/* libp11 example code: getrandom.c
*
* This examply simply connects to your smart card and
* asks for a few random bytes.
*
* Feel free to copy all of the code as needed.
*
*/
#include <stdio.h>
#include <libp11.h>
int main(int argc, char *argv[])
{
PKCS11_CTX *ctx;
PKCS11_SLOT *slots, *slot;
unsigned char random[10];
int rc = 0, i, len;
unsigned int nslots;
if (argc != 2) {
fprintf(stderr, "usage: getrandom /usr/lib/opensc-pkcs11.so\n");
return 1;
}
/* new context */
ctx = PKCS11_CTX_new();
/* load pkcs #11 module */
rc = PKCS11_CTX_load(ctx, argv[1]);
if (rc) {
fprintf(stderr, "loading pkcs11 engine failed: %s\n",
ERR_reason_error_string(ERR_get_error()));
rc = 1;
goto nolib;
}
/* get information on all slots */
rc = PKCS11_enumerate_slots(ctx, &slots, &nslots);
if (rc < 0) {
fprintf(stderr, "no slots available\n");
rc = 2;
goto noslots;
}
printf("%d slots available\n", nslots);
/* get first slot with a token */
slot = PKCS11_find_token(ctx, slots, nslots);
if (slot == NULL || slot->token == NULL) {
fprintf(stderr, "no token available\n");
rc = 3;
goto notoken;
}
printf("Slot manufacturer......: %s\n", slot->manufacturer);
printf("Slot description.......: %s\n", slot->description);
printf("Slot token label.......: %s\n", slot->token->label);
printf("Slot token manufacturer: %s\n", slot->token->manufacturer);
printf("Slot token model.......: %s\n", slot->token->model);
printf("Slot token serialnr....: %s\n", slot->token->serialnr);
/* get 10 random bytes */
len = sizeof(random);
rc = PKCS11_generate_random(slot, random, len);
if (rc < 0) {
fprintf(stderr, "generate_random failed: %s\n",
ERR_reason_error_string(ERR_get_error()));
rc = 4;
goto norandom;
}
printf("\nRandom numbers generated by the token: ");
for (i = 0; i < len; i++)
printf("%02X ", random[i]);
printf("\n");
rc = 0;
norandom:
notoken:
PKCS11_release_all_slots(ctx, slots, nslots);
noslots:
PKCS11_CTX_unload(ctx);
nolib:
PKCS11_CTX_free(ctx);
return rc;
}
/* vim: set noexpandtab: */