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/*
* Copyright (c) 2005 The SCO Group. All rights reserved.
* Copyright (c) 2005 Tim Rice. 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 THE AUTHOR ``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 THE AUTHOR 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 "includes.h"
#if defined(HAVE_LIBIAF) && !defined(HAVE_SECUREWARE)
#include <sys/types.h>
#ifdef HAVE_CRYPT_H
# include <crypt.h>
#endif
#include <pwd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "xmalloc.h"
#include "packet.h"
#include "auth-options.h"
#include "log.h"
#include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */
#include "servconf.h"
#include "hostfile.h"
#include "auth.h"
#include "ssh.h"
#include "ssh_api.h"
int nischeck(char *);
int
sys_auth_passwd(struct ssh *ssh, const char *password)
{
Authctxt *authctxt = ssh->authctxt;
struct passwd *pw = authctxt->pw;
char *salt;
int result;
/* Just use the supplied fake password if authctxt is invalid */
char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
if (pw_password == NULL)
return 0;
/* Check for users with no password. */
if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
return (1);
/* Encrypt the candidate password using the proper salt. */
salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx";
/*
* Authentication is accepted if the encrypted passwords
* are identical.
*/
#ifdef UNIXWARE_LONG_PASSWORDS
if (!nischeck(pw->pw_name)) {
result = ((strcmp(bigcrypt(password, salt), pw_password) == 0)
|| (strcmp(osr5bigcrypt(password, salt), pw_password) == 0));
}
else
#endif /* UNIXWARE_LONG_PASSWORDS */
result = (strcmp(xcrypt(password, salt), pw_password) == 0);
#ifdef USE_LIBIAF
if (authctxt->valid)
free(pw_password);
#endif
return(result);
}
#ifdef UNIXWARE_LONG_PASSWORDS
int
nischeck(char *namep)
{
char password_file[] = "/etc/passwd";
FILE *fd;
struct passwd *ent = NULL;
if ((fd = fopen (password_file, "r")) == NULL) {
/*
* If the passwd file has disappeared we are in a bad state.
* However, returning 0 will send us back through the
* authentication scheme that has checked the ia database for
* passwords earlier.
*/
return(0);
}
/*
* fgetpwent() only reads from password file, so we know for certain
* that the user is local.
*/
while (ent = fgetpwent(fd)) {
if (strcmp (ent->pw_name, namep) == 0) {
/* Local user */
fclose (fd);
return(0);
}
}
fclose (fd);
return (1);
}
#endif /* UNIXWARE_LONG_PASSWORDS */
/*
NOTE: ia_get_logpwd() allocates memory for arg 2
functions that call shadow_pw() will need to free
*/
#ifdef USE_LIBIAF
char *
get_iaf_password(struct passwd *pw)
{
char *pw_password = NULL;
uinfo_t uinfo;
if (!ia_openinfo(pw->pw_name,&uinfo)) {
ia_get_logpwd(uinfo, &pw_password);
if (pw_password == NULL)
fatal("ia_get_logpwd: Unable to get the shadow passwd");
ia_closeinfo(uinfo);
return pw_password;
}
else
fatal("ia_openinfo: Unable to open the shadow passwd file");
}
#endif /* USE_LIBIAF */
#endif /* HAVE_LIBIAF and not HAVE_SECUREWARE */
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