td><td>${infoData.upload_count}</td></tr>`;
+  if (Array.isArray(infoData.passwords)) {
+    const passwordList = infoData.passwords
+      .map((pwd) => `<code>${escapeHtml(pwd)}</code>`)
+      .join(", ");
+    tableInfos.innerHTML += `<tr><td><i class="fa fa-key"></i> Common password(s):</td><td>${passwordList}</td></tr>`;
+  }
+}
+
+/**
+ * Parsing results from the server
+ */
+
+function parseResult(result) {
+  const resultDiv = document.getElementById("result-analyzers");
+  resultDiv.innerHTML = "";
+
+  for (const tool of TOOL_ORDER) {
+    if (!Object.keys(result).includes(tool)) {
+      // Skip if the tool is not in the result
+      continue;
+    }
+
+    const analyzer = document.createElement("div");
+    analyzer.className = `analyzer a-${escapeHtml(tool)}`;
+    resultDiv.appendChild(analyzer);
+
+    analyzer.innerHTML += `<h2>${capitalize(tool)}</h2>`;
+
+    if (result[tool]["status"] === "ok") {
+      if ("images" in result[tool]) {
+        // Parse image output
+        var channels = ["Superimposed", "Red", "Green", "Blue", "Alpha"];
+        if (Object.keys(result[tool]["images"]).length == 1) {
+          channels = ["Greyscale"];
+        } else if (Object.keys(result[tool]["images"]).length == 4) {
+          channels = ["Superimposed", "Red", "Green", "Blue"];
+        }
+
+        for (const channel of channels) {
+          const images = result[tool]["images"][channel];
+          analyzer.innerHTML += `<h3>${capitalize(escapeHtml(channel))}</h3>`;
+          for (const image of images) {
+            analyzer.innerHTML += `<div class='results_img'><img src='${escapeHtml(
+              image
+            )}'/></div>`;
+          }
+        }
+      }
+      // Parse text output
+
+      if (typeof result[tool]["output"] === "string") {
+        analyzer.innerHTML += `<pre>${escapeHtml(
+          result[tool]["output"]
+        )}</pre>`;
+      } else if (Array.isArray(result[tool]["output"])) {
+        if (result[tool]["output"].length > 0) {
+          var texarea_content = `<div class="textarea-container">`;
+          texarea_content += `<textarea class="form-control w-100 mb-2" rows="8" readonly>`;
+          for (const line of result[tool]["output"]) {
+            texarea_content += escapeHtml(`${line}\n`);
+          }
+          texarea_content += `</textarea>`;
+          texarea_content += `<i class="fas fa-copy copy-icon"></i>`;
+          texarea_content += `</div>`;
+          analyzer.innerHTML += texarea_content;
+        }
+      } else if (typeof result[tool]["output"] === "object") {
+        var table_content = `<div class="table-container">`;
+        table_content += `<table>`;
+        for (const key in result[tool]["output"]) {
+          table_content += `<tr><td>${escapeHtml(key)}</td>`;
+          table_content += `<td>${escapeHtml(
+            result[tool]["output"][key]
+          )}</td></tr>`;
+        }
+        table_content += `</table>`;
+        table_content += `</table>`;
+        analyzer.innerHTML += table_content;
+      } else {
+        // analyzer.innerHTML += `<pre>${result[tool]["output"]}</pre>`;
+      }
+
+      if ("download" in result[tool]) {
+        // Parse download link
+        analyzer.innerHTML += `<br/><a href="${escapeHtml(
+          result[tool]["download"]
+        )}" target="_blank" class="btn btn-primary mt-2"><i class="fa fa-download"></i> Download file</a>`;
+      }
+    } else if (result[tool]["status"] === "error") {
+      showDanger(result[tool]["error"]);
+    }
+  }
+}
+
+// Poll status of a submission
+async function pollStatus(submission_hash) {
+  if (!window.location.pathname.endsWith(`/${submission_hash}`)) {
+    window.history.pushState({}, "", `/${submission_hash}`);
+  }
+  const statusResp = await fetch(`/status/${submission_hash}`);
+  const statusData = await statusResp.json();
+  if (statusData.status === "completed") {
+    const resultResp = await fetch(`/result/${submission_hash}`);
+    const resultData = await resultResp.json();
+    fetchImageInfo(submission_hash);
+    if ("error" in resultData){
+      showWarning(`❌ ${resultData.error}`, true);
+    }else if ("results" in resultData) {
+      parseResult(resultData.results);
+    }
+  } else if (statusData.status === "error") {
+    //resultDiv.innerHTML = "";
+    showDanger("❌ Error during the analysis.", true);
+  } else {
+    setTimeout(() => pollStatus(submission_hash), 1000);
+    try {
+      const resultResp = await fetch(`/result/${submission_hash}`);
+      const resultData = await resultResp.json();
+      if ("error" in resultData){
+        // showWarning(`❌ ${resultData.error}`, true);
+      }else if ("results" in resultData) {
+        fetchImageInfo(submission_hash);
+        parseResult(resultData.results);
+      }
+    } catch (error) {
+      console.dir(error);
+    }
+  }
+}
+
+/**
+ * Drag and drop functionality
+ */
+
+const dropZone = document.getElementById("drop-zone");
+const fileInput = document.getElementById("image");
+const browseBtn = document.getElementById("browse-btn");
+const dragMsg = document.getElementById("drag-msg");
+
+function showFilename(filename) {
+  dragMsg.innerHTML = "🖼️ " + escapeHtml(filename);
+}
+
+if (browseBtn) {
+  // Clicking the button triggers file input
+  browseBtn.addEventListener("click", () => fileInput.click());
+  dropZone.addEventListener("click", () => fileInput.click());
+  dropZone.addEventListener("dragover", (e) => {
+    e.preventDefault();
+    dropZone.style.boxShadow = "0 0 20px #9fef00";
+  });
+  dropZone.addEventListener("dragleave", () => {
+    dropZone.style.boxShadow = "";
+  });
+
+  // Drag events
+  ["dragenter", "dragover"].forEach((eventName) => {
+    dropZone.addEventListener(eventName, (e) => {
+      e.preventDefault();
+      dropZone.classList.add("dragover");
+    });
+  });
+
+  ["dragleave", "drop"].forEach((eventName) => {
+    dropZone.addEventListener(eventName, (e) => {
+      e.preventDefault();
+      dropZone.classList.remove("dragover");
+    });
+  });
+
+  // Drop file
+  dropZone.addEventListener("drop", (e) => {
+    const files = e.dataTransfer.files;
+    if (files.length > 0) {
+      fileInput.files = files; // Attach files to the hidden input
+      showFilename(fileInput.files[0].name);
+    }
+  });
+
+  fileInput.addEventListener("change", () => {
+    if (fileInput.files.length > 0) {
+      showFilename(fileInput.files[0].name);
+    }
+  });
+
+  // File upload Form submission
+
+  document
