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scd:nks: Get the PIN prompts right for the Signature Card
* scd/app-nks.c (get_dispserialno): Move more to the top. (do_getattr): Add $DISPSERIALNO and SERIALNO. Make CHV-STATUS work with NKS15. (verify_pin): Use dedicated min. PIN lengths. (parse_pwidstr): Support NKS15 -- GnuPG-bug-id: 4938 Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch
parent
5c29d25e6c
commit
aecc008acb
192
scd/app-nks.c
192
scd/app-nks.c
@ -52,7 +52,8 @@
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* | NKS | 0x00 | null - | - - | - - |
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* | | 0x01 | 0 3 | - - | - - |
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* | | 0x02 | 3 null | 15 3 | 15 null |
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* | | 0x03 | - 3 | null - | null - |
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* | | 0x03 | - 3 | null - | 3 - |
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* | | 0x04 | | null 0 | 3 3 |
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* | SIG | 0x00 | null - | - - | - - |
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* | | 0x01 | 0 null | - null | - null |
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* | | 0x02 | 3 null | 15 0 | 15 0 |
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@ -66,6 +67,7 @@
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* - The SIG_B is a Signature Card V2.0 with Brainpool curves.
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* Here the PIN 0x82 has been changed from the NULLPIN.
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* - The SIG_N is a Signature Card V2.0 with NIST curves.
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* The PIN was enabled using the TCOS Windows tool.
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*/
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#include <config.h>
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@ -223,6 +225,22 @@ all_zero_p (void *buffer, size_t length)
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}
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/* Return an allocated string with the serial number in a format to be
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* show to the user. May return NULL on malloc problem. */
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static char *
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get_dispserialno (app_t app)
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{
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char *result;
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/* We only need to strip the last zero which is not printed on the
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* card. */
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result = app_get_serialno (app);
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if (result && *result && result[strlen(result)-1] == '0')
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result[strlen(result)-1] = 0;
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return result;
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}
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/* Read the file with PKFID, assume it contains a public key and
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* return its keygrip in the caller provided 41 byte buffer R_GRIPSTR.
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* This works only for RSA card. For the Signature Card v2 ECC is
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@ -587,10 +605,12 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
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{ "$SIGNKEYID", 3 },
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{ "NKS-VERSION", 4 },
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{ "CHV-STATUS", 5 },
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{ NULL, 0 }
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{ "$DISPSERIALNO",6 },
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{ "SERIALNO", 0 }
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};
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gpg_error_t err = 0;
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int idx;
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char *p, *p2;
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char buffer[100];
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int nksver = app->app_local->nks_version;
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@ -598,13 +618,25 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
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if (err)
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return err;
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for (idx=0; table[idx].name && strcmp (table[idx].name, name); idx++)
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for (idx=0; (idx < DIM(table)
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&& ascii_strcasecmp (table[idx].name, name)); idx++)
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;
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if (!table[idx].name)
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if (!(idx < DIM (table)))
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return gpg_error (GPG_ERR_INV_NAME);
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switch (table[idx].special)
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{
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case 0: /* SERIALNO */
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{
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p = app_get_serialno (app);
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if (p)
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{
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send_status_direct (ctrl, "SERIALNO", p);
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xfree (p);
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}
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}
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break;
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case 1: /* $AUTHKEYID */
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{
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/* NetKey 3.0 cards define an authentication key but according
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@ -640,27 +672,58 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
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case 5: /* CHV-STATUS */
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{
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/* Returns: PW1.CH PW2.CH PW1.CH.SIG PW2.CH.SIG That are the
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two global passwords followed by the two SigG passwords.
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For the values, see the function get_chv_status. */
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/* FIXME: Check this for the NKS15!! */
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/* Return the status for the the PINs as described in the
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* table below. See the macros ISO7816_VERIFY_* for a list
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* for each slot. The order is
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*
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* | idx | name |
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* |-----+------------|
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* | 0 | PW1.CH |
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* | 1 | PW2.CH |
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* | 2 | PW1.CH.SIG |
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* | 3 | PW2.CH.SIG |
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*
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* See parse_pwidstr for details of the mapping.
