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esp-idf/components/wpa_supplicant/esp_supplicant/src/crypto/crypto_mbedtls-rsa.c

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wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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/*
wpa_supplicant: wps code updation Update WPS code with upstream. Also moved ESP specific code in another esp code folder.
2021-12-17 03:50:51 -05:00
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
*
wpa_supplicant: wps code updation Update WPS code with upstream. Also moved ESP specific code in another esp code folder.
2021-12-17 03:50:51 -05:00
* SPDX-License-Identifier: Apache-2.0
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
*/
#ifdef ESP_PLATFORM
#include "mbedtls/bignum.h"
#endif
#include "utils/includes.h"
#include "utils/common.h"
#include "crypto.h"
#include "common/defs.h"
wpa_supplicant: sync eap code with upstream
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#ifdef CONFIG_CRYPTO_MBEDTLS
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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#include "mbedtls/entropy.h"
#include "mbedtls/ctr_drbg.h"
#include <mbedtls/error.h>
#include <mbedtls/x509_crt.h>
#include <mbedtls/platform.h>
#include <mbedtls/sha256.h>
/* Dummy structures; these are just typecast to struct crypto_rsa_key */
struct crypto_public_key;
struct crypto_private_key;
wpa_supplicant: sync eap code with upstream
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#ifdef DEBUG_PRINT
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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static void crypto_dump_verify_info(u32 flags)
{
char dump_buffer[1024];
mbedtls_x509_crt_verify_info(dump_buffer, 1024, " ! ", flags );
wpa_printf(MSG_ERROR, "%s", dump_buffer);
}
wpa_supplicant: sync eap code with upstream
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#else
static void crypto_dump_verify_info(u32 flags) { }
#endif
static int crypto_rng_wrapper(void *ctx, unsigned char *buf, size_t len)
{
return os_get_random(buf, len);
}
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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int crypto_verify_cert(const u8 *cert_start, int certlen, const u8 *ca_cert_start, int ca_certlen)
{
int ret;
u32 flags = 0;
mbedtls_x509_crt *cert = os_zalloc(sizeof(mbedtls_x509_crt));
mbedtls_x509_crt *ca_cert = os_zalloc(sizeof(mbedtls_x509_crt));
if (!cert || !ca_cert) {
if (cert)
os_free(cert);
if (ca_cert)
os_free(ca_cert);
wpa_printf(MSG_ERROR, "%s: memory allocation failed", __func__);
return -1;
}
mbedtls_x509_crt_init(cert);
mbedtls_x509_crt_init(ca_cert);
ret = mbedtls_x509_crt_parse(cert, cert_start, certlen);
if (ret < 0) {
wpa_printf(MSG_ERROR, "peer cert parsing failed");
goto cleanup;
}
ret = mbedtls_x509_crt_parse(ca_cert, ca_cert_start, ca_certlen);
if (ret < 0) {
wpa_printf(MSG_ERROR, "CA cert parsing failed");
goto cleanup;
}
ret = mbedtls_x509_crt_verify(cert, ca_cert, NULL, NULL, &flags, NULL, NULL );
/* Certification is failed, try to get some more info */
if (ret != 0)
crypto_dump_verify_info(flags);
cleanup:
mbedtls_x509_crt_free(cert);
mbedtls_x509_crt_free(ca_cert);
os_free(cert);
os_free(ca_cert);
return ret;
}
struct crypto_public_key * crypto_public_key_import(const u8 *key, size_t len)
{
int ret;
mbedtls_pk_context *pkey = os_zalloc(sizeof(*pkey));
if (!pkey)
return NULL;
mbedtls_pk_init(pkey);
ret = mbedtls_pk_parse_public_key(pkey, key, len);
if (ret < 0) {
wpa_printf(MSG_ERROR, "failed to parse public key");
os_free(pkey);
return NULL;
}
return (struct crypto_public_key *)pkey;
}
struct crypto_private_key * crypto_private_key_import(const u8 *key,
size_t len,
const char *passwd)
{
int ret;
mbedtls_pk_context *pkey = os_zalloc(sizeof(mbedtls_pk_context));
if (!pkey)
return NULL;
mbedtls_pk_init(pkey);
wpa_supplicant: sync eap code with upstream
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ret = mbedtls_pk_parse_key(pkey, key, len, (const unsigned char *)passwd,
passwd ? os_strlen(passwd) : 0, crypto_rng_wrapper, NULL);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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if (ret < 0) {
wpa_printf(MSG_ERROR, "failed to parse private key");
os_free(pkey);
pkey = NULL;
}
return (struct crypto_private_key *)pkey;
}
struct crypto_public_key *crypto_public_key_from_cert(const u8 *buf,
size_t len)
{
int ret;
mbedtls_x509_crt *cert;
mbedtls_pk_context *kctx = os_zalloc(sizeof(*kctx));
if (!kctx) {
wpa_printf(MSG_ERROR, "failed to allocate memory");
return NULL;
}
cert = os_zalloc(sizeof(mbedtls_x509_crt));
