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samba-mirror/source4/auth/pampass.c
Andrew Tridgell 16309de71d * the RPC-ECHO pipe now works in smbd, as long as the data sizes
don't cause fragmented pdus (I'll add fragments shortly)

 * change data_blob_talloc() to not zero memory when the 2nd argument
   is NULL. The zeroing just masks bugs, and can't even allow a DOS
   attack

 * modified pidl to ensure that [ref] arguments to the out side of
   functions are allocated when parsing the in side. This allows rpc
   backends to assume that [ref] variables are all setup. Doesn't work
   correctly for [ref] arrays yet

 * changed DLIST_ADD_END() to take the type instead of a tmp
   variable. This means you don't need to declare a silly tmp variable in
   the caller
(This used to be commit 46e0a35819)
2003-12-12 03:59:09 +00:00

875 lines
24 KiB
C

/*
Unix SMB/CIFS implementation.
PAM Password checking
Copyright (C) Andrew Tridgell 1992-2001
Copyright (C) John H Terpsta 1999-2001
Copyright (C) Andrew Bartlett 2001
Copyright (C) Jeremy Allison 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* This module provides PAM based functions for validation of
* username/password pairs, account managment, session and access control.
* Note: SMB password checking is done in smbpass.c
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
#ifdef WITH_PAM
/*******************************************************************
* Handle PAM authentication
* - Access, Authentication, Session, Password
* Note: See PAM Documentation and refer to local system PAM implementation
* which determines what actions/limitations/allowances become affected.
*********************************************************************/
#include <security/pam_appl.h>
/*
* Structure used to communicate between the conversation function
* and the server_login/change password functions.
*/
struct smb_pam_userdata {
const char *PAM_username;
const char *PAM_password;
const char *PAM_newpassword;
};
typedef int (*smb_pam_conv_fn)(int, const struct pam_message **, struct pam_response **, void *appdata_ptr);
/*
* Macros to help make life easy
*/
#define COPY_STRING(s) (s) ? strdup(s) : NULL
/*******************************************************************
PAM error handler.
*********************************************************************/
static BOOL smb_pam_error_handler(pam_handle_t *pamh, int pam_error, const char *msg, int dbglvl)
{
if( pam_error != PAM_SUCCESS) {
DEBUG(dbglvl, ("smb_pam_error_handler: PAM: %s : %s\n",
msg, pam_strerror(pamh, pam_error)));
return False;
}
return True;
}
/*******************************************************************
This function is a sanity check, to make sure that we NEVER report
failure as sucess.
*********************************************************************/
static BOOL smb_pam_nt_status_error_handler(pam_handle_t *pamh, int pam_error,
const char *msg, int dbglvl,
NTSTATUS *nt_status)
{
*nt_status = pam_to_nt_status(pam_error);
if (smb_pam_error_handler(pamh, pam_error, msg, dbglvl))
return True;
if (NT_STATUS_IS_OK(*nt_status)) {
/* Complain LOUDLY */
DEBUG(0, ("smb_pam_nt_status_error_handler: PAM: BUG: PAM and NT_STATUS \
error MISMATCH, forcing to NT_STATUS_LOGON_FAILURE"));
*nt_status = NT_STATUS_LOGON_FAILURE;
}
return False;
}
/*
* PAM conversation function
* Here we assume (for now, at least) that echo on means login name, and
* echo off means password.
*/
static int smb_pam_conv(int num_msg,
const struct pam_message **msg,
struct pam_response **resp,
void *appdata_ptr)
{
int replies = 0;
struct pam_response *reply = NULL;
struct smb_pam_userdata *udp = (struct smb_pam_userdata *)appdata_ptr;
*resp = NULL;
if (num_msg <= 0)
return PAM_CONV_ERR;
/*
* Apparantly HPUX has a buggy PAM that doesn't support the
* appdata_ptr. Fail if this is the case. JRA.
