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scd:openpgp: Use shared fucntion for the dispserialno.

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* scd/app-openpgp.c (wipe_and_free): New.
(wipe_and_free_string): New.
(get_disp_serialno): Remove.  Replace callers by function
app_get_dispserialno.
(get_usage_string): New.
(send_keypair_info): Use new function.
--

The new function has the same behaviour.  The wipe functions are
not yet used.
This commit is contained in:
Werner Koch 2023-10-11 09:38:45 +02:00
parent fe683a1d7c
commit 10f8bb1671
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
1 changed files with 46 additions and 32 deletions
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78
scd/app-openpgp.c
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@ -351,6 +351,35 @@ do_deinit (app_t app)
}
/* This is a helper to do a wipememory followed by a free. In general
* we do not need this if the buffer has been allocated in secure
* memory. However at some places we can't make that sure and thus we
* better to an extra wipe here. */
static void
wipe_and_free (void *p, size_t len)
{
if (p)
{
if (len)
wipememory (p, len);
xfree (p);
}
}
/* Similar to wipe_and_free but assumes P is eitehr NULL or a proper
* string. */
static void
wipe_and_free_string (char *p)
{
if (p)
{
wipememory (p, strlen (p));
xfree (p);
}
}
/* Wrapper around iso7816_get_data which first tries to get the data
from the cache. With GET_IMMEDIATE passed as true, the cache is
bypassed. With TRY_EXTLEN extended lengths APDUs are use if
@ -1377,30 +1406,6 @@ get_disp_name (app_t app)
}
/* Return the pretty formatted serialnumber. On error NULL is
* returned. */
static char *
get_disp_serialno (app_t app)
{
char *serial = app_get_serialno (app);
/* For our OpenPGP cards we do not want to show the entire serial
* number but a nicely reformatted actual serial number. */
if (serial && strlen (serial) > 16+12)
{
memmove (serial, serial+16, 4);
serial[4] = ' ';
/* memmove (serial+5, serial+20, 4); */
/* serial[9] = ' '; */
/* memmove (serial+10, serial+24, 4); */
/* serial[14] = 0; */
memmove (serial+5, serial+20, 8);
serial[13] = 0;
}
return serial;
}
/* Return the number of remaining tries for the standard or the admin
* pw. Returns -1 on card error. */
static int
@ -2021,6 +2026,21 @@ get_public_key (app_t app, int keyno)
}
static const char *
get_usage_string (int keyno)
{
const char *usage;
switch (keyno)
{
case 0: usage = "sc"; break;
case 1: usage = "e"; break;
case 2: usage = "sa"; break;
default: usage = "-"; break;
}
return usage;
}
/* Send the KEYPAIRINFO back. KEY needs to be in the range [1,3].
This is used by the LEARN command. */
static gpg_error_t
@ -2039,13 +2059,7 @@ send_keypair_info (app_t app, ctrl_t ctrl, int key)
if (!app->app_local->pk[keyno].key)
goto leave; /* No such key - ignore. */
switch (keyno)
{
case 0: usage = "sc"; break;
case 1: usage = "e"; break;
case 2: usage = "sa"; break;
default: usage = ""; break;
}
usage = get_usage_string (keyno);
sprintf (idbuf, "OPENPGP.%d", keyno+1);
send_status_info (ctrl, "KEYPAIRINFO",
@ -2323,7 +2337,7 @@ get_prompt_info (app_t app, int chvno, unsigned long sigcount, int remaining)
{
char *serial, *disp_name, *rembuf, *tmpbuf, *result;
serial = get_disp_serialno (app);
serial = app_get_dispserialno (app, 0);
if (!serial)
return NULL;