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 decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = openssl.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ecc._decode_pubkey(data[i:])
i += i2
data = data[i:]
key = self.raw_get_ecdh_key(pubkey_x, pubkey_y)
ctx = cipher(key, iv, 0, ciphername)
return ctx.ciphering(data)