+    .getElementById("upload-form")
+    .addEventListener("submit", function (e) {
+      e.preventDefault();
+
+      const fileInput = document.getElementById("image");
+      const passwordInput = document.getElementById("password");
+      const deepCheckbox = document.getElementById("deep");
+      const progressContainer = document.getElementById("progress-container");
+      const progressBar = document.getElementById("progress-bar");
+
+      if (!fileInput.files.length) {
+        showDanger("Please select an image.", true);
+      }
+
+      const formData = new FormData();
+      formData.append("image", fileInput.files[0]);
+      formData.append("password", passwordInput.value);
+      formData.append("deep", deepCheckbox.checked);
+
+      const xhr = new XMLHttpRequest();
+      xhr.open("POST", "/upload", true);
+
+      xhr.upload.addEventListener("loadstart", () => {
+        progressContainer.classList.remove("d-none");
+        progressBar.style.width = "0%";
+        progressBar.textContent = "0%";
+      });
+
+      xhr.upload.addEventListener("progress", (e) => {
+        if (e.lengthComputable) {
+          const percent = Math.round((e.loaded / e.total) * 100);
+          progressBar.style.width = percent + "%";
+          progressBar.textContent = percent + "%";
+        }
+      });
+
+      xhr.onload = () => {
+        if (xhr.status === 200) {
+          try {
+            const response = JSON.parse(xhr.responseText);
+            if (response.submission_hash) {
+              pollStatus(response.submission_hash);
+            } else {
+              showDanger(
+                "❌ Invalid server response: missing submission_hash.",
+                true
+              );
+            }
+          } catch (e) {
+            showDanger("❌ Invalid server response.", true);
+          }
+        } else {
+          showDanger(`❌ HTTP error ${xhr.status}`, true);
+        }
+        progressBar.style.width = "100%";
+        progressBar.textContent = "Upload complete";
+        const uploadForm = document.getElementById("upload-form");
+        slideUp(uploadForm);
+      };
+
+      xhr.onerror = () => {
+        showDanger("❌ An error occurred during the transfer", true);
+      };
+
+      xhr.send(formData);
+    });
+}
@@ -0,0 +1,167 @@
+import * as THREE from "three";
+
+import Stats from "three/addons/stats.module.js";
+
+let container, stats;
+let camera, scene, renderer, mesh;
+
+const instances = 5000;
+let lastTime = 0;
+
+const moveQ = new THREE.Quaternion(0.5, 0.5, 0.5, 0.0).normalize();
+const tmpQ = new THREE.Quaternion();
+const tmpM = new THREE.Matrix4();
+const currentM = new THREE.Matrix4();
+
+init();
+
+function init() {
+  container = document.getElementById("three-bg");
+
+  camera = new THREE.PerspectiveCamera(
+    50,
+    window.innerWidth / window.innerHeight,
+    1,
+    1000
+  );
+
+  scene = new THREE.Scene();
+  // Get the computed background color of the body
+  const bodyBg = getComputedStyle(document.body).backgroundColor;
+  scene.background = new THREE.Color(bodyBg);
+
+  // geometry
+
+  const geometry = new THREE.InstancedBufferGeometry();
+
+  // per mesh data x,y,z,w,u,v,s,t for 4-element alignment
+  // only use x,y,z and u,v; but x, y, z, nx, ny, nz, u, v would be a good layout
+  const vertexBuffer = new THREE.InterleavedBuffer(
+    new Float32Array([
+      // Front
+      -1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, -1, -1, 1, 0, 0, 1, 0, 0,
+      1, -1, 1, 0, 1, 1, 0, 0,
+      // Back
+      1, 1, -1, 0, 1, 0, 0, 0, -1, 1, -1, 0, 0, 0, 0, 0, 1, -1, -1, 0, 1, 1, 0,
+      0, -1, -1, -1, 0, 0, 1, 0, 0,
+      // Left
+      -1, 1, -1, 0, 1, 1, 0, 0, -1, 1, 1, 0, 1, 0, 0, 0, -1, -1, -1, 0, 0, 1, 0,
+      0, -1, -1, 1, 0, 0, 0, 0, 0,
+      // Right
+      1, 1, 1, 0, 1, 0, 0, 0, 1, 1, -1, 0, 1, 1, 0, 0, 1, -1, 1, 0, 0, 0, 0, 0,
+      1, -1, -1, 0, 0, 1, 0, 0,
+      // Top
+      -1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, -1, 1, -1, 0, 0, 1, 0, 0,
+      1, 1, -1, 0, 1, 1, 0, 0,
+      // Bottom
+      1, -1, 1, 0, 1, 0, 0, 0, -1, -1, 1, 0, 0, 0, 0, 0, 1, -1, -1, 0, 1, 1, 0,
+      0, -1, -1, -1, 0, 0, 1, 0, 0,
+    ]),
+    8
+  );
+
+  // Use vertexBuffer, starting at offset 0, 3 items in position attribute
+  const positions = new THREE.InterleavedBufferAttribute(vertexBuffer, 3, 0);
+  geometry.setAttribute("position", positions);
+  // Use vertexBuffer, starting at offset 4, 2 items in uv attribute
+  const uvs = new THREE.InterleavedBufferAttribute(vertexBuffer, 2, 4);
+  geometry.setAttribute("uv", uvs);
+
+  const indices = new Uint16Array([
+    0, 2, 1, 2, 3, 1, 4, 6, 5, 6, 7, 5, 8, 10, 9, 10, 11, 9, 12, 14, 13, 14, 15,
+    13, 16, 17, 18, 18, 17, 19, 20, 21, 22, 22, 21, 23,
+  ]);
+
+  geometry.setIndex(new THREE.BufferAttribute(indices, 1));
+
+  // material
+
+  const material = new THREE.MeshBasicMaterial();
+  material.map = new THREE.TextureLoader().load("static/img/octo2.png");
+  material.map.colorSpace = THREE.SRGBColorSpace;
+  material.map.flipY = false;
+  material.transparent = true;
+  material.opacity = 0.3;
+
+  // per instance data
+
+  const matrix = new THREE.Matrix4();
+  const offset = new THREE.Vector3();
+  const orientation = new THREE.Quaternion();
+  const scale = new THREE.Vector3(1, 1, 1);
+  let x, y, z, w;
+
+  mesh = new THREE.InstancedMesh(geometry, material, instances);
+
+  for (let i = 0; i < instances; i++) {
+    // offsets
+
+    x = Math.random() * 100 - 50;
+    y = Math.random() * 100 - 50;
+    z = Math.random() * 100 - 50;
+
+    offset.set(x, y, z).normalize();
+    offset.multiplyScalar(5); // move out at least 5 units from center in current direction
+    offset.set(x + offset.x, y + offset.y, z + offset.z);
+
+    // orientations
+
+    x = Math.random() * 2 - 1;
+    y = Math.random() * 2 - 1;
+    z = Math.random() * 2 - 1;
+    w = Math.random() * 2 - 1;
+
+    orientation.set(x, y, z, w).normalize();
+
+    matrix.compose(offset, orientation, scale);
+
+    mesh.setMatrixAt(i, matrix);
+  }
+
+  scene.add(mesh);
+
+  renderer = new THREE.WebGLRenderer();
+  renderer.setPixelRatio(window.devicePixelRatio);
+  renderer.setSize(window.innerWidth, window.innerHeight);
+  renderer.setAnimationLoop(animate);
+  container.appendChild(renderer.domElement);
+
+  stats = new Stats();
+  container.appendChild(stats.dom);
+
+  window.addEventListener("resize", onWindowResize);
+}
+
+function onWindowResize() {
+  camera.aspect = window.innerWidth / window.innerHeight;
