ajout cheat_sheet

cheat_sheet/modules.md

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+# 🐍 Core Python (your foundation)
+
+These are built-in. You’ll use them everywhere.
+
+* `socket` → low-level networking (port scanners, connections)
+* `subprocess` → run system commands (e.g. `ping`, `nmap`)
+* `os` → interact with the operating system
+* `sys` → handle arguments and runtime behavior
+* `threading` / `concurrent.futures` → speed up scans
+* `time` → delays, timing attacks (basic)
+* `re` → regex (log analysis, pattern detection)
+* `json` → handle API and structured data
+* `argparse` → clean CLI tools (very useful)
+
+---
+
+# 🌐 Networking & Web
+
+Where most beginner cybersecurity action happens.
+
+* `requests` → send HTTP requests (GET, POST, etc.)
+* `urllib` → lower-level web handling
+* `http.client` → raw HTTP interactions
+
+👉 You’ll use these for:
+
+* Web scanners
+* API testing
+* Automation scripts
+
+---
+
+# 🍲 Parsing & Scraping
+
+Turning messy data into something useful.
+
+* `BeautifulSoup` (bs4) → parse HTML
+* `lxml` → faster HTML/XML parsing
+
+👉 Useful for:
+
+* Extracting forms and inputs
+* Web reconnaissance
+
+---
+
+# 🔍 Security & Scanning
+
+More “cyber-flavored” tools.
+
+* `scapy` → packet crafting/sniffing (very powerful)
+* `nmap` (via `python-nmap`) → automate scans
+* `shodan` → search exposed devices (API)
+
+👉 These unlock:
+
+* Network analysis
+* Recon automation
+
+---
+
+# 🔐 Cryptography & Hashing
+
+For passwords, encryption, and security logic.
+
+* `hashlib` → hashing (MD5, SHA256, etc.)
+* `hmac` → message authentication
+* `cryptography` → encryption/decryption (advanced)
+
+👉 Use cases:
+
+* Password crackers
+* Hash verification
+
+---
+
+# 📂 File & Log Analysis
+
+Blue team territory.
+
+* `pandas` → analyze large datasets/logs
+* `csv` → parse log files
+* `collections` → count patterns (e.g. IP frequency)
+
+---
+
+# ⚙️ CLI & Tooling (make your scripts look pro)
+
+* `argparse` → command-line arguments
+* `colorama` → colored terminal output
+* `rich` → beautiful CLI dashboards
+
+---

cheat_sheet/socket.md

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+The `socket` module is where Python stops being polite and starts speaking raw network 🧩📡
+Here’s a **clean, practical cheat sheet** you’ll actually use when building cyber tools.
+
+---
+
+# 🐍 `socket` Cheat Sheet (Cybersecurity Edition)
+
+## 🔌 Create a Socket
+
+```python
+import socket
+
+s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+```
+
+* `AF_INET` → IPv4
+* `SOCK_STREAM` → TCP
+* (use `SOCK_DGRAM` for UDP)
+
+---
+
+## 🌐 Connect to a Target (Client)
+
+```python
+s.connect(("127.0.0.1", 80))
+```
+
+👉 Used in:
+
+* Port scanners
+* Banner grabbing
+
+---
+
+## 📤 Send Data
+
+```python
+s.send(b"GET / HTTP/1.1\r\nHost: example.com\r\n\r\n")
+```
+
+* Must be **bytes** (`b""`)
+
+---
+
+## 📥 Receive Data
+
+```python
+response = s.recv(1024)
+print(response.decode())
+```
+
+* `1024` = buffer size
+
+---
+
+## ❌ Close Connection
+
+```python
+s.close()
+```
+
+---
+
+# 🔍 Port Scanner Example (core pattern)
+
+```python
+import socket
+
+target = "127.0.0.1"
+
+for port in range(1, 1025):
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.settimeout(2)
+
+    result = s.connect_ex((target, port))
+
+    if result == 0:
+        print(f"Port {port} is open")
+
+    s.close()
+```
+
+🔥 Key trick:
+
+* `connect_ex()` returns `0` if open (no crash, cleaner)
+
+---
+
+# ⏱️ Timeout (avoid freezing forever)
+
+```python
+s.settimeout(1)
+```
+
+Without this, your scanner becomes a fossil 🦴
+
+---
+
+# 🖥️ Simple Server (Listener)
+
+```python
+import socket
+
+s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+s.bind(("0.0.0.0", 4444))
+s.listen(1)
+
+conn, addr = s.accept()
+print(f"Connection from {addr}")
+
+data = conn.recv(1024)
+print(data.decode())
+
+conn.close()
+```
+
+👉 Used in:
+
+* Backdoor simulations
+* Reverse shells (ethical labs only)
+
+---
+
+# 📡 UDP Socket (connectionless)
+
+```python
+s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+s.sendto(b"Hello", ("127.0.0.1", 53))
+```
+
+---
+
+# 🧠 Useful Methods Quick List
+
+* `socket()` → create socket
+* `connect()` → connect to server
+* `connect_ex()` → safer connect
+* `send()` / `sendall()` → send data
+* `recv()` → receive data
+* `bind()` → attach to IP/port
+* `listen()` → wait for connections
+* `accept()` → accept connection
+* `close()` → close socket
+
+---
+
+# ⚠️ Common Mistakes
+
+* Forgetting `.close()` → zombie sockets
+* Not using timeout → slow scans
+* Sending string instead of bytes → 💥 error
+* Scanning too fast → gets blocked