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wc_Sha256Free checks lockDepth for Espressif RTOS

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This commit is contained in:
gojimmypi
2022-07-21 09:08:10 +02:00
parent bd28b52aaa
commit c60fae8731
1 changed files with 19 additions and 1 deletions
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20
wolfcrypt/src/sha256.c
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@ -84,6 +84,7 @@ on the specific device platform.
#endif
/* determine if we are using Espressif SHA hardware acceleration */
#undef WOLFSSL_USE_ESP32WROOM32_CRYPT_HASH_HW
#if defined(WOLFSSL_ESP32WROOM32_CRYPT) && \
!defined(NO_WOLFSSL_ESP32WROOM32_CRYPT_HASH)
/* define a single keyword for simplicity & readability
@ -93,7 +94,7 @@ on the specific device platform.
*/
#define WOLFSSL_USE_ESP32WROOM32_CRYPT_HASH_HW
#else
#undef USE_ESP32WROOM32_CRYPT_HASH
#undef WOLFSSL_USE_ESP32WROOM32_CRYPT_HASH_HW
#endif
/* fips wrapper calls, user can call direct */
@ -1734,6 +1735,23 @@ void wc_Sha256Free(wc_Sha256* sha256)
#ifdef WOLFSSL_IMXRT_DCP
DCPSha256Free(sha256);
#endif
/* Espressif embedded hardware acceleration specific: */
#if defined(WOLFSSL_USE_ESP32WROOM32_CRYPT_HASH_HW)
if (sha256->ctx.lockDepth > 0) {
/* probably due to unclean shutdown, error, or other problem.
*
* if you find yourself here, code needs to be cleaned up to
* properly release hardware. this init is only for handling
* the unexpected. by the time free is called, the hardware
* should have already been released (lockDepth = 0)
*/
InitSha256(sha256); /* unlock mutex, set mode to ESP32_SHA_INIT */
ESP_LOGE("sha256", "ERROR: hardware unlock needed in wc_Sha256Free");
}
else {
ESP_LOGV("sha256", "hardware unlock not needed in wc_Sha256Free");
}
#endif
}
#endif /* !defined(WOLFSSL_HAVE_PSA) || defined(WOLFSSL_PSA_NO_HASH) */