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.
18 * PAM User Authentication
31 #ifdef HAVE_SECURITY_PAM_APPL_H
32 #include <security/pam_appl.h>
35 #ifdef HAVE_PAM_PAM_APPL_H
36 #include <pam/pam_appl.h>
41 static char *password;
44 * PAM "conversation function".
45 * This is a callback function used by the PAM library to get the password.
46 * Please see the PAM documentation for details :-)
49 password_conversation(int num_msg, const struct pam_message **msg,
50 struct pam_response **resp, void *appdata_ptr) {
51 LogDebug("PAM: conv(%d, %d, '%s', '%s')",
52 num_msg, msg[0]->msg_style, msg[0]->msg, appdata_ptr);
54 /* Can we deal with this request? */
55 if (num_msg != 1 || msg[0]->msg_style != PAM_PROMPT_ECHO_OFF) {
56 Log(LOG_ERR, "PAM: Unexpected PAM conversation '%d:%s'!",
57 msg[0]->msg_style, msg[0]->msg);
62 /* Sometimes appdata_ptr gets lost!? */
63 appdata_ptr = password;
66 /* Duplicate password ("application data") for the PAM library */
67 *resp = calloc(num_msg, sizeof(struct pam_response));
69 Log(LOG_ERR, "PAM: Out of memory!");
73 (*resp)[0].resp = strdup((char *)appdata_ptr);
74 (*resp)[0].resp_retcode = 0;
76 return ((*resp)[0].resp ? PAM_SUCCESS : PAM_CONV_ERR);
80 * PAM "conversation" structure.
82 static struct pam_conv conv = {
83 &password_conversation,
88 * Authenticate a connecting client using PAM.
89 * @param Client The client to authenticate.
90 * @return true when authentication succeeded, false otherwise.
93 PAM_Authenticate(CLIENT *Client) {
95 int retval = PAM_SUCCESS;
97 LogDebug("PAM: Authenticate \"%s\" (%s) ...",
98 Client_OrigUser(Client), Client_Mask(Client));
100 /* Set supplied client password */
103 password = strdup(Conn_Password(Client_Conn(Client)));
104 conv.appdata_ptr = Conn_Password(Client_Conn(Client));
107 retval = pam_start("ngircd", Client_OrigUser(Client), &conv, &pam);
108 if (retval != PAM_SUCCESS) {
109 Log(LOG_ERR, "PAM: Failed to create authenticator! (%d)", retval);
113 pam_set_item(pam, PAM_RUSER, Client_User(Client));
114 pam_set_item(pam, PAM_RHOST, Client_Hostname(Client));
115 #if defined(HAVE_PAM_FAIL_DELAY) && !defined(NO_PAM_FAIL_DELAY)
116 pam_fail_delay(pam, 0);
119 /* PAM authentication ... */
120 retval = pam_authenticate(pam, 0);
123 if (retval == PAM_SUCCESS)
124 Log(LOG_INFO, "PAM: Authenticated \"%s\" (%s).",
125 Client_OrigUser(Client), Client_Mask(Client));
127 Log(LOG_ERR, "PAM: Error on \"%s\" (%s): %s",
128 Client_OrigUser(Client), Client_Mask(Client),
129 pam_strerror(pam, retval));
131 /* Free PAM structures */
132 if (pam_end(pam, retval) != PAM_SUCCESS)
133 Log(LOG_ERR, "PAM: Failed to release authenticator!");
135 return (retval == PAM_SUCCESS);