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gpg: Add sub-command "factory-reset" to --card-edit.

Browse Source 
* common/util.h (GPG_ERR_OBJ_TERM_STATE): New.
* scd/iso7816.c (map_sw): Add this error code.
* scd/app-openpgp.c (do_getattr): Return the life cycle indicator.
* scd/app.c (select_application): Allow a return value of
GPG_ERR_OBJ_TERM_STATE.
* scd/scdaemon.c (set_debug): Print the DBG_READER value.
* g10/call-agent.c (start_agent): Print a status line for the
termination state.
(agent_scd_learn): Make arg "info" optional.
(agent_scd_apdu): New.
* g10/card-util.c (send_apdu): New.
(factory_reset): New.
(card_edit): Add command factory-reset.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2014-12-15 17:38:40 +01:00
parent fc9a35d2de
commit dd65e21cb4
10 changed files with 252 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
common/util.h
View File

@ -38,7 +38,8 @@
/* These error codes are used but not defined in the required
libgpg-error version. Define them here. */
#if GPG_ERROR_VERSION_NUMBER < 0x011200 /* 1.18 */
# define GPG_ERR_FORBIDDEN 251
# define GPG_ERR_OBJ_TERM_STATE 225
# define GPG_ERR_FORBIDDEN 251
#endif

1
doc/DETAILS
View File

@ -765,6 +765,7 @@ pkd:0:1024:B665B1435F4C2 .... FF26ABB:
- 4 :: No card available
- 5 :: No card reader available
- 6 :: No card support available
- 7 :: Card is in termination state
*** SC_OP_FAILURE [<code>]
An operation on a smartcard definitely failed. Currently there is

69
g10/call-agent.c
View File

@ -343,6 +343,9 @@ start_agent (ctrl_t ctrl, int for_card)
case GPG_ERR_NO_SCDAEMON:
write_status_text (STATUS_CARDCTRL, "6");
break;
case GPG_ERR_OBJ_TERM_STATE:
write_status_text (STATUS_CARDCTRL, "7");
break;
default:
write_status_text (STATUS_CARDCTRL, "4");
log_info ("selecting openpgp failed: %s\n", gpg_strerror (rc));
@ -586,6 +589,8 @@ learn_status_cb (void *opaque, const char *line)
parm->extcap.ki = abool;
else if (!strcmp (p, "aac"))
parm->extcap.aac = abool;
else if (!strcmp (p, "si"))
parm->status_indicator = strtoul (p2, NULL, 10);
}
}
xfree (buf);
@ -657,6 +662,9 @@ agent_scd_learn (struct agent_card_info_s *info)
struct default_inq_parm_s parm;
struct agent_card_info_s dummyinfo;
if (!info)
info = &dummyinfo;
memset (info, 0, sizeof *info);
memset (&parm, 0, sizeof parm);
rc = start_agent (NULL, 1);
@ -675,11 +683,7 @@ agent_scd_learn (struct agent_card_info_s *info)
if (rc)
return rc;
if (!info)
info = &dummyinfo;
parm.ctx = agent_ctx;
memset (info, 0, sizeof *info);
rc = assuan_transact (agent_ctx, "LEARN --sendinfo",
dummy_data_cb, NULL, default_inq_cb, &parm,
learn_status_cb, info);
@ -694,6 +698,63 @@ agent_scd_learn (struct agent_card_info_s *info)
}
/* Send an APDU to the current card. On success the status word is
stored at R_SW. With HEXAPDU being NULL only a RESET command is
send to scd. With HEXAPDU being the string "undefined" the command
"SERIALNO undefined" is send to scd. */
gpg_error_t
agent_scd_apdu (const char *hexapdu, unsigned int *r_sw)
{
gpg_error_t err;
/* Start the agent but not with the card flag so that we do not
autoselect the openpgp application. */
err = start_agent (NULL, 0);
if (err)
return err;
if (!hexapdu)
{
err = assuan_transact (agent_ctx, "SCD RESET",
NULL, NULL, NULL, NULL, NULL, NULL);
}
else if (!strcmp (hexapdu, "undefined"))
{
err = assuan_transact (agent_ctx, "SCD SERIALNO undefined",
NULL, NULL, NULL, NULL, NULL, NULL);
}
else
{
char line[ASSUAN_LINELENGTH];
membuf_t mb;
unsigned char *data;
size_t datalen;
init_membuf (&mb, 256);
snprintf (line, DIM(line)-1, "SCD APDU %s", hexapdu);
err = assuan_transact (agent_ctx, line,
membuf_data_cb, &mb, NULL, NULL, NULL, NULL);
if (!err)
{
data = get_membuf (&mb, &datalen);
if (!data)
err = gpg_error_from_syserror ();
else if (datalen < 2) /* Ooops */
err = gpg_error (GPG_ERR_CARD);
else
{
*r_sw = (data[datalen-2] << 8) | data[datalen-1];
}
xfree (data);
}
}
return err;
}
int
agent_keytocard (const char *hexgrip, int keyno, int force,
const char *serialno, const char *timestamp)

