Merge pull request #108 from Zeecka/bump_prod

Bump prod

Dockerfile

@@ -19,6 +19,10 @@ RUN apt-get update && apt-get install -y \
 
 COPY aperisolve/ /aperisolve/
 
+RUN mkdir -p /data
+
 RUN pip install --no-cache-dir -r /aperisolve/requirements.txt
 
-CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:5000", "aperisolve.wsgi:application"]
+ENV PYTHONUNBUFFERED=1
+
+CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:5000", "--access-logfile", "-", "--error-logfile", "-", "--log-level", "info", "--capture-output", "aperisolve.wsgi:application"]

README.md

@@ -6,101 +6,195 @@
 [![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/main/examples/screenshot.png"/></a></p>
+<p align="center">
+  <a href="https://www.aperisolve.com">
+    <img src="https://raw.githubusercontent.com/Zeecka/AperiSolve/main/examples/screenshot.png" alt="Aperi'Solve screenshot" />
+  </a>
+</p>
 
-<b>Try it now: https://www.aperisolve.com</b>
+Try it now: **https://www.aperisolve.com**
 
-<b> Support Aperi'Solve:</b>
+Support Aperi'Solve:
 
 <a href="https://buymeacoffee.com/aperisolve">
   <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" height="40" />
 </a>
 
-## 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.
+Aperi'Solve is an open-source steganalysis web platform that performs automated analysis on images to detect and extract hidden data using common steganography tools and techniques.
 
-<p align="center"><a href="https://www.aperisolve.com"><img src="https://i.imgur.com/qiR1mlT.gif"/></a></p>
+Table of contents
+- [Key features](#key-features)
+- [Quick start (Docker)](#quick-start-docker)
+- [Development](#development)
+- [Adding a new analyzer](#adding-a-new-analyzer)
+- [Configuration & environment variables](#configuration--environment-variables)
+- [Architecture](#architecture)
+- [Troubleshooting & tips](#troubleshooting--tips)
+- [Roadmap](#roadmap)
+- [Contributing](#contributing)
 
-### Why Aperi'Solve?
+## Key features
 
-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 were note able to install tools like `zsteg` (ruby gem) properly.
+- Visualize each bit layer (LSB and other layers) per image channel (R/G/B/Alpha).
+- Browse and download each bit-layer image.
+- Integrates and displays outputs from:
+  - zsteg (LSB text/data extraction)
+  - steghide (extraction with password)
+  - outguess (extraction with password)
+  - exiftool (metadata and geolocation)
+  - binwalk (embedded archives)
+  - foremost (carved files)
+  - pngcheck
+  - strings
+- Worker queue architecture for offloading heavy/slow analyzers (Redis + background workers).
+- Results stored for later browsing and download.
 
-### Features
+## Quick start (Docker)
 
-Aperi'Solve is based on Python3 with Flask and PIL module, the platform supports the most common image formats like`.png`, `.jpg`, `.gif`, `.bmp`, `.jpeg`, `.jfif`, `.jpe`, `.tiff`...
+In case you want to host your own version of https://www.aperisolve.com/.
 
-The platform allows you to:
+Recommended: Docker + Docker Compose.
-- **Visualize each bit layer** of each channel for a given image (ie. LSB of Red channel).
-- **Browse** and **Download each bit layer image**.
-- **Visualise `zsteg` information** such as text encoded on LSB
-- **Download `steghide` files** using a defined password
-- **Download `outguess` files** using a defined password
-- **Visualise `exiftool` information** such as geolocation or author
-- **Visualise `binwalk` information**
-- **Download `binwalk` files** such as ZIP file in PNG headers
-- **Download `foremost` files** such as ZIP file in PNG headers
-- **Visualise `pngcheck` output**
-- **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:
 
+Clone and start the full stack (production-like):
 ```bash
 git clone https://github.com/Zeecka/AperiSolve.git
-cd aperisolve
+cd AperiSolve
 docker compose up -d
 ```
 
-> Default will run on http://localhost:5000/
+Default: http://localhost:5000/
 
 ## Development
-
+Development compose:
-Aperi'Solve platform is a *Flask* web service (python 3.11+) with python workers performing analysis.
-Jobs are stacked in a redis-queue, and image information is stored in a postgresql database.
-All services run inside Docker containers.
-
-### Adding new analyzer
-
-Adding new analyzer is easy.
-
-1. Copy and adapt the [template_analyzer.py](aperisolve/analyzers/template_analyzer.py) file with your 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 the `analyzers` variable, 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 useful commands.
-
 ```bash
-docker compose down -v  # Remove the volume containings results
+# development environment (hot reload and local volumes)
-docker compose -f compose.dev.yml up  # Start application in developpement mode
+docker compose -f compose.dev.yml up --build
-rm -rf aperisolve/results  # Remove results from development mode
-docker exec -it postgres psql -U aperiuser -d aperisolve  # Get postgresql shell
-docker exec -it aperisolve-web bash # Get a shell inside the running web app
 ```
 
-> Note, if you used [compose.dev.yml](compose.dev.yml), you must remove "results" when switching to [production Docker](compose.yml) setup.
+Useful commands:
+```bash
+# Stop and remove containers, networks and volumes (results are stored in a volume)
+docker compose down -v
 
-### Code quality
+# Enter web container shell
+docker exec -it aperisolve-web bash
 
-Python code follows the following linters:
+# Enter Postgres shell (from host)
+docker exec -it postgres psql -U aperiuser -d aperisolve
+```
 
+Note: If switching between dev and production compose files, remove the `results` directory or mounted volume to avoid conflicts:
+```bash
+rm -rf aperisolve/results
+```
+### Adding a new analyzer
+
+Adding a custom analyzer is straightforward:
+
+1. Create your analyzer file:
+   - Copy `aperisolve/analyzers/template_analyzer.py` -> `aperisolve/analyzers/myanalyzer.py`
+   - Implement function signature similar to:
+   ```python
+   # aperisolve/analyzers/myanalyzer.py
+   def analyze_myanalyzer(image_path: str, results_dir: str) -> dict:
+       """
+       Perform analysis on image located at image_path.
+       Produce outputs in results_dir and return a result dict (json-serializable).
+       """
+       # your analysis logic here
+       return {"name": "myanalyzer", "status": "ok", "outputs": [...]}
+   ```
+
+2. Register the analyzer in the worker pipeline:
+   - Edit `aperisolve/workers.py`:
+   ```python
+   # import
+   from .analyzers.myanalyzer import analyze_myanalyzer
+
+   # add to analyzers list (preserve the order)
+   analyzers = [
+       analyze_zsteg,
+       analyze_steghide,
+       # ...
+       analyze_myanalyzer,
+   ]
+   ```
+
+3. Add your analyzer to the UI order:
+   - Edit `aperisolve/static/js/aperisolve.js` and append `myanalyzer` to `TOOL_ORDER` so it appears in the frontend.
+
+4. Test locally: run the worker and submit jobs to ensure outputs are produced and displayed.
+
+Tips:
+- Keep analyzers idempotent and write outputs to the provided `results_dir`.
+- Return structured JSON so the frontend can render links/downloads automatically.
+
+## Configuration & environment variables
+
+Typical services:
+- Web app (Flask)
+- Workers (Python)
+- Redis (RQ)
+- PostgreSQL
+
+Main environment variables (examples):
+- DATABASE_URL=postgresql://aperiuser:password@postgres:5432/aperisolve
+- REDIS_URL=redis://redis:6379/0
+- SECRET_KEY=change_me
+- FLASK_ENV=production/development
+
+If using Docker Compose, defaults are set in the compose files. For production deployments, set secure secrets via your orchestrator or environment.
+
+## Architecture
+
+- Flask web framework
+- Background workers that run analyzers (queue via Redis)
+- PostgreSQL stores image metadata and job statuses
+- Docker-based deployment for isolation of analyzers and services
+
+This separation keeps heavy tools (binwalk, foremost, zsteg, etc.) isolated and avoids blocking the web worker.
+
+## Troubleshooting & tips
+
+- If analyzers don't produce output, check worker logs:
+  ```bash
+  docker compose logs -f aperisolve-worker
+  ```
+- To force re-analysis, remove results for the image (both file and in database) and re-submit the job.
+- Ensure system packages needed by native tools (binwalk, foremost) are available in the analyzer containers or host image.
+
+## Roadmap
+
+- [ ] zsteg: full extraction (--all) and download of discovered files (mp3, etc.)
+- [ ] Mobile-friendly UI / test on mobile
+- [ ] i18n (internationalization)
+- [ ] Rootless / unprivileged analyzers
+- [ ] Improve analyzer sandboxing (e.g., per-analyzer containers)
+
+## Contributing
+
+Contributions are welcome! Please:
+1. Fork the repository
+2. Create a feature branch
+3. Open a pull request describing your change
+
+Please follow the code style and run linters before submitting.
+The project adheres to:
 - Black
 - Flake8 (ignoring E203, E501, W503)
 - Pylint (ignoring W0718, R0903, R0801)
 - Mypy (ignoring unused-awaitable)
 
-GitHub CI will alert in case of failure.
+CI will run these checks on each PR.
 
-## Roadmap
+## Security
 
-- [ ] Zsteg extract / --all --> **Download `zsteg` files** such as mp3 encoded on LSB
+- If you discover a security issue, please report it privately to the repository owner instead of opening a public issue.
-- [ ] Test on mobile
+
-- [ ] i18n
+## Credits
-- [ ] Rootless analyzers ?
+
+Acknowledgements:
+- Thanks to contributors and the open-source community for the tools integrated (zsteg, steghide, binwalk, foremost, exiftool).

aperisolve/analyzers/foremost.py

@@ -24,7 +24,7 @@ def analyze_foremost(input_img: Path, output_dir: Path) -> None:
             timeout=MAX_PENDING_TIME,
         )
         # Note: foremost use stderr as standard output for results :o)
-        # So we can't use it as error dectection :
+        # So we can't use it as error detection :
         # stderr += data.stderr
 
         # Zip extracted files

aperisolve/analyzers/image_resize.py

@@ -1,165 +1,117 @@
 """Image size bruteforcer for common PNG sizes."""
 
-import zlib
 from pathlib import Path
-from .utils import update_data
+from typing import Any, List
 
