/* 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 <stdio.h> #include <errno.h> #include <unistd.h> #include <string.h> #include <stdlib.h> #include <syslog.h> #include <ctype.h> #include <crypt.h> #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 for a password if run by UID 0 or if PW has an empty password. */ int correct_password ( const struct passwd *pw ) { char *unencrypted, *encrypted, *correct; #ifdef CONFIG_FEATURE_SHADOWPASSWDS if (( strcmp ( pw-> pw_passwd, "x" ) == 0 ) || ( strcmp ( pw-> pw_passwd, "*" ) == 0 )) { struct spwd *sp = getspnam ( pw-> pw_name ); if ( !sp ) bb_error_msg_and_die ( "\nno valid shadow password" ); correct = sp-> sp_pwdp; } else #endif correct = pw-> pw_passwd; if ( correct == 0 || correct[0] == '\0' ) return 1; unencrypted = bb_askpass ( 0, "Password: " ); if ( !unencrypted ) { return 0; } encrypted = crypt ( unencrypted, correct ); memset ( unencrypted, 0, strlen ( unencrypted )); return ( strcmp ( encrypted, correct ) == 0 ) ? 1 : 0; }