*/
if (udp == NULL) {
DEBUG(0,("smb_pam_conv: PAM on this system is broken - appdata_ptr == NULL !\n"));
return PAM_CONV_ERR;
}
reply = malloc(sizeof(struct pam_response) * num_msg);
if (!reply)
return PAM_CONV_ERR;
memset(reply, '\0', sizeof(struct pam_response) * num_msg);
for (replies = 0; replies < num_msg; replies++) {
switch (msg[replies]->msg_style) {
case PAM_PROMPT_ECHO_ON:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = COPY_STRING(udp->PAM_username);
/* PAM frees resp */
break;
case PAM_PROMPT_ECHO_OFF:
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = COPY_STRING(udp->PAM_password);
/* PAM frees resp */
break;
case PAM_TEXT_INFO:
/* fall through */
case PAM_ERROR_MSG:
/* ignore it... */
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = NULL;
break;
default:
/* Must be an error of some sort... */
SAFE_FREE(reply);
return PAM_CONV_ERR;
}
}
if (reply)
*resp = reply;
return PAM_SUCCESS;
}
/*
* PAM password change conversation function
* Here we assume (for now, at least) that echo on means login name, and
* echo off means password.
*/
static void special_char_sub(char *buf)
{
all_string_sub(buf, "\\n", "", 0);
all_string_sub(buf, "\\r", "", 0);
all_string_sub(buf, "\\s", " ", 0);
all_string_sub(buf, "\\t", "\t", 0);
}
static void pwd_sub(char *buf, const char *username, const char *oldpass, const char *newpass)
{
fstring_sub(buf, "%u", username);
all_string_sub(buf, "%o", oldpass, sizeof(fstring));
all_string_sub(buf, "%n", newpass, sizeof(fstring));
}
struct chat_struct {
struct chat_struct *next, *prev;
fstring prompt;
fstring reply;
};
/**************************************************************
Create a linked list containing chat data.
***************************************************************/
static struct chat_struct *make_pw_chat(char *p)
{
fstring prompt;
fstring reply;
struct chat_struct *list = NULL;
struct chat_struct *t;
while (1) {
t = (struct chat_struct *)malloc(sizeof(*t));
if (!t) {
DEBUG(0,("make_pw_chat: malloc failed!\n"));
return NULL;
}
ZERO_STRUCTP(t);
DLIST_ADD_END(list, t, struct chat_struct *);
if (!next_token(&p, prompt, NULL, sizeof(fstring)))
break;
if (strequal(prompt,"."))
fstrcpy(prompt,"*");
special_char_sub(prompt);
fstrcpy(t->prompt, prompt);
strlower(t->prompt);
trim_string(t->prompt, " ", " ");
if (!next_token(&p, reply, NULL, sizeof(fstring)))
break;
if (strequal(reply,"."))
fstrcpy(reply,"");
special_char_sub(reply);
fstrcpy(t->reply, reply);
strlower(t->reply);
trim_string(t->reply, " ", " ");
}
return list;
}
static void free_pw_chat(struct chat_struct *list)
{
while (list) {
struct chat_struct *old_head = list;
DLIST_REMOVE(list, list);
SAFE_FREE(old_head);
}
}
static int smb_pam_passchange_conv(int num_msg,
const struct pam_message **msg,
struct pam_response **resp,
void *appdata_ptr)
{
int replies = 0;
struct pam_response *reply = NULL;
fstring current_prompt;
fstring current_reply;
struct smb_pam_userdata *udp = (struct smb_pam_userdata *)appdata_ptr;
struct chat_struct *pw_chat= make_pw_chat(lp_passwd_chat());
struct chat_struct *t;
BOOL found;
*resp = NULL;
DEBUG(10,("smb_pam_passchange_conv: starting converstation for %d messages\n", num_msg));
if (num_msg <= 0)
return PAM_CONV_ERR;
if (pw_chat == NULL)
return PAM_CONV_ERR;
/*
* Apparantly HPUX has a buggy PAM that doesn't support the
* appdata_ptr. Fail if this is the case. JRA.
