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111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*-
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* Copyright (c) 2012-2013 The University of Oslo
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* Copyright (c) 2018 Dag-Erling Smørgrav
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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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* 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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* 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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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#ifndef OATH_CONSTANTS_H_INCLUDED
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#define OATH_CONSTANTS_H_INCLUDED
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#ifndef CRYB_TO
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#include <cryb/to.h>
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#endif
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CRYB_BEGIN
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#define oath_mode cryb_oath_mode
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#define oath_hash cryb_oath_hash
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/*
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* OATH modes
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*/
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typedef enum {
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om_undef, /* not set / default */
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om_hotp, /* RFC 4226 HOTP */
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om_totp, /* RFC 6238 TOTP */
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om_ocra, /* RFC 6287 OCRA */
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om_max
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} oath_mode;
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/*
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* Hash functions
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*/
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typedef enum {
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oh_undef, /* not set / default */
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oh_md5, /* RFC 1321 MD5 */
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oh_sha1, /* FIPS 180 SHA-1 */
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oh_sha256, /* FIPS 180 SHA-256 */
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oh_sha512, /* FIPS 180 SHA-512 */
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oh_max
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} oath_hash;
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/*
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* Minimum and default number of digits as per RFC 4226.
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*/
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#define OATH_MIN_DIGITS 6
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#define OATH_DEF_DIGITS 6
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#define OATH_MAX_DIGITS 9
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/*
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* Default time step for TOTP: 30 seconds.
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*/
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#define OATH_DEF_TIMESTEP 30
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/*
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* Maximum time step for TOTP: 10 minutes, which RFC 6238 cites as an
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* example of an unreasonably large time step.
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*/
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#define OATH_MAX_TIMESTEP 600
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/*
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* Minimum, default and maximum key lengths in bytes as per RFC 4226.
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* HMAC has a 64-byte block size; if the key K is longer than that, HMAC
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* derives a new key K' = H(K).
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*/
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#define OATH_MIN_KEYLEN 16
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#define OATH_DEF_KEYLEN 20
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#define OATH_MAX_KEYLEN 64
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/*
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* Maximum issuer length in characters, including terminating NUL.
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*/
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#define OATH_MAX_ISSUERLEN 64
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/*
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* Maximum label length in characters, including terminating NUL.
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*/
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#define OATH_MAX_LABELLEN 64
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/*
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* Issuer and label to use for dummy keys.
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*/
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#define OATH_DUMMY_ISSUER "cryb-oath"
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#define OATH_DUMMY_LABEL "dummy@cryb.to"
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CRYB_END
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#endif
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