-# Full list of expected sizes
+from ..app import app
-EXPECTED_SIZES = [
+from ..models import IHDR
-    # -------------------------
+from .utils import PNG, update_data
-    # ICONS (Square)
-    # -------------------------
-    (16, 16),
-    (20, 20),
-    (24, 24),
-    (28, 28),
-    (32, 32),
-    (48, 48),
-    (64, 64),
-    (72, 72),
-    (96, 96),
-    (128, 128),
-    (192, 192),
-    (256, 256),
-    (384, 384),
-    (512, 512),
-    (768, 768),
-    (1024, 1024),
-    (1536, 1536),
-    (2048, 2048),
-    (4096, 4096),
-    # -------------------------
-    # 1:1 Square (General)
-    # -------------------------
-    (300, 300),
-    (500, 500),
-    (800, 800),
-    (1000, 1000),
-    (1500, 1500),
-    (2000, 2000),
-    (2500, 2500),
-    (3000, 3000),
-    # -------------------------
-    # 4:3 Aspect (Classic Screens)
-    # -------------------------
-    (320, 240),
-    (640, 480),
-    (800, 600),
-    (960, 720),
-    (1024, 768),
-    (1280, 960),
-    (1600, 1200),
-    (2048, 1536),
-    (2560, 1920),
-    (3200, 2400),
-    (4096, 3072),
-    # -------------------------
-    # 3:2 Aspect (Photography)
-    # -------------------------
-    (600, 400),
-    (900, 600),
-    (1200, 800),
-    (1500, 1000),
-    (1800, 1200),
-    (2400, 1600),
-    (3000, 2000),
-    (3600, 2400),
-    (4500, 3000),
-    (6000, 4000),
-    # -------------------------
-    # 16:9 Aspect (Video / Web)
-    # -------------------------
-    (426, 240),
-    (640, 360),
-    (854, 480),
-    (960, 540),
-    (1280, 720),
-    (1366, 768),
-    (1600, 900),
-    (1920, 1080),
-    (2560, 1440),
-    (3200, 1800),
-    (3440, 1935),
-    (3840, 2160),
-    (5120, 2880),
-    (7680, 4320),
-    (10240, 5760),
-    # -------------------------
-    # 16:10 Aspect (Laptops)
-    # -------------------------
-    (1280, 800),
-    (1440, 900),
-    (1680, 1050),
-    (1920, 1200),
-    (2560, 1600),
-    (2880, 1800),
-    (3840, 2400),
-    (5120, 3200),
-    # -------------------------
-    # Mobile Portrait (9:16)
-    # -------------------------
-    (720, 1280),
-    (1080, 1920),
-    (1440, 2560),
-    (2160, 3840),
-    (1440, 2960),
-    (1080, 2400),
-    (1170, 2532),
-    (1284, 2778),
-    (1290, 2796),
-    # -------------------------
-    # Social Media Sizes
-    # -------------------------
-    # Instagram
-    (1080, 1080),
-    (1080, 1350),
-    (1080, 1920),
-    # Facebook
-    (1200, 628),
-    (1200, 1200),
-    # Twitter/X
-    (1200, 675),
-    (1500, 500),
-    # YouTube Thumbnails
-    (1280, 720),
-    (1920, 1080),
-    # -------------------------
-    # Banners / Headers
-    # -------------------------
-    (1600, 500),
-    (1920, 500),
-    (2560, 700),
-    (3000, 1000),
-    (3840, 1200),
-    # -------------------------
-    # Print-like Digital Sizes
-    # -------------------------
-    (2550, 3300),  # Letter @ 300 DPI
-    (2480, 3508),  # A4 @ 300 DPI
-    (3508, 4961),  # A3 @ 300 DPI
-    (4961, 7016),  # A2 @ 300 DPI
-    (7016, 9933),  # A1 @ 300 DPI
-]
 
 
-def calc_checksum(
+def write_recovered_png(
-    header_chunk: bytearray, width_bytes: bytearray, height_bytes: bytearray
+    png_bytes: bytearray,
-) -> bytearray:
+    width: int,
+    height: int,
+    output_path: Path,
+) -> None:
     """
-    Calculates the CRC32 of the IHDR chunk with new dimensions.
+    Rebuilds a PNG by patching IHDR width/height and writes it to disk.
-    header_chunk: The full IHDR chunk (Type + Data).
     """
-    # Reconstruct IHDR: [Type(4)] + [New Width(4)] + [New Height(4)] + [Rest of Data(5)]
+    height_bytes = height.to_bytes(4, byteorder="big")
-    new_header = header_chunk[:4] + width_bytes + height_bytes + header_chunk[12:]
+    width_bytes = width.to_bytes(4, byteorder="big")
 
-    # Calculate CRC and return as 4 bytes (Big Endian)
+    full_png_data = (
-    return bytearray((zlib.crc32(new_header) & 0xFFFFFFFF).to_bytes(4, byteorder="big"))
+        png_bytes[:16]  # Splicing: [Start...IHDR+4] + [W] + [H] + [IHDR+12...End]
+        + width_bytes
+        + height_bytes
+        + png_bytes[24:]
+    )
+
+    with output_path.open("wb") as out_f:
+        out_f.write(full_png_data)
+
+
+def lookup_crc(png: PNG) -> List[PNG]:
+    """
+    Look up PNG images in the database by their CRC value.
+
+    Args:
+        png (PNG): A PNG object containing the CRC value to search for.
+
+    Returns:
+        List[PNG]: A list of PNG objects with matching CRC values, reconstructed from their packed
+                   representations.
+    """
+    with app.app_context():
+        imgs = IHDR.query.filter_by(crc=png.crc).all()
+        results = []
+        for img in imgs:
+            packed = img.packed
+            results.append(PNG.from_packed(packed, crc=png.crc))
+    return results
+
+
+def search_height_crc(png: PNG) -> List[PNG]:
+    """
+    Search for PNG images with matching CRC by iterating through possible heights.
+
+    This function attempts to find alternative PNG configurations that produce the same
+    CRC checksum as the input PNG by systematically varying the height parameter while
+    keeping all other properties constant.
+
+    Args:
+        png (PNG): The reference PNG object whose CRC checksum will be matched.
+
+    Returns:
+        List[PNG]: A list of PNG objects with matching CRC values. Returns an empty list
+                   if no matches are found.
+
+    Note:
+        The function iterates through heights from 100 to 3500 (inclusive).
+        This may be computationally expensive for large ranges.
+    """
+    results = []
+    for height in range(100, 3501):
+        candidate = PNG(
+            size=(png.width, height),
+            bit_depth=png.bit_depth,
+            color_type=png.color_type,
+            interlace=png.interlace,
+        )
+        if candidate.crc == png.crc:
+            results.append(candidate)
+    return results
 
 
 def analyze_image_resize(input_img: Path, output_dir: Path) -> None:
     """
-    Analyze an image submission using python-based resize bruteforce.
+    Analyze a PNG image and recover resized versions based on CRC matching.
-    Attempts to recover PNGs with modified resolutions but valid CRCs.
+
+    This function attempts to find matching image dimensions for a given PNG file
+    by looking up its CRC (Cyclic Redundancy Check) in a database. If matches are
+    found, it recovers and saves PNG images with the matched dimensions.
+
+    Args:
+        input_img (Path): Path to the input PNG image file to analyze.
+        output_dir (Path): Path to the directory where recovered PNG images will be saved.
+
+    Returns:
+        None
+
+    Raises:
+        Handles exceptions gracefully by updating output data with error status.
+
+    Side Effects:
+        - Creates output directory if it doesn't exist.
+        - Saves recovered PNG images to the output directory.
+        - Updates data in the output directory with analysis results via update_data().
+
+    Notes:
+        - If the PNG has invalid structure or IHDR chunk is not first, an error is logged.
+        - The function performs a two-step lookup: first by CRC, then by height/CRC if no matches
+          found.
+        - Recovered images are named as "recovered_{width}x{height}.png".
+        - Analysis results (logs, status, and image URLs) are persisted via update_data().
     """
 