*/
if (udp == NULL) {
DEBUG(0,("smb_pam_passchange_conv: PAM on this system is broken - appdata_ptr == NULL !\n"));
free_pw_chat(pw_chat);
return PAM_CONV_ERR;
}
reply = malloc(sizeof(struct pam_response) * num_msg);
if (!reply) {
DEBUG(0,("smb_pam_passchange_conv: malloc for reply failed!\n"));
free_pw_chat(pw_chat);
return PAM_CONV_ERR;
}
for (replies = 0; replies < num_msg; replies++) {
found = False;
DEBUG(10,("smb_pam_passchange_conv: Processing message %d\n", replies));
switch (msg[replies]->msg_style) {
case PAM_PROMPT_ECHO_ON:
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: PAM said: %s\n", msg[replies]->msg));
fstrcpy(current_prompt, msg[replies]->msg);
trim_string(current_prompt, " ", " ");
for (t=pw_chat; t; t=t->next) {
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: trying to match |%s| to |%s|\n",
t->prompt, current_prompt ));
if (unix_wild_match(t->prompt, current_prompt) == 0) {
fstrcpy(current_reply, t->reply);
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: We sent: %s\n", current_reply));
pwd_sub(current_reply, udp->PAM_username, udp->PAM_password, udp->PAM_newpassword);
#ifdef DEBUG_PASSWORD
DEBUG(100,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_ON: We actualy sent: %s\n", current_reply));
#endif
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = COPY_STRING(current_reply);
found = True;
break;
}
}
/* PAM frees resp */
if (!found) {
DEBUG(3,("smb_pam_passchange_conv: Could not find reply for PAM prompt: %s\n",msg[replies]->msg));
free_pw_chat(pw_chat);
SAFE_FREE(reply);
return PAM_CONV_ERR;
}
break;
case PAM_PROMPT_ECHO_OFF:
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: PAM said: %s\n", msg[replies]->msg));
fstrcpy(current_prompt, msg[replies]->msg);
trim_string(current_prompt, " ", " ");
for (t=pw_chat; t; t=t->next) {
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: trying to match |%s| to |%s|\n",
t->prompt, current_prompt ));
if (unix_wild_match(t->prompt, current_prompt) == 0) {
fstrcpy(current_reply, t->reply);
DEBUG(10,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: We sent: %s\n", current_reply));
pwd_sub(current_reply, udp->PAM_username, udp->PAM_password, udp->PAM_newpassword);
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = COPY_STRING(current_reply);
#ifdef DEBUG_PASSWORD
DEBUG(100,("smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: We actualy sent: %s\n", current_reply));
#endif
found = True;
break;
}
}
/* PAM frees resp */
if (!found) {
DEBUG(3,("smb_pam_passchange_conv: Could not find reply for PAM prompt: %s\n",msg[replies]->msg));
free_pw_chat(pw_chat);
SAFE_FREE(reply);
return PAM_CONV_ERR;
}
break;
case PAM_TEXT_INFO:
/* fall through */
case PAM_ERROR_MSG:
/* ignore it... */
reply[replies].resp_retcode = PAM_SUCCESS;
reply[replies].resp = NULL;
break;
default:
/* Must be an error of some sort... */
free_pw_chat(pw_chat);
SAFE_FREE(reply);
return PAM_CONV_ERR;
}
}
free_pw_chat(pw_chat);
if (reply)
*resp = reply;
return PAM_SUCCESS;
}
/***************************************************************************
Free up a malloced pam_conv struct.
****************************************************************************/
static void smb_free_pam_conv(struct pam_conv *pconv)
{
if (pconv)
SAFE_FREE(pconv->appdata_ptr);
SAFE_FREE(pconv);
}
/***************************************************************************
Allocate a pam_conv struct.
