2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2010 Alexander Barton (alex@barton.de).
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
11 * PAM User Authentification
29 #ifdef HAVE_SECURITY_PAM_APPL_H
30 #include <security/pam_appl.h>
33 #ifdef HAVE_PAM_PAM_APPL_H
34 #include <pam/pam_appl.h>
40 static char *password;
43 * PAM "conversation function".
44 * This is a callback function used by the PAM library to get the password.
45 * Please see the PAM documentation for details :-)
48 password_conversation(int num_msg, const struct pam_message **msg,
49 struct pam_response **resp, void *appdata_ptr) {
50 LogDebug("PAM: conv(%d, %d, '%s', '%s')",
51 num_msg, msg[0]->msg_style, msg[0]->msg, appdata_ptr);
53 /* Can we deal with this request? */
54 if (num_msg != 1 || msg[0]->msg_style != PAM_PROMPT_ECHO_OFF) {
55 Log(LOG_ERR, "PAM: Unexpected PAM conversation '%d:%s'!",
56 msg[0]->msg_style, msg[0]->msg);
61 /* Sometimes appdata_ptr gets lost!? */
62 appdata_ptr = password;
65 /* Duplicate password ("application data") for the PAM library */
66 *resp = calloc(num_msg, sizeof(struct pam_response));
68 Log(LOG_ERR, "PAM: Out of memory!");
72 (*resp)[0].resp = strdup((char *)appdata_ptr);
73 (*resp)[0].resp_retcode = 0;
75 return ((*resp)[0].resp ? PAM_SUCCESS : PAM_CONV_ERR);
79 * PAM "conversation" structure.
81 static struct pam_conv conv = {
82 &password_conversation,
87 * Authenticate a connectiong client using PAM.
88 * @param Client The client to authenticate.
89 * @return true when authentication succeeded, false otherwise.
92 PAM_Authenticate(CLIENT *Client) {
94 int retval = PAM_SUCCESS;
96 LogDebug("PAM: Authenticate \"%s\" (%s) ...",
97 Client_OrigUser(Client), Client_Mask(Client));
99 /* Set supplied client password */
102 password = strdup(Client_Password(Client));
103 conv.appdata_ptr = password;
106 retval = pam_start("ngircd", Client_OrigUser(Client), &conv, &pam);
107 if (retval != PAM_SUCCESS) {
108 Log(LOG_ERR, "PAM: Failed to create authenticator! (%d)", retval);
112 pam_set_item(pam, PAM_RUSER, Client_User(Client));
113 pam_set_item(pam, PAM_RHOST, Client_Hostname(Client));
114 #ifdef HAVE_PAM_FAIL_DELAY
115 pam_fail_delay(pam, 0);
118 /* PAM authentication ... */
119 retval = pam_authenticate(pam, 0);
122 if (retval == PAM_SUCCESS)
123 Log(LOG_INFO, "PAM: Authenticated \"%s\" (%s).",
124 Client_OrigUser(Client), Client_Mask(Client));
126 Log(LOG_ERR, "PAM: Error on \"%s\" (%s): %s",
127 Client_OrigUser(Client), Client_Mask(Client),
128 pam_strerror(pam, retval));
130 /* Free PAM structures */
131 if (pam_end(pam, retval) != PAM_SUCCESS)
132 Log(LOG_ERR, "PAM: Failed to release authenticator!");
134 return (retval == PAM_SUCCESS);