if (!cert) {
wpa_printf(MSG_ERROR, "failed to allocate memory");
goto fail;
}
mbedtls_x509_crt_init(cert);
ret = mbedtls_x509_crt_parse(cert, buf, len);
if (ret < 0) {
wpa_printf(MSG_ERROR, "cert parsing failed");
goto fail;
}
mbedtls_pk_init(kctx);
if(mbedtls_pk_setup(kctx, mbedtls_pk_info_from_type(mbedtls_pk_get_type(&cert->pk))) != 0) {
wpa_printf(MSG_ERROR, "key setup failed");
goto fail;
}
ret = mbedtls_rsa_copy(mbedtls_pk_rsa(*kctx), mbedtls_pk_rsa(cert->pk));
if (ret < 0) {
wpa_printf(MSG_ERROR, "key copy failed");
goto fail;
}
cleanup:
mbedtls_x509_crt_free(cert);
os_free(cert);
return (struct crypto_public_key *)kctx;
fail:
os_free(kctx);
kctx = NULL;
goto cleanup;
}
int crypto_public_key_encrypt_pkcs1_v15(struct crypto_public_key *key,
const u8 *in, size_t inlen,
u8 *out, size_t *outlen)
{
int ret;
mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
const char *pers = "rsa_encrypt";
mbedtls_entropy_context *entropy = os_zalloc(sizeof(*entropy));
mbedtls_ctr_drbg_context *ctr_drbg = os_zalloc(sizeof(*ctr_drbg));
if (!pkey || !entropy || !ctr_drbg) {
if (entropy)
os_free(entropy);
if (ctr_drbg)
os_free(ctr_drbg);
wpa_printf(MSG_ERROR, "failed to allocate memory");
return -1;
}
mbedtls_entropy_init( entropy );
mbedtls_ctr_drbg_init( ctr_drbg );
ret = mbedtls_ctr_drbg_seed( ctr_drbg, mbedtls_entropy_func,
entropy, (const unsigned char *) pers,
strlen( pers ) );
if( ret != 0 ) {
wpa_printf(MSG_ERROR, " failed ! mbedtls_ctr_drbg_seed returned %d",
ret );
goto cleanup;
}
ret = mbedtls_rsa_pkcs1_encrypt(mbedtls_pk_rsa(*pkey), mbedtls_ctr_drbg_random,
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ctr_drbg, inlen, in, out);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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if(ret != 0) {
wpa_printf(MSG_ERROR, " failed ! mbedtls_rsa_pkcs1_encrypt returned -0x%04x", -ret);
goto cleanup;
}
wpa_supplicant: sync eap code with upstream
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*outlen = mbedtls_pk_rsa(*pkey)->MBEDTLS_PRIVATE(len);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
cleanup:
mbedtls_ctr_drbg_free( ctr_drbg );
mbedtls_entropy_free( entropy );
os_free(entropy);
os_free(ctr_drbg);
return ret;
}
int crypto_private_key_decrypt_pkcs1_v15(struct crypto_private_key *key,
const u8 *in, size_t inlen,
u8 *out, size_t *outlen)
{
int ret;
size_t i;
mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
const char *pers = "rsa_decrypt";
mbedtls_entropy_context *entropy = os_malloc(sizeof(*entropy));
mbedtls_ctr_drbg_context *ctr_drbg = os_malloc(sizeof(*ctr_drbg));
if (!pkey || !entropy || !ctr_drbg) {
if (entropy)
os_free(entropy);
if (ctr_drbg)
os_free(ctr_drbg);
return -1;
}
mbedtls_ctr_drbg_init( ctr_drbg );
mbedtls_entropy_init( entropy );
ret = mbedtls_ctr_drbg_seed(ctr_drbg, mbedtls_entropy_func,
entropy, (const unsigned char *) pers,
strlen(pers));
if (ret < 0)
goto cleanup;
wpa_supplicant: sync eap code with upstream
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i = mbedtls_pk_rsa(*pkey)->MBEDTLS_PRIVATE(len);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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ret = mbedtls_rsa_rsaes_pkcs1_v15_decrypt(mbedtls_pk_rsa(*pkey), mbedtls_ctr_drbg_random,
wpa_supplicant: sync eap code with upstream
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ctr_drbg, &i, in, out, *outlen);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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*outlen = i;
cleanup:
mbedtls_ctr_drbg_free( ctr_drbg );
mbedtls_entropy_free( entropy );
os_free(entropy);
os_free(ctr_drbg);
return ret;
}
int crypto_private_key_sign_pkcs1(struct crypto_private_key *key,
const u8 *in, size_t inlen,
u8 *out, size_t *outlen)
{
int ret;
wpa_supplicant: sync eap code with upstream
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const char *pers = "rsa_encrypt";
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
wpa_supplicant: sync eap code with upstream
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mbedtls_entropy_context *entropy = os_malloc(sizeof(*entropy));
mbedtls_ctr_drbg_context *ctr_drbg = os_malloc(sizeof(*ctr_drbg));
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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wpa_supplicant: sync eap code with upstream
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if (!pkey || !entropy || !ctr_drbg) {
if (entropy)
os_free(entropy);
if (ctr_drbg)
os_free(ctr_drbg);
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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return -1;
}