+  camera.updateProjectionMatrix();
+
+  renderer.setSize(window.innerWidth, window.innerHeight);
+}
+
+//
+
+function animate() {
+  const time = performance.now();
+
+  mesh.rotation.y = time * 0.00005;
+
+  const delta = (time - lastTime) / 5000;
+  tmpQ.set(moveQ.x * delta, moveQ.y * delta, moveQ.z * delta, 1).normalize();
+  tmpM.makeRotationFromQuaternion(tmpQ);
+
+  for (let i = 0, il = instances; i < il; i++) {
+    mesh.getMatrixAt(i, currentM);
+    currentM.multiply(tmpM);
+    mesh.setMatrixAt(i, currentM);
+  }
+
+  mesh.instanceMatrix.needsUpdate = true;
+  mesh.computeBoundingSphere();
+
+  lastTime = time;
+
+  renderer.render(scene, camera);
+
+  stats.update();
+}
@@ -0,0 +1,162 @@
+var Stats = function () {
+  var mode = 0;
+
+  var container = document.createElement("div");
+  container.style.cssText =
+    "position:fixed;top:0;left:0;cursor:pointer;opacity:0.9;z-index:10000";
+
+  //
+
+  function addPanel(panel) {
+    container.appendChild(panel.dom);
+    return panel;
+  }
+
+  function showPanel(id) {
+    for (var i = 0; i < container.children.length; i++) {
+      container.children[i].style.display = i === id ? "block" : "none";
+    }
+
+    mode = id;
+  }
+
+  var beginTime = (performance || Date).now(),
+    prevTime = beginTime,
+    frames = 0;
+
+  var fpsPanel = addPanel(new Stats.Panel("FPS", "#0ff", "#f00"));
+  var msPanel = addPanel(new Stats.Panel("MS", "#0f0", "#f00"));
+
+  if (self.performance && self.performance.memory) {
+    var memPanel = addPanel(new Stats.Panel("MB", "#f08", "#f00"));
+  }
+
+  showPanel(-1);
+
+  return {
+    REVISION: 16,
+
+    dom: container,
+
+    addPanel: addPanel,
+    showPanel: showPanel,
+
+    begin: function () {
+      beginTime = (performance || Date).now();
+    },
+
+    end: function () {
+      frames++;
+
+      var time = (performance || Date).now();
+
+      msPanel.update(time - beginTime, 200);
+
+      if (time >= prevTime + 1000) {
+        fpsPanel.update((frames * 1000) / (time - prevTime), 100);
+
+        prevTime = time;
+        frames = 0;
+
+        if (memPanel) {
+          var memory = performance.memory;
+          memPanel.update(
+            memory.usedJSHeapSize / 1048576,
+            memory.jsHeapSizeLimit / 1048576
+          );
+        }
+      }
+
+      return time;
+    },
+
+    update: function () {
+      beginTime = this.end();
+    },
+
+    // Backwards Compatibility
+
+    domElement: container,
+    setMode: showPanel,
+  };
+};
+
+Stats.Panel = function (name, fg, bg) {
+  var min = Infinity,
+    max = 0,
+    round = Math.round;
+  var PR = round(window.devicePixelRatio || 1);
+
+  var WIDTH = 80 * PR,
+    HEIGHT = 48 * PR,
+    TEXT_X = 3 * PR,
+    TEXT_Y = 2 * PR,
+    GRAPH_X = 3 * PR,
+    GRAPH_Y = 15 * PR,
+    GRAPH_WIDTH = 74 * PR,
+    GRAPH_HEIGHT = 30 * PR;
+
+  var canvas = document.createElement("canvas");
+  canvas.width = WIDTH;
+  canvas.height = HEIGHT;
+  canvas.style.cssText = "width:80px;height:48px";
+
+  var context = canvas.getContext("2d");
+  context.font = "bold " + 9 * PR + "px Helvetica,Arial,sans-serif";
+  context.textBaseline = "top";
+
+  context.fillStyle = bg;
+  context.fillRect(0, 0, WIDTH, HEIGHT);
+
+  context.fillStyle = fg;
+  context.fillText(name, TEXT_X, TEXT_Y);
+  context.fillRect(GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT);
+
+  context.fillStyle = bg;
+  context.globalAlpha = 0.9;
+  context.fillRect(GRAPH_X, GRAPH_Y, GRAPH_WIDTH, GRAPH_HEIGHT);
+
+  return {
+    dom: canvas,
+
+    update: function (value, maxValue) {
+      min = Math.min(min, value);
+      max = Math.max(max, value);
+
+      context.fillStyle = bg;
+      context.globalAlpha = 1;
+      context.fillRect(0, 0, WIDTH, GRAPH_Y);
+      context.fillStyle = fg;
+      context.fillText(
+        round(value) + " " + name + " (" + round(min) + "-" + round(max) + ")",
+        TEXT_X,
+        TEXT_Y
+      );
+
+      context.drawImage(
+        canvas,
+        GRAPH_X + PR,
+        GRAPH_Y,
+        GRAPH_WIDTH - PR,
+        GRAPH_HEIGHT,
+        GRAPH_X,
+        GRAPH_Y,
+        GRAPH_WIDTH - PR,
+        GRAPH_HEIGHT
+      );
+
+      context.fillRect(GRAPH_X + GRAPH_WIDTH - PR, GRAPH_Y, PR, GRAPH_HEIGHT);
+
+      context.fillStyle = bg;
+      context.globalAlpha = 0.9;
+      context.fillRect(
+        GRAPH_X + GRAPH_WIDTH - PR,
+        GRAPH_Y,
+        PR,
+        round((1 - value / maxValue) * GRAPH_HEIGHT)
+      );
+    },
+  };
+};
+
+export default Stats;
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html lang="en" data-bs-theme="dark">
+
+<head>
+  <meta charset="UTF-8" />
+  <title>Aperi'Solve</title>
+  <link rel="icon" type="image/svg+xml" href="/static/img/logo.svg" />
+  <link href="https://fonts.googleapis.com/css2?family=Fira+Code&display=swap" rel="stylesheet" />
+  <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css" rel="stylesheet">
+  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" />
+  <link href="/static/css/aperisolve.css" rel="stylesheet" />
+</head>
+
+<body class="text-light">
+  <div id="three-bg"></div>
+  <div class="container mt-5">
+    <a class="title_link" href="/">
+      <h1 class="mb-4"><img id="water-logo" src="/static/img/logo.svg" /> Aperi'Solve</h1>
+    </a>
+    {% block body_content %} {% endblock %}
+  </div>
+  <!-- Modal Structure -->
+  <div id="image-modal-container">
+    <img id="modal-image" src="" />
+  </div>
+  <script src="/static/js/aperisolve.js"></script>
+  <!-- Background -->
+  <script type="importmap">
+		{
+			"imports": {
+				"three": "./static/js/three.module.min.js",
+				"three/addons/": "./static/js/jsm/"
+			}
+		}
+	</script>
+  <script type="module" src="/static/js/background.js"></script>
+  {% block footer_content %} {% endblock %}
+  {% include "footer.html" %}
+</body>
+
+</html>
@@ -0,0 +1,409 @@
+{% extends 'base.html' %}
+{% block body_content %}
+<div id="cheatsheet">
+  <h1>Cheatsheet</h1>
+  <h2>Disclaimer</h2>
+  <div>
+    <div>
+      This cheatsheet is intended to guide CTF players in their research. This cheatsheet is not representative of
+      modern steganography/seganalysis techniques, and its content does not match with the creation of an interesting
+      challenges 😉.
+    </div>
+  </div>
+  <h2>Check file type / metadata</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>Check the file extension on the internet if you don't know it. Also check the file format.</li>