4
g10/call-agent.h
View File

@ -61,6 +61,7 @@ struct agent_card_info_s
unsigned int ki:1; /* Key import available. */
unsigned int aac:1; /* Algorithm attributes are changeable. */
} extcap;
unsigned int status_indicator;
};
struct agent_card_genkey_s {
@ -78,6 +79,9 @@ void agent_release_card_info (struct agent_card_info_s *info);
/* Return card info. */
int agent_scd_learn (struct agent_card_info_s *info);
/* Send an APDU to the card. */
gpg_error_t agent_scd_apdu (const char *hexapdu, unsigned int *r_sw);
/* Update INFO with the attribute NAME. */
int agent_scd_getattr (const char *name, struct agent_card_info_s *info);

172
g10/card-util.c
View File

@ -1635,6 +1635,169 @@ card_store_subkey (KBNODE node, int use)
}
/* Direct sending of an hex encoded APDU with error printing. */
static gpg_error_t
send_apdu (const char *hexapdu, const char *desc, unsigned int ignore)
{
gpg_error_t err;
unsigned int sw;
err = agent_scd_apdu (hexapdu, &sw);
if (err)
tty_printf ("sending card command %s failed: %s\n", desc,
gpg_strerror (err));
else if (!hexapdu || !strcmp (hexapdu, "undefined"))
;
else if (ignore == 0xffff)
; /* Ignore all status words. */
else if (sw != 0x9000)
{
switch (sw)
{
case 0x6285: err = gpg_error (GPG_ERR_OBJ_TERM_STATE); break;
case 0x6982: err = gpg_error (GPG_ERR_BAD_PIN); break;
case 0x6985: err = gpg_error (GPG_ERR_USE_CONDITIONS); break;
default: err = gpg_error (GPG_ERR_CARD);
}
if (!(ignore && ignore == sw))
tty_printf ("card command %s failed: %s (0x%04x)\n", desc,
gpg_strerror (err), sw);
}
return err;
}
/* Do a factory reset after confirmation. */
static void
factory_reset (void)
{
struct agent_card_info_s info;
gpg_error_t err;
char *answer = NULL;
int termstate = 0;
int i;
/* The code below basically does the same what this
gpg-connect-agent script does:
scd reset
scd serialno undefined
scd apdu 00 A4 04 00 06 D2 76 00 01 24 01
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 e6 00 00
scd reset
scd serialno undefined
scd apdu 00 A4 04 00 06 D2 76 00 01 24 01
scd apdu 00 44 00 00
/echo Card has been reset to factory defaults
but tries to find out something about the card first.
*/
err = agent_scd_learn (&info);
if (gpg_err_code (err) == GPG_ERR_OBJ_TERM_STATE
&& gpg_err_source (err) == GPG_ERR_SOURCE_SCD)
termstate = 1;
else if (err)
{
log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (err));
return;
}
if (!termstate)
{
log_info (_("OpenPGP card no. %s detected\n"),
info.serialno? info.serialno : "[none]");
if (!(info.status_indicator == 3 || info.status_indicator == 5))
{
/* Note: We won't see status-indicator 3 here because it is not
possible to select a card application in termination state. */
log_error (_("This command is not supported by this card\n"));
goto leave;
}
tty_printf ("\n");
log_info (_("Note: This command destroys all keys stored on the card!\n"));
tty_printf ("\n");
if (!cpr_get_answer_is_yes ("cardedit.factory-reset.proceed",
_("Continue? (y/N) ")))
goto leave;
answer = cpr_get ("cardedit.factory-reset.really",
_("Really do a factory reset? (enter \"yes\") "));
