mirror of git://anongit.mindrot.org/openssh.git
143 lines
3.5 KiB
C
143 lines
3.5 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"
|
|
|
|
#ifndef USE_PAM
|
|
|
|
RCSID("$Id: auth-passwd.c,v 1.20 2000/05/20 05:03:00 damien Exp $");
|
|
|
|
#include "packet.h"
|
|
#include "ssh.h"
|
|
#include "servconf.h"
|
|
#include "xmalloc.h"
|
|
|
|
#ifdef WITH_AIXAUTHENTICATE
|
|
# include <login.h>
|
|
#endif
|
|
#ifdef HAVE_HPUX_TRUSTED_SYSTEM_PW
|
|
# include <hpsecurity.h>
|
|
# include <prot.h>
|
|
#endif
|
|
#ifdef HAVE_SHADOW_H
|
|
# include <shadow.h>
|
|
#endif
|
|
#ifdef HAVE_GETPWANAM
|
|
# include <sys/label.h>
|
|
# include <sys/audit.h>
|
|
# include <pwdadj.h>
|
|
#endif
|
|
#if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT)
|
|
# include "md5crypt.h"
|
|
#endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */
|
|
|
|
/*
|
|
* 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;
|
|
char *pw_password;
|
|
char *salt;
|
|
#ifdef HAVE_SHADOW_H
|
|
struct spwd *spw;
|
|
#endif
|
|
#ifdef HAVE_GETPWANAM
|
|
struct passwd_adjunct *spw;
|
|
#endif
|
|
#ifdef WITH_AIXAUTHENTICATE
|
|
char *authmsg;
|
|
char *loginmsg;
|
|
int reenter = 1;
|
|
#endif
|
|
|
|
/* 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 WITH_AIXAUTHENTICATE
|
|
return (authenticate(pw->pw_name,password,&reenter,&authmsg) == 0);
|
|
#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;
|
|
|
|
pw_password = pw->pw_passwd;
|
|
|
|
#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
|
|
spw = getspnam(pw->pw_name);
|
|
if (spw != NULL)
|
|
{
|
|
/* Check for users with no password. */
|
|
if (strcmp(password, "") == 0 && strcmp(spw->sp_pwdp, "") == 0)
|
|
return 1;
|
|
|
|
pw_password = spw->sp_pwdp;
|
|
}
|
|
#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */
|
|
#if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW)
|
|
if (issecure() && (spw = getpwanam(pw->pw_name)) != NULL)
|
|
{
|
|
/* Check for users with no password. */
|
|
if (strcmp(password, "") == 0 && strcmp(spw->pwa_passwd, "") == 0)
|
|
return 1;
|
|
|
|
pw_password = spw->pwa_passwd;
|
|
}
|
|
#endif /* defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) */
|
|
|
|
if (pw_password[0] != '\0')
|
|
salt = pw_password;
|
|
else
|
|
salt = "xx";
|
|
|
|
#ifdef HAVE_MD5_PASSWORDS
|
|
if (is_md5_salt(salt))
|
|
encrypted_password = md5_crypt(password, salt);
|
|
else
|
|
encrypted_password = crypt(password, salt);
|
|
#else /* HAVE_MD5_PASSWORDS */
|
|
# ifdef HAVE_HPUX_TRUSTED_SYSTEM_PW
|
|
encrypted_password = bigcrypt(password, salt);
|
|
# else
|
|
encrypted_password = crypt(password, salt);
|
|
# endif /* HAVE_HPUX_TRUSTED_SYSTEM_PW */
|
|
#endif /* HAVE_MD5_PASSWORDS */
|
|
|
|
/* Authentication is accepted if the encrypted passwords are identical. */
|
|
return (strcmp(encrypted_password, pw_password) == 0);
|
|
}
|
|
#endif /* !USE_PAM */
|