****************************************************************************/
static struct pam_conv *smb_setup_pam_conv(smb_pam_conv_fn smb_pam_conv_fnptr, const char *user,
const char *passwd, const char *newpass)
{
struct pam_conv *pconv = (struct pam_conv *)malloc(sizeof(struct pam_conv));
struct smb_pam_userdata *udp = (struct smb_pam_userdata *)malloc(sizeof(struct smb_pam_userdata));
if (pconv == NULL || udp == NULL) {
SAFE_FREE(pconv);
SAFE_FREE(udp);
return NULL;
}
udp->PAM_username = user;
udp->PAM_password = passwd;
udp->PAM_newpassword = newpass;
pconv->conv = smb_pam_conv_fnptr;
pconv->appdata_ptr = (void *)udp;
return pconv;
}
/*
* PAM Closing out cleanup handler
*/
static BOOL smb_pam_end(pam_handle_t *pamh, struct pam_conv *smb_pam_conv_ptr)
{
int pam_error;
smb_free_pam_conv(smb_pam_conv_ptr);
if( pamh != NULL ) {
pam_error = pam_end(pamh, 0);
if(smb_pam_error_handler(pamh, pam_error, "End Cleanup Failed", 2) == True) {
DEBUG(4, ("smb_pam_end: PAM: PAM_END OK.\n"));
return True;
}
}
DEBUG(2,("smb_pam_end: PAM: not initialised"));
return False;
}
/*
* Start PAM authentication for specified account
*/
static BOOL smb_pam_start(pam_handle_t **pamh, const char *user, const char *rhost, struct pam_conv *pconv)
{
int pam_error;
const char *our_rhost;
*pamh = (pam_handle_t *)NULL;
DEBUG(4,("smb_pam_start: PAM: Init user: %s\n", user));
pam_error = pam_start("samba", user, pconv, pamh);
if( !smb_pam_error_handler(*pamh, pam_error, "Init Failed", 0)) {
*pamh = (pam_handle_t *)NULL;
return False;
}
if (rhost == NULL) {
our_rhost = client_name();
if (strequal(rhost,"UNKNOWN"))
our_rhost = client_addr();
} else {
our_rhost = rhost;
}
#ifdef PAM_RHOST
DEBUG(4,("smb_pam_start: PAM: setting rhost to: %s\n", our_rhost));
pam_error = pam_set_item(*pamh, PAM_RHOST, our_rhost);
if(!smb_pam_error_handler(*pamh, pam_error, "set rhost failed", 0)) {
smb_pam_end(*pamh, pconv);
*pamh = (pam_handle_t *)NULL;
return False;
}
#endif
#ifdef PAM_TTY
DEBUG(4,("smb_pam_start: PAM: setting tty\n"));
pam_error = pam_set_item(*pamh, PAM_TTY, "samba");
if (!smb_pam_error_handler(*pamh, pam_error, "set tty failed", 0)) {
smb_pam_end(*pamh, pconv);
*pamh = (pam_handle_t *)NULL;
return False;
}
#endif
DEBUG(4,("smb_pam_start: PAM: Init passed for user: %s\n", user));
return True;
}
/*
* PAM Authentication Handler
*/
static NTSTATUS smb_pam_auth(pam_handle_t *pamh, const char *user)
{
int pam_error;
NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
/*
* To enable debugging set in /etc/pam.d/samba:
* auth required /lib/security/pam_pwdb.so nullok shadow audit
*/
DEBUG(4,("smb_pam_auth: PAM: Authenticate User: %s\n", user));
pam_error = pam_authenticate(pamh, PAM_SILENT | lp_null_passwords() ? 0 : PAM_DISALLOW_NULL_AUTHTOK);
switch( pam_error ){
case PAM_AUTH_ERR:
DEBUG(2, ("smb_pam_auth: PAM: Athentication Error for user %s\n", user));
break;
case PAM_CRED_INSUFFICIENT:
DEBUG(2, ("smb_pam_auth: PAM: Insufficient Credentials for user %s\n", user));
break;
case PAM_AUTHINFO_UNAVAIL:
DEBUG(2, ("smb_pam_auth: PAM: Authentication Information Unavailable for user %s\n", user));
break;
case PAM_USER_UNKNOWN:
DEBUG(2, ("smb_pam_auth: PAM: Username %s NOT known to Authentication system\n", user));
break;
case PAM_MAXTRIES:
DEBUG(2, ("smb_pam_auth: PAM: One or more authentication modules reports user limit for user %s exceeeded\n", user));
break;
case PAM_ABORT:
DEBUG(0, ("smb_pam_auth: PAM: One or more PAM modules failed to load for user %s\n", user));
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_auth: PAM: User %s Authenticated OK\n", user));
break;
default:
