77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/* $OpenBSD: yubikey.h,v 1.3 2013/06/04 18:49:12 mcbride Exp $ */
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/*
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* Written by Simon Josefsson <simon@josefsson.org>.
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* Copyright (c) 2006, 2007, 2008, 2009, 2010 Yubico AB
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* Copyright (c) 2010 Daniel Hartmeier <daniel@benzedrine.cx>
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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 are
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* met:
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*
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* * 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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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef __YUBIKEY_H__
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#define __YUBIKEY_H__
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#include <stdint.h>
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#include <string.h>
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#define YUBIKEY_BLOCK_SIZE 16
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#define YUBIKEY_KEY_SIZE 16
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#define YUBIKEY_TOKEN_SIZE 32
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#define YUBIKEY_UID_SIZE 6
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#define YUBIKEY_CRC_OK_RESIDUE 0xf0b8
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#define yubikey_counter(ctr) ((ctr) & 0x7FFF)
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#define yubikey_capslock(ctr) ((ctr) & 0x8000)
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#define yubikey_crc_ok_p(tok) \
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(yubikey_crc16 ((tok), YUBIKEY_BLOCK_SIZE) == YUBIKEY_CRC_OK_RESIDUE)
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typedef struct {
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uint8_t uid[YUBIKEY_UID_SIZE];
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uint16_t ctr;
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uint16_t tstpl;
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uint8_t tstph;
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uint8_t use;
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uint16_t rnd;
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uint16_t crc;
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} yubikey_token_st;
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typedef yubikey_token_st *yubikey_token_t;
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extern int yubikey_parse(const uint8_t token[YUBIKEY_BLOCK_SIZE],
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const uint8_t key[YUBIKEY_KEY_SIZE], yubikey_token_t out, int index);
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extern void yubikey_modhex_decode(char *dst, const char *src, size_t dstsize);
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extern void yubikey_hex_encode(char *dst, const char *src, size_t srcsize);
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extern void yubikey_hex_decode(char *dst, const char *src, size_t dstsize);
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extern uint16_t yubikey_crc16(const uint8_t *buf, size_t buf_size);
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extern void yubikey_aes_decrypt(uint8_t *state, const uint8_t *key);
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#endif
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