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 43 extern const char *const std_dict[]; 44 45 unsigned 46 otp_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 60 void 61 otp_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 76 void 77 otp_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 85 void 86 otp_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 94 void 95 otp_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