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*/
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int tmp[4];
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/* We use a helper array so that we can control that there is
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no superfluous application switch. Note that PW2.CH.SIG
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really has the identifier 0x83 and not 0x82 as one would
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expect. */
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tmp[0] = get_chv_status (app, 0, 0x00);
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tmp[1] = get_chv_status (app, 0, 0x01);
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* no superfluous application switches. */
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if (app->app_local->nks_version == 15)
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{
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tmp[0] = get_chv_status (app, 0, 0x03);
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tmp[1] = get_chv_status (app, 0, 0x04);
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}
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else
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{
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tmp[0] = get_chv_status (app, 0, 0x00);
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tmp[1] = get_chv_status (app, 0, 0x01);
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}
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tmp[2] = get_chv_status (app, app->app_local->qes_app_id, 0x81);
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tmp[3] = get_chv_status (app, app->app_local->qes_app_id, 0x83);
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snprintf (buffer, sizeof buffer,
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"%d %d %d %d", tmp[0], tmp[1], tmp[2], tmp[3]);
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if (app->app_local->nks_version == 15)
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tmp[3] = get_chv_status (app, app->app_local->qes_app_id, 0x82);
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else
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tmp[3] = get_chv_status (app, app->app_local->qes_app_id, 0x83);
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snprintf (buffer, sizeof buffer, "%d %d %d %d",
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tmp[0], tmp[1], tmp[2], tmp[3]);
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send_status_info (ctrl, table[idx].name,
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buffer, strlen (buffer), NULL, 0);
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}
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break;
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case 6: /* $DISPSERIALNO */
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{
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p = app_get_serialno (app);
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p2 = get_dispserialno (app);
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if (p && p2 && strcmp (p, p2))
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send_status_info (ctrl, table[idx].name, p2, strlen (p2),
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NULL, (size_t)0);
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else /* No abbreviated S/N or identical to the full full S/N. */
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err = gpg_error (GPG_ERR_INV_NAME); /* No Abbreviated S/N. */
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xfree (p);
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xfree (p2);
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}
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break;
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default:
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err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
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@ -1092,22 +1155,6 @@ do_writekey (app_t app, ctrl_t ctrl,
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}
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/* Return an allocated string with the serial number in a format to be
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* show to the user. May return NULL on malloc problem. */
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static char *
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get_dispserialno (app_t app)
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{
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char *result;
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/* We only need to strip the last zero which is not printed on the
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* card. */
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result = app_get_serialno (app);
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if (result && *result && result[strlen(result)-1] == '0')
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result[strlen(result)-1] = 0;
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return result;
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}
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/* Return an allocated string to be used as prompt. Returns NULL on
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* malloc error. */
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static char *
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@ -1199,8 +1246,24 @@ verify_pin (app_t app, int pwid, const char *desc,
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memset (&pininfo, 0, sizeof pininfo);
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pininfo.fixedlen = -1;
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pininfo.minlen = 6;
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pininfo.maxlen = 16;
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/* FIXME: TCOS allows to read the min. and max. values - do this. */
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if (app->app_local->nks_version == 15)
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{
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if (app->app_local->active_nks_app == NKS_APP_NKS && pwid == 0x03)
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pininfo.minlen = 6;
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else if (app->app_local->active_nks_app == NKS_APP_ESIGN && pwid == 0x81)
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pininfo.minlen = 6;
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else
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pininfo.minlen = 8;
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pininfo.maxlen = 24;
