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|
/*
Unix SMB/Netbios implementation.
Version 1.9.
Password and authentication handling
Copyright (C) Jeremy Allison 1996-1998
Copyright (C) Luke Kenneth Casson Leighton 1996-1998
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.
*/
#include "includes.h"
#include "nterr.h"
extern int DEBUGLEVEL;
/*
* This is set on startup - it defines the SID for this
* machine.
*/
DOM_SID global_machine_sid;
/*
* NOTE. All these functions are abstracted into a structure
* that points to the correct function for the selected database. JRA.
*
* NOTE. for the get/mod/add functions, there are two sets of functions.
* one supports struct sam_passwd, the other supports struct smb_passwd.
* for speed optimisation it is best to support both these sets.
*
* it is, however, optional to support one set but not the other: there
* is conversion-capability built in to passdb.c, and run-time error
* detection for when neither are supported.
*
* password database writers are recommended to implement the sam_passwd
* functions in a first pass, as struct sam_passwd contains more
* information, needed by the NT Domain support. lkcl.
*
*/
static struct passdb_ops *pdb_ops;
/*
* Functions that return/manipulate a struct smb_passwd.
*/
/************************************************************************
Utility function to search smb passwd by uid. use this if your database
does not have search facilities.
*************************************************************************/
struct smb_passwd *iterate_getsmbpwuid(uid_t smb_userid)
{
struct smb_passwd *pwd = NULL;
void *fp = NULL;
DEBUG(10, ("iterate_getsmbpwuid: search by smb_userid: %x\n", smb_userid));
/* Open the smb password database - not for update. */
fp = startsmbpwent(False);
if (fp == NULL)
{
DEBUG(0, ("iterate_getsmbpwuid: unable to open smb password database.\n"));
return NULL;
}
while ((pwd = getsmbpwent(fp)) != NULL && pwd->smb_userid != smb_userid)
;
if (pwd != NULL)
{
DEBUG(10, ("iterate_getsmbpwuid: found by smb_userid: %x\n", smb_userid));
}
endsmbpwent(fp);
return pwd;
}
/************************************************************************
Utility function to search smb passwd by name. use this if your database
does not have search facilities.
*************************************************************************/
struct smb_passwd *iterate_getsmbpwnam(char *name)
{
struct smb_passwd *pwd = NULL;
void *fp = NULL;
DEBUG(10, ("iterate_getsmbpwnam: search by name: %s\n", name));
/* Open the sam password file - not for update. */
fp = startsmbpwent(False);
if (fp == NULL)
{
DEBUG(0, ("iterate_getsmbpwnam: unable to open smb password database.\n"));
return NULL;
}
while ((pwd = getsmbpwent(fp)) != NULL && !strequal(pwd->smb_name, name))
;
if (pwd != NULL)
{
DEBUG(10, ("iterate_getsmbpwnam: found by name: %s\n", name));
}
endsmbpwent(fp);
return pwd;
}
/***************************************************************
Initialize the password db operations.
***************************************************************/
BOOL initialize_password_db(void)
{
if (pdb_ops)
{
return True;
}
#ifdef USE_NISPLUS_DB
pdb_ops = nisplus_initialize_password_db();
#endif /* USE_NISPLUS_DB */
#ifdef USE_LDAP_DB
pdb_ops = ldap_initialize_password_db();
#endif /* USE_LDAP_DB */
#ifdef USE_SMBPASS_DB
pdb_ops = file_initialize_password_db();
#endif /* USE_SMBPASS_DB */
return (pdb_ops != NULL);
}
/***************************************************************
Start to enumerate the smb or sam passwd list. Returns a void pointer
to ensure no modification outside this module.
Note that currently it is being assumed that a pointer returned
from this function may be used to enumerate struct sam_passwd
entries as well as struct smb_passwd entries. This may need
to change. JRA.
****************************************************************/
void *startsmbpwent(BOOL update)
{
return pdb_ops->startsmbpwent(update);
}
/***************************************************************
End enumeration of the smb or sam passwd list.
Note that currently it is being assumed that a pointer returned
from this function may be used to enumerate struct sam_passwd
entries as well as struct smb_passwd entries. This may need
to change. JRA.
****************************************************************/
void endsmbpwent(void *vp)
{
pdb_ops->endsmbpwent(vp);
}
/*************************************************************************
Routine to return the next entry in the smb passwd list.
