Decrypt without importing key to keyring

[Francis Le Roy]

Hi, is there a way to use a private key (PGP) to decrypt a message
without adding it to the keyring. I don't want the private key to be
written on the disk. I'm using gpgme in a C++ and I can't figure out
'transform' a gpgme_data_t object into gpgme_key_t without using the
gpgme_op_import function.

Thanks.

F.