Pass options to pgp_sym_encrypt

[SiddharthPant]

pgp_sym_encrypt function supports certain options. For example by default it uses AES128 algorithm to encrypt but you can customize pgp_sym_encrypt(data, psw, 'compress-algo=1, cipher-algo=aes256'). Is there a way I can provide the cipher-algo option with value AES256 when I create CharPGPSymmetricKeyField or maybe in the settings file? If there is not then could there please be an enhancement that can be made for this?

[peterfarrell]

@SiddharthPant It's currently not configurable in this package but a PR would be welcome.

[peterfarrell]

This is also related to #89

[9mido]

@peterfarrell

What if you did something like this:

>>> ("pgp_sym_encrypt(%s, '{}', '{}')::%s" % ("foo", "bar")).format(2, 3)
"pgp_sym_encrypt(foo, '2', '3')::bar"

.format picks up the {}, % picks up the %s