+        <li>Use the <span class='highlight'>file</span> command to check that the extension matches the file type. This
+          command is based on the <a href='https://en.wikipedia.org/wiki/List_of_file_signatures' target='_blank'
+            class='highlight'>Magic Bytes</a> at the beginning of the file, so it may return false positives.</li>
+      </ul>
+      <div class="command"><span class="highlight">$</span> file data.raw
+        <div class="clipboard" data-value='file data.raw'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>In case of unknown extension and file, inspect the hexadecimal structure of the file with an editor like <a
+            href='https://hexed.it/' target='_blank' class='highlight'>hexed.it</a> to identify the file structure.</li>
+        <li>Display the file's metadata with the <span class='highlight'>exiftool</span> command.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> exiftool data.raw
+        <div class="clipboard" data-value='file data.raw'></div>
+      </div>
+    </div>
+  </div>
+  <h2 id="filestruct">Modify the file structure</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>Modify the file structure with a hexadecimal editor like <a href='https://hexed.it/' target='_blank'
+            class='highlight'>hexed.it</a>. PNG chunks can be easily edited with <a
+            href='http://entropymine.com/jason/tweakpng/' target='_blank' class='highlight'>TweakPNG</a> (Windows or
+          Wine).</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/tweakpng.png" alt="TweakPNG" />
+      </div>
+      <ul class="fa-ul">
+        <li>Verify the checksums of the file. These are usually CRC32, some tools like <a
+            href='http://www.libpng.org/pub/png/apps/pngcheck.html' target='_blank' class='highlight'>PngCheck</a> or <a
+            href='https://github.com/sherlly/PCRT' target='_blank' class='highlight'>PCRT</a> are usefull to verify and
+          correct these checksums.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> pngcheck -c file.png<br />
+        <span class="highlight">$</span> PCRT.py -v -i file.png
+      </div>
+      <ul class="fa-ul">
+        <li>For many types of files (PNG, WAV, ...) the media size is contained in the headers. This size can then be
+          reduced to display only a part of the media (beginning of an image, beginning of a sound, ...).</li>
+      </ul>
+    </div>
+  </div>
+  <h2 id="rawdata">Raw data</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>It is possible to import a raw file into <a href='https://www.audacityteam.org/download/' target='_blank'
+            class='highlight'>Audacity</a> to listen to it as a soundtrack (File > Import > Raw Data).</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/audacity_raw.png" alt="Audacity" />
+      </div>
+      <ul class="fa-ul">
+        <li>Similarly, the <a href='https://www.gimp.org/downloads/' target='_blank' class='highlight'>GIMP</a> tool
+          allows image import from raw data (File > Open).</li>
+        <li>The <a href='http://binvis.io/' target='_blank' class='highlight'>BinVis.io</a> tool allows you to
+          graphically view binary files and can give hints as to the file type.</li>
+        <li>The <span class='highlight'>strings</span> command allows you to display the strings present in a file.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> strings -s file.raw<br />
+        <span class="highlight">$</span> strings -S file.raw<br />
+        <span class="highlight">$</span> strings -b file.raw<br />
+        <span class="highlight">$</span> strings -l file.raw<br />
+        <span class="highlight">$</span> strings -B file.raw<br />
+        <span class="highlight">$</span> strings -L file.raw
+      </div>
+    </div>
+  </div>
+  <h2 id="image">Image</h2>
+  <div>
+    <div>
+      <table class="cstable center">
+        <tr>
+          <th class="table_tl_none"></th>
+          <th>PNG</th>
+          <th>JPG/JPEG</th>
+          <th>BMP</th>
+        </tr>
+        <tr>
+          <td>Aperi'Solve</td>
+          <td class="hgreen">OK</td>
+          <td class="hgreen">OK</td>
+          <td class="hgreen">OK</td>
+        </tr>
+        <tr>
+          <td>Zsteg</td>
+          <td class="hgreen">OK</td>
+          <td class="hred">KO</td>
+          <td class="hgreen">OK</td>
+        </tr>
+        <tr>
+          <td>Steghide</td>
+          <td class="hred">KO</td>
+          <td class="hgreen">OK</td>
+          <td class="hgreen">OK</td>
+        </tr>
+        <tr>
+          <td>OutGuess</td>
+          <td class="hred">KO</td>
+          <td class="hgreen">OK</td>
+          <td class="hred">KO</td>
+        </tr>
+      </table>
+    </div>
+    <div>
+      <ul class="fa-ul">
+        <li>The robustness of steganography relies on the algorithm used and the knowledge of the cover medium. A search
+          of the original media allows us to make a comparison and identify the alterations made. A reverse search on <a
+            href='https://images.google.com/' target='_blank' class='highlight'>Google Image</a> or <a
+            href='https://yandex.com/images/' target='_blank' class='highlight'>Yandex Images</a> can find the original
+          media (be sure to check that the file size and type match).</li>
+        <li>The <a href='http://www.caesum.com/handbook/Stegsolve.jar' target='_blank' class='highlight'>Stegsolve</a>
+          tool allows you to perform operations on 2 images, and thus identify the differences between a cover medium
+          and a stegano medium using the XOR operation.</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/stegsolve_xor.png" alt="Stegsolve Xor" />
+        <img src="/static/img/cheatsheet/stegsolve_xor2.png" alt="Stegsolve Xor 2" />
+      </div>
+      <ul class="fa-ul">
+        <li>The <a href='https://github.com/zed-0xff/zsteg' target='_blank' class='highlight'>Zsteg</a> tool allows you
+          to extract messages and binaries encoded on different layers, such as the 2 green LSB.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> zsteg file.png 2b,g,lsb,xy<br />
+        <span class="highlight">$</span> zsteg file.png -E '1b,rgb,lsb'
+        <div class="clipboard" data-value='zsteg file.png'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>Sometimes, bit-layer analysis on the <a href='http://www.caesum.com/handbook/Stegsolve.jar' target='_blank'
+            class='highlight'>Stegsolve</a> tool (or Aperi'Solve) can highlight specific areas that have been altered.
