95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* $NetBSD: util.c,v 1.3 2021/10/12 15:25:39 nia Exp $ */
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/*
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* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Niels Provos.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if !defined(lint)
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__RCSID("$NetBSD: util.c,v 1.3 2021/10/12 15:25:39 nia Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include "crypt.h"
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/* traditional unix "B64" encoding */
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static const unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
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"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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/* standard base64 encoding, used by Argon2 */
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static const unsigned char itoabase64[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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crypt_private int
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getnum(const char *str, size_t *num)
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{
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char *ep;
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unsigned long rv;
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if (str == NULL) {
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*num = 0;
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return 0;
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}
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rv = strtoul(str, &ep, 0);
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if (str == ep || *ep) {
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errno = EINVAL;
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return -1;
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}
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if (errno == ERANGE && rv == ULONG_MAX)
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return -1;
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*num = (size_t)rv;
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return 0;
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}
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crypt_private void
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__crypt_to64(char *s, uint32_t v, int n)
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{
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while (--n >= 0) {
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*s++ = itoa64[v & 0x3f];
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v >>= 6;
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}
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}
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crypt_private void
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__crypt_tobase64(char *s, uint32_t v, int n)
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{
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while (--n >= 0) {
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*s++ = itoabase64[v & 0x3f];
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v >>= 6;
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}
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}
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