     # 1. Setup Paths
@@ -168,81 +120,64 @@ def analyze_image_resize(input_img: Path, output_dir: Path) -> None:
 
     # 3. Initialize Logs
     logs = []
-    recovered_image = None
 
     try:
         with input_img.open("rb") as image:
-            f = image.read()
+            img_bytes = bytearray(image.read())
+            try:
+                png = PNG.from_bytearray(img_bytes)
+            except ValueError:
+                png = None
 
-        b = bytearray(f)
+        if png is None:
-
+            logs.append(
-        # Find IHDR start
+                "Failure: IHDR chunk is not the first chunk, or PNG has invalid structure."
-        ihdr = b.find(b"\x49\x48\x44\x52")
+            )
-        if ihdr == -1:
-            logs.append("Failure: PNG header (IHDR) not found.")
             update_data(
                 output_dir,
-                {"image_resize": {"status": "error", "error": "PNG header not found."}},
+                {
+                    "image_resize": {
+                        "status": "error",
+                        "error": "IHDR chunk is not the first chunk, or PNG has invalid structure.",
+                    }
+                },
             )
             return
 
-        # Calculate Chunk Length (The 4 bytes BEFORE IHDR tag)
+        logs.append(f"Target CRC found: 0x{png.crc:08x}")
-        chunk_length = int.from_bytes((b[ihdr - 4 : ihdr]), byteorder="big") + 4
 
-        # Extract Target CRC (The 4 bytes AFTER the chunk data)
+        saved_img_urls = []
-        target_crc = b[ihdr + chunk_length : ihdr + chunk_length + 4]
-
-        # Isolate the header chunk (Type + Data)
-        header_chunk = b[ihdr : ihdr + chunk_length]
-
-        logs.append(f"Target CRC found: 0x{target_crc.hex()}")
-
-        match_found = False
-
-        # Brute-force Loop
-        for size in EXPECTED_SIZES:
-            width, height = size
-
-            # Convert dimensions to 4-byte Big Endian arrays
-            width_bytes = bytearray(width.to_bytes(4, byteorder="big"))
-            height_bytes = bytearray(height.to_bytes(4, byteorder="big"))
-
-            # Check if this size matches the file's CRC
-            if target_crc == calc_checksum(header_chunk, width_bytes, height_bytes):
-                match_found = True
-                logs.append(f"Success: Match found! Dimensions: {width}x{height}")
-
-                # Create Output Filename
-                img_name = f"recovered_{width}x{height}.png"
 
+        db_matches = lookup_crc(png)
+        if not db_matches:
+            db_matches = search_height_crc(png)
+        if not db_matches:
+            logs.append("Failure: No matching dimensions found.")
+        else:
             # Create parent directories if they don't exist
             output_dir.mkdir(parents=True, exist_ok=True)
-                output_path = output_dir / img_name
 
-                # Splicing: [Start...IHDR+4] + [W] + [H] + [IHDR+12...End]
+            # Iterate through ALL candidates found
-                full_png_data = (
+            for im_match in db_matches:
-                    b[: ihdr + 4] + width_bytes + height_bytes + b[ihdr + 12 :]
+                img_name = f"recovered_{im_match.width}x{im_match.height}.png"
+                output_path = output_dir / img_name
+                write_recovered_png(
+                    img_bytes, im_match.width, im_match.height, output_path
                 )
 
-                # Write the recovered file to disk
+                logs.append(f"Image saved: {img_name}")
-                with output_path.open("wb") as out_f:
+                # Append the formatted URL to our list
-                    out_f.write(full_png_data)
+                saved_img_urls.append("/image/" + str(Path(output_dir.name) / img_name))
-
-                recovered_image = Path(output_dir.name) / img_name
-                break  # Stop looking after finding the match
-
-        if not match_found:
-            logs.append("Failure: No matching dimensions found.")
 
         # 4. Final Data Update
-        output_data = {
+        output_data: dict[str, Any] = {
-            "image_resize": {  # Key name must match your module name in AperiSolve
+            "image_resize": {
                 "status": "ok",
                 "output": logs,
+                "png_images": saved_img_urls,
             }
         }
-        if recovered_image:
+
-            output_data["image_resize"]["image"] = "/image/" + str(recovered_image)
         update_data(output_dir, output_data)
 
     except Exception as e:

aperisolve/analyzers/outguess.py

@@ -11,7 +11,7 @@ from .utils import MAX_PENDING_TIME, update_data
 def analyze_outguess(
     input_img: Path, output_dir: Path, password: Optional[str] = None
 ) -> None:
-    """Analyze an image submission using stehide."""
+    """Analyze an image submission using outguess."""
 
     image_name = input_img.name
     try:

aperisolve/analyzers/pngcheck.py

@@ -7,7 +7,7 @@ from .utils import MAX_PENDING_TIME, update_data
 
 
 def analyze_pngcheck(input_img: Path, output_dir: Path) -> None:
-    """Analyze an image submission using strings."""
+    """Analyze an image submission using pngcheck."""
 
     try:
         data = subprocess.run(
@@ -24,15 +24,15 @@ def analyze_pngcheck(input_img: Path, output_dir: Path) -> None:
         #     )
         #     return
 
