mirror of
https://github.com/wolfSSL/wolfssl.git
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rizlik
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* swdev_loader.c
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*
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* Copyright (C) 2006-2026 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* main-side loader for wc_swdev. */
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#include "swdev_loader.h"
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#include <wolfssl/wolfcrypt/error-crypt.h>
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#ifndef WOLF_CRYPTO_CB
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#error "wc_swdev loader requires WOLF_CRYPTO_CB"
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#endif
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/* resolved at link time from swdev.o */
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extern int wc_SwDev_Callback(int devId, wc_CryptoInfo* info, void* ctx);
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/* Init always (re)registers because wolfCrypt_Cleanup wipes the cryptocb
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* table; only the final Cleanup unregisters. */
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static wolfSSL_Atomic_Int swdev_refCount = WOLFSSL_ATOMIC_INITIALIZER(0);
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int wc_SwDev_Init(void)
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{
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int ret;
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ret = wc_CryptoCb_RegisterDevice(WC_SWDEV_ID, wc_SwDev_Callback, NULL);
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if (ret != 0)
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return ret;
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#ifdef WOLF_CRYPTO_CB_FIND
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wc_CryptoCb_SetDeviceFindCb(wc_SwDev_FindCb);
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#endif
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(void)wolfSSL_Atomic_Int_FetchAdd(&swdev_refCount, 1);
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return 0;
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}
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void wc_SwDev_Cleanup(void)
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{
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int my_refCount = wolfSSL_Atomic_Int_SubFetch(&swdev_refCount, 1);
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if (my_refCount == 0) {
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#ifdef WOLF_CRYPTO_CB_FIND
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wc_CryptoCb_SetDeviceFindCb(NULL);
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#endif
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wc_CryptoCb_UnRegisterDevice(WC_SWDEV_ID);
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}
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else if (my_refCount < 0) {
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/* called more times than Init; restore floor */
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(void)wolfSSL_Atomic_Int_AddFetch(&swdev_refCount, 1);
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}
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}
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#ifdef WOLF_CRYPTO_CB_FIND
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int wc_SwDev_FindCb(int currentId, int algoType)
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{
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(void)algoType;
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/* only redirect ops with no bound device; let others pass through */
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if (currentId == INVALID_DEVID)
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return WC_SWDEV_ID;
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return currentId;
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}
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#endif
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