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
32 #ifdef HAVE_SECURITY_PAM_APPL_H
33 #include <security/pam_appl.h>
36 #ifdef HAVE_PAM_PAM_APPL_H
37 #include <pam/pam_appl.h>
43 static char *password;
46 * PAM "conversation function".
47 * This is a callback function used by the PAM library to get the password.
48 * Please see the PAM documentation for details :-)
51 password_conversation(int num_msg, const struct pam_message **msg,
52 struct pam_response **resp, void *appdata_ptr) {
53 LogDebug("PAM: conv(%d, %d, '%s', '%s')",
54 num_msg, msg[0]->msg_style, msg[0]->msg, appdata_ptr);
56 /* Can we deal with this request? */
57 if (num_msg != 1 || msg[0]->msg_style != PAM_PROMPT_ECHO_OFF) {
58 Log(LOG_ERR, "PAM: Unexpected PAM conversation '%d:%s'!",
59 msg[0]->msg_style, msg[0]->msg);
64 /* Sometimes appdata_ptr gets lost!? */
65 appdata_ptr = password;
68 /* Duplicate password ("application data") for the PAM library */
69 *resp = calloc(num_msg, sizeof(struct pam_response));
71 Log(LOG_ERR, "PAM: Out of memory!");
75 (*resp)[0].resp = strdup((char *)appdata_ptr);
76 (*resp)[0].resp_retcode = 0;
78 return ((*resp)[0].resp ? PAM_SUCCESS : PAM_CONV_ERR);
82 * PAM "conversation" structure.
84 static struct pam_conv conv = {
85 &password_conversation,
90 * Authenticate a connectiong client using PAM.
91 * @param Client The client to authenticate.
92 * @return true when authentication succeeded, false otherwise.
95 PAM_Authenticate(CLIENT *Client) {
97 int retval = PAM_SUCCESS;
99 LogDebug("PAM: Authenticate \"%s\" (%s) ...",
100 Client_OrigUser(Client), Client_Mask(Client));
102 /* Set supplied client password */
105 password = strdup(Conn_Password(Client_Conn(Client)));
106 conv.appdata_ptr = Conn_Password(Client_Conn(Client));
109 retval = pam_start("ngircd", Client_OrigUser(Client), &conv, &pam);
110 if (retval != PAM_SUCCESS) {
111 Log(LOG_ERR, "PAM: Failed to create authenticator! (%d)", retval);
115 pam_set_item(pam, PAM_RUSER, Client_User(Client));
116 pam_set_item(pam, PAM_RHOST, Client_Hostname(Client));
117 #if defined(HAVE_PAM_FAIL_DELAY) && !defined(NO_PAM_FAIL_DELAY)
118 pam_fail_delay(pam, 0);
121 /* PAM authentication ... */
122 retval = pam_authenticate(pam, 0);
125 if (retval == PAM_SUCCESS)
126 Log(LOG_INFO, "PAM: Authenticated \"%s\" (%s).",
127 Client_OrigUser(Client), Client_Mask(Client));
129 Log(LOG_ERR, "PAM: Error on \"%s\" (%s): %s",
130 Client_OrigUser(Client), Client_Mask(Client),
131 pam_strerror(pam, retval));
133 /* Free PAM structures */
134 if (pam_end(pam, retval) != PAM_SUCCESS)
135 Log(LOG_ERR, "PAM: Failed to release authenticator!");
137 return (retval == PAM_SUCCESS);