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Finally remove these files, which moved (by cvs backend magic) to source/auth

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source/passdb/pampass.c
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@ -1,892 +0,0 @@
/*
Unix SMB/Netbios implementation.
Version 2.2.
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"
#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, 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,
char *msg, int dbglvl,
NTSTATUS *nt_status)
{
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)
{
pstring_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;
struct chat_struct *tmp;
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, tmp);
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, 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));
nt_status = NT_STATUS_WRONG_PASSWORD;
break;
case PAM_CRED_INSUFFICIENT:
DEBUG(2, ("smb_pam_auth: PAM: Insufficient Credentials for user %s\n", user));
nt_status = NT_STATUS_INSUFFICIENT_LOGON_INFO;
break;
case PAM_AUTHINFO_UNAVAIL:
DEBUG(2, ("smb_pam_auth: PAM: Authentication Information Unavailable for user %s\n", user));
nt_status = NT_STATUS_LOGON_FAILURE;
break;
case PAM_USER_UNKNOWN:
DEBUG(2, ("smb_pam_auth: PAM: Username %s NOT known to Authentication system\n", user));
nt_status = NT_STATUS_NO_SUCH_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));
nt_status = NT_STATUS_REMOTE_SESSION_LIMIT;
break;
case PAM_ABORT:
DEBUG(0, ("smb_pam_auth: PAM: One or more PAM modules failed to load for user %s\n", user));
nt_status = NT_STATUS_LOGON_FAILURE;
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_auth: PAM: User %s Authenticated OK\n", user));
nt_status = NT_STATUS_OK;
break;
default:
DEBUG(0, ("smb_pam_auth: PAM: UNKNOWN ERROR while authenticating user %s\n", user));
nt_status = NT_STATUS_LOGON_FAILURE;
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));
nt_status = NT_STATUS_PASSWORD_EXPIRED;
break;
case PAM_ACCT_EXPIRED:
DEBUG(2, ("smb_pam_account: PAM: User %s no longer permitted to access system\n", user));
nt_status = NT_STATUS_ACCOUNT_EXPIRED;
break;
case PAM_AUTH_ERR:
DEBUG(2, ("smb_pam_account: PAM: There was an authentication error for user %s\n", user));
nt_status = NT_STATUS_LOGON_FAILURE;
break;
case PAM_PERM_DENIED:
DEBUG(0, ("smb_pam_account: PAM: User %s is NOT permitted to access system at this time\n", user));
nt_status = NT_STATUS_ACCOUNT_RESTRICTION;
break;
case PAM_USER_UNKNOWN:
DEBUG(0, ("smb_pam_account: PAM: User \"%s\" is NOT known to account management\n", user));
nt_status = NT_STATUS_NO_SUCH_USER;
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_account: PAM: Account OK for User: %s\n", user));
nt_status = NT_STATUS_OK;
break;
default:
nt_status = NT_STATUS_ACCOUNT_DISABLED;
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, 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 ));
nt_status = NT_STATUS_NO_TOKEN;
break;
case PAM_CRED_EXPIRED:
DEBUG(0, ("smb_pam_setcred: PAM: Credentials for user: \"%s\" EXPIRED!\n", user ));
nt_status = NT_STATUS_PASSWORD_EXPIRED;
break;
case PAM_USER_UNKNOWN:
DEBUG(0, ("smb_pam_setcred: PAM: User: \"%s\" is NOT known so can not set credentials!\n", user ));
nt_status = NT_STATUS_NO_SUCH_USER;
break;
case PAM_CRED_ERR:
DEBUG(0, ("smb_pam_setcred: PAM: Unknown setcredentials error - unable to set credentials for %s\n", user ));
nt_status = NT_STATUS_LOGON_FAILURE;
break;
case PAM_SUCCESS:
DEBUG(4, ("smb_pam_setcred: PAM: SetCredentials OK for User: %s\n", user));
nt_status = NT_STATUS_OK;
break;
default:
DEBUG(0, ("smb_pam_setcred: PAM: UNKNOWN PAM ERROR (%d) during SetCredentials for User: %s\n", pam_error, user));
nt_status = NT_STATUS_NO_TOKEN;
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, char *user, 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(char * user, 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 */

776
source/passdb/pass_check.c
View File

@ -1,776 +0,0 @@
/*
Unix SMB/Netbios implementation.
Version 1.9.
