* iso7816.h (iso7816_verify_kp): Remove arguments of CHV and CHVLEN.
* iso7816.c (iso7816_verify_kp): Call apdu_keypad_verify. Only
handle thecase with PININFO.
(iso7816_verify): Call apdu_send_simple.
* app-openpgp.c (verify_a_chv, verify_chv3): Follow the change of
iso7816_verify_kp.
* app-nks.c (verify_pin): Likewise.
* app-dinsig.c (verify_pin): Likewise.
* apdu.c: Include "iso7816.h".
(struct reader_table_s): New memeber function keypad_verify.
Add fields verify_ioctl and modify_ioctl in pcsc.
(CM_IOCTL_GET_FEATURE_REQUEST, FEATURE_VERIFY_PIN_DIRECT)
(FEATURE_MODIFY_PIN_DIRECT): New.
(pcsc_control): New.
(control_pcsc_direct, control_pcsc_wrapped, control_pcsc)
(check_pcsc_keypad, pcsc_keypad_verify): New.
(ccid_keypad_verify, apdu_keypad_verify): New.
(new_reader_slot): Initialize with check_pcsc_keypad,
pcsc_keypad_verify, verify_ioctl and modify_ioctl.
(open_ct_reader): Initialize keypad_verify with NULL.
(open_ccid_reader): Initialize keypad_verify.
(open_rapdu_reader): Initialize keypad_verify with NULL.
(apdu_open_reader): Initialize pcsc_control.
* pcsc-wrapper.c (load_pcsc_driver): Initialize pcsc_control.
(handle_control): New.
(main): Handle the case 6 of handle_control.