-        data_strings = data.stdout.split("\n") if data else []
+        data_pngcheck = data.stdout.split("\n") if data else []
-        data_strings = [s for s in data_strings if s]
+        data_pngcheck = [s for s in data_pngcheck if s]
 
         update_data(
             output_dir,
             {
                 "pngcheck": {
                     "status": "ok",
-                    "output": data_strings,
+                    "output": data_pngcheck,
                 }
             },
         )

aperisolve/analyzers/steghide.py

@@ -12,7 +12,7 @@ from .utils import MAX_PENDING_TIME, update_data
 def analyze_steghide(
     input_img: Path, output_dir: Path, password: Optional[str] = None
 ) -> None:
-    """Analyze an image submission using stehide."""
+    """Analyze an image submission using steghide."""
 
     image_name = input_img.name
     try:

aperisolve/analyzers/utils.py

@@ -2,10 +2,14 @@
 
 import fcntl
 import json
+import math
 import os
+import struct
 import threading
+import zlib
+from functools import cached_property
 from pathlib import Path
-from typing import Any
+from typing import Any, Iterable, Self
 
 _thread_lock = threading.Lock()
 
@@ -46,3 +50,252 @@ def update_data(
                 os.replace(tmp_file, json_file)  # ensures file write is atomic
             finally:
                 fcntl.flock(lock, fcntl.LOCK_UN)
+
+
+def get_resolutions() -> list[tuple[int, int]]:
+    """
+    Generate a sorted list of common display and image resolutions.
+
+    Creates a comprehensive set of resolution tuples by combining various base widths
+    with standard aspect ratios used in screens, digital displays, photography, and
+    paper standards. Includes both portrait and landscape orientations.
+
+    Base widths range from 16px to 10000px, covering:
+    - Low resolution: 16-256px (16px increments)
+    - Standard: 320-1024px (32px increments)
+    - HD/Full HD: 1280-2560px (64px increments)
+    - 4K: 3000-4096px (128px increments)
+    - 5K-8K: 5120-8192px (256px increments)
+    - Upper bound: 10000px
+
+    Aspect ratios include common formats:
+    - Digital screens: 1:1, 4:3, 3:2, 16:10, 16:9, 21:9
+    - Photography/print: 5:4, 7:5, 2:3
+    - Paper standards: ISO A-series, US Letter, Legal, Tabloid
+
+    Returns:
+        list[tuple[int, int]]: Sorted list of (width, height) resolution tuples
+                               with heights constrained between 1 and 10000 pixels.
+    """
+    base_widths = (
+        list(range(16, 257, 16))  # 16 → 256
+        + list(range(320, 1025, 32))  # 320 → 1024
+        + list(range(1280, 2561, 64))  # 1280 → 2560
+        + list(range(3000, 4097, 128))  # 3K–4K
+        + list(range(5120, 8193, 256))  # 5K–8K
+        + [10000]  # upper bound
+    )
+    aspect_ratios = [
+        # Screens / digital
+        (1, 1),  # square
+        (4, 3),
+        (3, 2),
+        (16, 10),
+        (16, 9),
+        (21, 9),
+        # Photography / print
+        (5, 4),  # 8x10
+        (7, 5),  # 5x7
+        (3, 2),  # 4x6 (already included, kept for clarity)
+        (2, 3),  # poster
+        # Paper standards
+        (1414, 1000),  # ISO A-series (A4, A3, A2, ...)
+        (11, 85),  # US Letter
+        (14, 85),  # Legal
+        (17, 11),  # Tabloid
+    ]
+    resolutions: set[tuple[int, int]] = set()
+    for w in base_widths:
+        for ar_w, ar_h in aspect_ratios:
+            h = math.floor(round(w * ar_h / ar_w))
+            if 1 <= h <= 10000:
+                resolutions.add((w, h))
+                resolutions.add((h, w))  # portrait / landscape
+    return sorted(resolutions)
+
+
+def get_valid_depth_color_pairs() -> Iterable[tuple[int, int]]:
+    """
+    Generate valid combinations of color and bit depth values.
+
+    Yields tuples of (depth, color) representing valid color mode and bit depth
+    combinations. Supports grayscale (0), RGB (2, 3, 4, 6) color modes with
+    appropriate bit depths (1, 2, 4, 8, 16 bits).
+
+    Yields:
+        tuple: A tuple of (depth, color) where depth is an integer representing
+               bit depth and color is an integer representing the color mode.
+    """
+    valid_color_depth = {
+        0: [1, 2, 4, 8, 16],
+        2: [8, 16],
+        3: [1, 2, 4, 8],
+        4: [8, 16],
+        6: [8, 16],
+    }
+    for color, depths in valid_color_depth.items():
+        for depth in depths:
+            yield depth, color
+
+
+class PNG:
+    """
+    A class representing a PNG image header (IHDR chunk).
+    This class encapsulates the metadata from a PNG file's IHDR (Image Header) chunk,
+    including image dimensions, bit depth, color type, interlacing method, and CRC checksum.
+    It provides methods for parsing PNG files, packing/unpacking header data, and generating
+    PNG crc if omitted.
+    """
+
+    width: int
+    height: int
+    bit_depth: int
+    color_type: int
+    crc: int
+    interlace: int = 0
+
+    def __init__(  # pylint: disable=R0913
+        self,
+        size: tuple[int, int],
+        bit_depth: int,
+        color_type: int,
+        *,
+        crc: int | None = None,
+        interlace: int = 0,
+    ):
+        """Initialize a PNG IHDR (Image Header) chunk.
