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/*
* Demo on how to use /dev/crypto device for HMAC.
*
* Placed under public domain.
*
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "../ncr.h"
#include <stdlib.h>
#define DATA_SIZE 4096
static void randomize_data(uint8_t * data, size_t data_size)
{
int i;
srand(time(0)*getpid());
for (i=0;i<data_size;i++) {
data[i] = rand() & 0xff;
}
}
static int
test_ncr_data(int cfd)
{
struct ncr_data_init_st init;
struct ncr_data_st kdata;
uint8_t data[DATA_SIZE];
uint8_t data_bak[DATA_SIZE];
int i;
randomize_data(data, sizeof(data));
memcpy(data_bak, data, sizeof(data));
init.max_object_size = DATA_SIZE;
init.flags = NCR_DATA_FLAG_EXPORTABLE;
init.initial_data = data;
init.initial_data_size = sizeof(data);
if (ioctl(cfd, NCRIO_DATA_INIT, &init)) {
perror("ioctl(NCRIO_DATA_INIT)");
return 1;
}
fprintf(stderr, "Imported data\n");
memset(data, 0, sizeof(data));
kdata.desc = init.desc;
kdata.data = data;
kdata.data_size = sizeof(data);
kdata.append_flag = 0;
if (ioctl(cfd, NCRIO_DATA_GET, &kdata)) {
perror("ioctl(NCRIO_DATA_GET)");
return 1;
}
if (memcmp(data, data_bak, sizeof(data))!=0) {
fprintf(stderr, "data returned but differ!\n");
return 1;
}
fprintf(stderr, "Verified imported data integrity\n");
/* test set */
memset(data, 0xf1, sizeof(data));
kdata.desc = init.desc;
kdata.data = data;
kdata.data_size = sizeof(data);
kdata.append_flag = 0;
if (ioctl(cfd, NCRIO_DATA_SET, &kdata)) {
perror("ioctl(NCRIO_DATA_SET)");
return 1;
}
fprintf(stderr, "Imported new data\n");
/* test get after set */
memset(data, 0, sizeof(data));
kdata.desc = init.desc;
kdata.data = data;
kdata.data_size = sizeof(data);
kdata.append_flag = 0;
if (ioctl(cfd, NCRIO_DATA_GET, &kdata)) {
perror("ioctl(NCRIO_DATA_GET)");
return 1;
}
for(i=0;i<kdata.data_size;i++) {
if (((uint8_t*)kdata.data)[i] != 0xf1) {
fprintf(stderr, "data returned but differ!\n");
return 1;
}
}
fprintf(stderr, "Verified new data\n");
if (ioctl(cfd, NCRIO_DATA_DEINIT, &kdata.desc)) {
perror("ioctl(NCRIO_DATA_DEINIT)");
return 1;
}
fprintf(stderr, "Initializing unexportable data\n");
randomize_data(data, sizeof(data));
init.max_object_size = DATA_SIZE;
init.flags = 0;
init.initial_data = data;
init.initial_data_size = sizeof(data);
if (ioctl(cfd, NCRIO_DATA_INIT, &init)) {
perror("ioctl(NCRIO_DATA_INIT)");
return 1;
}
kdata.desc = init.desc;
kdata.data = data;
kdata.data_size = sizeof(data);
kdata.append_flag = 0;
if (ioctl(cfd, NCRIO_DATA_GET, &kdata)) {
perror("ioctl");
fprintf(stderr, "Verified that unexportable data cannot be exported\n");
} else {
fprintf(stderr, "Unexportable data were exported!?\n");
return 1; /* ok */
}
for (i=0;i<512;i++ ) {
init.max_object_size = DATA_SIZE;
init.flags = 0;
init.initial_data = data;
init.initial_data_size = sizeof(data);
if (ioctl(cfd, NCRIO_DATA_INIT, &init)) {
perror("ioctl(NCRIO_DATA_INIT)");
fprintf(stderr, "Reached maximum limit at: %d data\n", i);
}
}
return 0;
}
int
main()
{
int fd = -1;
/* Open the crypto device */
fd = open("/dev/crypto", O_RDWR, 0);
if (fd < 0) {
perror("open(/dev/crypto)");
return 1;
}
/* Run the test itself */
if (test_ncr_data(fd))
return 1;
/* Close the original descriptor */
if (close(fd)) {
perror("close(fd)");
return 1;
}
return 0;
}
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