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