cpr_kill_prompt ();
trim_spaces (answer);
if (strcmp (answer, "yes"))
goto leave;
/* We need to select a card application before we can send APDUs
to the card without scdaemon doing anything on its own. */
err = send_apdu (NULL, "RESET", 0);
if (err)
goto leave;
err = send_apdu ("undefined", "dummy select ", 0);
if (err)
goto leave;
/* Select the OpenPGP application. */
err = send_apdu ("00A4040006D27600012401", "SELECT AID", 0);
if (err)
goto leave;
/* Do some dummy verifies with wrong PINs to set the retry
counter to zero. We can't easily use the card version 2.1
feature of presenting the admin PIN to allow the terminate
command because there is no machinery in scdaemon to catch
the verify command and ask for the PIN when the "APDU"
command is used. */
for (i=0; i < 4; i++)
send_apdu ("00200081084040404040404040", "VERIFY", 0xffff);
for (i=0; i < 4; i++)
send_apdu ("00200083084040404040404040", "VERIFY", 0xffff);
/* Send terminate datafile command. */
err = send_apdu ("00e60000", "TERMINATE DF", 0x6985);
if (err)
goto leave;
}
/* The card is in termination state - reset and select again. */
err = send_apdu (NULL, "RESET", 0);
if (err)
goto leave;
err = send_apdu ("undefined", "dummy select", 0);
if (err)
goto leave;
/* Select the OpenPGP application. (no error checking here). */
send_apdu ("00A4040006D27600012401", "SELECT AID", 0xffff);
/* Send activate datafile command. This is used without
confirmation if the card is already in termination state. */
err = send_apdu ("00440000", "ACTIVATE DF", 0);
if (err)
goto leave;
/* Finally we reset the card reader once more. */
err = send_apdu (NULL, "RESET", 0);
if (err)
goto leave;
leave:
xfree (answer);
agent_release_card_info (&info);
}
/* Data used by the command parser. This needs to be outside of the
function scope to allow readline based command completion. */
@ -1644,7 +1807,7 @@ enum cmdids
cmdQUIT, cmdADMIN, cmdHELP, cmdLIST, cmdDEBUG, cmdVERIFY,
cmdNAME, cmdURL, cmdFETCH, cmdLOGIN, cmdLANG, cmdSEX, cmdCAFPR,
cmdFORCESIG, cmdGENERATE, cmdPASSWD, cmdPRIVATEDO, cmdWRITECERT,
cmdREADCERT, cmdUNBLOCK,
cmdREADCERT, cmdUNBLOCK, cmdFACTORYRESET,
cmdINVCMD
};
@ -1676,6 +1839,7 @@ static struct
{ "passwd" , cmdPASSWD, 0, N_("menu to change or unblock the PIN")},
{ "verify" , cmdVERIFY, 0, N_("verify the PIN and list all data")},
{ "unblock" , cmdUNBLOCK,0, N_("unblock the PIN using a Reset Code") },
{ "factory-reset", cmdFACTORYRESET, 1, N_("destroy all keys and data")},
/* Note, that we do not announce these command yet. */
{ "privatedo", cmdPRIVATEDO, 0, NULL },
{ "readcert", cmdREADCERT, 0, NULL },
@ -1848,7 +2012,7 @@ card_edit (ctrl_t ctrl, strlist_t commands)
for (i=0; cmds[i].name; i++ )
if(cmds[i].desc
&& (!cmds[i].admin_only || (cmds[i].admin_only && allow_admin)))
tty_printf("%-10s %s\n", cmds[i].name, _(cmds[i].desc) );
tty_printf("%-14s %s\n", cmds[i].name, _(cmds[i].desc) );
break;
case cmdADMIN:
@ -1953,6 +2117,10 @@ card_edit (ctrl_t ctrl, strlist_t commands)
change_pin (1, allow_admin);
break;
case cmdFACTORYRESET:
factory_reset ();
break;
case cmdQUIT:
goto leave;

