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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 16
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 dinit;
struct ncr_key_generate_st kgen;
ncr_key_t key;
struct ncr_key_data_st keydata;
struct ncr_data_st kdata;
uint8_t data[DATA_SIZE];
uint8_t data_bak[DATA_SIZE];
int i;
/* test 1: generate a key in userspace import it
* to kernel via data and export it.
*/
randomize_data(data, sizeof(data));
memcpy(data_bak, data, sizeof(data));
dinit.max_object_size = DATA_SIZE;
dinit.flags = NCR_DATA_FLAG_EXPORTABLE;
dinit.initial_data = data;
dinit.initial_data_size = sizeof(data);
if (ioctl(cfd, NCRIO_DATA_INIT, &dinit)) {
perror("ioctl(NCRIO_DATA_INIT)");
return 1;
}
/* convert it to key */
if (ioctl(cfd, NCRIO_KEY_INIT, &key)) {
perror("ioctl(NCRIO_KEY_INIT)");
return 1;
}
keydata.key_id[0] = 'a';
keydata.key_id[2] = 'b';
keydata.key_id_size = 2;
keydata.key = key;
keydata.data = dinit.desc;
if (ioctl(cfd, NCRIO_KEY_IMPORT, &keydata)) {
perror("ioctl(NCRIO_KEY_IMPORT)");
return 1;
}
/* now try to read it */
if (ioctl(cfd, NCRIO_DATA_DEINIT, &dinit.desc)) {
perror("ioctl(NCRIO_DATA_DEINIT)");
return 1;
}
dinit.max_object_size = DATA_SIZE;
dinit.flags = NCR_DATA_FLAG_EXPORTABLE;
dinit.initial_data = NULL;
dinit.initial_data_size = 0;
if (ioctl(cfd, NCRIO_DATA_INIT, &dinit)) {
perror("ioctl(NCRIO_DATA_INIT)");
return 1;
}
memset(&keydata, 0, sizeof(keydata));
keydata.key = key;
keydata.data = dinit.desc;
if (ioctl(cfd, NCRIO_KEY_EXPORT, &keydata)) {
perror("ioctl(NCRIO_KEY_IMPORT)");
return 1;
}
/* now read data */
memset(data, 0, sizeof(data));
kdata.desc = dinit.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;
}
if (ioctl(cfd, NCRIO_KEY_DEINIT, &key)) {
perror("ioctl(NCRIO_KEY_DEINIT)");
return 1;
}
/* finished, we keep data for next test */
/* test 2: generate a key in kernel space and
* export it.
*/
/* convert it to key */
if (ioctl(cfd, NCRIO_KEY_INIT, &key)) {
perror("ioctl(NCRIO_KEY_INIT)");
return 1;
}
kgen.desc = key;
kgen.params.algorithm = NCR_ALG_AES_CBC;
kgen.params.keyflags = NCR_KEY_FLAG_EXPORTABLE;
kgen.params.params.secret.bits = 128; /* 16 bytes */
if (ioctl(cfd, NCRIO_KEY_GENERATE, &kgen)) {
perror("ioctl(NCRIO_KEY_IMPORT)");
return 1;
}
memset(&keydata, 0, sizeof(keydata));
keydata.key = key;
keydata.data = dinit.desc;
if (ioctl(cfd, NCRIO_KEY_EXPORT, &keydata)) {
perror("ioctl(NCRIO_KEY_IMPORT)");
return 1;
}
/* now read data */
memset(data, 0, sizeof(data));
kdata.desc = dinit.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;
}
fprintf(stderr, "Generated key: %.2x.%.2x.%.2x.%.2x.%.2x.%.2x.%.2x.%.2x."
"%.2x.%.2x.%.2x.%.2x.%.2x.%.2x.%.2x.%.2x\n", data[0], data[1],
data[2], data[3], data[4], data[5], data[6], data[7], data[8],
data[9], data[10], data[11], data[12], data[13], data[14],
data[15]);
if (ioctl(cfd, NCRIO_KEY_DEINIT, &key)) {
perror("ioctl(NCRIO_KEY_DEINIT)");
return 1;
}
/* test 3: generate an unexportable key in kernel space and
* try to export it.
*/
if (ioctl(cfd, NCRIO_KEY_INIT, &key)) {
perror("ioctl(NCRIO_KEY_INIT)");
return 1;
}
kgen.desc = key;
kgen.params.algorithm = NCR_ALG_AES_CBC;
kgen.params.keyflags = 0;
kgen.params.params.secret.bits = 128; /* 16 bytes */
if (ioctl(cfd, NCRIO_KEY_GENERATE, &kgen)) {
perror("ioctl(NCRIO_KEY_IMPORT)");
return 1;
}
memset(&keydata, 0, sizeof(keydata));
keydata.key = key;
keydata.data = dinit.desc;
if (ioctl(cfd, NCRIO_KEY_EXPORT, &keydata)==0) {
fprintf(stderr, "Error: Allowed key exporting!\n");
return 1;
}
if (ioctl(cfd, NCRIO_KEY_DEINIT, &key)) {
perror("ioctl(NCRIO_KEY_DEINIT)");
return 1;
}
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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