Source position: libnettle.pp line 1374
type Tpgp_symmetric_algorithm = (
PGP_PLAINTEXT = 0,
PGP_IDEA = 1,
PGP_3DES = 2,
PGP_CAST5 = 3,
PGP_BLOWFISH = 4,
PGP_SAFER_SK = 5,
PGP_AES128 = 7,
PGP_AES192 = 8,
PGP_AES256 = 9
);