mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-26 21:13:11 +01:00
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
|
/*
|
||
|
|
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
||
|
|
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
||
|
|
* All rights reserved
|
||
|
|
* Created: Sat Mar 18 05:11:38 1995 ylo
|
||
|
|
* Password authentication. This file contains the functions to check whether
|
||
|
|
* the password is valid for the user.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "includes.h"
|
||
|
|
RCSID("$Id: auth-passwd.c,v 1.14 1999/12/29 12:47:46 markus Exp $");
|
||
|
|
|
||
|
|
#include "packet.h"
|
||
|
|
#include "ssh.h"
|
||
|
|
#include "servconf.h"
|
||
|
|
#include "xmalloc.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Tries to authenticate the user using password. Returns true if
|
||
|
|
* authentication succeeds.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
auth_password(struct passwd * pw, const char *password)
|
||
|
|
{
|
||
|
|
extern ServerOptions options;
|
||
|
|
char *encrypted_password;
|
||
|
|
|
||
|
|
/* deny if no user. */
|
||
|
|
if (pw == NULL)
|
||
|
|
return 0;
|
||
|
|
if (pw->pw_uid == 0 && options.permit_root_login == 2)
|
||
|
|
return 0;
|
||
|
|
if (*password == '\0' && options.permit_empty_passwd == 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
#ifdef SKEY
|
||
|
|
if (options.skey_authentication == 1) {
|
||
|
|
int ret = auth_skey_password(pw, password);
|
||
|
|
if (ret == 1 || ret == 0)
|
||
|
|
return ret;
|
||
|
|
/* Fall back to ordinary passwd authentication. */
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#ifdef KRB4
|
||
|
|
if (options.kerberos_authentication == 1) {
|
||
|
|
int ret = auth_krb4_password(pw, password);
|
||
|
|
if (ret == 1 || ret == 0)
|
||
|
|
return ret;
|
||
|
|
/* Fall back to ordinary passwd authentication. */
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Check for users with no password. */
|
||
|
|
if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0)
|
||
|
|
return 1;
|
||
|
|
/* Encrypt the candidate password using the proper salt. */
|
||
|
|
encrypted_password = crypt(password,
|
||
|
|
(pw->pw_passwd[0] && pw->pw_passwd[1]) ? pw->pw_passwd : "xx");
|
||
|
|
|
||
|
|
/* Authentication is accepted if the encrypted passwords are identical. */
|
||
|
|
return (strcmp(encrypted_password, pw->pw_passwd) == 0);
|
||
|
|
}
|