*************************************************************************/
struct smb_passwd *getsmbpwent(void *vp)
{
if (pdb_ops->getsmbpwent == NULL && pdb_ops->getsam21pwent == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsmbpwent: getsmbpwent() and getsam21pwent() not supported!\n"));
return NULL;
}
if (pdb_ops->getsmbpwent != NULL)
{
return pdb_ops->getsmbpwent(vp);
}
return pdb_sam_to_smb(pdb_ops->getsam21pwent(vp));
}
/*************************************************************************
Return the current position in the smb passwd list as an unsigned long.
This must be treated as an opaque token.
Note that currently it is being assumed that a pointer returned
from this function may be used to enumerate struct sam_passwd
entries as well as struct smb_passwd entries. This may need
to change. JRA.
*************************************************************************/
unsigned long getsmbpwpos(void *vp)
{
return pdb_ops->getsmbpwpos(vp);
}
/*************************************************************************
Set the current position in the smb passwd list from unsigned long.
This must be treated as an opaque token.
Note that currently it is being assumed that a pointer returned
from this function may be used to enumerate struct sam_passwd
entries as well as struct smb_passwd entries. This may need
to change. JRA.
*************************************************************************/
BOOL setsmbpwpos(void *vp, unsigned long tok)
{
return pdb_ops->setsmbpwpos(vp, tok);
}
/************************************************************************
Routine to add an entry to the smb passwd file.
*************************************************************************/
BOOL add_smbpwd_entry(struct smb_passwd *newpwd)
{
if (pdb_ops->add_smbpwd_entry == NULL && pdb_ops->add_sam21pwd_entry == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("add_smbpwd_entry: add_smbpwd_entry() and add_sam21pwd_entry() not supported!\n"));
return False;
}
if (pdb_ops->add_smbpwd_entry != NULL)
{
return pdb_ops->add_smbpwd_entry(newpwd);
}
return pdb_ops->add_sam21pwd_entry(pdb_smb_to_sam(newpwd));
}
/************************************************************************
Routine to search the smb passwd file for an entry matching the username.
and then modify its password entry. We can't use the startsampwent()/
getsampwent()/endsampwent() interfaces here as we depend on looking
in the actual file to decide how much room we have to write data.
override = False, normal
override = True, override XXXXXXXX'd out password or NO PASS
************************************************************************/
BOOL mod_smbpwd_entry(struct smb_passwd* pwd, BOOL override)
{
if (pdb_ops->mod_smbpwd_entry == NULL && pdb_ops->mod_sam21pwd_entry == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("mod_smbpwd_entry: mod_smbpwd_entry() and mod_sam21pwd_entry() not supported!\n"));
return False;
}
if (pdb_ops->mod_smbpwd_entry != NULL)
{
return pdb_ops->mod_smbpwd_entry(pwd, override);
}
return pdb_ops->mod_sam21pwd_entry(pdb_smb_to_sam(pwd), override);
}
/************************************************************************
Routine to search smb passwd by name.
*************************************************************************/
struct smb_passwd *getsmbpwnam(char *name)
{
if (pdb_ops->getsmbpwnam == NULL && pdb_ops->getsam21pwnam == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsmbpwnam: getsmbpwnam() and getsam21pwnam() not supported!\n"));
return NULL;
}
if (pdb_ops->getsam21pwnam != NULL)
{
return pdb_ops->getsmbpwnam(name);
}
return pdb_sam_to_smb(getsam21pwnam(name));
}
/************************************************************************
Routine to search smb passwd by uid.
*************************************************************************/
struct smb_passwd *getsmbpwuid(uid_t smb_userid)
{
if (pdb_ops->getsmbpwuid == NULL && pdb_ops->getsam21pwrid == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsmbpwuid: getsmbpwuid() and getsam21pwrid() not supported!\n"));
return NULL;
}
if (pdb_ops->getsmbpwuid != NULL)
{
return pdb_ops->getsmbpwuid(smb_userid);
}
return pdb_sam_to_smb(pdb_ops->getsam21pwuid(pdb_uid_to_user_rid(smb_userid)));
}
/*
* Functions that manupulate a struct sam_passwd.
*/
/************************************************************************
Utility function to search sam passwd by name. use this if your database
does not have search facilities.
