* cipher/pubkey-internal.h (_gcry_rsa_pss_encode): Change the API.
* cipher/pubkey-util.c (_gcry_pk_util_data_to_mpi): Before the call to
_gcry_rsa_pss_encode, check the condition here, raise GPG_ERR_INV_ARG
if it's not good.
* cipher/rsa-common.c (_gcry_rsa_pss_encode): No check inside.