raullenchai
/ w1q1.py
Created
March 27, 2012 18:45
Solve Week 1 Question 1 in Stanford Crypto Course
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| CT = ( '315c4eeaa8b5f8aaf9174145bf43e1784b8fa00dc71d885a804e5ee9fa40b16349c146fb778cdf2d3aff021dfff5b403b510d0d0455468aeb98622b137dae857553ccd8883a7bc37520e06e515d22c954eba5025b8cc57ee59418ce7dc6bc41556bdb36bbca3e8774301fbcaa3b83b220809560987815f65286764703de0f3d524400a19b159610b11ef3e','234c02ecbbfbafa3ed18510abd11fa724fcda2018a1a8342cf064bbde548b12b07df44ba7191d9606ef4081ffde5ad46a5069d9f7f543bedb9c861bf29c7e205132eda9382b0bc2c5c4b45f919cf3a9f1cb74151f6d551f4480c82b2cb24cc5b028aa76eb7b4ab24171ab3cdadb8356f', '32510ba9a7b2bba9b8005d43a304b5714cc0bb0c8a34884dd91304b8ad40b62b07df44ba6e9d8a2368e51d04e0e7b207b70b9b8261112bacb6c866a232dfe257527dc29398f5f3251a0d47e503c66e935de81230b59b7afb5f41afa8d661cb', '32510ba9aab2a8a4fd06414fb517b5605cc0aa0dc91a8908c2064ba8ad5ea06a029056f47a8ad3306ef5021eafe1ac01a81197847a5c68a1b78769a37bc8f4575432c198ccb4ef63590256e305cd3a9544ee4160ead45aef520489e7da7d835402bca670bda8eb775200b8dabbba246b130f040d8ec6447e2c767f3d30ed81ea2e4c1404e1315a1010e7229be6636aaa', '3f561ba9adb4b6ebec544 |
raullenchai
/ w1q2.py
Created
March 27, 2012 18:46
Solve Week 1 Question 2 in Stanford Crypto Course
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| CT = (210205973, 22795300, 58776750, 121262470, 264731963, 140842553, 242590528, 195244728, 86752752) | |
| P = 295075153L # about 2^28 | |
| class WeakPrng(object): | |
| def __init__(self, p, x, y): # generate seed with 56 bits of entropy | |
| self.p = p | |
| self.x = x | |
| self.y = y | |
| def next(self): |
raullenchai
/ TidyBib.py
Created
April 12, 2012 17:37
Remove Unreferenced Bibitems in Latex/Tex File
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| """ | |
| Remove Unreferenced Bibitems in Latex/Tex File | |
| Author: Raullen Chai | |
| Date: 2012-04-12 | |
| """ | |
| from random import * | |
| import re | |
| """ |
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| """ | |
| http://code.google.com/codejam/contest/351101/dashboard#s=p1 | |
| """ | |
| __author__ = 'Raullen' | |
| f = open('B-large-practice.in','r') | |
| N = int(f.readline()) |
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| """ | |
| http://code.google.com/codejam/contest/351101/dashboard#s=p2 | |
| """ | |
| __author__ = 'Raullen' | |
| codebook = { 'A': '2', 'B': '22', 'C': '222', | |
| 'D': '3', 'E': '33', 'F': '333', | |
| 'G': '4', 'H': '44', 'I': '444', | |
| 'J': '5', 'K': '55', 'L': '555', |
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| """ | |
| http://code.google.com/codejam/contest/351101/dashboard#s=p0 | |
| """ | |
| __author__ = 'Raullen' | |
| f = open('C-small-practice.in','r') | |
| N = int(f.readline()) | |
| g = open('res.out','w') | |
| res = list() |
raullenchai
/ katan.py
Created
May 11, 2012 22:09
Python Implementation of the KATAN Family of Block Ciphers
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| __author__ = 'Raullen' | |
| IR = ( | |
| 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, | |
| 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, | |
| 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, | |
| 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, | |
| 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, | |
| 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, | |
| 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, |
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| #include <stdio.h> | |
| /* | |
| Fork From http://www.cs.technion.ac.il/~orrd/KATAN/katan.c | |
| Reference BITSLICED implementations of: | |
| KATAN32, KATAN48, KATAN64, KTANTAN32, KTANTAN48 and KTANTAN64. | |
| Each of the 64 slices corresponds to a distinct instance. | |
| To work with a single instance, use values in {0,1} |
raullenchai
/ pyAES.py
Created
June 12, 2012 20:52
Python AES implementation (pasted from http://brandon.sternefamily.net/files/pyAES.txt)
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| #!/usr/bin/python2.5 | |
| # Copyright (c) 2007 Brandon Sterne | |
| # Licensed under the MIT license. | |
| # http://brandon.sternefamily.net/files/mit-license.txt | |
| # Python AES implementation | |
| import sys, hashlib, string, getpass | |
| from copy import copy | |
| from random import randint |
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| import math | |
| def isPerm(x): | |
| if math.log(len(x), 2)% 1 != 0: | |
| return False | |
| for i in range(len(x)): | |
| try: | |
| x.index(i) | |
| except ValueError: |
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