78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
|
|
* 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. Neither the name of Julianne F. Haugh nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH 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 JULIE HAUGH 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 "libbb.h"
|
|
|
|
/* Ask the user for a password.
|
|
* Return 1 if the user gives the correct password for entry PW,
|
|
* 0 if not. Return 1 without asking if PW has an empty password.
|
|
*
|
|
* NULL pw means "just fake it for login with bad username" */
|
|
|
|
int correct_password(const struct passwd *pw)
|
|
{
|
|
char *unencrypted, *encrypted;
|
|
const char *correct;
|
|
#if ENABLE_FEATURE_SHADOWPASSWDS
|
|
/* Using _r function to avoid pulling in static buffers */
|
|
struct spwd spw;
|
|
struct spwd *result;
|
|
char buffer[256];
|
|
#endif
|
|
|
|
/* fake salt. crypt() can choke otherwise. */
|
|
correct = "aa";
|
|
if (!pw) {
|
|
/* "aa" will never match */
|
|
goto fake_it;
|
|
}
|
|
correct = pw->pw_passwd;
|
|
#if ENABLE_FEATURE_SHADOWPASSWDS
|
|
if (LONE_CHAR(pw->pw_passwd, 'x') || LONE_CHAR(pw->pw_passwd, '*')) {
|
|
if (getspnam_r(pw->pw_name, &spw, buffer, sizeof(buffer), &result))
|
|
bb_error_msg("no valid shadow password, checking ordinary one");
|
|
else
|
|
correct = spw.sp_pwdp;
|
|
}
|
|
#endif
|
|
|
|
if (!correct || correct[0] == '\0')
|
|
return 1;
|
|
|
|
fake_it:
|
|
unencrypted = bb_askpass(0, "Password: ");
|
|
if (!unencrypted) {
|
|
return 0;
|
|
}
|
|
encrypted = crypt(unencrypted, correct);
|
|
memset(unencrypted, 0, strlen(unencrypted));
|
|
return strcmp(encrypted, correct) == 0;
|
|
}
|