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/* async-tls.c
*
* Copyright (C) 2006-2025 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* wolfSSL 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifndef WOLFSSL_USER_SETTINGS
#include <wolfssl/options.h>
#endif
#include <wolfssl/ssl.h>
#include <wolfssl/wolfio.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include "examples/async/async_tls.h"
/* ---------------------------------------------------------------------------*/
/* --- Example Crypto Callback --- */
/* ---------------------------------------------------------------------------*/
#ifdef WOLF_CRYPTO_CB
/* Example custom context for crypto callback */
#ifndef TEST_PEND_COUNT
#define TEST_PEND_COUNT 2
#endif
/* Example crypto dev callback function that calls software version */
/* This is where you would plug-in calls to your own hardware crypto */
int AsyncTlsCryptoCb(int devIdArg, wc_CryptoInfo* info, void* ctx)
{
int ret = WC_NO_ERR_TRACE(CRYPTOCB_UNAVAILABLE); /* bypass HW by default */
AsyncTlsCryptoCbCtx* myCtx = (AsyncTlsCryptoCbCtx*)ctx;
if (info == NULL)
return BAD_FUNC_ARG;
#ifdef DEBUG_CRYPTOCB
wc_CryptoCb_InfoString(info);
#endif
if (info->algo_type == WC_ALGO_TYPE_PK) {
#ifdef WOLFSSL_ASYNC_CRYPT
/* Test pending response */
if (info->pk.type == WC_PK_TYPE_RSA ||
info->pk.type == WC_PK_TYPE_EC_KEYGEN ||
info->pk.type == WC_PK_TYPE_ECDSA_SIGN ||
info->pk.type == WC_PK_TYPE_ECDSA_VERIFY ||
info->pk.type == WC_PK_TYPE_ECDH)
{
if (myCtx->pendingCount++ < TEST_PEND_COUNT) return WC_PENDING_E;
myCtx->pendingCount = 0;
}
#endif
#ifndef NO_RSA
if (info->pk.type == WC_PK_TYPE_RSA) {
/* set devId to invalid, so software is used */
info->pk.rsa.key->devId = INVALID_DEVID;
switch (info->pk.rsa.type) {
case RSA_PUBLIC_ENCRYPT:
case RSA_PUBLIC_DECRYPT:
/* perform software based RSA public op */
ret = wc_RsaFunction(
info->pk.rsa.in, info->pk.rsa.inLen,
info->pk.rsa.out, info->pk.rsa.outLen,
info->pk.rsa.type, info->pk.rsa.key, info->pk.rsa.rng);
break;
case RSA_PRIVATE_ENCRYPT:
case RSA_PRIVATE_DECRYPT:
/* perform software based RSA private op */
ret = wc_RsaFunction(
info->pk.rsa.in, info->pk.rsa.inLen,
info->pk.rsa.out, info->pk.rsa.outLen,
info->pk.rsa.type, info->pk.rsa.key, info->pk.rsa.rng);
break;
}
/* reset devId */
info->pk.rsa.key->devId = devIdArg;
}
#endif
#ifdef HAVE_ECC
if (info->pk.type == WC_PK_TYPE_EC_KEYGEN) {
/* set devId to invalid, so software is used */
info->pk.eckg.key->devId = INVALID_DEVID;
ret = wc_ecc_make_key_ex(info->pk.eckg.rng, info->pk.eckg.size,
info->pk.eckg.key, info->pk.eckg.curveId);
/* reset devId */
info->pk.eckg.key->devId = devIdArg;
}
else if (info->pk.type == WC_PK_TYPE_ECDSA_SIGN) {
/* set devId to invalid, so software is used */
info->pk.eccsign.key->devId = INVALID_DEVID;
ret = wc_ecc_sign_hash(
info->pk.eccsign.in, info->pk.eccsign.inlen,
info->pk.eccsign.out, info->pk.eccsign.outlen,
info->pk.eccsign.rng, info->pk.eccsign.key);
/* reset devId */
info->pk.eccsign.key->devId = devIdArg;
}
else if (info->pk.type == WC_PK_TYPE_ECDSA_VERIFY) {
/* set devId to invalid, so software is used */
info->pk.eccverify.key->devId = INVALID_DEVID;
ret = wc_ecc_verify_hash(
info->pk.eccverify.sig, info->pk.eccverify.siglen,
info->pk.eccverify.hash, info->pk.eccverify.hashlen,
info->pk.eccverify.res, info->pk.eccverify.key);
/* reset devId */
info->pk.eccverify.key->devId = devIdArg;
}
else if (info->pk.type == WC_PK_TYPE_ECDH) {
/* set devId to invalid, so software is used */
info->pk.ecdh.private_key->devId = INVALID_DEVID;
ret = wc_ecc_shared_secret(
info->pk.ecdh.private_key, info->pk.ecdh.public_key,
info->pk.ecdh.out, info->pk.ecdh.outlen);
/* reset devId */
info->pk.ecdh.private_key->devId = devIdArg;
}
#endif /* HAVE_ECC */
}
(void)devIdArg;
(void)myCtx;
return ret;
}
#endif /* WOLF_CRYPTO_CB */
/* ---------------------------------------------------------------------------*/
/* --- Example PK (Public Key) Callback --- */
/* ---------------------------------------------------------------------------*/
#ifdef HAVE_PK_CALLBACKS
#endif
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