Password checking
Copyright (C) Andrew Tridgell 1992-1998
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 is for checking a username/password against a system
password database. The SMB encrypted password support is elsewhere */
#include "includes.h"
/* these are kept here to keep the string_combinations function simple */
static fstring this_user;
#if !defined(WITH_PAM)
static fstring this_salt;
static fstring this_crypted;
#endif
#ifdef WITH_AFS
#include <afs/stds.h>
#include <afs/kautils.h>
/*******************************************************************
check on AFS authentication
********************************************************************/
static BOOL afs_auth(char *user, char *password)
{
long password_expires = 0;
char *reason;
/* For versions of AFS prior to 3.3, this routine has few arguments, */
/* but since I can't find the old documentation... :-) */
setpag();
if (ka_UserAuthenticateGeneral
(KA_USERAUTH_VERSION + KA_USERAUTH_DOSETPAG, user, (char *)0, /* instance */
(char *)0, /* cell */
password, 0, /* lifetime, default */
&password_expires, /*days 'til it expires */
0, /* spare 2 */
&reason) == 0)
{
return (True);
}
DEBUG(1,
("AFS authentication for \"%s\" failed (%s)\n", user, reason));
return (False);
}
#endif
#ifdef WITH_DFS
#include <dce/dce_error.h>
#include <dce/sec_login.h>
/*****************************************************************
This new version of the DFS_AUTH code was donated by Karsten Muuss
<muuss@or.uni-bonn.de>. It fixes the following problems with the
old code :
- Server credentials may expire
- Client credential cache files have wrong owner
- purge_context() function is called with invalid argument
This new code was modified to ensure that on exit the uid/gid is
still root, and the original directory is restored. JRA.
******************************************************************/
sec_login_handle_t my_dce_sec_context;
int dcelogin_atmost_once = 0;
/*******************************************************************
check on a DCE/DFS authentication
********************************************************************/
static BOOL dfs_auth(char *user, char *password)
{
error_status_t err;
int err2;
int prterr;
signed32 expire_time, current_time;
boolean32 password_reset;
struct passwd *pw;
sec_passwd_rec_t passwd_rec;
sec_login_auth_src_t auth_src = sec_login_auth_src_network;
unsigned char dce_errstr[dce_c_error_string_len];
gid_t egid;
if (dcelogin_atmost_once)
return (False);
#ifdef HAVE_CRYPT
/*
* We only go for a DCE login context if the given password
* matches that stored in the local password file..
* Assumes local passwd file is kept in sync w/ DCE RGY!
*/
if (strcmp((char *)crypt(password, this_salt), this_crypted))
{
return (False);
}
#endif
sec_login_get_current_context(&my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
return (False);
}
sec_login_certify_identity(my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get current context. %s\n", dce_errstr));
return (False);
}
sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
return (False);
}
time(&current_time);
if (expire_time < (current_time + 60))
{
struct passwd *pw;
sec_passwd_rec_t *key;
sec_login_get_pwent(my_dce_sec_context,
(sec_login_passwd_t *) & pw, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
return (False);
}
sec_login_refresh_identity(my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't refresh identity. %s\n",
dce_errstr));
return (False);
}
sec_key_mgmt_get_key(rpc_c_authn_dce_secret, NULL,
(unsigned char *)pw->pw_name,
sec_c_key_version_none,
(void **)&key, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get key for %s. %s\n",
pw->pw_name, dce_errstr));
return (False);
}
sec_login_valid_and_cert_ident(my_dce_sec_context, key,
&password_reset, &auth_src,
&err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0,
("DCE can't validate and certify identity for %s. %s\n",
pw->pw_name, dce_errstr));
}
sec_key_mgmt_free_key(key, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't free key.\n", dce_errstr));
}
}
if (sec_login_setup_identity((unsigned char *)user,
sec_login_no_flags,
&my_dce_sec_context, &err) == 0)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
user, dce_errstr));
return (False);
}
sec_login_get_pwent(my_dce_sec_context,
(sec_login_passwd_t *) & pw, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
return (False);
}
sec_login_purge_context(&my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't purge context. %s\n", dce_errstr));
return (False);
}
/*
* NB. I'd like to change these to call something like change_to_user()
* instead but currently we don't have a connection
* context to become the correct user. This is already
* fairly platform specific code however, so I think
* this should be ok. I have added code to go
* back to being root on error though. JRA.
