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);
51 * pam_sm_authenticate() authenticates users against the samba password file.
53 * First, obtain the password from the user. Then use a
54 * routine in 'support.c' to authenticate the user.
57 #define _SMB_AUTHTOK "-SMB-PASS"
59 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
60 int argc, const char **argv)
63 int retval, *ret_data = NULL;
64 SAM_ACCOUNT *sampass = NULL;
65 extern BOOL in_client;
69 /* Points to memory managed by the PAM library. Do not free. */
73 /* Samba initialization. */
74 setup_logging("pam_smbpass",False);
76 codepage_initialise(lp_client_code_page());
79 ctrl = set_ctrl(flags, argc, argv);
81 /* Get a few bytes so we can pass our return value to
83 ret_data = malloc(sizeof(int));
85 /* get the username */
86 retval = pam_get_user( pamh, &name, "Username: " );
87 if ( retval != PAM_SUCCESS ) {
88 if (on( SMB_DEBUG, ctrl )) {
89 _log_err(LOG_DEBUG, "auth: could not identify user");
93 if (on( SMB_DEBUG, ctrl )) {
94 _log_err( LOG_DEBUG, "username [%s] obtained", name );
97 if (!initialize_password_db(True)) {
98 _log_err( LOG_ALERT, "Cannot access samba password database" );
99 retval = PAM_AUTHINFO_UNAVAIL;
103 pdb_init_sam(&sampass);
105 found = pdb_getsampwnam( sampass, name );
107 if (on( SMB_MIGRATE, ctrl )) {
108 retval = _smb_add_user(pamh, ctrl, name, sampass, found);
109 pdb_free_sam(&sampass);
114 _log_err(LOG_ALERT, "Failed to find entry for user %s.", name);
115 retval = PAM_USER_UNKNOWN;
116 pdb_free_sam(&sampass);
121 /* if this user does not have a password... */
123 if (_smb_blankpasswd( ctrl, sampass )) {
124 pdb_free_sam(&sampass);
125 retval = PAM_SUCCESS;
129 /* get this user's authentication token */
131 retval = _smb_read_password(pamh, ctrl, NULL, "Password: ", NULL, _SMB_AUTHTOK, &p);
132 if (retval != PAM_SUCCESS ) {
133 _log_err(LOG_CRIT, "auth: no password provided for [%s]"
135 pdb_free_sam(&sampass);
139 /* verify the password of this user */
141 retval = _smb_verify_password( pamh, sampass, p, ctrl );
142 pdb_free_sam(&sampass);
148 * This function is for setting samba credentials. If anyone comes up
149 * with any credentials they think should be set, let me know.
152 int pam_sm_setcred(pam_handle_t *pamh, int flags,
153 int argc, const char **argv)
155 int retval, *pretval = NULL;
157 retval = PAM_SUCCESS;
159 pam_get_data(pamh, "smb_setcred_return", (const void **) &pretval);
164 pam_set_data(pamh, "smb_setcred_return", NULL, NULL);
170 /* Helper function for adding a user to the db. */
171 static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
172 const char *name, SAM_ACCOUNT *sampass, BOOL exist)
176 const char *pass = NULL;
182 /* Get the authtok; if we don't have one, silently fail. */
183 retval = pam_get_item( pamh, PAM_AUTHTOK, (const void **) &pass );
185 if (retval != PAM_SUCCESS) {
187 , "pam_get_item returned error to pam_sm_authenticate" );
188 return PAM_AUTHTOK_RECOVER_ERR;
189 } else if (pass == NULL) {
190 return PAM_AUTHTOK_RECOVER_ERR;
193 /* Add the user to the db if they aren't already there. */
195 retval = local_password_change( name, LOCAL_ADD_USER,
198 msg_str, sizeof(msg_str) );
199 if (!retval && *err_str)
201 err_str[PSTRING_LEN-1] = '\0';
202 make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
206 msg_str[PSTRING_LEN-1] = '\0';
207 make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
214 /* Change the user's password IFF it's null. */
215 if ((pdb_get_lanman_passwd(sampass) == NULL) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ))
217 retval = local_password_change( name, 0, pass, err_str, sizeof(err_str),
218 msg_str, sizeof(msg_str) );
219 if (!retval && *err_str)
221 err_str[PSTRING_LEN-1] = '\0';
222 make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
226 msg_str[PSTRING_LEN-1] = '\0';
227 make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
238 /* static module data */
240 struct pam_module _pam_smbpass_auth_modstruct = {