This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import math | |
| def egcd(a, b): | |
| x,y, u,v = 0,1, 1,0 | |
| while a != 0: | |
| q, r = b//a, b%a | |
| m, n = x-u*q, y-v*q | |
| b,a, x,y, u,v = a,r, u,v, m,n | |
| gcd = b | |
| return gcd, x, y |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import fractions | |
| def egcd(a, b): | |
| x,y, u,v = 0,1, 1,0 | |
| while a != 0: | |
| q, r = b//a, b%a | |
| m, n = x-u*q, y-v*q | |
| b,a, x,y, u,v = a,r, u,v, m,n | |
| gcd = b | |
| return gcd, x, y |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def egcd(a, b): | |
| x,y, u,v = 0,1, 1,0 | |
| while a != 0: | |
| q, r = b//a, b%a | |
| m, n = x-u*q, y-v*q | |
| b,a, x,y, u,v = a,r, u,v, m,n | |
| gcd = b | |
| return gcd, x, y | |
| def decrypt(p, q, e, ct): |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| from fractions import Fraction | |
| def egcd(a, b): | |
| x,y, u,v = 0,1, 1,0 | |
| while a != 0: | |
| q, r = b//a, b%a | |
| m, n = x-u*q, y-v*q | |
| b,a, x,y, u,v = a,r, u,v, m,n | |
| gcd = b | |
| return gcd, x, y |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def plus(x, y): | |
| return (x + y) & 0xffffffff | |
| def rotate(x, n): | |
| y = x << n | |
| z = x >> (32 - n) | |
| return (y | z) & 0xffffffff | |
| def make_array(s): | |
| v = [s[i: i+2] for i in range(0, len(s), 2)] |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import requests | |
| def make_blocks(s): | |
| return [s[i:i+16] for i in xrange(0, len(s), 16)] | |
| def xor(a, b): | |
| return "".join([chr(ord(a[i]) ^ ord(b[i % len(b)])) for i in xrange(len(a))]) | |
| def decrypt(target): | |
| prefix = "578ae51334b467aa99092c00e57ff977168f922a.4f3a3680afa88ae056e5c56fb67544ff03e5b64f4174f1752ab93ac24a78257fc173ab2f339436453e9163265fd23707" |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import socket | |
| import hashlib | |
| import itertools | |
| def hash_solve(s): | |
| charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" | |
| for i in range(5): | |
| for j in itertools.product(charset, repeat=i): | |
| test = "".join(j) | |
| h = hashlib.md5(test).hexdigest().strip() |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # -*- coding:utf-8 -*- | |
| # 0CTF 2016: RSA? (Crypto 2pt) | |
| ''' | |
| # openssl rsa -in public.pem -pubin -text -modulus | |
| Public-Key: (314 bit) | |
| Modulus: | |
| 02:ca:a9:c0:9d:c1:06:1e:50:7e:5b:7f:39:dd:e3: | |
| 45:5f:cf:e1:27:a2:c6:9b:62:1c:83:fd:9d:3d:3e: | |
| aa:3a:ac:42:14:7c:d7:18:8c:53 |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # Sharif University CTF 2016: High-speed RSA Keygen [Part2] | |
| def egcd(a, b): | |
| if (a == 0): | |
| return [b, 0, 1] | |
| else: | |
| g, y, x = egcd(b % a, a) | |
| return [g, x - (b // a) * y, y] | |
| def modInv(a, m): |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # SECCON CTF 2015 Online Quals Find the prime numbers (Crypto 200pt) | |
| def egcd(a, b): | |
| if (a == 0): | |
| return [b, 0, 1] | |
| else: | |
| g, y, x = egcd(b % a, a) | |
| return [g, x - (b // a) * y, y] | |
| # Modular multiplicative inverse |
OlderNewer