https://github.com/eliainnocenti/cryptography-exercises
Exercises for Cryptography Exam @ Polito - Cryptographic primitives in C with OpenSSL and prototype attacks in Python.
https://github.com/eliainnocenti/cryptography-exercises
asymmetric-cryptography c cryptography ctf digest encryption-decryption offensive-security openssl python rando random-number-generators symmetric-cryptography
Last synced: 6 months ago
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Exercises for Cryptography Exam @ Polito - Cryptographic primitives in C with OpenSSL and prototype attacks in Python.
- Host: GitHub
- URL: https://github.com/eliainnocenti/cryptography-exercises
- Owner: eliainnocenti
- Created: 2025-03-04T06:57:54.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2025-03-23T11:34:46.000Z (7 months ago)
- Last Synced: 2025-03-23T12:22:56.461Z (7 months ago)
- Topics: asymmetric-cryptography, c, cryptography, ctf, digest, encryption-decryption, offensive-security, openssl, python, rando, random-number-generators, symmetric-cryptography
- Language: C
- Homepage:
- Size: 82 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Cryptography Exercises
This repository contains materials for the **Cryptography** course at **Politecnico di Torino**, focusing on both implementation and attack scenarios to bridge theory and practice.
## Overview
The exercises are divided into two main parts:
- **C Programming with OpenSSL:**
Learn how to implement cryptographic primitives and protocols in C. Exercises include:
- **Random Numbers:** Generating cryptographically secure pseudo-random numbers.
- **Symmetric Encryption:** Implementing and understanding symmetric ciphers.
- **Digests & MACs:** Working with hash functions and message authentication codes.
- **Big Numbers:** Handling large integer arithmetic for crypto applications.
- **Asymmetric Cryptography:** Exploring public-key techniques and RSA.
- **Python for Cryptography Attacks:**
Focus on rapidly prototyping and executing attacks, as Python is the de facto language for quick and effective exploit development.
> [!NOTE]
> For further details, refer to the course slides and materials provided during the lectures.
## Repository Structure
The repository is organized as follows:
| Section | Description |
| --------------- | ---------------------------------------------------------------------- |
| **`C/OpenSSL`** | Exercises using C and OpenSSL covering various cryptographic topics. |
| **`C/CTFs`** | Capture The Flag (CTF) challenges implemented in C, focusing on practical cryptographic problems and solutions. |
| **`Python`** | Placeholder for cryptography and CTF challenges implemented in Python. |
Inside the **`C/OpenSSL`** folder, exercises are structured into dedicated directories:
| Exercise | Description |
| ------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [**`Random Numbers`**](C/OpenSSL/01-random-numbers/README.md) | Generating cryptographically secure pseudo-random numbers using OpenSSL. |
| [**`Symmetric Encryption`**](C/OpenSSL/02-symmetric-encryption/README.md) | Implementing symmetric encryption algorithms with OpenSSL. |
| [**`Digests and MACs`**](C/OpenSSL/03-digests-MACs/README.md) | Exploring cryptographic digests and MACs. |
| [**`Big Numbers`**](C/OpenSSL/04-big-numbers/README.md) | Handling big numbers in cryptographic operations. |
| [**`Asymmetric Cryptography`**](C/OpenSSL/05-asymmetric-cryptography/README.md) | Working with asymmetric cryptography and public key operations. |
Inside the **`C/CTFs`** folder, exercises are structured into dedicated directories:
| CTF Challenge | Description |
| ----------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [**`Rand`**](C/CTFs/rand/README.md) | Bytewise operations on random strings to capture the flag. |
| [**`Encryption`**](C/CTFs/enc/README.md) | Various encryption challenges including padding, decryption, and more. |
| [**`Digest`**](C/CTFs/dgst/README.md) | Compute keyed digests and modify digest algorithms to capture the flag. |
| [**`HMAC`**](C/CTFs/hmac/README.md) | Compute HMAC-SHA256 of two files to capture the flag. |
| [**`Asymmetric`**](C/CTFs/asym/README.md) | Find missing parameters using BIGNUM primitives to capture the flag. |
## Author
- GitHub: [@eliainnocenti](https://github.com/eliainnocenti)
- Email: [elia.innocenti@studenti.polito.it](mailto:elia.innocenti@studenti.polito.it)