*************************************************************************/
struct sam_passwd *iterate_getsam21pwnam(char *name)
{
struct sam_passwd *pwd = NULL;
void *fp = NULL;
DEBUG(10, ("iterate_getsam21pwnam: search by name: %s\n", name));
/* Open the smb password database - not for update. */
fp = startsmbpwent(False);
if (fp == NULL)
{
DEBUG(0, ("iterate_getsam21pwnam: unable to open sam password database.\n"));
return NULL;
}
while ((pwd = getsam21pwent(fp)) != NULL && !strequal(pwd->smb_name, name))
;
if (pwd != NULL)
{
DEBUG(10, ("iterate_getsam21pwnam: found by name: %s\n", name));
}
endsmbpwent(fp);
return pwd;
}
/************************************************************************
Utility function to search sam passwd by uid. use this if your database
does not have search facilities.
search capability by both rid and uid are needed as the rid <-> uid
mapping may be non-monotonic.
*************************************************************************/
struct sam_passwd *iterate_getsam21pwrid(uint32 rid)
{
struct sam_passwd *pwd = NULL;
void *fp = NULL;
DEBUG(10, ("iterate_getsam21pwrid: search by rid: %x\n", rid));
/* Open the smb password file - not for update. */
fp = startsmbpwent(False);
if (fp == NULL)
{
DEBUG(0, ("iterate_getsam21pwrid: unable to open sam password database.\n"));
return NULL;
}
while ((pwd = getsam21pwent(fp)) != NULL && pwd->user_rid != rid)
;
if (pwd != NULL)
{
DEBUG(10, ("iterate_getsam21pwrid: found by user_rid: %x\n", rid));
}
endsmbpwent(fp);
return pwd;
}
/************************************************************************
Utility function to search sam passwd by uid. use this if your database
does not have search facilities.
search capability by both rid and uid are needed as the rid <-> uid
mapping may be non-monotonic.
*************************************************************************/
struct sam_passwd *iterate_getsam21pwuid(uid_t uid)
{
struct sam_passwd *pwd = NULL;
void *fp = NULL;
DEBUG(10, ("iterate_getsam21pwuid: search by uid: %x\n", uid));
/* Open the smb password file - not for update. */
fp = startsmbpwent(False);
if (fp == NULL)
{
DEBUG(0, ("iterate_getsam21pwuid: unable to open sam password database.\n"));
return NULL;
}
while ((pwd = getsam21pwent(fp)) != NULL && pwd->smb_userid != uid)
;
if (pwd != NULL)
{
DEBUG(10, ("iterate_getsam21pwuid: found by smb_userid: %x\n", uid));
}
endsmbpwent(fp);
return pwd;
}
/*************************************************************************
Routine to return a display info structure, by rid
*************************************************************************/
struct sam_disp_info *getsamdisprid(uint32 rid)
{
if (pdb_ops->getsamdisprid != NULL)
{
return pdb_ops->getsamdisprid(rid);
}
return pdb_sam_to_dispinfo(pdb_ops->getsam21pwrid(rid));
}
/*************************************************************************
Routine to return the next entry in the sam passwd list.
*************************************************************************/
struct sam_disp_info *getsamdispent(void *vp)
{
if (pdb_ops->getsamdispent != NULL)
{
return pdb_ops->getsamdispent(vp);
}
return pdb_sam_to_dispinfo(pdb_ops->getsam21pwent(vp));
}
/*************************************************************************
Routine to return the next entry in the sam passwd list.
*************************************************************************/
struct sam_passwd *getsam21pwent(void *vp)
{
if (pdb_ops->getsmbpwent == NULL && pdb_ops->getsam21pwent == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsmbpwent: getsmbpwent() and getsam21pwent() not supported!\n"));
return NULL;
}
if (pdb_ops->getsam21pwent != NULL)
{
return pdb_ops->getsam21pwent(vp);
}
return pdb_smb_to_sam(pdb_ops->getsmbpwent(vp));
}
/************************************************************************
Routine to add an entry to the sam passwd file.