+          Scripting may then be required to extract specific areas. The following python code retrieves an image as a
+          list of pixels: [(100,120,43), (230, 124, 110), ...]</li>
+      </ul>
+      <div class="command">
+        # pip install Pillow<br />
+        from PIL import Image<br />
+        stegano_image = Image.open('file.png')<br />
+        width, height = stegano_image.size<br />
+        pxs = list(stegano_image.getdata())<br />
+        print(pxs[:10])
+        <div class="clipboard" data-value='# pip install Pillow
+from PIL import Image
+stegano_image = Image.open("file.png")
+width, height = stegano_image.size
+pxs = list(stegano_image.getdata())
+print(pxs[:10])'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>Stegano mediums can rely on an algorithm using an encryption key. This is the case for <a
+            href='http://steghide.sourceforge.net/' target='_blank' class='highlight'>Steghide</a> and <a
+            href='https://github.com/resurrecting-open-source-projects/outguess' target='_blank'
+            class='highlight'>OutGuess</a>. The password can be the name of the file, a string of characters contained
+          in the file (<span class='highlight'>strings</span> & <span class='highlight'>exiftool</span>), or the object
+          represented by the image. In some cases, the password cannot be retrieved and a bruteforce must be performed.
+          The tool <a href='https://github.com/Paradoxis/StegCracker' target='_blank' class='highlight'>StegCracker</a>
+          and <a href='https://github.com/ R4yGM/stegbrute' target='_blank' class='highlight'>Stegbrute</a> allows
+          bruteforce of hidden secrets with <a href='http://steghide.sourceforge.net/' target='_blank'
+            class='highlight'>Steghide</a>.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> steghide extract -p "secret" -sf file.jpg<br />
+        <span class="highlight">$</span> stegcracker file.jpg /usr/share/wordlists/rockyou.txt
+      </div>
+    </div>
+  </div>
+  <h2 id="png">PNG (Portable Network Graphics)</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>Tools like <a href='http://steghide.sourceforge.net/' target='_blank' class='highlight'>Steghide</a> and <a
+            href='https://github.com/resurrecting-open-source-projects/outguess' target='_blank'
+            class='highlight'>OutGuess</a> does not work for PNG files. On the other hand, this type of file allows a
+          backup without compression, and therefore to hide messages on the LSBs. The tool <a
+            href='https://github.com/zed-0xff/zsteg' target='_blank' class='highlight'>Zsteg</a> presented above and
+          available on Aperi'Solve allows the extracting secrets from PNG files.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> zsteg file.png 2b,g,lsb,xy<br />
+        <span class="highlight">$</span> zsteg file.png -E '1b,rgb,lsb'
+        <div class="clipboard" data-value='zsteg file.png'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>PNG offers an <a href='https://en.wikipedia.org/wiki/APNG' target='_blank' class='highlight'>"APNG"</a>
+          extension allowing to have an animation of images like GIF files. It is possible that the visualization of the
+          PNG does not reflect all of its content (for example, a frame with a zero duration, or a very long first
+          frame). The tool <a href='https://ezgif.com/apng-maker' target='_blank' class='highlight'>APNG Maker</a>
+          allows you to view the different frames of an APNG file. A message can also be encoded on the durations of
+          each frame.</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="https://upload.wikimedia.org/wikipedia/commons/1/14/Animated_PNG_example_bouncing_beach_ball.png"
+          alt="APNG" />
+      </div>
+      <ul class="fa-ul">
+        <li>The tool <a href='http://entropymine.com/jason/tweakpng/' target='_blank' class='highlight'>TweakPNG</a>
+          presented earlier allows to perform several types of operations like recalculate checksums, reorder PNG
+          chunks, increase the visible size of the PNG or modify a header.</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/tweakpng.png" alt="TweakPNG" />
+      </div>
+    </div>
+  </div>
+  <h2 id="jpg">JPEG (Joint Photographic Experts Group)</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>The tool <a href='https://github.com/zed-0xff/zsteg' target='_blank' class='highlight'>Zsteg</a> does not
+          work on JPEG files (jpg, jpeg, ...) because the latter necessarily include a compression algorithm reducing
+          the quality of the image and altering the LSBs. In contrast, the tools <a
+            href='http://steghide.sourceforge.net/' target='_blank' class='highlight'>Steghide</a> and <a
+            href='https://github.com/resurrecting-open-source-projects/outguess' target='_blank'
+            class='highlight'>OutGuess</a> shown above are compatible with this file format.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> outguess -k secret file.jpg output.raw<br />
+        <span class="highlight">$</span> steghide extract -p "secret" -sf file.jpg
+      </div>
+    </div>
+  </div>
+  <h2 id="gif">GIF (Graphics Interchange Format)</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>GIFs are generally animated images whose format is generally poorly supported by steganalysis tools. In
+          addition, the image format generally offers a color palette not exceeding 256 colors, against 16 million for
+          PNG (excluding transparency). However, the tool <a href='https://ezgif.com/maker' target='_blank'
+            class='highlight'>GIF Maker</a> makes it easy to manipulate GIF files.</li>
+        <li>GIFs can embed images (frames) with zero duration. These will then not be viewable without an analysis of
+          each frame.</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/gif_maker.png" alt="GIF Maker" />
+      </div>
+      <ul class="fa-ul">
+        <li>A hidden message can be embedded over the duration of the frames (morse, ascii, binary, ...).</li>
+        <li><a href='https://ffmpeg.org/' target='_blank' class='highlight'>Ffmpeg</a> can be used to extract frames
+          from a GIF. Completeness of extracted frames cannot be guaranteed.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> ffmpeg -i file.gif -vsync 0 output/file%d.png
+        <div class="clipboard" data-value='ffmpeg -i file.gif -vsync 0 output/file%d.png'></div>
+      </div>
+    </div>
+  </div>
