1 /* vi: set sw=4 ts=4: */
3 * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 /* Ask the user for a password.
45 Return 1 if the user gives the correct password for entry PW,
46 0 if not. Return 1 without asking for a password if run by UID 0
47 or if PW has an empty password. */
49 int correct_password ( const struct passwd *pw )
51 char *unencrypted, *encrypted, *correct;
53 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
54 if (( strcmp ( pw-> pw_passwd, "x" ) == 0 ) || ( strcmp ( pw-> pw_passwd, "*" ) == 0 )) {
55 struct spwd *sp = getspnam ( pw-> pw_name );
58 bb_error_msg_and_die ( "no valid shadow password" );
60 correct = sp-> sp_pwdp;
64 correct = pw-> pw_passwd;
66 if ( correct == 0 || correct[0] == '\0' )
69 unencrypted = getpass ( "Password: " );
72 fputs ( "getpass: cannot open /dev/tty\n", stderr );
75 encrypted = crypt ( unencrypted, correct );
76 memset ( unencrypted, 0, bb_strlen ( unencrypted ));
77 return ( strcmp ( encrypted, correct ) == 0 ) ? 1 : 0;