DEBUG(0, ("smb_pam_auth: PAM: UNKNOWN ERROR while authenticating user %s\n", user));
break;
}
smb_pam_nt_status_error_handler(pamh, pam_error, "Authentication Failure", 2, &nt_status);
return nt_status;
}
/*
* PAM Account Handler
*/
static NTSTATUS smb_pam_account(pam_handle_t *pamh, const char * user)
{
int pam_error;
NTSTATUS nt_status = NT_STATUS_ACCOUNT_DISABLED;
DEBUG(4,("smb_pam_account: PAM: Account Management for User: %s\n", user));
pam_error = pam_acct_mgmt(pamh, PAM_SILENT); /* Is user account enabled? */
switch( pam_error ) {
case PAM_AUTHTOK_EXPIRED:
DEBUG(2, ("smb_pam_account: PAM: User %s is valid but password is expired\n", user));
break;
case PAM_ACCT_EXPIRED:
DEBUG(2, ("smb_pam_account: PAM: User %s no longer permitted to access system\n", user));
break;
case PAM_AUTH_ERR:
DEBUG(2, ("smb_pam_account: PAM: There was an authentication error for user %s\n", user));
break;
case PAM_PERM_DENIED:
DEBUG(0, ("smb_pam_account: PAM: User %s is NOT permitted to access system at this time\n", user));
break;
case PAM_USER_UNKNOWN:
DEBUG(0, ("smb_pam_account: PAM: User \"%s\" is NOT known to account management\n", user));
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_account: PAM: Account OK for User: %s\n", user));
break;
default:
DEBUG(0, ("smb_pam_account: PAM: UNKNOWN PAM ERROR (%d) during Account Management for User: %s\n", pam_error, user));
break;
}
smb_pam_nt_status_error_handler(pamh, pam_error, "Account Check Failed", 2, &nt_status);
return nt_status;
}
/*
* PAM Credential Setting
*/
static NTSTATUS smb_pam_setcred(pam_handle_t *pamh, const char * user)
{
int pam_error;
NTSTATUS nt_status = NT_STATUS_NO_TOKEN;
/*
* This will allow samba to aquire a kerberos token. And, when
* exporting an AFS cell, be able to /write/ to this cell.
*/
DEBUG(4,("PAM: Account Management SetCredentials for User: %s\n", user));
pam_error = pam_setcred(pamh, (PAM_ESTABLISH_CRED|PAM_SILENT));
switch( pam_error ) {
case PAM_CRED_UNAVAIL:
DEBUG(0, ("smb_pam_setcred: PAM: Credentials not found for user:%s\n", user ));
break;
case PAM_CRED_EXPIRED:
DEBUG(0, ("smb_pam_setcred: PAM: Credentials for user: \"%s\" EXPIRED!\n", user ));
break;
case PAM_USER_UNKNOWN:
DEBUG(0, ("smb_pam_setcred: PAM: User: \"%s\" is NOT known so can not set credentials!\n", user ));
break;
case PAM_CRED_ERR:
DEBUG(0, ("smb_pam_setcred: PAM: Unknown setcredentials error - unable to set credentials for %s\n", user ));
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_setcred: PAM: SetCredentials OK for User: %s\n", user));
break;
default:
DEBUG(0, ("smb_pam_setcred: PAM: UNKNOWN PAM ERROR (%d) during SetCredentials for User: %s\n", pam_error, user));
break;
}
smb_pam_nt_status_error_handler(pamh, pam_error, "Set Credential Failure", 2, &nt_status);
return nt_status;
}
/*
* PAM Internal Session Handler
*/
static BOOL smb_internal_pam_session(pam_handle_t *pamh, const char *user, const char *tty, BOOL flag)
{
int pam_error;
#ifdef PAM_TTY
DEBUG(4,("smb_internal_pam_session: PAM: tty set to: %s\n", tty));
pam_error = pam_set_item(pamh, PAM_TTY, tty);
if (!smb_pam_error_handler(pamh, pam_error, "set tty failed", 0))
return False;
#endif
if (flag) {
pam_error = pam_open_session(pamh, PAM_SILENT);
if (!smb_pam_error_handler(pamh, pam_error, "session setup failed", 0))
return False;
} else {
pam_setcred(pamh, (PAM_DELETE_CRED|PAM_SILENT)); /* We don't care if this fails */
pam_error = pam_close_session(pamh, PAM_SILENT); /* This will probably pick up the error anyway */
if (!smb_pam_error_handler(pamh, pam_error, "session close failed", 0))
return False;
}
return (True);
}
/*
* Internal PAM Password Changer.