+  <h2 id="audio">Audio</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>The most common technique for sound files is based on the audio spectrum. Indeed, it is possible to draw a
+          visible message on the audio spectrum with tools like <a href='https://www.abc.se/~re/Coagula/Coagula.html'
+            target='_blank' class='highlight'>Coagula</a>. Then this spectrum can be analyzed using spectral analysis
+          tools like <a href='https://www.sonicvisualiser.org/' target='_blank' class='highlight'>Sonic Visualiser</a>,
+          <a href='https://www.audacityteam.org/' target='_blank' class='highlight'>Audacity</a> or the online tool <a
+            href='https://www.dcode.fr/spectral-analysis' target='_blank' class='highlight'>dcode</a>.</li>
+      </ul>
+      <div style="text-align: center;">
+        <img src="/static/img/cheatsheet/audacity_1.png" alt="Audacity spectrum" />
+      </div>
+      <br />Right-clicking the scale to zoom out and view the entire spectrum, or switch to logarithm mode, may be
+      required.
+      <div style="text-align: center;"><br />
+        <img src="/static/img/cheatsheet/audacity_2.png" alt="Audacity spectrum" />
+      </div>
+      <ul class="fa-ul">
+        <li>Inaudible frequencies can be used to hide messages. A spectral analysis beyond 20KHz and below 20Hz is
+          recommended, a message encoded in morse or binary can be hidden there.</li>
+        <li>Sounds are simple telecommunications signals that can be used for other purposes. Special encoding methods
+          can be used, such as <a href='https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling'
+            target='_blank' class='highlight'>DTMF Code</a> formerly used in telephony or <a
+            href='https://en.wikipedia.org/wiki/Slow-scan_television' target='_blank' class='highlight'>SSTV</a> used in
+          television for image transfer. These signals are encoded on audible frequencies but their interpretations
+          require special decoders. We will then opt for a <a href='http://dialabc.com/sound/detect/' target='_blank'
+            class='highlight'>DTMF decoder</a> for the first technique, and an SSTV decoder like <a
+            href='https://doc.ubuntu-fr.org/qsstv' target='_blank' class='highlight'>QSSTV</a> for the second one.</li>
+        <li>Just like PNG files, some sound files embed their theoretical sizes in their headers. This is particularly
+          the case for <a href='https://fr.wikipedia.org/wiki/Waveform_Audio_File_Format#En-t%C3%AAte_de_fichier_WAV'
+            target='_blank' class='highlight'>WAV files</a> whose DataSize block can be decreased or increased using a
+          hex editor.</li>
+        <li>The LSB technique can be used on certain audio files. It is then necessary to extract the LSBs from the
+          audio data; the <a href='https://github.com/ragibson/Steganography#WavSteg' target='_blank'
+            class='highlight'>WavSteg</a> tool allows you to perform this manipulation on WAV files.</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">$</span> stegolsb wavsteg -r -i file.wav -o output.txt -n 1 -b 1000
+        <div class="clipboard" data-value='stegolsb wavsteg -r -i file.wav -o output.txt -n 1 -b 1000'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>The tools <a href='http://steghide.sourceforge.net/' target='_blank' class='highlight'>Steghide</a> and <a
+            href='http://jpinsoft.net/deepsound/overview.aspx' target='_blank' class='highlight'>DeepSound</a> are
+          commonly used in CTF to hide messages. These can take a key as a parameter, so you will have to guess this key
+          from the available information (media, file name, challenge name, etc.) or by using a wordlist.</li>
+      </ul>
+      <div style="text-align: center;"><br />
+        <img src="/static/img/cheatsheet/DeepSound.png" alt="DeepSound" />
+      </div>
+    </div>
+  </div>
+  <h2 id="polyglot">Polyglot Files</h2>
+  <div>
+    <div>
+      This is a file type that is valid for different file formats. For example an image file which can therefore be
+      viewed and which is also a jar file (which can be executed). There are several types of polyglot file types:
+      <ul class="fa-ul">
+        <li>"Simple" polyglot: This is a simple concatenation of files;</li>
+        <li>"Parasitic" polyglot: This is a file that contains another type of file.</li>
+        <li>"Mille-feuilles" polyglot: The layers are alternated by controlling the internal structure of the file.</li>
+        <li>"Chimera" polyglot: The file has a body (data) and several heads. Since several formats use the same
+          algorithm to store data, such as Zlib's Deflate, the same block of data is used by different headers. (for
+          example, the pixels of an image). Several headers are present so that this image is visible via several
+          formats (jpg, png, ..), within the same file.</li>
+        <li>"Schizophrenic" files: This is a single type of file, but its contents are interpreted differently depending
+          on the tool that is running or accessing this file. These are usually PDF files (interpretation or not of
+          javascript) or Images (like the technique of <a href='https://carlmastrangelo.com/blog/gamma-steganography'
+            target='_blank' class='highlight '>Gamma</a>).</li>
+        <li>Angecryption : The result of an encryption or decryption of a file gives another valid file of the same type
+          or of a different type:</li>
+      </ul>
+      <div style="text-align: center;"><br />
+        <img src="/static/img/cheatsheet/Angecryption.png" alt="Angecryption" />
+      </div>
+      <ul class="fa-ul">
+        <li>Docx, jar, apk, pptx, odf... files are valid archives and can be decompressed. You must then check whether
+          the file in question can be opened with a tool other than the one associated with its extension. The <span
+            class='highlight'>file</span> command does not identify polyglot files.</li>
+      </ul>
+    </div>
+  </div>
+  <h2 id="text">Encoding and exotic languages</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li>ASCII text can be encoded in binary in blocks of <span class='highlight'>8 bits</span>, it is then easily
+          identifiable because each block corresponding to a letter begins with a 0. It is possible to remove this 0 ,
+          the blocks are then only <span class='highlight'>7 bits</span>. The text can also be coded on an integer of
