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p11-getslotlist.c
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/* p11-getslotlist.c - Cryptoki implementation.
* Copyright (C) 2006 g10 Code GmbH
*
* This file is part of Scute.
*
* Scute is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Scute is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <https://gnu.org/licenses/>.
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include "cryptoki.h"
#include "locking.h"
#include "slots.h"
/* Return the list of available slots. With TOKENPRESENT set only
* slots with a present tokens are returned. If PSLOTLIST is NULL the
* function only counts the number of slots and stores that number at
* PULCOUNT. Further this also updates the internal state and thus
* this needs to be called to check for new devices. If PSLOTLIST is
* not NULL it must point to an array which receives the slot
* information. PULCOUNT must point to a variable which initially
* holds the number of allocated slot items and will be updated on
* return to the stored number of slot items.
*/
CK_RV CK_SPEC
C_GetSlotList (CK_BBOOL tokenPresent, CK_SLOT_ID_PTR pSlotList,
CK_ULONG_PTR pulCount)
{
CK_RV err = CKR_OK;
CK_ULONG left;
slot_iterator_t slot;
if (pulCount == NULL_PTR)
return CKR_ARGUMENTS_BAD;
err = scute_global_lock ();
if (err)
return err;
if (pSlotList == NULL_PTR)
{
err = slots_update_all ();
if (err)
goto out;
}
/* Leave LEFT positive for the whole search when only counting. */
left = pSlotList ? *pulCount : 1;
*pulCount = 0;
err = slots_iterate_first (&slot);
if (err)
goto out;
while (!slots_iterate_last (&slot) && left && !err)
{
if (!tokenPresent || slot_token_present (slot))
{
(*pulCount)++;
if (pSlotList)
{
*(pSlotList++) = slot_get_id (slot);
left--;
}
}
err = slots_iterate_next (&slot);
}
if (err)
goto out;
if (!slots_iterate_last (&slot) && !left)
{
err = CKR_BUFFER_TOO_SMALL;
goto out;
}
out:
scute_global_unlock ();
return err;
}

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