*************************************************************************/
BOOL add_sam21pwd_entry(struct sam_passwd *newpwd)
{
if (pdb_ops->add_smbpwd_entry == NULL && pdb_ops->add_sam21pwd_entry == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("add_smbpwd_entry: add_smbpwd_entry() and add_sam21pwd_entry() not supported!\n"));
return False;
}
if (pdb_ops->add_sam21pwd_entry != NULL)
{
return pdb_ops->add_sam21pwd_entry(newpwd);
}
return pdb_ops->add_smbpwd_entry(pdb_sam_to_smb(newpwd));
}
/************************************************************************
Routine to search the sam passwd database for an entry matching the username.
and then modify its password entry. We can't use the startsampwent()/
getsampwent()/endsampwent() interfaces here as we depend on looking
in the actual file to decide how much room we have to write data.
override = False, normal
override = True, override XXXXXXXX'd out password or NO PASS
************************************************************************/
BOOL mod_sam21pwd_entry(struct sam_passwd* pwd, BOOL override)
{
if (pdb_ops->mod_smbpwd_entry == NULL && pdb_ops->mod_sam21pwd_entry == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("mod_smbpwd_entry: mod_smbpwd_entry() and mod_sam21pwd_entry() not supported!\n"));
return False;
}
if (pdb_ops->mod_sam21pwd_entry != NULL)
{
return pdb_ops->mod_sam21pwd_entry(pwd, override);
}
return pdb_ops->mod_smbpwd_entry(pdb_sam_to_smb(pwd), override);
}
/************************************************************************
Routine to search sam passwd by name.
*************************************************************************/
struct sam_passwd *getsam21pwnam(char *name)
{
if (pdb_ops->getsmbpwnam == NULL && pdb_ops->getsam21pwnam == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsam21pwnam: getsmbpwnam() and getsam21pwnam() not supported!\n"));
return NULL;
}
if (pdb_ops->getsam21pwnam != NULL)
{
return pdb_ops->getsam21pwnam(name);
}
return pdb_smb_to_sam(getsmbpwnam(name));
}
/************************************************************************
Routine to search sam passwd by rid.
*************************************************************************/
struct sam_passwd *getsam21pwrid(uint32 rid)
{
if (pdb_ops->getsmbpwuid == NULL && pdb_ops->getsam21pwrid == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsam21pwrid: getsmbpwuid() and getsam21pwrid() not supported!\n"));
return NULL;
}
if (pdb_ops->getsam21pwrid != NULL)
{
return pdb_ops->getsam21pwrid(rid);
}
return pdb_smb_to_sam(pdb_ops->getsmbpwuid(pdb_user_rid_to_uid(rid)));
}
/************************************************************************
Routine to search sam passwd by uid.
*************************************************************************/
struct sam_passwd *getsam21pwuid(uid_t uid)
{
if (pdb_ops->getsmbpwuid == NULL && pdb_ops->getsam21pwrid == NULL)
{
/* must have one or the other: this is an error by the password
database implementor for the back-end you are using.
*/
DEBUG(0,("getsam21pwuid: getsmbpwuid() and getsam21pwrid() not supported!\n"));
return NULL;
}
if (pdb_ops->getsam21pwuid != NULL)
{
return pdb_ops->getsam21pwuid(uid);
}
return pdb_smb_to_sam(pdb_ops->getsmbpwuid(uid));
}
/**********************************************************
**********************************************************
utility routines which are likely to be useful to all password
databases
**********************************************************
**********************************************************/
/*************************************************************
initialises a struct sam_disp_info.
**************************************************************/
void pdb_init_dispinfo(struct sam_disp_info *user)
{
if (user == NULL) return;
bzero(user, sizeof(*user));
}
/*************************************************************
initialises a struct smb_passwd.
**************************************************************/
void pdb_init_smb(struct smb_passwd *user)
{
if (user == NULL) return;
bzero(user, sizeof(*user));
user->pass_last_set_time = (time_t)-1;
}
/*************************************************************
initialises a struct sam_passwd.
**************************************************************/
void pdb_init_sam(struct sam_passwd *user)
{
if (user == NULL) return;
bzero(user, sizeof(*user));
user->logon_time = (time_t)-1;
user->logoff_time = (time_t)-1;
user->kickoff_time = (time_t)-1;
user->pass_last_set_time = (time_t)-1;
user->pass_can_change_time = (time_t)-1;
user->pass_must_change_time = (time_t)-1;
}
/*************************************************************************
Routine to return the next entry in the sam passwd list.
*************************************************************************/
struct sam_disp_info *pdb_sam_to_dispinfo(struct sam_passwd *user)
{
static struct sam_disp_info disp_info;
if (user == NULL) return NULL;
pdb_init_dispinfo(&disp_info);
disp_info.smb_name = user->smb_name;
disp_info.full_name = user->full_name;
disp_info.user_rid = user->user_rid;
return &disp_info;
}
/*************************************************************
converts a sam_passwd structure to a smb_passwd structure.
