286 lines
6.6 KiB
C
286 lines
6.6 KiB
C
/* $NetBSD: pwhash.c,v 1.16 2019/10/21 02:36:48 jhigh Exp $ */
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/* $OpenBSD: encrypt.c,v 1.16 2002/02/16 21:27:45 millert Exp $ */
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/*
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* Copyright (c) 1996, Jason Downs. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: pwhash.c,v 1.16 2019/10/21 02:36:48 jhigh Exp $");
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#endif
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include <login_cap.h>
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#include <util.h>
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/*
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* Very simple little program, for encrypting passwords from the command
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* line. Useful for scripts and such.
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*/
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#define DO_MAKEKEY 0
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#define DO_DES 1
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#define DO_MD5 2
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#define DO_BLF 3
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#define DO_SHA1 4
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#ifdef HAVE_ARGON2
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#define DO_ARGON2 5
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/*
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* Argon2 variant may be specified in /etc/passwd.conf
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* If not found, default to ARGON2_DEFAULT_VARIANT_STR
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* acceptable values are: argon2i, argon2d, argon2id
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*/
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#define ARGON2_DEFAULT_VARIANT_STR "argon2id"
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#endif /* HAVE_ARGON2 */
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__dead static void
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usage(void)
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{
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(void)fprintf(stderr,
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#ifdef HAVE_ARGON2
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"Usage: %s [-km] [-A variant[,params]] [-b rounds] [-S rounds] [-s salt] [-p | string]\n",
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#else
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"Usage: %s [-km] [-b rounds] [-S rounds] [-s salt] [-p | string]\n",
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#endif /* HAVE_ARGON2 */
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getprogname());
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exit(1);
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}
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static char *
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trim(char *line)
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{
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char *ptr;
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for (ptr = &line[strlen(line) - 1]; ptr > line; ptr--) {
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if (!isspace((unsigned char)*ptr))
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break;
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}
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ptr[1] = '\0';
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for (ptr = line; *ptr && isspace((unsigned char)*ptr); ptr++)
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continue;
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return ptr;
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}
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static void
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print_passwd(char *string, int operation, const char *extra)
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{
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char buf[_PASSWORD_LEN];
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char option[LINE_MAX], *key, *opt;
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int error = 0;
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const char *salt = buf;
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switch(operation) {
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case DO_MAKEKEY:
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/*
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* makekey mode: parse string into separate DES key and salt.
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*/
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if (strlen(string) != 10) {
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/* To be compatible... */
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error = EFTYPE;
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break;
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}
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salt = &string[8];
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break;
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case DO_MD5:
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error = pw_gensalt(buf, _PASSWORD_LEN, "md5", extra);
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break;
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case DO_SHA1:
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error = pw_gensalt(buf, _PASSWORD_LEN, "sha1", extra);
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break;
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case DO_BLF:
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error = pw_gensalt(buf, _PASSWORD_LEN, "blowfish", extra);
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break;
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case DO_DES:
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salt = extra;
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break;
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#ifdef HAVE_ARGON2
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case DO_ARGON2:
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/* pwhash -A <variant>[,param]* */
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/* param
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* m=<m_cost>
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* t=<t_cost>
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* p=<threads>
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*/
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snprintf(option, sizeof(option), "%s", extra);
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opt = option;
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key = strsep(&opt, ",");
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error = pw_gensalt(buf, _PASSWORD_LEN, key, opt);
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break;
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#endif /* HAVE_ARGON2 */
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default:
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pw_getconf(option, sizeof(option), "default", "localcipher");
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opt = option;
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key = strsep(&opt, ",");
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error = pw_gensalt(buf, _PASSWORD_LEN, key, opt);
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break;
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}
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if (error)
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err(1, "Cannot generate salt");
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(void)fputs(crypt(string, salt), stdout);
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}
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int
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main(int argc, char **argv)
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{
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int opt;
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int operation = -1;
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int prompt = 0;
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const char *extra = NULL; /* Store salt or number of rounds */
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setprogname(argv[0]);
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if (strcmp(getprogname(), "makekey") == 0)
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operation = DO_MAKEKEY;
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#ifdef HAVE_ARGON2
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while ((opt = getopt(argc, argv, "kmpS:s:b:A:")) != -1) {
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#else
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while ((opt = getopt(argc, argv, "kmpS:s:b:")) != -1) {
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#endif /* HAVE_ARGON2 */
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switch (opt) {
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case 'k': /* Stdin/Stdout Unix crypt */
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if (operation != -1 || prompt)
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usage();
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operation = DO_MAKEKEY;
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break;
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case 'm': /* MD5 password hash */
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if (operation != -1)
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usage();
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operation = DO_MD5;
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extra = NULL;
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break;
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case 'p':
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if (operation == DO_MAKEKEY)
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usage();
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prompt = 1;
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break;
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case 'S': /* SHA1 password hash */
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if (operation != -1)
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usage();
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operation = DO_SHA1;
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extra = optarg;
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break;
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case 's': /* Unix crypt (DES) */
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if (operation != -1 || optarg[0] == '$')
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usage();
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operation = DO_DES;
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extra = optarg;
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break;
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case 'b': /* Blowfish password hash */
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if (operation != -1)
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usage();
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operation = DO_BLF;
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extra = optarg;
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break;
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#ifdef HAVE_ARGON2
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case 'A': /* Argon2 password hash */
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if (operation != -1)
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usage();
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operation = DO_ARGON2;
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extra = optarg;
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break;
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#endif /* HAVE_ARGON2 */
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default:
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usage();
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}
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}
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if (((argc - optind) < 1) || operation == DO_MAKEKEY) {
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char line[LINE_MAX], *string;
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if (prompt) {
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string = getpass("Enter string: ");
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print_passwd(string, operation, extra);
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(void)fputc('\n', stdout);
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} else {
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/* Encrypt stdin to stdout. */
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while (!feof(stdin) &&
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(fgets(line, sizeof(line), stdin) != NULL)) {
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/* Kill the whitesapce. */
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string = trim(line);
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if (*string == '\0')
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continue;
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print_passwd(string, operation, extra);
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if (operation == DO_MAKEKEY) {
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(void)fflush(stdout);
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break;
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}
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(void)fputc('\n', stdout);
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}
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}
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} else {
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char *string;
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/* can't combine -p with a supplied string */
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if (prompt)
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usage();
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/* Perhaps it isn't worth worrying about, but... */
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if ((string = strdup(argv[optind])) == NULL)
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err(1, NULL);
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/* Wipe the argument. */
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(void)memset(argv[optind], 0, strlen(argv[optind]));
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print_passwd(string, operation, extra);
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(void)fputc('\n', stdout);
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/* Wipe our copy, before we free it. */
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(void)memset(string, 0, strlen(string));
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free(string);
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}
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return 0;
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}
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