odzhan

# ElGamal encryption

import random
from sympy import isprime, mod_inverse

# Generate a large prime number for the modulus (p)
def generate_large_prime(bits=256):
    while True:
        p = random.getrandbits(bits)
        if isprime(p):

odzhan

import hashlib
import secrets

# Elliptic Curve Parameters (placeholders for educational purposes)
p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F  # Field prime
a = 0
b = 7
n = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141  # Order of G

# Base point G (using Bitcoin's secp256k1 parameters for illustration)

odzhan

'''
    Schnorr Digital Signature Scheme based on paper: 
        Efficient Signature Generation by Smart Cards, published in March 1991 by Claus-Peter Schnorr
    
'''

from random import randint
import sympy
import hashlib

odzhan

/**
    Running test...key : 803D8AB2E5B6E6FCA715737C3A82F7CE3C783124F6D51CD0
    Session keys match...
    OK.
    Generating random keys...OK
    Private Key for Alice : 31FA1084
    Private Key for Bob   : 2D748885

    Generating public keys...
    Public Key for Alice : (10DEE015, 7A458BE8)

odzhan

/**
    ECC-32 implementation

    Private Key for Alice : 775bd026
    Private Key for Bob   : 5133580e

    Public Key for Alice : (32f20f84, 63852a02)
    Public Key for Bob   : (6d4444c2, 1563edf9)

    Session Key for Alice : (2f3a9fa3, 6a9fa1ce)

odzhan

#
# ECDH using P-192 prime192v1
#
# Runs very slow because of binary methods used.
#
import random

# Elliptic curve parameters P-192 prime192v1
p = 0xfffffffffffffffffffffffffffffffeffffffffffffffff

odzhan

//
// Simple regexp example using IRegExp interface.
//

/**
 # Found 4 matches.

 > [email protected]
 > [email protected]

odzhan

//
// Simple obfuscation using byte substitution
//

#include <cstdio>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <cmath>

odzhan

//
// @modexpblog
//
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cstdint>
#include <ctime>
#include <cmath>
#include <fcntl.h>

odzhan

//
// How to locate the NT Delegate Callback Table in x86 builds of ntdll.dll
//
// @modexpblog
//

#define PHNT_VERSION PHNT_THRESHOLD
#include <phnt_windows.h>
#include <phnt.h>