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/*
* Copyright © 2020, Andreas Jellinghaus <andreas@ionisiert.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* libp11 example code: getrandom.c
*
* This examply simply connects to your smart card and
* asks for a few random bytes.
*/
#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: */
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