*/
egid = getegid();
set_effective_gid(pw->pw_gid);
set_effective_uid(pw->pw_uid);
if (sec_login_setup_identity((unsigned char *)user,
sec_login_no_flags,
&my_dce_sec_context, &err) == 0)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE Setup Identity for %s failed: %s\n",
user, dce_errstr));
goto err;
}
sec_login_get_pwent(my_dce_sec_context,
(sec_login_passwd_t *) & pw, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
goto err;
}
passwd_rec.version_number = sec_passwd_c_version_none;
passwd_rec.pepper = NULL;
passwd_rec.key.key_type = sec_passwd_plain;
passwd_rec.key.tagged_union.plain = (idl_char *) password;
sec_login_validate_identity(my_dce_sec_context,
&passwd_rec, &password_reset,
&auth_src, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0,
("DCE Identity Validation failed for principal %s: %s\n",
user, dce_errstr));
goto err;
}
sec_login_certify_identity(my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE certify identity failed: %s\n", dce_errstr));
goto err;
}
if (auth_src != sec_login_auth_src_network)
{
DEBUG(0, ("DCE context has no network credentials.\n"));
}
sec_login_set_context(my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0,
("DCE login failed for principal %s, cant set context: %s\n",
user, dce_errstr));
sec_login_purge_context(&my_dce_sec_context, &err);
goto err;
}
sec_login_get_pwent(my_dce_sec_context,
(sec_login_passwd_t *) & pw, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get pwent. %s\n", dce_errstr));
goto err;
}
DEBUG(0, ("DCE login succeeded for principal %s on pid %d\n",
user, sys_getpid()));
DEBUG(3, ("DCE principal: %s\n"
" uid: %d\n"
" gid: %d\n",
pw->pw_name, pw->pw_uid, pw->pw_gid));
DEBUG(3, (" info: %s\n"
" dir: %s\n"
" shell: %s\n",
pw->pw_gecos, pw->pw_dir, pw->pw_shell));
sec_login_get_expiration(my_dce_sec_context, &expire_time, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0, ("DCE can't get expiration. %s\n", dce_errstr));
goto err;
}
set_effective_uid(0);
set_effective_gid(0);
DEBUG(0,
("DCE context expires: %s", asctime(localtime(&expire_time))));
dcelogin_atmost_once = 1;
return (True);
err:
/* Go back to root, JRA. */
set_effective_uid(0);
set_effective_gid(egid);
return (False);
}
void dfs_unlogin(void)
{
error_status_t err;
int err2;
unsigned char dce_errstr[dce_c_error_string_len];
sec_login_purge_context(&my_dce_sec_context, &err);
if (err != error_status_ok)
{
dce_error_inq_text(err, dce_errstr, &err2);
DEBUG(0,
("DCE purge login context failed for server instance %d: %s\n",
sys_getpid(), dce_errstr));
}
}
#endif
#ifdef LINUX_BIGCRYPT
/****************************************************************************
an enhanced crypt for Linux to handle password longer than 8 characters
****************************************************************************/
static int linux_bigcrypt(char *password, char *salt1, char *crypted)
{
#define LINUX_PASSWORD_SEG_CHARS 8
char salt[3];
int i;
StrnCpy(salt, salt1, 2);
crypted += 2;
for (i = strlen(password); i > 0; i -= LINUX_PASSWORD_SEG_CHARS) {
char *p = crypt(password, salt) + 2;
if (strncmp(p, crypted, LINUX_PASSWORD_SEG_CHARS) != 0)
return (0);
password += LINUX_PASSWORD_SEG_CHARS;
crypted += strlen(p);
}
return (1);
}
#endif
#ifdef OSF1_ENH_SEC
/****************************************************************************
an enhanced crypt for OSF1
****************************************************************************/
static char *osf1_bigcrypt(char *password, char *salt1)
{
static char result[AUTH_MAX_PASSWD_LENGTH] = "";
char *p1;
char *p2 = password;
char salt[3];
int i;
int parts = strlen(password) / AUTH_CLEARTEXT_SEG_CHARS;
if (strlen(password) % AUTH_CLEARTEXT_SEG_CHARS)
parts++;
StrnCpy(salt, salt1, 2);
StrnCpy(result, salt1, 2);
result[2] = '\0';
for (i = 0; i < parts; i++) {
p1 = crypt(p2, salt);
strncat(result, p1 + 2,
AUTH_MAX_PASSWD_LENGTH - strlen(p1 + 2) - 1);
StrnCpy(salt, &result[2 + i * AUTH_CIPHERTEXT_SEG_CHARS], 2);
p2 += AUTH_CLEARTEXT_SEG_CHARS;
}
return (result);
}
#endif
/****************************************************************************
apply a function to upper/lower case combinations
of a string and return true if one of them returns true.
try all combinations with N uppercase letters.
