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>
39 /* Restore application signal handler */ \
40 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler); \
43 pam_set_data( pamh, "smb_setcred_return" \
44 , (void *) ret_data, NULL ); \
49 static int _smb_add_user(pam_handle_t
*pamh
, unsigned int ctrl
,
50 const char *name
, struct samu
*sampass
, BOOL exist
);
54 * pam_sm_authenticate() authenticates users against the samba password file.
56 * First, obtain the password from the user. Then use a
57 * routine in 'support.c' to authenticate the user.
60 #define _SMB_AUTHTOK "-SMB-PASS"
62 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
63 int argc
, const char **argv
)
66 int retval
, *ret_data
= NULL
;
67 struct samu
*sampass
= NULL
;
68 extern BOOL in_client
;
70 void (*oldsig_handler
)(int) = NULL
;
73 /* Points to memory managed by the PAM library. Do not free. */
76 /* Samba initialization. */
78 setup_logging("pam_smbpass",False
);
81 ctrl
= set_ctrl(flags
, argc
, argv
);
83 /* Get a few bytes so we can pass our return value to
85 ret_data
= SMB_MALLOC_P(int);
87 /* we need to do this before we call AUTH_RETURN */
88 /* Getting into places that might use LDAP -- protect the app
89 from a SIGPIPE it's not expecting */
90 oldsig_handler
= CatchSignal(SIGPIPE
, SIGNAL_CAST SIG_IGN
);
92 /* get the username */
93 retval
= pam_get_user( pamh
, &name
, "Username: " );
94 if ( retval
!= PAM_SUCCESS
) {
95 if (on( SMB_DEBUG
, ctrl
)) {
96 _log_err(LOG_DEBUG
, "auth: could not identify user");
100 if (on( SMB_DEBUG
, ctrl
)) {
101 _log_err( LOG_DEBUG
, "username [%s] obtained", name
);
104 if (geteuid() != 0) {
105 _log_err(LOG_DEBUG
, "Cannot access samba password database, not running as root.");
106 retval
= PAM_AUTHINFO_UNAVAIL
;
110 if (!initialize_password_db(True
)) {
111 _log_err( LOG_ALERT
, "Cannot access samba password database" );
112 retval
= PAM_AUTHINFO_UNAVAIL
;
116 sampass
= samu_new( NULL
);
118 _log_err( LOG_ALERT
, "Cannot talloc a samu struct" );
119 retval
= nt_status_to_pam(NT_STATUS_NO_MEMORY
);
123 found
= pdb_getsampwnam( sampass
, name
);
125 if (on( SMB_MIGRATE
, ctrl
)) {
126 retval
= _smb_add_user(pamh
, ctrl
, name
, sampass
, found
);
127 TALLOC_FREE(sampass
);
132 _log_err(LOG_ALERT
, "Failed to find entry for user %s.", name
);
133 retval
= PAM_USER_UNKNOWN
;
134 TALLOC_FREE(sampass
);
139 /* if this user does not have a password... */
141 if (_smb_blankpasswd( ctrl
, sampass
)) {
142 TALLOC_FREE(sampass
);
143 retval
= PAM_SUCCESS
;
147 /* get this user's authentication token */
149 retval
= _smb_read_password(pamh
, ctrl
, NULL
, "Password: ", NULL
, _SMB_AUTHTOK
, &p
);
150 if (retval
!= PAM_SUCCESS
) {
151 _log_err(LOG_CRIT
, "auth: no password provided for [%s]", name
);
152 TALLOC_FREE(sampass
);
156 /* verify the password of this user */
158 retval
= _smb_verify_password( pamh
, sampass
, p
, ctrl
);
159 TALLOC_FREE(sampass
);
165 * This function is for setting samba credentials. If anyone comes up
166 * with any credentials they think should be set, let me know.
169 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
170 int argc
, const char **argv
)
172 int retval
, *pretval
= NULL
;
174 retval
= PAM_SUCCESS
;
176 pam_get_data(pamh
, "smb_setcred_return", (const void **) &pretval
);
181 pam_set_data(pamh
, "smb_setcred_return", NULL
, NULL
);
187 /* Helper function for adding a user to the db. */
188 static int _smb_add_user(pam_handle_t
*pamh
, unsigned int ctrl
,
189 const char *name
, struct samu
*sampass
, BOOL exist
)
193 const char *pass
= NULL
;
199 /* Get the authtok; if we don't have one, silently fail. */
200 retval
= pam_get_item( pamh
, PAM_AUTHTOK
, (const void **) &pass
);
202 if (retval
!= PAM_SUCCESS
) {
204 , "pam_get_item returned error to pam_sm_authenticate" );
205 return PAM_AUTHTOK_RECOVER_ERR
;
206 } else if (pass
== NULL
) {
207 return PAM_AUTHTOK_RECOVER_ERR
;
210 /* Add the user to the db if they aren't already there. */
212 retval
= NT_STATUS_IS_OK(local_password_change( name
, LOCAL_ADD_USER
|LOCAL_SET_PASSWORD
,
215 msg_str
, sizeof(msg_str
) ));
216 if (!retval
&& *err_str
)
218 err_str
[PSTRING_LEN
-1] = '\0';
219 make_remark( pamh
, ctrl
, PAM_ERROR_MSG
, err_str
);
223 msg_str
[PSTRING_LEN
-1] = '\0';
224 make_remark( pamh
, ctrl
, PAM_TEXT_INFO
, msg_str
);
231 /* mimick 'update encrypted' as long as the 'no pw req' flag is not set */
232 if ( pdb_get_acct_ctrl(sampass
) & ~ACB_PWNOTREQ
)
234 retval
= NT_STATUS_IS_OK(local_password_change( name
, LOCAL_SET_PASSWORD
, pass
, err_str
, sizeof(err_str
),
235 msg_str
, sizeof(msg_str
) ));
236 if (!retval
&& *err_str
)
238 err_str
[PSTRING_LEN
-1] = '\0';
239 make_remark( pamh
, ctrl
, PAM_ERROR_MSG
, err_str
);
243 msg_str
[PSTRING_LEN
-1] = '\0';
244 make_remark( pamh
, ctrl
, PAM_TEXT_INFO
, msg_str
);
255 /* static module data */
257 struct pam_module _pam_smbpass_auth_modstruct
= {