[api] Fix issue #11 (stse_compute_hash bug STSE_COMMAND_NOT_AUTHORIZED)

Author: TofMassilia13320

api/stse_hash.c

@@ -117,10 +117,10 @@ stse_ReturnCode_t stse_compute_hash(
 		return( STSE_API_INVALID_PARAMETER );
 	}
 
-	PLAT_UI16 maximum_chunck_size = stsafea_maximum_command_length[pSTSE->device_type];
+	PLAT_UI16 maximum_chunk_size = stsafea_maximum_command_length[pSTSE->device_type] - STSE_FRAME_CRC_SIZE - STSAFEA_CMD_EXTENSION_SIZE;
 
-	message_size = ((remaining_length + STSAFEA_HASH_ALGO_ID_SIZE) > maximum_chunck_size) ?
-					maximum_chunck_size - STSAFEA_HASH_ALGO_ID_SIZE:
+	message_size = ((remaining_length + STSAFEA_HASH_ALGO_ID_SIZE) > maximum_chunk_size) ?
+					maximum_chunk_size - STSAFEA_HASH_ALGO_ID_SIZE:
 					remaining_length;
 	ret = stsafea_start_hash(pSTSE, sha_algorithm, pMessage, message_size);
 	if(ret != STSE_OK)
@@ -132,8 +132,8 @@ stse_ReturnCode_t stse_compute_hash(
 
 	while(remaining_length > 0)
 	{
-		message_size = (remaining_length > maximum_chunck_size) ?
-						maximum_chunck_size :
+		message_size = (remaining_length > maximum_chunk_size) ?
+						maximum_chunk_size :
 						remaining_length;
 		ret = stsafea_process_hash(pSTSE, pMessage, message_size);
 		if(ret != STSE_OK)

services/stsafea/stsafea_commands.h

@@ -43,6 +43,7 @@
 
 #define STSAFEA_EXT_HEADER_SIZE 			2U
 #define STSAFEA_HEADER_SIZE 				1U
+#define STSAFEA_CMD_EXTENSION_SIZE 			1U
 #define STSAFEA_CMD_RSP_LEN_SIZE 			2U
 #define STSAFEA_SLOT_NUMBER_ID_SIZE			1U
 #define STSAFEA_AES_KEY_SIZE 				16U