1/*	$NetBSD: otp_print.c,v 1.1.1.1 2011/04/13 18:15:40 elric Exp $	*/
2
3/*
4 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifdef HAVE_CONFIG_H
37#include "config.h"
38__RCSID("$NetBSD: otp_print.c,v 1.1.1.1 2011/04/13 18:15:40 elric Exp $");
39#endif
40
41#include "otp_locl.h"
42
43extern const char *const std_dict[];
44
45unsigned
46otp_checksum (OtpKey key)
47{
48  int i;
49  unsigned sum = 0;
50
51  for (i = 0; i < OTPKEYSIZE; ++i)
52    sum += ((key[i] >> 0) & 0x03)
53      + ((key[i] >> 2) & 0x03)
54      + ((key[i] >> 4) & 0x03)
55      + ((key[i] >> 6) & 0x03);
56  sum &= 0x03;
57  return sum;
58}
59
60void
61otp_print_stddict (OtpKey key, char *str, size_t sz)
62{
63  unsigned sum;
64
65  sum = otp_checksum (key);
66  snprintf (str, sz,
67	    "%s %s %s %s %s %s",
68	    std_dict[(key[0] << 3) | (key[1] >> 5)],
69	    std_dict[((key[1] & 0x1F) << 6) | (key[2] >> 2)],
70	    std_dict[((key[2] & 0x03) << 9) | (key[3] << 1) | (key[4] >> 7)],
71	    std_dict[((key[4] & 0x7F) << 4) | (key[5] >> 4)],
72	    std_dict[((key[5] & 0x0F) << 7) | (key[6] >> 1)],
73	    std_dict[((key[6] & 0x01) << 10) | (key[7] << 2) | sum]);
74}
75
76void
77otp_print_hex (OtpKey key, char *str, size_t sz)
78{
79  snprintf (str, sz,
80	    "%02x%02x%02x%02x%02x%02x%02x%02x",
81	    key[0], key[1], key[2], key[3],
82	    key[4], key[5], key[6], key[7]);
83}
84
85void
86otp_print_hex_extended (OtpKey key, char *str, size_t sz)
87{
88  strlcpy (str, OTP_HEXPREFIX, sz);
89  otp_print_hex (key,
90		 str + strlen(OTP_HEXPREFIX),
91		 sz - strlen(OTP_HEXPREFIX));
92}
93
94void
95otp_print_stddict_extended (OtpKey key, char *str, size_t sz)
96{
97  strlcpy (str, OTP_WORDPREFIX, sz);
98  otp_print_stddict (key,
99		     str + strlen(OTP_WORDPREFIX),
100		     sz - strlen(OTP_WORDPREFIX));
101}
102