wpa_supplicant: sync eap code with upstream
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mbedtls_ctr_drbg_init( ctr_drbg );
mbedtls_entropy_init( entropy );
ret = mbedtls_ctr_drbg_seed(ctr_drbg, mbedtls_entropy_func,
entropy, (const unsigned char *) pers,
strlen(pers));
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
wpa_supplicant: sync eap code with upstream
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if((ret = mbedtls_rsa_pkcs1_sign(mbedtls_pk_rsa(*pkey), mbedtls_ctr_drbg_random, ctr_drbg,
(mbedtls_pk_rsa(*pkey))->MBEDTLS_PRIVATE(hash_id),
inlen, in, out)) != 0 ) {
wpa_printf(MSG_ERROR, " failed ! mbedtls_rsa_pkcs1_sign returned %d", ret );
goto cleanup;
}
*outlen = mbedtls_pk_rsa(*pkey)->MBEDTLS_PRIVATE(len);
cleanup:
mbedtls_ctr_drbg_free( ctr_drbg );
mbedtls_entropy_free( entropy );
os_free(entropy);
os_free(ctr_drbg);
return ret;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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}
void crypto_public_key_free(struct crypto_public_key *key)
{
mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
if (!pkey)
return;
mbedtls_pk_free(pkey);
os_free(pkey);
}
void crypto_private_key_free(struct crypto_private_key *key)
{
mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
if (!pkey)
return;
mbedtls_pk_free(pkey);
os_free(pkey);
}
int crypto_public_key_decrypt_pkcs1(struct crypto_public_key *key,
const u8 *crypt, size_t crypt_len,
u8 *plain, size_t *plain_len)
{
wpa_supplicant: sync eap code with upstream
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size_t len;
u8 *pos;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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mbedtls_pk_context *pkey = (mbedtls_pk_context *)key;
esp_wifi:added hash key length validation
2022-09-29 07:20:23 -04:00
len = mbedtls_pk_rsa(*pkey)->MBEDTLS_PRIVATE(len);
if (len != crypt_len) {
return -1;
}
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
wpa_supplicant: sync eap code with upstream
2022-05-13 00:57:47 -04:00
if (mbedtls_rsa_public(mbedtls_pk_rsa(*pkey), crypt, plain) < 0)
return -1;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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wpa_supplicant: sync eap code with upstream
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/*
* PKCS #1 v1.5, 8.1:
*
* EB = 00 || BT || PS || 00 || D
* BT = 00 or 01
* PS = k-3-||D|| times (00 if BT=00) or (FF if BT=01)
* k = length of modulus in octets
*
* Based on 10.1.3, "The block type shall be 01" for a signature.
*/
if (len < 3 + 8 + 16 /* min hash len */ ||
plain[0] != 0x00 || plain[1] != 0x01) {
wpa_printf(MSG_INFO, "LibTomCrypt: Invalid signature EB "
"structure");
wpa_hexdump_key(MSG_DEBUG, "Signature EB", plain, len);
return -1;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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}
wpa_supplicant: sync eap code with upstream
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pos = plain + 3;
/* BT = 01 */
if (plain[2] != 0xff) {
wpa_printf(MSG_INFO, "LibTomCrypt: Invalid signature "
"PS (BT=01)");
wpa_hexdump_key(MSG_DEBUG, "Signature EB", plain, len);
return -1;
}
while (pos < plain + len && *pos == 0xff)
pos++;
if (pos - plain - 2 < 8) {
/* PKCS #1 v1.5, 8.1: At least eight octets long PS */
wpa_printf(MSG_INFO, "LibTomCrypt: Too short signature "
"padding");
wpa_hexdump_key(MSG_DEBUG, "Signature EB", plain, len);
return -1;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
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}
wpa_supplicant: sync eap code with upstream
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if (pos + 16 /* min hash len */ >= plain + len || *pos != 0x00) {
wpa_printf(MSG_INFO, "LibTomCrypt: Invalid signature EB "
"structure (2)");
wpa_hexdump_key(MSG_DEBUG, "Signature EB", plain, len);
return -1;
}
pos++;
len -= pos - plain;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
wpa_supplicant: sync eap code with upstream
2022-05-13 00:57:47 -04:00
/* Strip PKCS #1 header */
os_memmove(plain, pos, len);
*plain_len = len;
return 0;
wpa_supplicant: Replace internal RSA APIs by mbedtls APIs Curretly wpa_supplicant uses internal APIs for RSA operations which internally uses lots of big num operations. Big num operations are CPU expensive and can take a lot of time which can cause watchdog timer to tigger. This can be optimize by using mbedtls APIs which uses hardware blocks for big num operations. To fix this, write new crypto_mbedtls-rsa.c which has APIs similar to crypto_internal-rsa.c but uses mbedtls APIs.
2020-03-17 09:24:30 -04:00
}
#endif
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