public
/ gist:8172501
Created
December 29, 2013 17:16
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| import cryptography.hazmat.backends | |
| b = cryptography.hazmat.backends.default_backend() | |
| print "%x" % b.lib.OPENSSL_VERSION_NUMBER | |
| print b.lib.EVP_get_cipherbyname("aes-128-gcm") | |
| diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py | |
| index 6231aad..ea43e30 100644 | |
| --- a/cryptography/hazmat/backends/openssl/backend.py | |
| +++ b/cryptography/hazmat/backends/openssl/backend.py | |
| @@ -154,7 +154,7 @@ class Backend(object): |
public
/ crypto_locking.py
Last active
January 1, 2016 10:39
Implement the OpenSSL locking callback in Python. It seems to work but is ~4x slower on PyPy and ~8x slower in CPython than using the C implementation from Modules/_ssl.py.
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| import thread | |
| import threading | |
| import itertools | |
| import cryptography.hazmat.backends | |
| b = cryptography.hazmat.backends.default_backend() | |
| # UNCOMMENT THIS TO POSSIBLY STOP CRASHES | |
| #import _ssl |
public
/ crypto_thread_crash.py
Created
December 24, 2013 15:00
Crashes quickly on my Ubuntu machine when _ssl is not imported and there at least 3 threads. Reducing threads or importing _ssl seems to work around the race. _ssl happens to setup locking callbacks OpenSSL wants to do multi-threading safely. I think this will still crash if we import a different OpenSSL to the one the Python implementation is l…
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| import thread | |
| import threading | |
| import struct | |
| import itertools | |
| import cryptography.hazmat.backends | |
| # UNCOMMENT THIS TO POSSIBLY STOP CRASHES | |
| #import _ssl |
public
/ gist:8052415
Last active
December 31, 2015 22:19
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| cryptography/hazmat/backends/openssl/__pycache__/_cffi__xff7f7876x43e58bcb.c:4056:17: error: storage size of ‘x0’ isn’t known |
public
/ gist:8042219
Created
December 19, 2013 16:38
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| import cffi | |
| isdefined_template = """ | |
| #include <openssl/opensslconf.h> | |
| char cryptography_isdefined_{0}() {{ | |
| #ifdef {0} | |
| return 1; | |
| #else | |
| return 0; |
public
/ breach.py
Last active
December 21, 2015 16:49
Ghetto BREACH attack against itsdangerous cookies. This is kind of like attacking an itsdangerous cookie over a TLS connection using a stream cipher. Just uses the lengths of the cookies to determine the contents of a secret value. Things rapidly get more complicated in more realistic situations. e.g. if the cookie is more complex its hard to pi…
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| import os | |
| from binascii import hexlify | |
| import json | |
| import itsdangerous | |
| import random | |
| secret = hexlify(os.urandom(160/8)) | |
| #secret = "4e0f4e0bbd859501d57460168babbe9bda0f9e77" | |
| serializer = itsdangerous.URLSafeSerializer("SECRET") | |
| session = { |
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| home@alex:~$ awk '/ 1$/{print $1}' < numdeps | xargs apt-cache show | grep Original-Maintainer | sort | uniq -c | sort -k1 -n | |
| 1 Original-Maintainer: "Adam C. Powell, IV" <[email protected]> | |
| 1 Original-Maintainer: Adam C. Powell, IV <[email protected]> | |
| 1 Original-Maintainer: Adam Schmalhofer <[email protected]> | |
| 1 Original-Maintainer: Aleksey Kravchenko <[email protected]> | |
| 1 Original-Maintainer: Alexandre Fayolle <[email protected]> | |
| 1 Original-Maintainer: Al Stone <[email protected]> | |
| 1 Original-Maintainer: A Mennucc1 <[email protected]> | |
| 1 Original-Maintainer: Ana Beatriz Guerrero Lopez <[email protected]> | |
| 1 Original-Maintainer: Andrea Gasparini <[email protected]> |
public
/ virt-ip.sh
Created
August 1, 2013 09:14
Get the IP address of the named running KVM VM. ./virt-ip.sh YOUR-VM
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| #!/bin/sh | |
| grep $(virsh domiflist $1 | grep -vE '^((.)\2*)?$' | awk 'NR == 1 { for(i=1; i <= NF; i++) { if($i == "MAC") { MAC=i } } } NR > 1 { print $MAC }') /var/lib/libvirt/dnsmasq/default.leases | cut -d\ -f3 |
public
/ gist:5983421
Created
July 12, 2013 10:30
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| import Data.List | |
| import Math.NumberTheory.Primes.Sieve | |
| import Control.Monad | |
| import Debug.Trace | |
| numWays without p = | |
| let (poor, rich) = splitAt p without | |
| with = poor ++ |
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| def block(func, args): | |
| def decorator(f2): | |
| return func(f2, args) | |
| return decorator | |
| @block(map, range(10)) | |
| def square(x): | |
| return x**2 |