2
scd/apdu.h
View File

@ -53,7 +53,7 @@ enum {
SW_CLA_NOT_SUP = 0x6e00,
SW_SUCCESS = 0x9000,
/* The follwoing statuswords are no real ones but used to map host
/* The following statuswords are no real ones but used to map host
OS errors into status words. A status word is 16 bit so that
those values can't be issued by a card. */
SW_HOST_OUT_OF_CORE = 0x10001, /* No way yet to differentiate

7
scd/app-openpgp.c
View File

@ -1073,10 +1073,10 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
}
if (table[idx].special == -2)
{
char tmp[100];
char tmp[110];
snprintf (tmp, sizeof tmp,
"gc=%d ki=%d fc=%d pd=%d mcl3=%u aac=%d sm=%d",
"gc=%d ki=%d fc=%d pd=%d mcl3=%u aac=%d sm=%d si=%u",
app->app_local->extcap.get_challenge,
app->app_local->extcap.key_import,
app->app_local->extcap.change_force_chv,
@ -1085,7 +1085,8 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
app->app_local->extcap.algo_attr_change,
(app->app_local->extcap.sm_supported
? (app->app_local->extcap.sm_aes128? 7 : 2)
: 0));
: 0),
app->app_local->status_indicator);
send_status_info (ctrl, table[idx].name, tmp, strlen (tmp), NULL, 0);
return 0;
}

2
scd/app.c
View File

@ -389,7 +389,7 @@ select_application (ctrl_t ctrl, int slot, const char *name, app_t *r_app)
err = app_select_dinsig (app);
if (err && is_app_allowed ("sc-hsm") && (!name || !strcmp (name, "sc-hsm")))
err = app_select_sc_hsm (app);
if (err && name)
if (err && name && gpg_err_code (err) != GPG_ERR_OBJ_TERM_STATE)
err = gpg_error (GPG_ERR_NOT_SUPPORTED);
leave:

2
scd/iso7816.c
View File

@ -64,7 +64,7 @@ map_sw (int sw)
switch (sw)
{
case SW_EEPROM_FAILURE: ec = GPG_ERR_HARDWARE; break;
case SW_TERM_STATE: ec = GPG_ERR_CARD; break;
case SW_TERM_STATE: ec = GPG_ERR_OBJ_TERM_STATE; break;
case SW_WRONG_LENGTH: ec = GPG_ERR_INV_VALUE; break;
case SW_SM_NOT_SUP: ec = GPG_ERR_NOT_SUPPORTED; break;
case SW_CC_NOT_SUP: ec = GPG_ERR_NOT_SUPPORTED; break;

5
scd/scdaemon.c
View File

@ -344,7 +344,7 @@ set_debug (const char *level)
gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
if (opt.debug)
log_info ("enabled debug flags:%s%s%s%s%s%s%s%s%s\n",
log_info ("enabled debug flags:%s%s%s%s%s%s%s%s%s%s\n",
(opt.debug & DBG_COMMAND_VALUE)? " command":"",
(opt.debug & DBG_MPI_VALUE )? " mpi":"",
(opt.debug & DBG_CRYPTO_VALUE )? " crypto":"",
@ -353,7 +353,8 @@ set_debug (const char *level)
(opt.debug & DBG_MEMSTAT_VALUE)? " memstat":"",
(opt.debug & DBG_HASHING_VALUE)? " hashing":"",
(opt.debug & DBG_ASSUAN_VALUE )? " assuan":"",
(opt.debug & DBG_CARD_IO_VALUE)? " cardio":"");
(opt.debug & DBG_CARD_IO_VALUE)? " cardio":"",
(opt.debug & DBG_READER_VALUE )? " reader":"");
}