offset is the first char to try and change (start with 0)
it assumes the string starts lowercased
****************************************************************************/
static NTSTATUS string_combinations2(char *s, int offset, NTSTATUS (*fn) (char *),
int N)
{
int len = strlen(s);
int i;
NTSTATUS nt_status;
#ifdef PASSWORD_LENGTH
len = MIN(len, PASSWORD_LENGTH);
#endif
if (N <= 0 || offset >= len)
return (fn(s));
for (i = offset; i < (len - (N - 1)); i++) {
char c = s[i];
if (!islower(c))
continue;
s[i] = toupper(c);
if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, i + 1, fn, N - 1),NT_STATUS_WRONG_PASSWORD)) {
return (nt_status);
}
s[i] = c;
}
return (NT_STATUS_WRONG_PASSWORD);
}
/****************************************************************************
apply a function to upper/lower case combinations
of a string and return true if one of them returns true.
try all combinations with up to N uppercase letters.
offset is the first char to try and change (start with 0)
it assumes the string starts lowercased
****************************************************************************/
static NTSTATUS string_combinations(char *s, NTSTATUS (*fn) (char *), int N)
{
int n;
NTSTATUS nt_status;
for (n = 1; n <= N; n++)
if (!NT_STATUS_EQUAL(nt_status = string_combinations2(s, 0, fn, n), NT_STATUS_WRONG_PASSWORD))
return nt_status;
return NT_STATUS_WRONG_PASSWORD;
}
/****************************************************************************
core of password checking routine
****************************************************************************/
static NTSTATUS password_check(char *password)
{
#ifdef WITH_PAM
return smb_pam_passcheck(this_user, password);
#else
BOOL ret;
#ifdef WITH_AFS
if (afs_auth(this_user, password))
return NT_STATUS_OK;
#endif /* WITH_AFS */
#ifdef WITH_DFS
if (dfs_auth(this_user, password))
return NT_STATUS_OK;
#endif /* WITH_DFS */
#ifdef OSF1_ENH_SEC
ret = (strcmp(osf1_bigcrypt(password, this_salt),
this_crypted) == 0);
if (!ret) {
DEBUG(2,
("OSF1_ENH_SEC failed. Trying normal crypt.\n"));
ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
}
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#endif /* OSF1_ENH_SEC */
#ifdef ULTRIX_AUTH
ret = (strcmp((char *)crypt16(password, this_salt), this_crypted) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#endif /* ULTRIX_AUTH */
#ifdef LINUX_BIGCRYPT
ret = (linux_bigcrypt(password, this_salt, this_crypted));
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#endif /* LINUX_BIGCRYPT */
#if defined(HAVE_BIGCRYPT) && defined(HAVE_CRYPT) && defined(USE_BOTH_CRYPT_CALLS)
/*
* Some systems have bigcrypt in the C library but might not
* actually use it for the password hashes (HPUX 10.20) is
* a noteable example. So we try bigcrypt first, followed
* by crypt.
*/
if (strcmp(bigcrypt(password, this_salt), this_crypted) == 0)
return NT_STATUS_OK;
else
ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#else /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
#ifdef HAVE_BIGCRYPT
ret = (strcmp(bigcrypt(password, this_salt), this_crypted) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#endif /* HAVE_BIGCRYPT */
#ifndef HAVE_CRYPT
DEBUG(1, ("Warning - no crypt available\n"));
return NT_STATUS_LOGON_FAILURE;
#else /* HAVE_CRYPT */
ret = (strcmp((char *)crypt(password, this_salt), this_crypted) == 0);
if (ret) {
return NT_STATUS_OK;
} else {
return NT_STATUS_WRONG_PASSWORD;
}
#endif /* HAVE_CRYPT */
#endif /* HAVE_BIGCRYPT && HAVE_CRYPT && USE_BOTH_CRYPT_CALLS */
#endif /* WITH_PAM || KRB4_AUTH || KRB5_AUTH */
}
/****************************************************************************
CHECK if a username/password is OK
the function pointer fn() points to a function to call when a successful
match is found and is used to update the encrypted password file
return NT_STATUS_OK on correct match, appropriate error otherwise
****************************************************************************/
NTSTATUS pass_check(struct passwd *pass, char *user, char *password,
int pwlen, BOOL (*fn) (char *, char *), BOOL run_cracker)
{
pstring pass2;
int level = lp_passwordlevel();
NTSTATUS nt_status;
if (password)
password[pwlen] = 0;
#if DEBUG_PASSWORD
DEBUG(100, ("checking user=[%s] pass=[%s]\n", user, password));
#endif
if (!password)
return NT_STATUS_LOGON_FAILURE;
if (((!*password) || (!pwlen)) && !lp_null_passwords())
return NT_STATUS_LOGON_FAILURE;
#if defined(WITH_PAM)
/*
* If we're using PAM we want to short-circuit all the
* checks below and dive straight into the PAM code.
