def raw_encrypt(data, pubkey_x, pubkey_y, curve='sect283r1', ephemcurve=None, ciphername='aes-256-cbc'):
if ephemcurve == None: ephemcurve = curve
ephem = ecc(curve=ephemcurve)
key = ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)
pubkey = ephem.get_pubkey()
iv = openssl.rand(openssl.get_cipher(ciphername).get_blocksize())
ctx = cipher(key, iv, 1, ciphername)
return iv + pubkey + ctx.ciphering(data)
def gen_IV(ciphername):
cipher = openssl.get_cipher(ciphername)
return openssl.rand(cipher.get_blocksize())