+
+        Args:
+            size (tuple[int, int]): The width and height of the image in pixels.
+            bit_depth (int): The number of bits per sample or per palette index (1, 2, 4, 8, or 16).
+            color_type (int): The color type of the image (0=Grayscale, 2=RGB, 3=Indexed,
+                              4=Grayscale+Alpha, 6=RGBA).
+            crc (int | None, optional): CRC (Cyclic Redundancy Check) checksum for the chunk.
+                                        If None, it will be calculated automatically. Defaults
+                                        to None.
+            interlace (int, optional): The interlace method (0=no interlace, 1=Adam7 interlace).
+                                       Defaults to 0.
+        """
+        self.width = size[0]
+        self.height = size[1]
+        self.bit_depth = bit_depth
+        self.color_type = color_type
+        self.crc = (
+            crc
+            or zlib.crc32(
+                b"IHDR"
+                + self.width.to_bytes(4, "big")
+                + self.height.to_bytes(4, "big")
+                + bytes((bit_depth, color_type, 0, 0, interlace))
+            )
+            & 0xFFFFFFFF
+        )
+        self.interlace = interlace
+
+    @classmethod
+    def from_packed(cls, packed: int, crc: int | None = None) -> Self:
+        """Create a PNG instance from a packed integer representation.
+
+        Parse a packed integer containing width, height, bit depth, color type and interlace
+        bits and return a PNG instance. The CRC may be supplied; if omitted it will be
+        computed by the constructor.
+
+        Args:
+            packed (int): Packed integer with fields laid out as described in the `packed` property.
+            crc (int | None): Optional CRC value for the IHDR chunk.
+
+        Returns:
+            Self: PNG instance with parsed fields.
+        """
+        interlace = packed & 0b1
+        color = (packed >> 1) & 0b111
+        depth = (packed >> 4) & 0b111
+        height = (packed >> 7) & 0xFFFF
+        width = (packed >> 23) & 0xFFFF
+        return cls(
+            size=(width, height),
+            bit_depth=depth,
+            color_type=color,
+            crc=crc,
+            interlace=interlace,
+        )
+
+    @cached_property
+    def packed(self) -> int:
+        """Pack IHDR fields into a single integer.
+
+        Returns:
+            int: Packed integer encoding the IHDR fields.
+
+        Layout:
+            width     : 16 bits
+            height    : 16 bits
+            depth     : 3 bits
+            color     : 3 bits
+            interlace : 1 bit
+        """
+        return (
+            ((self.width & 0xFFFF) << 23)
+            | ((self.height & 0xFFFF) << 7)
+            | ((self.bit_depth & 0b111) << 4)
+            | ((self.color_type & 0b111) << 1)
+            | (self.interlace & 0b1)
+        )
+
+    @classmethod
+    def from_bytearray(cls, data: bytearray) -> Self:
+        """Create a PNG image instance from a bytearray containing PNG file data.
+
+        Parses the PNG signature and IHDR (Image Header) chunk to extract image metadata
+        including dimensions, bit depth, color type, and interlacing information.
+
+        Args:
+            data (bytearray): A bytearray containing the complete PNG file data, starting
+                with the PNG signature (8 bytes: \\x89PNG\\r\\n\\x1a\\n).
+
+        Returns:
+            Self | None: A new instance of the PNG image class with parsed IHDR metadata
+                (width, height, bit_depth, color_type, crc, interlace) if the data is
+                valid and contains a proper IHDR chunk. Returns None if the PNG signature
+                is invalid or the IHDR chunk type is not found.
+
+        Raises:
+            struct.error: If the data is too short or malformed for unpacking IHDR fields.
+            IndexError: If the bytearray is shorter than expected for the PNG structure.
+        """
+
+        png_signature = b"\x89PNG\r\n\x1a\n"
+        if bytes(data[:8]) != png_signature:
+            raise ValueError("Invalid PNG signature")
+        offset = 8  # Read IHDR chunk
+        length = struct.unpack(">I", data[offset : offset + 4])[0]
+        offset += 4
+        chunk_type = data[offset : offset + 4]
+        offset += 4
+        if bytes(chunk_type) != b"IHDR":
+            raise ValueError("IHDR chunk not found at expected position")
+
+        ihdr_data = data[offset : offset + length]
+        offset += length
+
+        crc = struct.unpack(">I", data[offset : offset + 4])[0]
+
+        # Unpack IHDR fields
+        width, height, depth, color, _, _, interlace = struct.unpack(
+            ">IIBBBBB", ihdr_data
+        )
+
+        return cls(
+            size=(width, height),
+            bit_depth=depth,
+            color_type=color,
+            crc=crc,
+            interlace=interlace,
+        )
+
+    def __repr__(self) -> str:
+        return (
+            f"PNG(width={self.width}, height={self.height}, "
+            f"bit_depth={self.bit_depth}, color_type={self.color_type}, "
+            f"interlace={self.interlace}, crc=0x{self.crc:08x})"
+        )

aperisolve/app.py

@@ -1,4 +1,4 @@
-"""AperiSolve Flask application."""
+"""Aperi'Solve Flask application."""
 
 import hashlib
 import json
@@ -41,7 +41,7 @@ def too_large(_: Any) -> tuple[Response, int]:
 @app.errorhandler(404)
 def not_found(_: Any) -> str:
     """Error Handler for 404 not found."""
-    return render_template("error.html", message="Ressource not found", statuscode=404)
+    return render_template("error.html", message="Resource not found", statuscode=404)
 
 
 @app.route("/")
@@ -134,12 +134,12 @@ def upload_image() -> tuple[Response, int]:
             first_submission_date=datetime.now(timezone.utc),
             last_submission_date=datetime.now(timezone.utc),
         )
-        db.session.add(new_img)
+        db.session.add(new_img)  # pylint: disable=no-member
-        db.session.commit()
+        db.session.commit()  # pylint: disable=no-member
 
     sub_img = Image.query.filter_by(hash=img_hash).first()  # type: ignore
     sub_img.upload_count += 1
-    db.session.commit()
+    db.session.commit()  # pylint: disable=no-member
 
     # Create new Submission entry
     submission_path.mkdir(parents=True, exist_ok=True)
@@ -152,9 +152,9 @@ def upload_image() -> tuple[Response, int]:
         date=time.time(),
         image_hash=sub_img.hash,  # type: ignore
     )
-    db.session.add(submission)
+    db.session.add(submission)  # pylint: disable=no-member
 
-    db.session.commit()  # Commit to save the new Image and Submission
+    db.session.commit()  # pylint: disable=no-member
     # Start the analysis jobs
     queue.enqueue("aperisolve.workers.analyze_image", submission.hash, job_timeout=300)
 

aperisolve/cleanup.py

@@ -14,7 +14,28 @@ 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."""
+    """
+    Clean up old and incomplete entries from the database and file system.
+
+    This function performs two main cleanup operations:
+
+    1. Submission cleanup:
+       - Deletes submissions with "pending" or "running" status that have exceeded
+         the maximum allowed processing time (MAX_PENDING_TIME).
+       - Deletes completed submissions ("done" status) that have missing or buggy
+         results (results.json file not found).
+
+    2. Image cleanup:
+       - Deletes images older than MAX_STORE_TIME along with all associated
+         submissions and their result folders.
+       - Deletes orphaned images (with no submissions) older than MAX_PENDING_TIME
+         and removes their associated result folders from the file system.
+
+    All database changes are committed at the end of the operation.
+
+    Returns:
+        None
+    """
     now = time.time()
     for submission in Submission.query.all():  # type: ignore
         if (
@@ -22,7 +43,7 @@ def cleanup_old_entries() -> None:
             and now - submission.date > MAX_PENDING_TIME  # type: ignore
         ):
             # Processing took too long, delete
-            db.session.delete(submission)  # type: ignore
+            db.session.delete(submission)  # pylint: disable=no-member
         elif submission.status == "done":  # type: ignore
             # Search for buggy results, delete
             result_path = (
@@ -30,7 +51,7 @@ def cleanup_old_entries() -> None:
             )
             result_file = result_path / "results.json"
             if not result_file.exists():
-                db.session.delete(submission)  # type: ignore
+                db.session.delete(submission)  # pylint: disable=no-member
                 shutil.rmtree(result_path)
 
     # Delete "old" images
@@ -43,15 +64,15 @@ def cleanup_old_entries() -> None:
         img_fold = RESULT_FOLDER / img.hash
         if delay.total_seconds() > MAX_STORE_TIME:
             for s in img.submissions:
-                db.session.delete(s)  # type: ignore
+                db.session.delete(s)  # pylint: disable=no-member
             if img_fold.exists():
                 shutil.rmtree(img_fold)  # type: ignore
-            db.session.delete(img)
+            db.session.delete(img)  # pylint: disable=no-member
 
         # Delete Images with missing submission
         if len(img.submissions) == 0 and delay.total_seconds() > MAX_PENDING_TIME:
             if img_fold.exists():
                 shutil.rmtree(img_fold)  # type: ignore
-            db.session.delete(img)
+            db.session.delete(img)  # pylint: disable=no-member
 
-    db.session.commit()
+    db.session.commit()  # pylint: disable=no-member

aperisolve/config.py

@@ -1,4 +1,4 @@
-"""AperiSolve configuration variables."""
+"""Aperi'Solve configuration variables."""
 
 from pathlib import Path
 

aperisolve/models.py

@@ -1,11 +1,13 @@
-"""This module defines the database models for the Aperisolve application."""
+"""This module defines the database models for the Aperi'Solve application."""
 
+import itertools
 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
+from sqlalchemy import BigInteger, Boolean, Column, DateTime, Float, Integer, String
+
+from aperisolve.analyzers.utils import PNG, get_resolutions, get_valid_depth_color_pairs
 
 db: SQLAlchemy = SQLAlchemy()
 
@@ -13,21 +15,19 @@ db: SQLAlchemy = SQLAlchemy()
 class Image(db.Model):  # type: ignore
     """Model representing an image file in the database."""
 
-    hash: Column[str] = Column(
+    hash = Column(String(64), primary_key=True, unique=True, nullable=False)
-        String(64), primary_key=True, unique=True, nullable=False
+    file = Column(String(128), unique=True, nullable=False)
-    )
+    size = Column(Integer, nullable=False)
-    file: Column[str] = Column(String(128), unique=True, nullable=False)
+    first_submission_date = Column(
-    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(
+    last_submission_date = Column(
         DateTime,
         nullable=False,
         default=lambda: datetime.now(timezone.utc),
         onupdate=lambda: datetime.now(timezone.utc),
     )
-    upload_count: Column[int] = Column(Integer)
+    upload_count = Column(Integer)
     submissions = db.relationship("Submission", backref="image", lazy=True)
 
 
@@ -37,25 +37,97 @@ class Submission(db.Model):  # type: ignore
     option.
     """
 
-    hash: Column[str] = Column(
+    hash = Column(String(128), primary_key=True, unique=True, nullable=False)
-        String(128), primary_key=True, unique=True, nullable=False
+    filename = Column(String(128), nullable=False)
-    )
+    password = Column(String(128))
-    filename: Column[str] = Column(String(128), nullable=False)
+    deep_analysis = Column(Boolean, default=False)
-    password: Column[str] = Column(String(128))
+    status = Column(String(20), default="pending")
-    deep_analysis: Column[bool] = Column(Boolean, default=False)
+    date = Column(Float, nullable=False, default=lambda: datetime.now(timezone.utc))
-    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)
 