+          type <span class='highlight'>long</span> (sometimes in a base other than base 10), for example the character
+          string “Hello world! encoded on a long type in base 10 can be decoded with the following python 2 code:</li>
+      </ul>
+      <div class="command">
+        <span class="highlight">python2></span> hex(22405534230753963835153736737L)[2:].strip('L').decode("hex")<br />
+        <span class="highlight">python2></span> "48656c6c6f20776f726c6421".decode("hex")
+        <div class="clipboard" data-value='hex(long_var)[2:].strip(&quot;L(&quot;).decode("hex")'></div>
+      </div>
+      <ul class="fa-ul">
+        <li>Tools like <a href='https://gchq.github.io/CyberChef/' target='_blank' class='highlight'>CyberChef</a> (and
+          the "magic" option) can help detect the encoding used and decode the hidden message. Sometimes a charset
+          change may be necessary (monoalphabetic substitution, or base change).</li>
+        <li>Exotic or esoteric languages are programming languages designed to be unique, difficult to program, or just
+          plain weird. Their design and their charsets can be particular, it is the case of the most found languages in
+          CTF like <a href='https://esolangs.org/wiki/Brainfuck' target='_blank' class='highlight'>BrainFuck</a>, <a
+            href='https://esolangs.org/wiki/Whitespace' target='_blank' class='highlight'>WhiteSpace</a>, <a
+            href='https://esolangs.org/wiki/Piet' target='_blank' class='highlight'>PIET</a> or <a
+            href='https://esolangs.org/wiki/Malbolge' target='_blank' class='highlight'>Malbolge</a>. The website <a
+            href='https://esolangs.org/wiki/Language_list' target='_blank' class='highlight'>EsoLang</a> references
+          these different languages and can be useful in your research.</li>
+      </ul>
+      <div class="command">
+        <span
+          class="highlight">brainfuck></span><br />++++++++++[&#x3E;+&#x3E;+++&#x3E;+++++++&#x3E;++++++++++&#x3C;&#x3C;&#x3C;&#x3C;-]&#x3E;&#x3E;&#x3E;++.&#x3E;+.+++++++..+++.&#x3C;&#x3C;++.&#x3E;&#x3E;++++++++.--------.+++.------.--------.&#x3C;&#x3C;+.
+        <br /><br /><span
+          class="highlight">malbolge></span><br />(&#x27;&#x26;%:9]!~}|z2Vxwv-,POqponl$Hjig%eB@@&#x3E;}=&#x3C;M:9wv6WsU2T|nm-,jcL(I&#x26;%$#&#x22;
+        &#x60;CB]V?Tx&#x3C;uVtT&#x60;Rpo3NlF.Jh++FdbCBA@?]!~|4XzyTT43Qsqq(Lnmkj&#x22;Fhg${z@&#x3E;
+      </div>
+      <div style="text-align: center;">
+        <a href='https://esolangs.org/wiki/Piet' target="_blank"><img src="/static/img/cheatsheet/piet.png"
+            alt="PIET" /></a>
+      </div><br />
+    </div>
+  </div>
+  <h2 id="more">To go further</h2>
+  <div>
+    <div>
+      <ul class="fa-ul">
+        <li><a href='https://www.aperikube.fr/cat/steg/' target='_blank' class='highlight'> Aperi'Kube's Blog -
+            Stéganography category</a></li>
+        <li><a href='https://ctftime.org/writeups' target='_blank' class='highlight'>CTF Time - Writeups (Stegano)</a>
+        </li>
+        <li><a href='http://corkami.github.io/' target='_blank' class='highlight'>Corkami</a></li>
+        <li><a href='https://www.root-me.org/en/Challenges/Steganography/' target='_blank' class='highlight'>Root-Me -
+            Steganography</a></li>
+        <li><a href='https://en.wikipedia.org/wiki/Autostereogram' target='_blank' class='highlight'>Stereogram</a></li>
+      </ul>
+    </div>
+  </div>
+</div>
+{% endblock %}
@@ -0,0 +1,18 @@
+<footer class="d-flex justify-content-center gap-4 my-4">
+    <div>
+        <a href="/faq" title="FAQ" class="text-light text-decoration-none">
+            <i class="fa-regular fa-circle-question"></i>
+        </a>
+    </div>
+    <div>
+        <a href="https://github.com/Zeecka/AperiSolve" target="_blank" title="GitHub"
+            class="text-light text-decoration-none">
+            <i class="fa-brands fa-github"></i>
+        </a>
+    </div>
+    <div>
+        <a href="https://x.com/Zeecka_" target="_blank" title="Twitter" class="text-light text-decoration-none">
+            <i class="fa-brands fa-x-twitter"></i>
+        </a>
+    </div>
+</footer>
@@ -0,0 +1,38 @@
+{% extends 'base.html' %}
+{% block body_content %}
+<form id="upload-form" class="card p-4" method="POST" enctype="multipart/form-data">
+  <div class="mb-3">
+    <div>
+      <h2>What is this ?</h2>
+      <p>Aperi'Solve is an online platform which performs layer analysis on image. The platform also uses zsteg,
+        steghide, outguess, exiftool, binwalk, foremost and strings for deeper steganography analysis. The platform
+        supports the following images format: .png, .jpg, .gif, .bmp, .jpeg, .jfif, .jpe, .tiff...</p>
+    </div>
+    <div id="drop-zone" class="border border-secondary rounded p-4 text-center mb-3">
+      <p id="drag-msg">📂 Drag and drop an image here or click to select</p>
+      <input type="file" id="image" name="image" accept="image/*" hidden required />
+      <button type="button" class="btn btn-secondary mt-2" id="browse-btn">
+        Choose an image
+      </button>
+    </div>
+  </div>
+  <div class="mb-3">
+    <label for="password" class="form-label">Password (optional)</label>
+    <input class="form-control" type="text" name="password" id="password" />
+  </div>
+  <div class="form-check mb-3">
+    <input class="form-check-input" type="checkbox" id="deep" />
+    <label class="form-check-label" for="deep">Deep analysis</label>
+  </div>
+  <button type="submit" class="btn btn-primary">Submit</button>
+  <div class="progress mt-3 d-none" id="progress-container">
+    <div class="progress-bar" id="progress-bar" role="progress-bar" style="width: 0%">
+      0%
+    </div>
+  </div>
+</form>
+<div id="result" class="mt-5">
+  <div id="result-infos" class="mb-3"></div>
+  <div id="result-analyzers" class="mb-3"></div>
+</div>
+{% endblock %}
@@ -0,0 +1,12 @@
+{% extends 'base.html' %}
+{% block body_content %}
+<div id="result" class="mt-5">
+  <div id="result-infos" class="mb-3"></div>
+  <div id="result-analyzers" class="mb-3"></div>
+</div>
+{% endblock %}
+{% block footer_content %}
+<script>
+  pollStatus("{{ hash_val }}");
+</script>
+{% endblock %}
@@ -0,0 +1,10 @@
+{% extends 'base.html' %}
+{% block body_content %}
+<div id="result" class="mt-5">
+  {% for img in images %}<!--
+    --><div class="browse-images">
+      <a href="{{ img.link }}" target="_blank"><img src="{{ img.file }}"/></a>
+    </div><!--
+  -->{% endfor %}
+</div>
+{% endblock %}
@@ -0,0 +1,76 @@
+"""Asynchronous worker for analyzing image submissions."""