**************************************************************/
struct smb_passwd *pdb_sam_to_smb(struct sam_passwd *user)
{
static struct smb_passwd pw_buf;
if (user == NULL) return NULL;
pdb_init_smb(&pw_buf);
pw_buf.smb_userid = user->smb_userid;
pw_buf.smb_name = user->smb_name;
pw_buf.smb_passwd = user->smb_passwd;
pw_buf.smb_nt_passwd = user->smb_nt_passwd;
pw_buf.acct_ctrl = user->acct_ctrl;
pw_buf.pass_last_set_time = user->pass_last_set_time;
return &pw_buf;
}
/*************************************************************
converts a smb_passwd structure to a sam_passwd structure.
**************************************************************/
struct sam_passwd *pdb_smb_to_sam(struct smb_passwd *user)
{
static struct sam_passwd pw_buf;
if (user == NULL) return NULL;
pdb_init_sam(&pw_buf);
pw_buf.smb_userid = user->smb_userid;
pw_buf.smb_name = user->smb_name;
pw_buf.smb_passwd = user->smb_passwd;
pw_buf.smb_nt_passwd = user->smb_nt_passwd;
pw_buf.acct_ctrl = user->acct_ctrl;
pw_buf.pass_last_set_time = user->pass_last_set_time;
return &pw_buf;
}
#if 0
COMMENTED OUT UNTIL SOMETHING ACTUALLY USES THEM. JRA.
/*******************************************************************
gets password-database-format time from a string.
********************************************************************/
static time_t get_time_from_string(char *p)
{
int i;
for (i = 0; i < 8; i++)
{
if (p[i] == '\0' || !isxdigit(p[i]))
break;
}
if (i == 8)
{
/*
* p points at 8 characters of hex digits -
* read into a time_t as the seconds since
* 1970 that the password was last changed.
*/
return (time_t)strtol((char *)p, NULL, 16);
}
return (time_t)-1;
}
/*******************************************************************
gets password last set time
********************************************************************/
time_t pdb_get_last_set_time(char *p)
{
if (*p && StrnCaseCmp((char *)p, "LCT-", 4))
{
return get_time_from_string(p + 4);
}
return (time_t)-1;
}
/*******************************************************************
sets password-database-format time in a string.
********************************************************************/
static void set_time_in_string(char *p, int max_len, char *type, time_t t)
{
slprintf(p, max_len, ":%s-%08X:", type, (uint32)t);
}
/*******************************************************************
sets password last set time
********************************************************************/
void pdb_set_last_set_time(char *p, int max_len, time_t t)
{
set_time_in_string(p, max_len, "LCT", t);
}
#endif /* 0 */
/**********************************************************
Encode the account control bits into a string.
**********************************************************/
char *pdb_encode_acct_ctrl(uint16 acct_ctrl)
{
static fstring acct_str;
char *p = acct_str;
*p++ = '[';
if (acct_ctrl & ACB_HOMDIRREQ) *p++ = 'H';
if (acct_ctrl & ACB_TEMPDUP ) *p++ = 'T';
if (acct_ctrl & ACB_NORMAL ) *p++ = 'U';
if (acct_ctrl & ACB_MNS ) *p++ = 'M';
if (acct_ctrl & ACB_WSTRUST ) *p++ = 'W';
if (acct_ctrl & ACB_SVRTRUST ) *p++ = 'S';
if (acct_ctrl & ACB_AUTOLOCK ) *p++ = 'L';
if (acct_ctrl & ACB_PWNOEXP ) *p++ = 'X';
if (acct_ctrl & ACB_DOMTRUST ) *p++ = 'I';
*p++ = ']';
*p = '\0';
return acct_str;
}
/**********************************************************
Decode the account control bits from a string.
this function breaks coding standards minimum line width of 80 chars.
reason: vertical line-up code clarity - all case statements fit into
15 lines, which is more important.
**********************************************************/
uint16 pdb_decode_acct_ctrl(char *p)
{
uint16 acct_ctrl = 0;
BOOL finished = False;
/*
* Check if the account type bits have been encoded after the
* NT password (in the form [NDHTUWSLXI]).
*/
if (*p != '[') return 0;
for (p++; *p && !finished; p++)
{
switch (*p)
{
#if 0
/*
* Hmmm. Don't allow these to be set/read independently
* of the actual password fields. We don't want a mismatch.
