3ca5f8150f
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7463 ec53bebd-3082-4978-b11e-865c3cabbd6b
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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RCSID("$Id$");
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#endif
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#include "otp_locl.h"
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extern const char *const std_dict[];
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unsigned
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otp_checksum (OtpKey key)
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{
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int i;
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unsigned sum = 0;
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for (i = 0; i < OTPKEYSIZE; ++i)
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sum += ((key[i] >> 0) & 0x03)
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+ ((key[i] >> 2) & 0x03)
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+ ((key[i] >> 4) & 0x03)
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+ ((key[i] >> 6) & 0x03);
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sum &= 0x03;
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return sum;
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}
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void
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otp_print_stddict (OtpKey key, char *str, size_t sz)
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{
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unsigned sum;
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sum = otp_checksum (key);
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snprintf (str, sz,
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"%s %s %s %s %s %s",
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std_dict[(key[0] << 3) | (key[1] >> 5)],
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std_dict[((key[1] & 0x1F) << 6) | (key[2] >> 2)],
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std_dict[((key[2] & 0x03) << 9) | (key[3] << 1) | (key[4] >> 7)],
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std_dict[((key[4] & 0x7F) << 4) | (key[5] >> 4)],
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std_dict[((key[5] & 0x0F) << 7) | (key[6] >> 1)],
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std_dict[((key[6] & 0x01) << 10) | (key[7] << 2) | sum]);
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}
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void
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otp_print_hex (OtpKey key, char *str, size_t sz)
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{
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snprintf (str, sz,
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"%02x%02x%02x%02x%02x%02x%02x%02x",
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key[0], key[1], key[2], key[3],
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key[4], key[5], key[6], key[7]);
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}
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void
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otp_print_hex_extended (OtpKey key, char *str, size_t sz)
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{
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strlcpy (str, OTP_HEXPREFIX, sz);
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otp_print_hex (key,
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str + strlen(OTP_HEXPREFIX),
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sz - strlen(OTP_HEXPREFIX));
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}
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void
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otp_print_stddict_extended (OtpKey key, char *str, size_t sz)
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{
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strlcpy (str, OTP_WORDPREFIX, sz);
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otp_print_stddict (key,
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str + strlen(OTP_WORDPREFIX),
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sz - strlen(OTP_WORDPREFIX));
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}
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