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. */
77 /* 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 (!initialize_password_db(True)) {
105 _log_err( LOG_ALERT, "Cannot access samba password database" );
106 retval = PAM_AUTHINFO_UNAVAIL;
110 pdb_init_sam(&sampass);
112 found = pdb_getsampwnam( sampass, name );
114 if (on( SMB_MIGRATE, ctrl )) {
115 retval = _smb_add_user(pamh, ctrl, name, sampass, found);
116 TALLOC_FREE(sampass);
121 _log_err(LOG_ALERT, "Failed to find entry for user %s.", name);
122 retval = PAM_USER_UNKNOWN;
123 TALLOC_FREE(sampass);
128 /* if this user does not have a password... */
130 if (_smb_blankpasswd( ctrl, sampass )) {
131 TALLOC_FREE(sampass);
132 retval = PAM_SUCCESS;
136 /* get this user's authentication token */
138 retval = _smb_read_password(pamh, ctrl, NULL, "Password: ", NULL, _SMB_AUTHTOK, &p);
139 if (retval != PAM_SUCCESS ) {
140 _log_err(LOG_CRIT, "auth: no password provided for [%s]"
142 TALLOC_FREE(sampass);
146 /* verify the password of this user */
148 retval = _smb_verify_password( pamh, sampass, p, ctrl );
149 TALLOC_FREE(sampass);
155 * This function is for setting samba credentials. If anyone comes up
156 * with any credentials they think should be set, let me know.
159 int pam_sm_setcred(pam_handle_t *pamh, int flags,
160 int argc, const char **argv)
162 int retval, *pretval = NULL;
164 retval = PAM_SUCCESS;
166 pam_get_data(pamh, "smb_setcred_return", (const void **) &pretval);
171 pam_set_data(pamh, "smb_setcred_return", NULL, NULL);
177 /* Helper function for adding a user to the db. */
178 static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
179 const char *name, struct samu *sampass, BOOL exist)
183 const char *pass = NULL;
189 /* Get the authtok; if we don't have one, silently fail. */
190 retval = pam_get_item( pamh, PAM_AUTHTOK, (const void **) &pass );
192 if (retval != PAM_SUCCESS) {
194 , "pam_get_item returned error to pam_sm_authenticate" );
195 return PAM_AUTHTOK_RECOVER_ERR;
196 } else if (pass == NULL) {
197 return PAM_AUTHTOK_RECOVER_ERR;
200 /* Add the user to the db if they aren't already there. */
202 retval = NT_STATUS_IS_OK(local_password_change( name, LOCAL_ADD_USER|LOCAL_SET_PASSWORD,
205 msg_str, sizeof(msg_str) ));
206 if (!retval && *err_str)
208 err_str[PSTRING_LEN-1] = '\0';
209 make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
213 msg_str[PSTRING_LEN-1] = '\0';
214 make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
221 /* mimick 'update encrypted' as long as the 'no pw req' flag is not set */
222 if ( pdb_get_acct_ctrl(sampass) & ~ACB_PWNOTREQ )
224 retval = NT_STATUS_IS_OK(local_password_change( name, LOCAL_SET_PASSWORD, pass, err_str, sizeof(err_str),
225 msg_str, sizeof(msg_str) ));
226 if (!retval && *err_str)
228 err_str[PSTRING_LEN-1] = '\0';
229 make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
233 msg_str[PSTRING_LEN-1] = '\0';
234 make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
245 /* static module data */
247 struct pam_module _pam_smbpass_auth_modstruct = {