I hereby claim:
- I am vkobel on github.
- I am kob (https://keybase.io/kob) on keybase.
- I have a public key ASC--Xup1G4N3kXzgP9dyVqlpN2T0Nnc6_K1ds9K7uh4ZAo
To claim this, I am signing this object:
Vincent Kobel vkobel
vkobel
/ _toy_ecdsa.py
Last active
August 16, 2024 14:27
Toy ECDSA implementation (no deps) -- education purposes only, do NOT use in prod
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| import hashlib | |
| import secrets | |
| # Parameters for the secp256k1 curve | |
| p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F | |
| a = 0 | |
| b = 7 | |
| Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798 | |
| Gy = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8 | |
| n = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 |
vkobel
/ incremental_merkle.py
Last active
June 21, 2024 11:17
Short incremental Merkle Tree python implementation
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| import hashlib | |
| import random | |
| class IncrementalMerkleTree: | |
| def __init__(self, depth: int) -> None: | |
| if depth < 1: | |
| raise ValueError("Depth must be at least 1") | |
| self.depth: int = depth | |
| self.leaf_count: int = 2 ** depth |
vkobel
/ permit-signer.html
Created
December 21, 2023 15:29
Web3 signer for the EIP-20 Permit method
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>ERC20 Permit Signing</title> | |
| <script src="https://cdn.jsdelivr.net/npm/web3/dist/web3.min.js"></script> | |
| </head> | |
| <style> | |
| body { |
vkobel
/ hash_kernel_module.c
Last active
March 14, 2025 03:55
Example of using the Linux Kernel Crypto API for SHA256 hashing (tested with 5.6)
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| #include <linux/module.h> | |
| #include <crypto/hash.h> | |
| struct sdesc { | |
| struct shash_desc shash; | |
| char ctx[]; | |
| }; | |
| static struct sdesc *init_sdesc(struct crypto_shash *alg) | |
| { |
vkobel
/ kernel_rootkit.c
Last active
September 3, 2025 08:24
Simple "rootkit" kernel module (tested with Linux 5.6.3) that adds a device handler taking a PID and upgrade it to root (example in the comments below)
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| #include <linux/module.h> | |
| #include <linux/kernel.h> | |
| #include <linux/cred.h> | |
| #include <linux/fs.h> | |
| MODULE_LICENSE("GPL"); | |
| struct task_struct *get_task_struct_by_pid(unsigned pid) | |
| { | |
| struct pid *proc_pid = find_vpid(pid); |
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| ❯ ccat ~/.config/nvim/init.vim | |
| " ====================== | |
| " Plugins are define here | |
| " ====================== | |
| call plug#begin('~/.vim/plugged') | |
| Plug 'Valloric/YouCompleteMe' | |
| Plug 'scrooloose/nerdtree' | |
| Plug 'drewtempelmeyer/palenight.vim' | |
| Plug 'itchyny/lightline.vim' |
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| ## /etc/udev/rules.d/21-yubikey.rules | |
| ACTION=="remove", SUBSYSTEM=="input", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0407", RUN+="/usr/local/bin/lockscreen.sh" |
vkobel
/ patchfile.diff
Last active
May 23, 2019 16:21
paramiko crypto remove warnings patch for master(cf7d49d66f3b1fbc8b0853518a54050182b3b5eb)
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| diff --git a/ecdsakey.py b/ecdsakey.py | |
| index b73a969e..353c5f9e 100644 | |
| --- a/ecdsakey.py | |
| +++ b/ecdsakey.py | |
| @@ -160,12 +160,12 @@ class ECDSAKey(PKey): | |
| pointinfo = msg.get_binary() | |
| try: | |
| - numbers = ec.EllipticCurvePublicNumbers.from_encoded_point( | |
| + key = ec.EllipticCurvePublicKey.from_encoded_point( |
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| [Interface] | |
| Address = 10.0.0.2/24 | |
| PrivateKey = <Client 1 Priv Key> | |
| [Peer] | |
| PublicKey = <Server Pub Key> | |
| Endpoint = <Server Public IP>:51820 | |
| AllowedIPs = 0.0.0.0/0 | |
| PersistentKeepalive = 25 |
vkobel
/ keybase.md
Created
June 4, 2018 08:36
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