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scd: Disable pinpad if it's impossible by KDF DO.

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* scd/app-openpgp.c (struct app_local_s): Add pinpad.disabled field.
(do_getattr): Set pinpad.disabled field.
(check_pinpad_request): Use the pinpad.disabled field.
(do_setattr): Update pinpad.disabled field.

--

GnuPG-bug-id: 4832
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2020-02-17 17:44:59 +09:00
parent 6248739799
commit 95c7498b76
1 changed files with 30 additions and 7 deletions
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37
scd/app-openpgp.c
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@ -60,6 +60,8 @@
#include "../common/openpgpdefs.h"
#define KDF_DATA_LENGTH_MIN 90
#define KDF_DATA_LENGTH_MAX 110
/* The AID of this application. */
static char const openpgp_aid[] = { 0xD2, 0x76, 0x00, 0x01, 0x24, 0x01 };
@ -198,7 +200,7 @@ struct app_local_s {
unsigned int private_dos:1;
unsigned int algo_attr_change:1; /* Algorithm attributes changeable. */
unsigned int has_decrypt:1; /* Support symmetric decryption. */
unsigned int kdf_do:1; /* Support KDF DO. */
unsigned int kdf_do:1; /* Support KDF DO. */
unsigned int sm_algo:2; /* Symmetric crypto algo for SM. */
unsigned int pin_blk2:1; /* PIN block 2 format supported. */
@ -230,6 +232,7 @@ struct app_local_s {
/* Pinpad request specified on card. */
struct
{
unsigned int disabled:1; /* No pinpad use because of KDF DO. */
unsigned int specified:1;
int fixedlen_user;
int fixedlen_admin;
@ -1036,7 +1039,7 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
{ "UIF-1", 0x00D6, 0 },
{ "UIF-2", 0x00D7, 0 },
{ "UIF-3", 0x00D8, 0 },
{ "KDF", 0x00F9 },
{ "KDF", 0x00F9, 5 },
{ NULL, 0 }
};
int idx, i, rc;
@ -1161,11 +1164,25 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
for (i=0; i < 3; i++)
send_fprtime_if_not_null (ctrl, table[idx].name, i+1, value+i*4);
}
else if (table[idx].special == 5)
{
if ((valuelen == KDF_DATA_LENGTH_MIN
|| valuelen == KDF_DATA_LENGTH_MAX)
&& (value[2] == 0x03))
app->app_local->pinpad.disabled = 1;
else
app->app_local->pinpad.disabled = 0;
}
else
send_status_info (ctrl, table[idx].name, value, valuelen, NULL, 0);
xfree (relptr);
}
else
{
if (table[idx].special == 5)
app->app_local->pinpad.disabled = 0;
}
return rc;
}
@ -2069,6 +2086,9 @@ do_readcert (app_t app, const char *certid,
static int
check_pinpad_request (app_t app, pininfo_t *pininfo, int admin_pin)
{
if (app->app_local->pinpad.disabled)
return 1;
if (app->app_local->pinpad.specified == 0) /* No preference on card. */
{
if (pininfo->fixedlen == 0) /* Reader has varlen capability. */
@ -2163,9 +2183,6 @@ get_prompt_info (app_t app, int chvno, unsigned long sigcount, int remaining)
return result;
}
#define KDF_DATA_LENGTH_MIN 90
#define KDF_DATA_LENGTH_MAX 110
/* Compute hash if KDF-DO is available. CHVNO must be 0 for reset
* code, 1 or 2 for user pin and 3 for admin pin. PIN is the original
* PIN as entered by the user. R_PINVALUE and r_PINLEN will receive a
@ -2757,6 +2774,12 @@ do_setattr (app_t app, ctrl_t ctrl, const char *name,
app->did_chv1 = 0;
app->did_chv2 = 0;
app->did_chv3 = 0;
if ((valuelen == KDF_DATA_LENGTH_MIN || valuelen == KDF_DATA_LENGTH_MAX)
&& (value[2] == 0x03))
app->app_local->pinpad.disabled = 1;
else
app->app_local->pinpad.disabled = 0;
}
return rc;
@ -4689,8 +4712,8 @@ check_keyidstr (app_t app, const char *keyidstr, int keyno)
keygrip_str = app->app_local->pk[keyno?keyno-1:0].keygrip_str;
if (!strncmp (keygrip_str, keyidstr, 40))
return 0;
else
return gpg_error (GPG_ERR_INV_ID);
else
return gpg_error (GPG_ERR_INV_ID);
}
if (n != 32 || strncmp (keyidstr, "D27600012401", 12))