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}
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else
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{
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/* For NKS3 we used these fixed values; let's keep this. */
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pininfo.minlen = 6;
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pininfo.maxlen = 16;
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}
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remaining = iso7816_verify_status (app_get_slot (app), pwid);
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nullpin = (remaining == ISO7816_VERIFY_NULLPIN);
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@ -1216,7 +1279,7 @@ verify_pin (app_t app, int pwid, const char *desc,
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{
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log_info ("nks: The NullPIN for PIN 0x%02x has not yet been changed\n",
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pwid);
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extrapromptline = _("Note: You need to change the PIN first!");
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extrapromptline = _("Note: PIN has not yet been enabled.");
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}
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if (!opt.disable_pinpad
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@ -1292,6 +1355,7 @@ do_sign (app_t app, ctrl_t ctrl, const char *keyidstr, int hashalgo,
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0x02, 0x01, 0x05, 0x00, 0x04, 0x14 };
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gpg_error_t err;
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int idx;
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int pwid;
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unsigned char kid;
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unsigned char data[83]; /* Must be large enough for a SHA-1 digest
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+ the largest OID prefix. */
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@ -1376,9 +1440,15 @@ do_sign (app_t app, ctrl_t ctrl, const char *keyidstr, int hashalgo,
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err = iso7816_manage_security_env (app_get_slot (app), 0x41, 0xB6,
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mse, sizeof mse);
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}
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/* Verify using PW1.CH. */
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/* We use the Global PIN 1 */
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if (app->app_local->nks_version == 15)
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pwid = 0x03;
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else
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pwid = 0x00;
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if (!err)
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err = verify_pin (app, 0, NULL, pincb, pincb_arg);
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err = verify_pin (app, pwid, NULL, pincb, pincb_arg);
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/* Compute the signature. */
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if (!err)
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err = iso7816_compute_ds (app_get_slot (app), 0, data, datalen, 0,
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@ -1465,6 +1535,7 @@ do_decipher (app_t app, ctrl_t ctrl, const char *keyidstr,
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goto leave;
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}
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/* We use the Global PIN 1 */
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if (app->app_local->nks_version == 15)
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pwid = 0x03;
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else
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@ -1488,33 +1559,42 @@ do_decipher (app_t app, ctrl_t ctrl, const char *keyidstr,
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* suitable as passphrase prompt on success. On success stores the
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* reference value for the password at R_PWID and a flag indicating
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* which app is to be used at R_NKS_APP_ID. If NEW_MODE is true, the
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* returned description is suitable for a new Password. Supported
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* values for PWIDSTR are:
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* returned description is suitable for a new password. Here is a
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* take mapping the PWIDSTR to the used PWIDs:
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*
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* PW1.CH - id 0x00 - Global password 1
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* PW2.CH - id 0x01 - Global password 2
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* PW1.CH.SIG - id 0x81 - SigG password 1
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* PW2.CH.SIG - id 0x83 - SigG password 2
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* | pwidstr | | NKS3 | NKS15 | IDKEY1 |
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* |------------+--------------+------+-------+--------|
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* | PW1.CH | Global PIN 1 | 0x00 | 0x03 | 0x00 |
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* | PW2.CH | Global PIN 2 | 0x01 | 0x04 | 0x01 |
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* | PW1.CH.SIG | SigG PIN 1 | 0x81 | 0x81 | - |
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* | PW2.CH.SIG | SigG PIN 2 | 0x83 | 0x82 | - |
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*
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* It is also possible to specify the PIN id directly but the prompts
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* are then not very descriptive (Use this for testing):
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* The names for PWIDSTR are taken from the NKS3 specs; the specs of
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* other cards use different names but we keep using the. PIN1 can be
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* used to unlock PIN2 and vice versa; for consistence with other
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* cards we name PIN2 a "PUK". The IDKEY card also features a Card
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* Reset Key (CR Key 0x01) which can also be used to reset PIN1.
