The counter must return the same on decryption as it did on encryption, as you intuit, so, one (NOT SECURE AT ALL) way to do it is: >>> secret = os.urandom(16) >>> crypto = AES.new(os.urandom(32), AES.MODE_CTR, counter=lambda: secret) >>> encrypted = crypto.encrypt(“aaaaaaaaaaaaaaaa”) >>> print crypto.decrypt(encrypted) aaaaaaaaaaaaaaaa CTR is a block cipher, so the “16-at-a-time” constraint … Read more
If you have installed Xcode 4, try setting ARCHFLAGS before calling pip or easy_install: sudo bash export ARCHFLAGS=’-arch i386 -arch x86_64′ pip … The problem is that Xcode 4 has removed support for -arch ppc but the system Python 2.6 on Mac OS X 10.6 expects to build universal C extension modules with all three … Read more
Here is my implementation, and it works for me with some fixes. It enhances the alignment of the key and secret phrase with 32 bytes and IV to 16 bytes: import base64 import hashlib from Crypto import Random from Crypto.Cipher import AES class AESCipher(object): def __init__(self, key): self.bs = AES.block_size self.key = hashlib.sha256(key.encode()).digest() def encrypt(self, … Read more
You will have to implement OpenSSL’s EVP_BytesToKey, because that is what CryptoJS uses to derive the key and IV from the provided password, but pyCrypto only supports the key+IV type encryption. CryptoJS also generates a random salt which also must be send to the server. If the ciphertext object is converted to a string, then … Read more
To be honest, the characters “\n\n\n\n\n\n\n\n\n\n” don’t look that random to me. 😉 You are using AES in CBC mode. That requires length of plaintext and ciphertext to be always a multiple of 16 bytes. With the code you show, you should actually see an exception being raised when data passed to encrypt() does not … Read more
In order to make it work you need to convert key from str to tuple before decryption(ast.literal_eval function). Here is fixed code: import Crypto from Crypto.PublicKey import RSA from Crypto import Random import ast random_generator = Random.new().read key = RSA.generate(1024, random_generator) #generate pub and priv key publickey = key.publickey() # pub key export for exchange … Read more
The file include\pyport.h in Python installation directory does not have #include < stdint.h > anymore. This leaves intmax_t undefined. A workaround for Microsoft VC compiler is to force include stdint.h via OS environment variable CL: Open command prompt Setup VC environment by runing vcvars*.bat (choose file name depending on VC version and architecture) set CL=-FI”Full-Path\stdint.h” … Read more
PyCrypto does not support X.509 certificates. You must first extract the public key with the command: openssl x509 -inform pem -in mycert.pem -pubkey -noout > publickey.pem Then, you can use RSA.importKey on publickey.pem. If you don’t want or cannot use openssl, you can take the PEM X.509 certificate and do it in pure Python like … Read more
I had the same problem on my Mac when installing with pip. I then removed pycrypto and installed it again with easy_install, like this: pip uninstall pycrypto easy_install pycrypto also as Luke commented: If you have trouble running these commands, be sure to run them as admin (sudo) Hope this helps! EDIT: As winklerr correctly … Read more
If you don’t already have a C/C++ development environment installed that is compatible with the Visual Studio binaries distributed by Python.org, then you should stick to installing only pure Python packages or packages for which a Windows binary is available. Fortunately, there are PyCrypto binaries available for Windows: http://www.voidspace.org.uk/python/modules.shtml#pycrypto UPDATE: As @Udi suggests in the … Read more