+
+import threading
+from pathlib import Path
+from typing import Any
+
+from .analyzers.binwalk import analyze_binwalk
+from .analyzers.decomposer import analyze_decomposer
+from .analyzers.exiftool import analyze_exiftool
+from .analyzers.foremost import analyze_foremost
+from .analyzers.outguess import analyze_outguess
+from .analyzers.steghide import analyze_steghide
+from .analyzers.strings import analyze_strings
+from .analyzers.zsteg import analyze_zsteg
+from .app import app, db
+from .config import RESULT_FOLDER
+from .models import Image, Submission
+
+
+def analyze_image(submission_hash: str) -> None:
+    """Analyze an image submission in separate threads."""
+    with app.app_context():
+        submission: Submission = Submission.query.get(submission_hash)  # type: ignore
+        image = Image.query.get_or_404(submission.image_hash)  # type: ignore
+
+        if not submission or not image:  # No submission found
+            return
+
+        submission.status = "running"  # type: ignore
+        db.session.commit()
+
+        try:
+            img_path: Path = Path(image.file)
+            result_path: Path = RESULT_FOLDER / str(image.hash) / str(submission.hash)
+            result_path.mkdir(parents=True, exist_ok=True)
+
+            threads: list[threading.Thread] = []
+
+            def run_analyzer(analyzer_func: Any, *args: Any) -> None:
+                """Run an analyzer function in a separate thread."""
+                try:
+                    analyzer_func(*args)
+                except Exception as e:
+                    print(f"Error in {analyzer_func.__name__}: {e}")
+
+            analyzers = [
+                (analyze_binwalk, img_path, result_path),
+                (analyze_decomposer, img_path, result_path),
+                (analyze_exiftool, img_path, result_path),
+                (analyze_foremost, img_path, result_path),
+                (analyze_strings, img_path, result_path),
+                (analyze_steghide, img_path, result_path, submission.password),
+                (analyze_zsteg, img_path, result_path),
+            ]
+
+            # Deep analysis only
+            if submission.deep_analysis:
+                analyzers.extend(
+                    [
+                        (analyze_outguess, img_path, result_path),
+                    ]
+                )
+
+            for analyzer in analyzers:
+                thread = threading.Thread(target=run_analyzer, args=analyzer)
+                threads.append(thread)
+                thread.start()
+
+            for thread in threads:
+                thread.join()
+
+            submission.status = "completed"
+        except Exception:
+            submission.status = "error"
+        finally:
+            db.session.commit()
@@ -0,0 +1,6 @@
+"""Aperi'Solve WSGI runner."""
+
+from .app import app as application
+
+if __name__ == "__main__":
+    application.run()
@@ -0,0 +1,76 @@
+services:
+  web:
+    #image: ghcr.io/zeecka/aperisolve:latest
+    build: .
+    container_name: aperisolve-web
+    restart: always
+    command: ["flask", "--app", "aperisolve.app", "run", "--host=0.0.0.0", "--port=5000"]
+    ports:
+      - "5000:5000"
+    volumes:
+      - ./aperisolve:/aperisolve
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_started
+      worker:
+        condition: service_started
+    env_file:
+      - .env
+    environment:
+      - FLASK_DEBUG=true
+      - FLASK_ENV=development
+
+  worker:
+    #image: ghcr.io/zeecka/aperisolve:latest
+    build: .
+    container_name: aperisolve-worker
+    restart: always
+    command: rq worker default --url redis://redis:6379/0
+    volumes:
+      - ./aperisolve:/aperisolve
+    depends_on:
+      - redis
+      - postgres
+    env_file:
+      - .env
+    environment:
+      - FLASK_DEBUG=true
+      - FLASK_ENV=development
+
+  redis:
+    image: redis:7
+    container_name: redis
+    restart: always
+    env_file:
+      - .env
+
+  postgres:
+    image: postgres:14
+    container_name: postgres
+    restart: always
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U aperiuser -d aperisolve"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    env_file:
+      - .env
+
+
+  rqdashboard:
+    image: eoranged/rq-dashboard
+    container_name: rq-dashboard
+    restart: always
+    ports:
+      - "9181:9181"
+    depends_on:
+      - redis
+    env_file:
+      - .env
+      
+volumes:
+  pgdata:
@@ -0,0 +1,69 @@
+services:
+  web:
+    image: ghcr.io/zeecka/aperisolve:latest
+    #build: .
+    container_name: aperisolve-web
+    restart: always
+    ports:
+      - "5000:5000"
+    volumes:
+      - apresults:/aperisolve/results
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_started
+      worker:
+        condition: service_started
+    env_file:
+      - .env
+
+  worker:
+    image: ghcr.io/zeecka/aperisolve:latest
+    #build: .
+    container_name: aperisolve-worker
+    restart: always
+    command: rq worker default --url redis://redis:6379/0
+    volumes:
+      - apresults:/aperisolve/results
+    depends_on:
+      - redis
+      - postgres
+    env_file:
+      - .env
+
+  postgres:
+    image: postgres:14
+    container_name: postgres
+    restart: always
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U aperiuser -d aperisolve"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    env_file:
+      - .env
+
+  redis:
+    image: redis:7
+    container_name: redis
+    restart: always
+    env_file:
+      - .env
+
+  rqdashboard:
+    image: eoranged/rq-dashboard
+    container_name: rq-dashboard
+    restart: always
+    ports:
+      - "9181:9181"
+    depends_on:
+      - redis
+    env_file:
+      - .env
+      
+volumes:
+  apresults:
+  pgdata: