NetBSD/lib/libcrypt/util.c

95 lines
2.8 KiB
C

/* $NetBSD: util.c,v 1.3 2021/10/12 15:25:39 nia Exp $ */
/*
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if !defined(lint)
__RCSID("$NetBSD: util.c,v 1.3 2021/10/12 15:25:39 nia Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
#include "crypt.h"
/* traditional unix "B64" encoding */
static const unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
/* standard base64 encoding, used by Argon2 */
static const unsigned char itoabase64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
crypt_private int
getnum(const char *str, size_t *num)
{
char *ep;
unsigned long rv;
if (str == NULL) {
*num = 0;
return 0;
}
rv = strtoul(str, &ep, 0);
if (str == ep || *ep) {
errno = EINVAL;
return -1;
}
if (errno == ERANGE && rv == ULONG_MAX)
return -1;
*num = (size_t)rv;
return 0;
}
crypt_private void
__crypt_to64(char *s, uint32_t v, int n)
{
while (--n >= 0) {
*s++ = itoa64[v & 0x3f];
v >>= 6;
}
}
crypt_private void
__crypt_tobase64(char *s, uint32_t v, int n)
{
while (--n >= 0) {
*s++ = itoabase64[v & 0x3f];
v >>= 6;
}
}