1 /* Unix NT password database implementation, version 0.7.5.
3 * This program is free software; you can redistribute it and/or modify it under
4 * the terms of the GNU General Public License as published by the Free
5 * Software Foundation; either version 2 of the License, or (at your option)
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 675
15 * Mass Ave, Cambridge, MA 02139, USA.
18 /* indicate the following groups are defined */
26 /* This is only used in the Sun implementation. */
27 #include <security/pam_appl.h>
31 #include <security/pam_modules.h>
41 pam_set_data( pamh, "smb_setcred_return" \
42 , (void *) ret_data, NULL ); \
47 static int _smb_add_user(pam_handle_t
*pamh
, unsigned int ctrl
,
48 const char *name
, SAM_ACCOUNT
*sampass
, BOOL exist
);
52 * pam_sm_authenticate() authenticates users against the samba password file.
54 * First, obtain the password from the user. Then use a
55 * routine in 'support.c' to authenticate the user.
58 #define _SMB_AUTHTOK "-SMB-PASS"
60 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
61 int argc
, const char **argv
)
64 int retval
, *ret_data
= NULL
;
65 SAM_ACCOUNT
*sampass
= NULL
;
66 extern BOOL in_client
;
70 /* Points to memory managed by the PAM library. Do not free. */
74 /* Samba initialization. */
75 setup_logging("pam_smbpass",False
);
78 ctrl
= set_ctrl(flags
, argc
, argv
);
80 /* Get a few bytes so we can pass our return value to
82 ret_data
= malloc(sizeof(int));
84 /* get the username */
85 retval
= pam_get_user( pamh
, &name
, "Username: " );
86 if ( retval
!= PAM_SUCCESS
) {
87 if (on( SMB_DEBUG
, ctrl
)) {
88 _log_err(LOG_DEBUG
, "auth: could not identify user");
92 if (on( SMB_DEBUG
, ctrl
)) {
93 _log_err( LOG_DEBUG
, "username [%s] obtained", name
);
96 if (!initialize_password_db(True
)) {
97 _log_err( LOG_ALERT
, "Cannot access samba password database" );
98 retval
= PAM_AUTHINFO_UNAVAIL
;
102 pdb_init_sam(&sampass
);
104 found
= pdb_getsampwnam( sampass
, name
);
106 if (on( SMB_MIGRATE
, ctrl
)) {
107 retval
= _smb_add_user(pamh
, ctrl
, name
, sampass
, found
);
108 pdb_free_sam(&sampass
);
113 _log_err(LOG_ALERT
, "Failed to find entry for user %s.", name
);
114 retval
= PAM_USER_UNKNOWN
;
115 pdb_free_sam(&sampass
);
120 /* if this user does not have a password... */
122 if (_smb_blankpasswd( ctrl
, sampass
)) {
123 pdb_free_sam(&sampass
);
124 retval
= PAM_SUCCESS
;
128 /* get this user's authentication token */
130 retval
= _smb_read_password(pamh
, ctrl
, NULL
, "Password: ", NULL
, _SMB_AUTHTOK
, &p
);
131 if (retval
!= PAM_SUCCESS
) {
132 _log_err(LOG_CRIT
, "auth: no password provided for [%s]"
134 pdb_free_sam(&sampass
);
138 /* verify the password of this user */
140 retval
= _smb_verify_password( pamh
, sampass
, p
, ctrl
);
141 pdb_free_sam(&sampass
);
147 * This function is for setting samba credentials. If anyone comes up
148 * with any credentials they think should be set, let me know.
151 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
152 int argc
, const char **argv
)
154 int retval
, *pretval
= NULL
;
156 retval
= PAM_SUCCESS
;
158 pam_get_data(pamh
, "smb_setcred_return", (const void **) &pretval
);
163 pam_set_data(pamh
, "smb_setcred_return", NULL
, NULL
);
169 /* Helper function for adding a user to the db. */
170 static int _smb_add_user(pam_handle_t
*pamh
, unsigned int ctrl
,
171 const char *name
, SAM_ACCOUNT
*sampass
, BOOL exist
)
175 const char *pass
= NULL
;
181 /* Get the authtok; if we don't have one, silently fail. */
182 retval
= pam_get_item( pamh
, PAM_AUTHTOK
, (const void **) &pass
);
184 if (retval
!= PAM_SUCCESS
) {
186 , "pam_get_item returned error to pam_sm_authenticate" );
187 return PAM_AUTHTOK_RECOVER_ERR
;
188 } else if (pass
== NULL
) {
189 return PAM_AUTHTOK_RECOVER_ERR
;
192 /* Add the user to the db if they aren't already there. */
194 retval
= local_password_change( name
, LOCAL_ADD_USER
,
197 msg_str
, sizeof(msg_str
) );
198 if (!retval
&& *err_str
)
200 err_str
[PSTRING_LEN
-1] = '\0';
201 make_remark( pamh
, ctrl
, PAM_ERROR_MSG
, err_str
);
205 msg_str
[PSTRING_LEN
-1] = '\0';
206 make_remark( pamh
, ctrl
, PAM_TEXT_INFO
, msg_str
);
213 /* Change the user's password IFF it's null. */
214 if ((pdb_get_lanman_passwd(sampass
) == NULL
) && (pdb_get_acct_ctrl(sampass
) & ACB_PWNOTREQ
))
216 retval
= local_password_change( name
, 0, pass
, err_str
, sizeof(err_str
),
217 msg_str
, sizeof(msg_str
) );
218 if (!retval
&& *err_str
)
220 err_str
[PSTRING_LEN
-1] = '\0';
221 make_remark( pamh
, ctrl
, PAM_ERROR_MSG
, err_str
);
225 msg_str
[PSTRING_LEN
-1] = '\0';
226 make_remark( pamh
, ctrl
, PAM_TEXT_INFO
, msg_str
);
237 /* static module data */
239 struct pam_module _pam_smbpass_auth_modstruct
= {