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/* ykparse.c --- Example command line interface for authentication token.
*
* Written by Simon Josefsson <simon@josefsson.org>.
* Copyright (c) 2006-2012 Yubico AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* 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
* OWNER 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.
*
*/
#include "yubikey.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
int
main (int argc, char *argv[])
{
uint8_t buf[128];
uint8_t key[YUBIKEY_KEY_SIZE];
char *aeskey, *token;
yubikey_token_st tok;
/* Parse command line parameters. */
if (argc < 2)
{
printf ("Usage: %s <aeskey> <token>\n", argv[0]);
printf (" AESKEY:\tHex encoded AES-key.\n");
printf (" TOKEN:\t\tModHex encoded token.\n");
return EXIT_FAILURE;
}
aeskey = argv[1];
token = argv[2];
if (strlen (aeskey) != 32)
{
printf ("error: Hex encoded AES-key must be 32 characters.\n");
return EXIT_FAILURE;
}
if (strlen (token) > 32)
{
printf ("warning: overlong token, ignoring prefix: %.*s\n",
(int) strlen (token) - 32, token);
token = token + (strlen (token) - 32);
}
if (strlen (token) != 32)
{
printf ("error: ModHex encoded token must be 32 characters.\n");
return EXIT_FAILURE;
}
/* Debug. */
printf ("Input:\n");
printf (" token: %s\n", token);
yubikey_modhex_decode ((char *) key, token, YUBIKEY_KEY_SIZE);
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_KEY_SIZE; i++)
printf ("%02x ", key[i] & 0xFF);
printf ("\n");
}
printf (" aeskey: %s\n", aeskey);
yubikey_hex_decode ((char *) key, aeskey, YUBIKEY_KEY_SIZE);
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_KEY_SIZE; i++)
printf ("%02x ", key[i] & 0xFF);
printf ("\n");
}
/* Pack up dynamic password, decrypt it and verify checksum */
yubikey_parse ((uint8_t *) token, key, &tok);
printf ("Output:\n");
{
size_t i;
printf (" ");
for (i = 0; i < YUBIKEY_BLOCK_SIZE; i++)
printf ("%02x ", ((uint8_t *) & tok)[i] & 0xFF);
printf ("\n");
}
printf ("\nStruct:\n");
/* Debug */
{
size_t i;
printf (" uid: ");
for (i = 0; i < YUBIKEY_UID_SIZE; i++)
printf ("%02x ", tok.uid[i] & 0xFF);
printf ("\n");
}
printf (" counter: %d (0x%04x)\n", tok.ctr, tok.ctr);
printf (" timestamp (low): %d (0x%04x)\n", tok.tstpl, tok.tstpl);
printf (" timestamp (high): %d (0x%02x)\n", tok.tstph, tok.tstph);
printf (" session use: %d (0x%02x)\n", tok.use, tok.use);
printf (" random: %d (0x%02x)\n", tok.rnd, tok.rnd);
printf (" crc: %d (0x%04x)\n", tok.crc, tok.crc);
printf ("\nDerived:\n");
printf (" cleaned counter: %d (0x%04x)\n",
yubikey_counter (tok.ctr), yubikey_counter (tok.ctr));
yubikey_modhex_encode ((char *) buf, (char *) tok.uid, YUBIKEY_UID_SIZE);
printf (" modhex uid: %s\n", buf);
printf (" triggered by caps lock: %s\n",
yubikey_capslock (tok.ctr) ? "yes" : "no");
printf (" crc: %04X\n", yubikey_crc16 ((void *) &tok, YUBIKEY_KEY_SIZE));
printf (" crc check: ");
if (yubikey_crc_ok_p ((uint8_t *) & tok))
{
printf ("ok\n");
return EXIT_SUCCESS;
}
printf ("fail\n");
return EXIT_FAILURE;
}
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