*/
static BOOL smb_pam_chauthtok(pam_handle_t *pamh, const char * user)
{
int pam_error;
DEBUG(4,("smb_pam_chauthtok: PAM: Password Change for User: %s\n", user));
pam_error = pam_chauthtok(pamh, PAM_SILENT); /* Change Password */
switch( pam_error ) {
case PAM_AUTHTOK_ERR:
DEBUG(2, ("PAM: unable to obtain the new authentication token - is password to weak?\n"));
break;
/* This doesn't seem to be defined on Solaris. JRA */
#ifdef PAM_AUTHTOK_RECOVER_ERR
case PAM_AUTHTOK_RECOVER_ERR:
DEBUG(2, ("PAM: unable to obtain the old authentication token - was the old password wrong?.\n"));
break;
#endif
case PAM_AUTHTOK_LOCK_BUSY:
DEBUG(2, ("PAM: unable to change the authentication token since it is currently locked.\n"));
break;
case PAM_AUTHTOK_DISABLE_AGING:
DEBUG(2, ("PAM: Authentication token aging has been disabled.\n"));
break;
case PAM_PERM_DENIED:
DEBUG(0, ("PAM: Permission denied.\n"));
break;
case PAM_TRY_AGAIN:
DEBUG(0, ("PAM: Could not update all authentication token(s). No authentication tokens were updated.\n"));
break;
case PAM_USER_UNKNOWN:
DEBUG(0, ("PAM: User not known to PAM\n"));
break;
case PAM_SUCCESS:
DEBUG(4, ("PAM: Account OK for User: %s\n", user));
break;
default:
DEBUG(0, ("PAM: UNKNOWN PAM ERROR (%d) for User: %s\n", pam_error, user));
}
if(!smb_pam_error_handler(pamh, pam_error, "Password Change Failed", 2)) {
return False;
}
/* If this point is reached, the password has changed. */
return True;
}
/*
* PAM Externally accessible Session handler
*/
BOOL smb_pam_claim_session(char *user, char *tty, char *rhost)
{
pam_handle_t *pamh = NULL;
struct pam_conv *pconv = NULL;
/* Ignore PAM if told to. */
if (!lp_obey_pam_restrictions())
return True;
if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
return False;
if (!smb_pam_start(&pamh, user, rhost, pconv))
return False;
if (!smb_internal_pam_session(pamh, user, tty, True)) {
smb_pam_end(pamh, pconv);
return False;
}
return smb_pam_end(pamh, pconv);
}
/*
* PAM Externally accessible Session handler
*/
BOOL smb_pam_close_session(char *user, char *tty, char *rhost)
{
pam_handle_t *pamh = NULL;
struct pam_conv *pconv = NULL;
/* Ignore PAM if told to. */
if (!lp_obey_pam_restrictions())
return True;
if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
return False;
if (!smb_pam_start(&pamh, user, rhost, pconv))
return False;
if (!smb_internal_pam_session(pamh, user, tty, False)) {
smb_pam_end(pamh, pconv);
return False;
}
return smb_pam_end(pamh, pconv);
}
/*
* PAM Externally accessible Account handler
*/
NTSTATUS smb_pam_accountcheck(const char * user)
{
NTSTATUS nt_status = NT_STATUS_ACCOUNT_DISABLED;
pam_handle_t *pamh = NULL;
struct pam_conv *pconv = NULL;
/* Ignore PAM if told to. */
if (!lp_obey_pam_restrictions())