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*
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* For testing it is possible to specify the PWID directly; the
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* prompts are then not very descriptive:
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*
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* NKS.0xnn - Switch to NKS and select id 0xnn
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* SIGG.0xnn - Switch to SigG and select id 0xnn
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* ESIGN.0xnn - Switch to ESIGN and select id 0xnn
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*/
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static const char *
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parse_pwidstr (const char *pwidstr, int new_mode
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, int *r_nks_app_id, int *r_pwid)
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parse_pwidstr (app_t app, const char *pwidstr, int new_mode,
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int *r_nks_app_id, int *r_pwid)
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{
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const char *desc;
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int nks15 = app->app_local->nks_version == 15;
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if (!pwidstr)
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desc = NULL;
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else if (!strcmp (pwidstr, "PW1.CH"))
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{
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*r_nks_app_id = NKS_APP_NKS;
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*r_pwid = 0x00;
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*r_pwid = nks15? 0x03 : 0x00;
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/* TRANSLATORS: Do not translate the "|*|" prefixes but keep
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them verbatim at the start of the string. */
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desc = (new_mode
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@ -1524,7 +1604,7 @@ parse_pwidstr (const char *pwidstr, int new_mode
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else if (!strcmp (pwidstr, "PW2.CH"))
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{
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*r_nks_app_id = NKS_APP_NKS;
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*r_pwid = 0x01;
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*r_pwid = nks15? 0x04 : 0x01;
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desc = (new_mode
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? _("|NP|Please enter a new PIN Unblocking Code (PUK) "
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"for the standard keys.")
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@ -1533,7 +1613,7 @@ parse_pwidstr (const char *pwidstr, int new_mode
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}
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else if (!strcmp (pwidstr, "PW1.CH.SIG"))
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{
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*r_nks_app_id = NKS_APP_SIGG;
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*r_nks_app_id = app->app_local->qes_app_id;
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*r_pwid = 0x81;
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desc = (new_mode
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? _("|N|Please enter a new PIN for the key to create "
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@ -1543,8 +1623,8 @@ parse_pwidstr (const char *pwidstr, int new_mode
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}
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else if (!strcmp (pwidstr, "PW2.CH.SIG"))
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{
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*r_nks_app_id = NKS_APP_SIGG;
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*r_pwid = 0x83; /* Yes, that is 83 and not 82. */
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*r_nks_app_id = app->app_local->qes_app_id;
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*r_pwid = nks15? 0x82 : 0x83;
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desc = (new_mode
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? _("|NP|Please enter a new PIN Unblocking Code (PUK) "
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"for the key to create qualified signatures.")
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@ -1619,7 +1699,7 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *pwidstr,
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pininfo.minlen = 6;
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pininfo.maxlen = 16;
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newdesc = parse_pwidstr (pwidstr, 1, &nks_app_id, &pwid);
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newdesc = parse_pwidstr (app, pwidstr, 1, &nks_app_id, &pwid);
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if (!newdesc)
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return gpg_error (GPG_ERR_INV_ID);
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@ -1682,12 +1762,12 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *pwidstr,
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err = gpg_error (GPG_ERR_BUG);
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goto leave;
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}
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desc = parse_pwidstr (altpwidstr, 0, &dummy1, &dummy2);
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desc = parse_pwidstr (app, altpwidstr, 0, &dummy1, &dummy2);
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}
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else
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{
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/* Regular change mode: Ask for the old PIN. */
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desc = parse_pwidstr (pwidstr, 0, &dummy1, &dummy2);
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desc = parse_pwidstr (app, pwidstr, 0, &dummy1, &dummy2);
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}
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prompt = make_prompt (app, remaining, desc, NULL);
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@ -1761,7 +1841,7 @@ do_check_pin (app_t app, ctrl_t ctrl, const char *pwidstr,
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(void)ctrl;
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desc = parse_pwidstr (pwidstr, 0, &nks_app_id, &pwid);
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desc = parse_pwidstr (app, pwidstr, 0, &nks_app_id, &pwid);
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if (!desc)
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return gpg_error (GPG_ERR_INV_ID);
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