*/
fstrcpy(this_user, user);
DEBUG(4, ("pass_check: Checking (PAM) password for user %s (l=%d)\n", user, pwlen));
#else /* Not using PAM or Kerebos */
DEBUG(4, ("pass_check: Checking password for user %s (l=%d)\n", user, pwlen));
if (!pass) {
DEBUG(3, ("Couldn't find user %s\n", user));
return NT_STATUS_NO_SUCH_USER;
}
#ifdef HAVE_GETSPNAM
{
struct spwd *spass;
/* many shadow systems require you to be root to get
the password, in most cases this should already be
the case when this function is called, except
perhaps for IPC password changing requests */
spass = getspnam(pass->pw_name);
if (spass && spass->sp_pwdp)
pstrcpy(pass->pw_passwd, spass->sp_pwdp);
}
#elif defined(IA_UINFO)
{
/* Need to get password with SVR4.2's ia_ functions
instead of get{sp,pw}ent functions. Required by
UnixWare 2.x, tested on version
2.1. (tangent@cyberport.com) */
uinfo_t uinfo;
if (ia_openinfo(pass->pw_name, &uinfo) != -1)
ia_get_logpwd(uinfo, &(pass->pw_passwd));
}
#endif
#ifdef HAVE_GETPRPWNAM
{
struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
if (pr_pw && pr_pw->ufld.fd_encrypt)
pstrcpy(pass->pw_passwd, pr_pw->ufld.fd_encrypt);
}
#endif
#ifdef OSF1_ENH_SEC
{
struct pr_passwd *mypasswd;
DEBUG(5, ("Checking password for user %s in OSF1_ENH_SEC\n",
user));
mypasswd = getprpwnam(user);
if (mypasswd) {
fstrcpy(pass->pw_name, mypasswd->ufld.fd_name);
fstrcpy(pass->pw_passwd, mypasswd->ufld.fd_encrypt);
} else {
DEBUG(5,
("OSF1_ENH_SEC: No entry for user %s in protected database !\n",
user));
}
}
#endif
#ifdef ULTRIX_AUTH
{
AUTHORIZATION *ap = getauthuid(pass->pw_uid);
if (ap) {
fstrcpy(pass->pw_passwd, ap->a_password);
endauthent();
}
}
#endif
/* extract relevant info */
fstrcpy(this_salt, pass->pw_passwd);
#if defined(HAVE_TRUNCATED_SALT)
/* crypt on some platforms (HPUX in particular)
won't work with more than 2 salt characters. */
this_salt[2] = 0;
#endif
fstrcpy(this_crypted, pass->pw_passwd);
if (!*this_crypted) {
if (!lp_null_passwords()) {
DEBUG(2, ("Disallowing %s with null password\n",
this_user));
return NT_STATUS_LOGON_FAILURE;
}
if (!*password) {
DEBUG(3,
("Allowing access to %s with null password\n",
this_user));
return NT_STATUS_OK;
}
}
#endif /* defined(WITH_PAM) */
/* try it as it came to us */
nt_status = password_check(password);
if NT_STATUS_IS_OK(nt_status) {
if (fn) {
fn(user, password);
}
return (nt_status);
} else if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD)) {
/* No point continuing if its not the password thats to blame (ie PAM disabled). */
return (nt_status);
}
if (!run_cracker) {
return (nt_status);
}
/* if the password was given to us with mixed case then we don't
* need to proceed as we know it hasn't been case modified by the
* client */
if (strhasupper(password) && strhaslower(password)) {
return nt_status;
}
/* make a copy of it */
StrnCpy(pass2, password, sizeof(pstring) - 1);
/* try all lowercase if it's currently all uppercase */
if (strhasupper(password)) {
strlower(password);
if NT_STATUS_IS_OK(nt_status = password_check(password)) {
if (fn)
fn(user, password);
return (nt_status);
}
}
/* give up? */
if (level < 1) {
/* restore it */
fstrcpy(password, pass2);
return NT_STATUS_WRONG_PASSWORD;
}
/* last chance - all combinations of up to level chars upper! */
strlower(password);
if NT_STATUS_IS_OK(nt_status = string_combinations(password, password_check, level)) {
if (fn)
fn(user, password);
return nt_status;
}
/* restore it */
fstrcpy(password, pass2);
return NT_STATUS_WRONG_PASSWORD;
}