[openssh.git] / auth-passwd.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("$Id$");

#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
#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 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 (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 */
Commit	Line	Data
8efc0c15	1	/*
5260325f	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
	5	* Created: Sat Mar 18 05:11:38 1995 ylo
	6	* Password authentication. This file contains the functions to check whether
	7	* the password is valid for the user.
	8	*/
8efc0c15	9
8efc0c15	10	#include "includes.h"
caf3bc51	11
d94aa2ae	12	#ifndef USE_PAM
caf3bc51	13
8efc0c15	14	RCSID("$Id$");
	15
	16	#include "packet.h"
	17	#include "ssh.h"
	18	#include "servconf.h"
	19	#include "xmalloc.h"
b2344d54	20
4c40f834	21	#ifdef WITH_AIXAUTHENTICATE
2b763e31	22	# include <login.h>
	23	#endif
	24	#ifdef HAVE_HPUX_TRUSTED_SYSTEM_PW
	25	# include <hpsecurity.h>
	26	# include <prot.h>
4c40f834	27	#endif
b2344d54	28	#ifdef HAVE_SHADOW_H
d94aa2ae	29	# include <shadow.h>
caf3bc51	30	#endif
d94aa2ae	31	#if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT)
	32	# include "md5crypt.h"
	33	#endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */
caf3bc51	34
5260325f	35	/*
	36	* Tries to authenticate the user using password. Returns true if
	37	* authentication succeeds.
	38	*/
6ae2364d	39	int
5260325f	40	auth_password(struct passwd * pw, const char *password)
8efc0c15	41	{
5260325f	42	extern ServerOptions options;
5260325f	43	char *encrypted_password;
f498ed15	44	char *pw_password;
f498ed15	45	char *salt;
b2344d54	46	#ifdef HAVE_SHADOW_H
5260325f	47	struct spwd *spw;
b2344d54	48	#endif
4c40f834	49	#ifdef WITH_AIXAUTHENTICATE
	50	char *authmsg;
	51	char *loginmsg;
	52	int reenter = 1;
	53	#endif
8efc0c15	54
13f825f4	55	/* deny if no user. */
	56	if (pw == NULL)
	57	return 0;
aa3378df	58	if (pw->pw_uid == 0 && options.permit_root_login == 2)
5260325f	59	return 0;
aa3378df	60	if (*password == '\0' && options.permit_empty_passwd == 0)
5260325f	61	return 0;
8efc0c15	62
8efc0c15	63	#ifdef SKEY
5260325f	64	if (options.skey_authentication == 1) {
57112b5a	65	int ret = auth_skey_password(pw, password);
	66	if (ret == 1 \|\| ret == 0)
	67	return ret;
5260325f	68	/* Fall back to ordinary passwd authentication. */
5260325f	69	}
8efc0c15	70	#endif
4c40f834	71
	72	#ifdef WITH_AIXAUTHENTICATE
	73	return (authenticate(pw->pw_name,password,&reenter,&authmsg) == 0);
	74	#endif
	75
57112b5a	76	#ifdef KRB4
	77	if (options.kerberos_authentication == 1) {
	78	int ret = auth_krb4_password(pw, password);
	79	if (ret == 1 \|\| ret == 0)
	80	return ret;
5260325f	81	/* Fall back to ordinary passwd authentication. */
8efc0c15	82	}
57112b5a	83	#endif
5260325f	84
5260325f	85	/* Check for users with no password. */
aa3378df	86	if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0)
5260325f	87	return 1;
8efc0c15	88
f498ed15	89	pw_password = pw->pw_passwd;
f498ed15	90
59dd7a31	91	#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
5260325f	92	spw = getspnam(pw->pw_name);
76b8607f	93	if (spw != NULL)
	94	{
	95	/* Check for users with no password. */
	96	if (strcmp(password, "") == 0 && strcmp(spw->sp_pwdp, "") == 0)
	97	return 1;
b2344d54	98
76b8607f	99	pw_password = spw->sp_pwdp;
76b8607f	100	}
f498ed15	101	#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */
b2344d54	102
f498ed15	103	if (pw_password[0] != '\0')
f498ed15	104	salt = pw_password;
5260325f	105	else
f498ed15	106	salt = "xx";
59dd7a31	107
59dd7a31	108	#ifdef HAVE_MD5_PASSWORDS
f498ed15	109	if (is_md5_salt(salt))
f498ed15	110	encrypted_password = md5_crypt(password, salt);
59dd7a31	111	else
f498ed15	112	encrypted_password = crypt(password, salt);
59dd7a31	113	#else /* HAVE_MD5_PASSWORDS */
2b763e31	114	# ifdef HAVE_HPUX_TRUSTED_SYSTEM_PW
	115	encrypted_password = bigcrypt(password, salt);
	116	# else
f498ed15	117	encrypted_password = crypt(password, salt);
2b763e31	118	# endif /* HAVE_HPUX_TRUSTED_SYSTEM_PW */
59dd7a31	119	#endif /* HAVE_MD5_PASSWORDS */
b2344d54	120
5260325f	121	/* Authentication is accepted if the encrypted passwords are identical. */
f498ed15	122	return (strcmp(encrypted_password, pw_password) == 0);
8efc0c15	123	}
d94aa2ae	124	#endif /* !USE_PAM */