AES is available out of the box, see example usage below. Though I would be interested to compare to native CommonCrypto as a benchmark...
import base64 import hashlib from Crypto import Random from Crypto.Cipher import AES class AESCipher(object): def __init__(self, key): self.bs = 32 self.key = hashlib.sha256(key.encode()).digest() def encrypt(self, raw): raw = self._pad(raw) iv = Random.new().read(AES.block_size) cipher = AES.new(self.key, AES.MODE_CBC, iv) return base64.b64encode(iv + cipher.encrypt(raw)) def decrypt(self, enc): enc = base64.b64decode(enc) iv = enc[:AES.block_size] cipher = AES.new(self.key, AES.MODE_CBC, iv) return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8') def _pad(self, s): return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs) @staticmethod def _unpad(s): return s[:-ord(s[len(s)-1:])] if __name__ == '__main__': # pragma: no cover aes = AESCipher('this is my key') plaintext = 'hello, I am very happy to meet you!' print 'plain =', plaintext ciphertext = aes.encrypt(plaintext) print 'cipher =', ciphertext plaintwo = aes.decrypt(ciphertext) print 'plain2 =', plaintwo
I'm new to Pythonista (it's awesome!) and was looking for a example using
ui.NavigationView. There was a simple example in the UI Tutorial at https://github.com/humberry/ui-tutorial that demonstrated the basics and was quite helpful. What I wanted to do was have a controller class for each view and a separate controller to handle the transitions. I also wanted to be able to try out the individual interfaces as I storyboard the app. So here it is... if you have ideas on how to make this better as an example let me know: