refactor(measured-boot): add generic macros for using Crypto library
It doesn't look correct to use mbed TLS defines directly in the Event
Log driver as this driver may use another Crypto library in future.
Hence mbed TLS Crypto dependency on Event Log driver is removed by
introducing generic Crypto defines and uses those in the Event Log
driver to call Crypto functions.
Also, updated mbed TLS glue layer to map these generic Crypto defines
to mbed TLS library defines.
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ibc9c751f60cbce4d3f3cf049b7c53b3d05cc6735
diff --git a/drivers/measured_boot/event_log/event_log.c b/drivers/measured_boot/event_log/event_log.c
index 52ed278..792f235 100644
--- a/drivers/measured_boot/event_log/event_log.c
+++ b/drivers/measured_boot/event_log/event_log.c
@@ -13,10 +13,19 @@
#include <common/debug.h>
#include <drivers/auth/crypto_mod.h>
#include <drivers/measured_boot/event_log/event_log.h>
-#include <mbedtls/md.h>
#include <plat/common/platform.h>
+#if TPM_ALG_ID == TPM_ALG_SHA512
+#define CRYPTO_MD_ID CRYPTO_MD_SHA512
+#elif TPM_ALG_ID == TPM_ALG_SHA384
+#define CRYPTO_MD_ID CRYPTO_MD_SHA384
+#elif TPM_ALG_ID == TPM_ALG_SHA256
+#define CRYPTO_MD_ID CRYPTO_MD_SHA256
+#else
+# error Invalid TPM algorithm.
+#endif /* TPM_ALG_ID */
+
/* Running Event Log Pointer */
static uint8_t *log_ptr;
@@ -245,7 +254,7 @@
int event_log_measure_and_record(uintptr_t data_base, uint32_t data_size,
uint32_t data_id)
{
- unsigned char hash_data[MBEDTLS_MD_MAX_SIZE];
+ unsigned char hash_data[CRYPTO_MD_MAX_SIZE];
int rc;
const event_log_metadata_t *metadata_ptr = plat_metadata_ptr;
@@ -257,8 +266,8 @@
assert(metadata_ptr->id != EVLOG_INVALID_ID);
/* Calculate hash */
- rc = crypto_mod_calc_hash((unsigned int)MBEDTLS_MD_ID,
- (void *)data_base, data_size, hash_data);
+ rc = crypto_mod_calc_hash(CRYPTO_MD_ID,
+ (void *)data_base, data_size, hash_data);
if (rc != 0) {
return rc;
}