return NT_STATUS_OK;
if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, NULL, NULL)) == NULL)
return NT_STATUS_NO_MEMORY;
if (!smb_pam_start(&pamh, user, NULL, pconv))
return NT_STATUS_ACCOUNT_DISABLED;
if (!NT_STATUS_IS_OK(nt_status = smb_pam_account(pamh, user)))
DEBUG(0, ("smb_pam_accountcheck: PAM: Account Validation Failed - Rejecting User %s!\n", user));
smb_pam_end(pamh, pconv);
return nt_status;
}
/*
* PAM Password Validation Suite
*/
NTSTATUS smb_pam_passcheck(const char * user, const char * password)
{
pam_handle_t *pamh = NULL;
NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
struct pam_conv *pconv = NULL;
/*
* Note we can't ignore PAM here as this is the only
* way of doing auths on plaintext passwords when
* compiled --with-pam.
*/
if ((pconv = smb_setup_pam_conv(smb_pam_conv, user, password, NULL)) == NULL)
return NT_STATUS_LOGON_FAILURE;
if (!smb_pam_start(&pamh, user, NULL, pconv))
return NT_STATUS_LOGON_FAILURE;
if (!NT_STATUS_IS_OK(nt_status = smb_pam_auth(pamh, user))) {
DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_auth failed - Rejecting User %s !\n", user));
smb_pam_end(pamh, pconv);
return nt_status;
}
if (!NT_STATUS_IS_OK(nt_status = smb_pam_account(pamh, user))) {
DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_account failed - Rejecting User %s !\n", user));
smb_pam_end(pamh, pconv);
return nt_status;
}
if (!NT_STATUS_IS_OK(nt_status = smb_pam_setcred(pamh, user))) {
DEBUG(0, ("smb_pam_passcheck: PAM: smb_pam_setcred failed - Rejecting User %s !\n", user));
smb_pam_end(pamh, pconv);
return nt_status;
}
smb_pam_end(pamh, pconv);
return nt_status;
}
/*
* PAM Password Change Suite
*/
BOOL smb_pam_passchange(const char * user, const char * oldpassword, const char * newpassword)
{
/* Appropriate quantities of root should be obtained BEFORE calling this function */
struct pam_conv *pconv = NULL;
pam_handle_t *pamh = NULL;
if ((pconv = smb_setup_pam_conv(smb_pam_passchange_conv, user, oldpassword, newpassword)) == NULL)
return False;
if(!smb_pam_start(&pamh, user, NULL, pconv))
return False;
if (!smb_pam_chauthtok(pamh, user)) {
DEBUG(0, ("smb_pam_passchange: PAM: Password Change Failed for user %s!\n", user));
smb_pam_end(pamh, pconv);
return False;
}
return smb_pam_end(pamh, pconv);
}
#else
/* If PAM not used, no PAM restrictions on accounts. */
NTSTATUS smb_pam_accountcheck(const char * user)
{
return NT_STATUS_OK;
}
/* If PAM not used, also no PAM restrictions on sessions. */
BOOL smb_pam_claim_session(char *user, char *tty, char *rhost)
{
return True;
}
/* If PAM not used, also no PAM restrictions on sessions. */
BOOL smb_pam_close_session(char *in_user, char *tty, char *rhost)
{
return True;
}
#endif /* WITH_PAM */