* JRA.
*/
case 'N': { acct_ctrl |= ACB_PWNOTREQ ; break; /* 'N'o password. */ }
case 'D': { acct_ctrl |= ACB_DISABLED ; break; /* 'D'isabled. */ }
#endif
case 'H': { acct_ctrl |= ACB_HOMDIRREQ; break; /* 'H'omedir required. */ }
case 'T': { acct_ctrl |= ACB_TEMPDUP ; break; /* 'T'emp account. */ }
case 'U': { acct_ctrl |= ACB_NORMAL ; break; /* 'U'ser account (normal). */ }
case 'M': { acct_ctrl |= ACB_MNS ; break; /* 'M'NS logon user account. What is this ? */ }
case 'W': { acct_ctrl |= ACB_WSTRUST ; break; /* 'W'orkstation account. */ }
case 'S': { acct_ctrl |= ACB_SVRTRUST ; break; /* 'S'erver account. */ }
case 'L': { acct_ctrl |= ACB_AUTOLOCK ; break; /* 'L'ocked account. */ }
case 'X': { acct_ctrl |= ACB_PWNOEXP ; break; /* No 'X'piry on password */ }
case 'I': { acct_ctrl |= ACB_DOMTRUST ; break; /* 'I'nterdomain trust account. */ }
case ':':
case '\n':
case '\0':
case ']':
default: { finished = True; }
}
}
return acct_ctrl;
}
/*************************************************************
Routine to get the next 32 hex characters and turn them
into a 16 byte array.
**************************************************************/
int pdb_gethexpwd(char *p, char *pwd)
{
int i;
unsigned char lonybble, hinybble;
char *hexchars = "0123456789ABCDEF";
char *p1, *p2;
for (i = 0; i < 32; i += 2) {
hinybble = toupper(p[i]);
lonybble = toupper(p[i + 1]);
p1 = strchr(hexchars, hinybble);
p2 = strchr(hexchars, lonybble);
if (!p1 || !p2)
return (False);
hinybble = PTR_DIFF(p1, hexchars);
lonybble = PTR_DIFF(p2, hexchars);
pwd[i / 2] = (hinybble << 4) | lonybble;
}
return (True);
}
/*******************************************************************
Group and User RID username mapping function
********************************************************************/
BOOL pdb_name_to_rid(char *user_name, uint32 *u_rid, uint32 *g_rid)
{
struct passwd *pw = Get_Pwnam(user_name, False);
if (u_rid == NULL || g_rid == NULL || user_name == NULL)
{
return False;
}
if (!pw)
{
DEBUG(1,("Username %s is invalid on this system\n", user_name));
return False;
}
if (user_in_list(user_name, lp_domain_guest_users()))
{
*u_rid = DOMAIN_USER_RID_GUEST;
}
else if (user_in_list(user_name, lp_domain_admin_users()))
{
*u_rid = DOMAIN_USER_RID_ADMIN;
}
else
{
/* turn the unix UID into a Domain RID. this is what the posix
sub-system does (adds 1000 to the uid) */
*u_rid = pdb_uid_to_user_rid(pw->pw_uid);
}
/* absolutely no idea what to do about the unix GID to Domain RID mapping */
*g_rid = pdb_gid_to_group_rid(pw->pw_gid);
return True;
}
/****************************************************************************
Read the machine SID from a file.
****************************************************************************/
static BOOL read_sid_from_file(int fd, char *sid_file)
{
fstring fline;
if(read(fd, &fline, sizeof(fline) -1 ) < 0) {
DEBUG(0,("read_sid_from_file: unable to read file %s. Error was %s\n",
sid_file, strerror(errno) ));
return False;
}
/*
* Convert to the machine SID.
*/
fline[sizeof(fline)-1] = '\0';
if(!string_to_sid( &global_machine_sid, fline)) {
DEBUG(0,("read_sid_from_file: unable to generate machine SID.\n"));
return False;
}
return True;
}
/****************************************************************************
Generate the global machine sid. Look for the MACHINE.SID file first, if
not found then look in smb.conf and use it to create the MACHINE.SID file.
