serverCalculateByFile

The server receives the query data from the client and returns the corresponding value to the client.

int calculateByFile ( 
    DG_TeeCtx *dgTeeCtx, 
    DG_AlgorithmsType type,
    DG_MpcFileInput *input,
    DG_MpcFileOutput *output
)

Parameters

Parameter	Description	Value Range	Input/Output
dgTeeCtx	KCAL context	Context initialized in section initTeeCtx.	Input
dataPath	DG_MpcFileInput	The value is not null.	Input
isDeleteCache	int	isDeleteCache (whether to delete the cache. 0: false; 1: true)	Output

**Table 1** DG_MpcFileInput structure
Name	Type	Description
filePath	char*	File path
pathLen	uint32_t	Path length
dataSize	uint64_t	Data size

Return Values

Success: 0 is returned.
Failure: The error code is returned.

Error Codes

Error Code	Value	Description	Remarks
DG_ERR_MPC_TEE_INVALID_PARAM	4501	Invalid parameter	-
DG_ERR_MPC_TEE_INVALID_ALGORITHM_TYPE	4502	Invalid algorithm type	-
DG_ERR_MALLOC_FAIL	51	Memory allocation failure	-
DG_ERR_MPC_TEE_DIV_IS_ZERO	4512	Division-by-zero error	-
DG_FAILURE	1	Operator execution failure	-

Dependency

dgTeeCtx depends on the successful initialization of initTeeCtx.
The dependent header file is data_guard_mpc.h.

Example

Call the serverCalculateByFile API using the teeOpts output of the successful DG_InitPsiOpts call.

#include  "data_guard_mpc.h" 
DG_MpcFileInput teeFileInput;
teeFileInput.filePath = const_cast<char *>(cacheFilePath.c_str());
teeFileInput.pathLen = static_cast<uint32_t>(cacheFilePath.length());return pirOpts->serverCalculateByFile(dgTeeCtx_, &teeFileInput, isDeleteCache);

Running result: res is 0 and output is not null.

Parent topic: PIR Operator