topic Re: Error calling enclave function: 2 By passing typedef struct in Intel® Software Guard Extensions (Intel® SGX)

Error calling enclave function: 2 By passing typedef struct

jdafoe — Sat, 01 Apr 2023 01:51:01 GMT

Hi,

This is the trusted part of my Enclave.edl file:

enclave {

include "sharedTypes.h"
from "sgx_tstdc.edl" import *;
from "sgx_pthread.edl" import *;

trusted {

public void ecall_init();
public void ecall_file_init([in, string] const char *fileName,[out] Tag *tag,[out, size=10, count=numBlocks] uint8_t **sigma, int numBlocks);

And this is where the function ecall_file_init is called:

void app_file_init(sgx_enclave_id_t eid, const char *fileName, int numBlocks) {

// Initialize tag and sigma
Tag tag;

// First, allocate memory for the array of pointers
uint8_t **sigma = malloc(numBlocks * sizeof(uint8_t *));

// Then, allocate memory for each block of memory that each pointer points to
for (int i = 0; i < numBlocks; i++) {
sigma[i] = malloc((PRIME_LENGTH / * sizeof(uint8_t));

// Initialize each block of memory to 0
memset(sigma[i], 0, (PRIME_LENGTH / * sizeof(uint8_t));
}

sgx_status_t status;
// Call ecall_file_init to initialize tag and sigma
status = ecall_file_init(eid, fileName, &tag, sigma, numBlocks);
if (status != SGX_SUCCESS) {
printf("Error calling enclave function: %d\n", status);
return;
}

The Tag typedef struct:

typedef struct Tag {
int n;
uint8_t prfKey[KEY_SIZE];
uint8_t alpha[PAGE_PER_BLOCK][PRIME_LENGTH / 8];
uint8_t MAC[MAC_SIZE];
} Tag;

I am getting error #2 which indicates I am passing something into the ecall incorreclty. I suspect that it has something to do with tag. Any things I can try or solutions?

Re:Error calling enclave function: 2 By passing typedef struct

KFPW_Intel — Mon, 03 Apr 2023 01:15:13 GMT

Hi jdafoe,

Thank you for your interest in Intel® SGX.

As I am looking around for error #2, could you share the screenshot of this error?

May I know what is your use cases in this status? -> status = ecall_file_init(eid, fileName, &tag, sigma, numBlocks);

Looking forward to hearing from you.

Regards,

Ken

Re:Error calling enclave function: 2 By passing typedef struct

KFPW_Intel — Fri, 07 Apr 2023 03:23:38 GMT

Hi jdafoe,

I would like to follow up with you if you can share the screenshot of error #2 to assist your issue further.

Looking forward to hearing from you.

Thank you.

Regards,

Ken

Re: Error calling enclave function: 2 By passing typedef struct

jdafoe — Fri, 07 Apr 2023 15:37:23 GMT

Hello,

I have since figured out the issue. It turned out to be unrelated to the typedef struct.

Thanks.

Re:Error calling enclave function: 2 By passing typedef struct

KFPW_Intel — Mon, 10 Apr 2023 00:35:22 GMT

Hi jdafoe,

I am glad to see that the issues that you faced have been solved.

This thread has been marked as solved and Intel will no longer monitor this thread. If you want a response from Intel in a follow-up question, please open a new thread.

Regards,

Ken