 
+class IHDR(db.Model):  # type: ignore
+    """IHDR CRC lookup table"""
+
+    iid = Column(Integer, primary_key=True, autoincrement=True)
+    crc = Column(BigInteger, nullable=False)
+    packed = Column(BigInteger, nullable=False)
+
+
+def create_crc_db() -> None:
+    """
+    Creates a database of common PNG IHDR (Image Header) entries by generating
+    combinations of standard PNG parameters such as resolutions, bit depths,
+    color types, and interlace methods. The function checks for existing entries
+    in the database to avoid duplicates and inserts new entries in batches of
+    5000, committing the changes to the database periodically.
+
+    Returns:
+        None
+    """
+    # Standard PNG IHDR parameters
+    resolutions = get_resolutions()
+    bit_color_pairs = get_valid_depth_color_pairs()
+    interlace_methods = [0, 1]
+
+    combinations = itertools.product(
+        resolutions,
+        bit_color_pairs,
+        interlace_methods,
+    )
+
+    count = 0
+
+    with db.session.no_autoflush:  # pylint: disable=no-member
+        for size, (bd, ct), inter in combinations:
+            p = PNG(size=size, bit_depth=bd, color_type=ct, interlace=inter)
+
+            exists = db.session.execute(  # pylint: disable=no-member
+                db.select(IHDR.iid).where(IHDR.packed == p.packed)
+            ).first()
+
+            if exists:  # Skip if already present
+                continue
+
+            db.session.add(  # pylint: disable=no-member
+                IHDR(packed=p.packed, crc=p.crc)
+            )
+            count += 1
+
+            if count % 5000 == 0:
+                print(f"Inserted {count} common IHDR entries...")
+                db.session.commit()
+
+    db.session.commit()  # pylint: disable=no-member
+    print(f"Precomputed {count} common IHDR entries.")
+
+
 def init_db(app: Flask) -> None:
-    """Initialize the database with the given Flask app."""
+    """
+    Initialize the database by creating tables and populating lookup data.
+
+    This function creates the database schema if it doesn't already exist,
+    and populates the CRC lookup table for PNG IHDR validation.
+
+    Args:
+        app (Flask): The Flask application instance used to establish the application context
+                    for database operations.
+
+    Returns:
+        None
+
+    Side Effects:
+        - Creates all database tables if the "image" table doesn't exist
+        - Populates the IHDR CRC lookup table with initial data
+        - Prints status messages to console during initialization
+    """
     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.")
+            print("Database structure created successfully.")
+            print("Filling IHDR lookup table...")
+            create_crc_db()
+            print("IHDR table filled successfully.")

aperisolve/static/css/aperisolve.css

@@ -330,7 +330,7 @@ td {
 
 #cheatsheet li::before {
     content: "\f054";
-    font-family: "Font Awesome 6 Free";
+    font-family: "Font Awesome 7 Free";
     font-weight: 900;
     position: absolute;
     left: 0;
@@ -397,11 +397,17 @@ footer {
     }
 }
 
-
 footer a i {
     font-size: 32px;
 }
 
+#coffee {
+    height: 32px;
+    display: inline-block;
+    vertical-align: middle;
+    width: auto;
+}
+
 /* ======== Utility ======== */
 
 .glow-border {

aperisolve/static/js/aperisolve.js

@@ -279,6 +279,12 @@ function parseResult(result) {
         )}'/></div>`;
       }
 
+      if ("png_images" in result[tool]) {
+        for (const image of result[tool]["png_images"]) {
+             analyzer.innerHTML += `<div class='results_img'><img src='${escapeHtml(image)}'/></div>`;
+        }
+      }
+
       // Parse text output
   
 

aperisolve/templates/base.html

@@ -6,8 +6,8 @@
   <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://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.1/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="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.min.css" rel="stylesheet" />
   <link href="/static/css/aperisolve.css" rel="stylesheet" />
   <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2324718887045017"
      crossorigin="anonymous"></script>

aperisolve/templates/footer.html

@@ -1,4 +1,9 @@
 <footer class="d-flex justify-content-center gap-4 my-4">
+    <div>
+        <a href="https://buymeacoffee.com/aperisolve" title="Coffee" class="text-light text-decoration-none">
+            <img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" id="coffee" />
+        </a>
+    </div>
     <div>
         <a href="/faq" title="FAQ" class="text-light text-decoration-none">
             <i class="fa-regular fa-circle-question"></i>

aperisolve/workers.py

@@ -8,19 +8,43 @@ 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.image_resize import analyze_image_resize
 from .analyzers.outguess import analyze_outguess
+from .analyzers.pngcheck import analyze_pngcheck
 from .analyzers.steghide import analyze_steghide
 from .analyzers.strings import analyze_strings
 from .analyzers.zsteg import analyze_zsteg
-from .analyzers.pngcheck import analyze_pngcheck
-from .analyzers.image_resize import analyze_image_resize
 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."""
+    """
+    Analyze an image submission by running multiple analysis tools concurrently.
+
+    This function retrieves a submission and its associated image from the database,
+    then executes various image analysis tools in parallel threads. The analysis tools
+    include binwalk, decomposer, exiftool, foremost, strings, pngcheck, steghide,
+    zsteg, and image resize. If deep analysis is enabled, additional tools like
+    outguess are included.
+
+    Args:
+        submission_hash (str): The unique hash identifier of the submission to analyze.
+
+    Returns:
+        None
+
+    Raises:
+        Implicitly catches and handles exceptions during analysis, setting submission
+        status to "error" if an exception occurs.
+
+    Side Effects:
+        - Queries the database for the submission and associated image
+        - Updates submission status in the database ("running" -> "completed" or "error")
+        - Creates result directories and generates analysis output files
+        - Modifies the database session and commits changes
+    """
     with app.app_context():
         submission: Submission = Submission.query.get(submission_hash)  # type: ignore
         image = Image.query.get_or_404(submission.image_hash)  # type: ignore
@@ -29,7 +53,7 @@ def analyze_image(submission_hash: str) -> None:
             return
 
         submission.status = "running"  # type: ignore
-        db.session.commit()
+        db.session.commit()  # pylint: disable=no-member
 
         try:
             img_path: Path = Path(image.file)
@@ -77,4 +101,4 @@ def analyze_image(submission_hash: str) -> None:
         except Exception:
             submission.status = "error"
         finally:
-            db.session.commit()
+            db.session.commit()  # pylint: disable=no-member