****************************************************************************/
BOOL pdb_generate_machine_sid(void)
{
int fd;
char *p;
pstring sid_file;
fstring sid_string;
struct stat st;
uchar raw_sid_data[12];
pstrcpy(sid_file, lp_smb_passwd_file());
p = strrchr(sid_file, '/');
if(p != NULL)
*++p = '\0';
pstrcat(sid_file, "MACHINE.SID");
if((fd = open( sid_file, O_RDWR | O_CREAT, 0644)) < 0 ) {
DEBUG(0,("generate_machine_sid: unable to open or create file %s. Error was %s\n",
sid_file, strerror(errno) ));
return False;
}
/*
* Check if the file contains data.
*/
if(fstat( fd, &st) < 0) {
DEBUG(0,("generate_machine_sid: unable to stat file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
if(st.st_size > 0) {
/*
* We have a valid SID - read it.
*/
if(!read_sid_from_file( fd, sid_file)) {
DEBUG(0,("generate_machine_sid: unable to read file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
close(fd);
return True;
}
/*
* The file contains no data - we may need to generate our
* own sid. Try the lp_domain_sid() first.
*/
if(*lp_domain_sid())
fstrcpy( sid_string, lp_domain_sid());
else {
/*
* Generate the new sid data & turn it into a string.
*/
int i;
generate_random_buffer( raw_sid_data, 12, True);
fstrcpy( sid_string, "S-1-5-21");
for( i = 0; i < 3; i++) {
fstring tmp_string;
slprintf( tmp_string, sizeof(tmp_string) - 1, "-%u", IVAL(raw_sid_data, i*4));
fstrcat( sid_string, tmp_string);
}
}
fstrcat(sid_string, "\n");
/*
* Ensure our new SID is valid.
*/
if(!string_to_sid( &global_machine_sid, sid_string)) {
DEBUG(0,("generate_machine_sid: unable to generate machine SID.\n"));
return False;
}
/*
* Do an exclusive blocking lock on the file.
*/
if(!do_file_lock( fd, 60, F_WRLCK)) {
DEBUG(0,("generate_machine_sid: unable to lock file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
/*
* At this point we have a blocking lock on the SID
* file - check if in the meantime someone else wrote
* SID data into the file. If so - they were here first,
* use their data.
*/
if(fstat( fd, &st) < 0) {
DEBUG(0,("generate_machine_sid: unable to stat file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
if(st.st_size > 0) {
/*
* Unlock as soon as possible to reduce
* contention on the exclusive lock.
*/
do_file_lock( fd, 60, F_UNLCK);
/*
* We have a valid SID - read it.
*/
if(!read_sid_from_file( fd, sid_file)) {
DEBUG(0,("generate_machine_sid: unable to read file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
close(fd);
return True;
}
/*
* The file is still empty and we have an exlusive lock on it.
* Write out out SID data into the file.
*/
if(fchmod(fd, 0644) < 0) {
DEBUG(0,("generate_machine_sid: unable to set correct permissions on file %s. \
Error was %s\n", sid_file, strerror(errno) ));
close(fd);
return False;
}
if(write( fd, sid_string, strlen(sid_string)) != strlen(sid_string)) {
DEBUG(0,("generate_machine_sid: unable to write file %s. Error was %s\n",
sid_file, strerror(errno) ));
close(fd);
return False;
}
/*
* Unlock & exit.
*/
do_file_lock( fd, 60, F_UNLCK);
close(fd);
return True;
}
/*******************************************************************
converts NT User RID to a UNIX uid.
********************************************************************/
uid_t pdb_user_rid_to_uid(uint32 u_rid)
{
return (uid_t)(u_rid - 1000);
}
/*******************************************************************
converts NT Group RID to a UNIX uid.
********************************************************************/
gid_t pdb_group_rid_to_gid(uint32 g_rid)
{
return (gid_t)(g_rid - 1000);
}
/*******************************************************************
converts UNIX uid to an NT User RID.
********************************************************************/
uint32 pdb_uid_to_user_rid(uid_t uid)
{
return (uint32)(uid + 1000);
}
/*******************************************************************
converts NT Group RID to a UNIX uid.
********************************************************************/
uint32 pdb_gid_to_group_rid(gid_t gid)
{
return (uint32)(gid + 1000);
}
/*******************************************************************
Decides if a RID is a user or group RID.
********************************************************************/
BOOL pdb_rid_is_user(uint32 rid)
{
/* Punt for now - we need to look at the encoding here. JRA. */
/* lkcl i understand that NT attaches an enumeration to a RID
* such that it can be identified as either a user, group etc
* type. there are 5 such categories, and they are documented.
*/
return True;
}
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