260ba0bff1
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 1999 Mark Murray
|
|
* Copyright (c) 2014 Dag-Erling Smørgrav
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``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 MARK MURRAY OR CONTRIBUTORS 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <libutil.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "crypt.h"
|
|
|
|
/*
|
|
* List of supported crypt(3) formats.
|
|
*
|
|
* The default algorithm is the last entry in the list (second-to-last
|
|
* array element since the last is a sentinel). The reason for placing
|
|
* the default last rather than first is that DES needs to be at the
|
|
* bottom for the algorithm guessing logic in crypt(3) to work correctly,
|
|
* and it needs to be the default for backward compatibility.
|
|
*/
|
|
static const struct crypt_format {
|
|
const char *name;
|
|
int (*func)(const char *, const char *, char *);
|
|
const char *magic;
|
|
} crypt_formats[] = {
|
|
{ "md5", crypt_md5, "$1$" },
|
|
#ifdef HAS_BLOWFISH
|
|
{ "blf", crypt_blowfish, "$2" },
|
|
#endif
|
|
{ "nth", crypt_nthash, "$3$" },
|
|
{ "sha256", crypt_sha256, "$5$" },
|
|
{ "sha512", crypt_sha512, "$6$" },
|
|
#ifdef HAS_DES
|
|
{ "des", crypt_des, "_" },
|
|
#endif
|
|
|
|
/* sentinel */
|
|
{ NULL, NULL, NULL }
|
|
};
|
|
|
|
static const struct crypt_format *crypt_format =
|
|
&crypt_formats[(sizeof crypt_formats / sizeof *crypt_formats) - 2];
|
|
|
|
#define DES_SALT_ALPHABET \
|
|
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
|
|
/*
|
|
* Returns the name of the currently selected format.
|
|
*/
|
|
const char *
|
|
crypt_get_format(void)
|
|
{
|
|
|
|
return (crypt_format->name);
|
|
}
|
|
|
|
/*
|
|
* Selects the format to use for subsequent crypt(3) invocations.
|
|
*/
|
|
int
|
|
crypt_set_format(const char *format)
|
|
{
|
|
const struct crypt_format *cf;
|
|
|
|
for (cf = crypt_formats; cf->name != NULL; ++cf) {
|
|
if (strcasecmp(cf->name, format) == 0) {
|
|
crypt_format = cf;
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Hash the given password with the given salt. If the salt begins with a
|
|
* magic string (e.g. "$6$" for sha512), the corresponding format is used;
|
|
* otherwise, the currently selected format is used.
|
|
*/
|
|
char *
|
|
crypt_r(const char *passwd, const char *salt, struct crypt_data *data)
|
|
{
|
|
const struct crypt_format *cf;
|
|
int (*func)(const char *, const char *, char *);
|
|
#ifdef HAS_DES
|
|
int len;
|
|
#endif
|
|
|
|
for (cf = crypt_formats; cf->name != NULL; ++cf)
|
|
if (cf->magic != NULL && strstr(salt, cf->magic) == salt) {
|
|
func = cf->func;
|
|
goto match;
|
|
}
|
|
#ifdef HAS_DES
|
|
len = strlen(salt);
|
|
if ((len == 13 || len == 2) && strspn(salt, DES_SALT_ALPHABET) == len) {
|
|
func = crypt_des;
|
|
goto match;
|
|
}
|
|
#endif
|
|
func = crypt_format->func;
|
|
match:
|
|
if (func(passwd, salt, data->__buf) != 0)
|
|
return (NULL);
|
|
return (data->__buf);
|
|
}
|
|
|
|
char *
|
|
crypt(const char *passwd, const char *salt)
|
|
{
|
|
static struct crypt_data data;
|
|
|
|
return (crypt_r(passwd, salt, &data));
|
|
}
|