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Code Activity

scd: Clear CHV status on timeout error.

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* scd/app-openpgp.c (clear_chv_status): New.
(do_change_pin): Use clear_chv_status.
(do_sign): Call clear_chv_status on GPG_ERR_TIMEOUT.
(do_auth, do_decipher): Likewise.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2019-02-21 15:50:43 +09:00
parent bd15aa34ab
commit 2013cb5ee6
1 changed files with 45 additions and 34 deletions
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79
scd/app-openpgp.c
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@ -2568,6 +2568,42 @@ do_writecert (app_t app, ctrl_t ctrl,
}
static gpg_error_t
clear_chv_status (app_t app, int chvno)
{
unsigned char apdu[4];
gpg_error_t err;
if (!app->app_local->extcap.is_v2)
return GPG_ERR_UNSUPPORTED_OPERATION;
apdu[0] = 0x00;
apdu[1] = ISO7816_VERIFY;
apdu[2] = 0xff;
apdu[3] = 0x80+chvno;
err = iso7816_apdu_direct (app->slot, apdu, 4, 0, NULL, NULL, NULL);
if (err)
{
if (gpg_err_code (err) == GPG_ERR_INV_VALUE)
err = gpg_error (GPG_ERR_UNSUPPORTED_OPERATION);
return err;
}
if (chvno == 1)
{
apdu[3]++;
err = iso7816_apdu_direct (app->slot, apdu, 4, 0, NULL, NULL, NULL);
app->did_chv1 = app->did_chv2 = 0;
}
else if (chvno == 2)
app->did_chv2 = 0;
else if (chvno == 3)
app->did_chv3 = 0;
return err;
}
/* Handle the PASSWD command. The following combinations are
possible:
@ -2623,38 +2659,7 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
pininfo.minlen = minlen;
if ((flags & APP_CHANGE_FLAG_CLEAR))
{
unsigned char apdu[4];
if (!app->app_local->extcap.is_v2)
return GPG_ERR_UNSUPPORTED_OPERATION;
apdu[0] = 0x00;
apdu[1] = ISO7816_VERIFY;
apdu[2] = 0xff;
apdu[3] = 0x80+chvno;
rc = iso7816_apdu_direct (app->slot, apdu, 4, 0, NULL, NULL, NULL);
if (rc)
{
if (rc == GPG_ERR_INV_VALUE)
rc = GPG_ERR_UNSUPPORTED_OPERATION;
return rc;
}
if (chvno == 1)
{
apdu[3]++;
rc = iso7816_apdu_direct (app->slot, apdu, 4, 0, NULL, NULL, NULL);
app->did_chv1 = app->did_chv2 = 0;
}
else if (chvno == 2)
app->did_chv2 = 0;
else if (chvno == 3)
app->did_chv3 = 0;
return rc;
}
return clear_chv_status (app, chvno);
if (reset_mode && chvno == 3)
{
@ -4501,7 +4506,9 @@ do_sign (app_t app, const char *keyidstr, int hashalgo,
}
rc = iso7816_compute_ds (app->slot, exmode, data, datalen, le_value,
outdata, outdatalen);
if (!rc && app->force_chv1)
if (gpg_err_code (rc) == GPG_ERR_TIMEOUT)
clear_chv_status (app, 1);
else if (!rc && app->force_chv1)
app->did_chv1 = 0;
return rc;
@ -4610,6 +4617,8 @@ do_auth (app_t app, const char *keyidstr,
rc = iso7816_internal_authenticate (app->slot, exmode,
indata, indatalen, le_value,
outdata, outdatalen);
if (gpg_err_code (rc) == GPG_ERR_TIMEOUT)
clear_chv_status (app, 1);
}
return rc;
}
@ -4833,7 +4842,7 @@ do_decipher (app_t app, const char *keyidstr,
indata, indatalen, le_value, padind,
outdata, outdatalen);
xfree (fixbuf);
if (app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
if (!rc && app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
{
unsigned char prefix = 0;
@ -4857,6 +4866,8 @@ do_decipher (app_t app, const char *keyidstr,
*outdatalen = *outdatalen + 1;
}
}
if (gpg_err_code (rc) == GPG_ERR_TIMEOUT)
clear_chv_status (app, 1);
if (gpg_err_code (rc) == GPG_ERR_CARD /* actual SW is 0x640a */
&& app->app_local->manufacturer == 5