scd: Support OpenPGP card V3 for RSA.
* scd/app-openpgp.c (struct app_local_s): Remove max_cmd_data and max_rsp_data fields as Extended Capabilities bits are different. (get_cached_data) Use extcap.max_certlen_3. (get_one_do): Don't use exmode=1. (determine_rsa_response): New. (get_public_key, do_genkey): Call determine_rsa_response. (do_sign): Use keyattr[0].rsa.n_bits / 8, instead of max_rsp_data. (do_auth): Use keyattr[2].rsa.n_bits / 8, instead of max_rsp_data. (do_decipher): Likewise with Use keyattr[1].rsa.n_bits / 8. (show_caps): Remove max_cmd_data and max_rsp_data. (app_select_openpgp): Likewise.
OpenPGP card V3 had introduced incompatible change in Extended
Capabilities bits. We can work around by this change by not
using those bits.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>