util_sid.c

samba-3.0.22.tar.gz 编译smb服务器的源码

/* 
   Unix SMB/CIFS implementation.
   Samba utility functions
   Copyright (C) Andrew Tridgell 		1992-1998
   Copyright (C) Luke Kenneth Caseson Leighton 	1998-1999
   Copyright (C) Jeremy Allison  		1999
   Copyright (C) Stefan (metze) Metzmacher 	2002
   Copyright (C) Simo Sorce 			2002
   Copyright (C) Jim McDonough <[e-mail]> 2005
      
   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"

/*
 * Some useful sids
 */


const DOM_SID global_sid_World_Domain =               /* Everyone domain */
{ 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_World =                      /* Everyone */
{ 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
{ 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_NT_Authority =    		/* NT Authority */
{ 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_System =			/* System */
{ 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_NULL =            		/* NULL sid */
{ 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Authenticated_Users =	/* All authenticated rids */
{ 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Network =			/* Network rids */
{ 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};

const DOM_SID global_sid_Creator_Owner =		/* Creator Owner */
{ 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Creator_Group =		/* Creator Group */
{ 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Anonymous =			/* Anonymous login */
{ 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};

const DOM_SID global_sid_Builtin = 			/* Local well-known domain */
{ 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Administrators =	/* Builtin administrators */
{ 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Users =		/* Builtin users */
{ 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Guests =		/* Builtin guest users */
{ 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Power_Users =	/* Builtin power users */
{ 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Account_Operators =	/* Builtin account operators */
{ 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Server_Operators =	/* Builtin server operators */
{ 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Print_Operators =	/* Builtin print operators */
{ 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Backup_Operators =	/* Builtin backup operators */
{ 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Replicator =		/* Builtin replicator */
{ 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};

#define SECURITY_NULL_SID_AUTHORITY    0
#define SECURITY_WORLD_SID_AUTHORITY   1
#define SECURITY_LOCAL_SID_AUTHORITY   2
#define SECURITY_CREATOR_SID_AUTHORITY 3
#define SECURITY_NT_AUTHORITY          5

/*
 * An NT compatible anonymous token.
 */

static DOM_SID anon_sid_array[3] =
{ { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
  { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
  { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };

static DOM_SID system_sid_array[1] =
{ { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };

/****************************************************************************
 Lookup string names for SID types.
****************************************************************************/

static const struct {
	enum SID_NAME_USE sid_type;
	const char *string;
} sid_name_type[] = {
	{SID_NAME_USER, "User"},
	{SID_NAME_DOM_GRP, "Domain Group"},
	{SID_NAME_DOMAIN, "Domain"},
	{SID_NAME_ALIAS, "Local Group"},
	{SID_NAME_WKN_GRP, "Well-known Group"},
	{SID_NAME_DELETED, "Deleted Account"},
	{SID_NAME_INVALID, "Invalid Account"},
	{SID_NAME_UNKNOWN, "UNKNOWN"},
	{SID_NAME_COMPUTER, "Computer"},

 	{(enum SID_NAME_USE)0, NULL}
};

const char *sid_type_lookup(uint32 sid_type) 
{
	int i = 0;

	/* Look through list */
	while(sid_name_type[i].sid_type != 0) {
		if (sid_name_type[i].sid_type == sid_type)
			return sid_name_type[i].string;
		i++;
	}

	/* Default return */
	return "SID *TYPE* is INVALID";
}

/**************************************************************************
 Create the SYSTEM token.
***************************************************************************/

NT_USER_TOKEN *get_system_token(void) 
{
	return &system_token;
}

/******************************************************************
 get the default domain/netbios name to be used when dealing 
 with our passdb list of accounts
******************************************************************/

const char *get_global_sam_name(void) 
{
	if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
		return lp_workgroup();
	}
	return global_myname();
}

/**************************************************************************
 Splits a name of format \DOMAIN\name or name into its two components.
 Sets the DOMAIN name to global_myname() if it has not been specified.
***************************************************************************/

void split_domain_name(const char *fullname, char *domain, char *name)
{
	pstring full_name;
	const char *sep;
	char *p;

	sep = lp_winbind_separator();

	*domain = *name = '\0';

	if (fullname[0] == sep[0] || fullname[0] == '\\')
		fullname++;

	pstrcpy(full_name, fullname);
	p = strchr_m(full_name+1, '\\');
	if (!p) p = strchr_m(full_name+1, sep[0]);

	if (p != NULL) {
		*p = 0;
		fstrcpy(domain, full_name);
		fstrcpy(name, p+1);
	} else {
		fstrcpy(domain, get_global_sam_name());
		fstrcpy(name, full_name);
	}

	DEBUG(10,("split_domain_name:name '%s' split into domain :'%s' and user :'%s'\n",
			fullname, domain, name));
}

/****************************************************************************
 Test if a SID is wellknown and resolvable.
****************************************************************************/

BOOL resolvable_wellknown_sid(DOM_SID *sid)
{
	uint32 ia = (sid->id_auth[5]) +
			(sid->id_auth[4] << 8 ) +
			(sid->id_auth[3] << 16) +
			(sid->id_auth[2] << 24);

	if (sid->sid_rev_num != SEC_DESC_REVISION || sid->num_auths < 1)
		return False;

	return (ia == SECURITY_WORLD_SID_AUTHORITY ||
		ia == SECURITY_CREATOR_SID_AUTHORITY);
}

/*****************************************************************
 Convert a SID to an ascii string.
*****************************************************************/

char *sid_to_string(fstring sidstr_out, const DOM_SID *sid)
{
	char subauth[16];
	int i;
	uint32 ia;
  
	if (!sid) {
		fstrcpy(sidstr_out, "(NULL SID)");
		return sidstr_out;
	}

	/*
	 * BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 
	 * in a range of 2^48.
	 */
	ia = (sid->id_auth[5]) +
		(sid->id_auth[4] << 8 ) +
		(sid->id_auth[3] << 16) +
		(sid->id_auth[2] << 24);

	slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);

	for (i = 0; i < sid->num_auths; i++) {
		slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
		fstrcat(sidstr_out, subauth);
	}

	return sidstr_out;
}

/*****************************************************************
 Useful function for debug lines.
*****************************************************************/  

const char *sid_string_static(const DOM_SID *sid)
{
	static fstring sid_str;
	sid_to_string(sid_str, sid);
	return sid_str;
}

/*****************************************************************
 Convert a string to a SID. Returns True on success, False on fail.
*****************************************************************/  
   
BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
{
	const char *p;
	char *q;
	/* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
	uint32 conv;
  
	if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
		DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
		return False;
	}

	ZERO_STRUCTP(sidout);

	/* Get the revision number. */
	p = sidstr + 2;
	conv = (uint32) strtoul(p, &q, 10);
	if (!q || (*q != '-')) {
		DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
		return False;
	}
	sidout->sid_rev_num = (uint8) conv;
	q++;

	/* get identauth */
	conv = (uint32) strtoul(q, &q, 10);
	if (!q || (*q != '-')) {
		DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
		return False;
	}
	/* identauth in decimal should be <  2^32 */
	/* NOTE - the conv value is in big-endian format. */
	sidout->id_auth[0] = 0;
	sidout->id_auth[1] = 0;
	sidout->id_auth[2] = (conv & 0xff000000) >> 24;
	sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
	sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
	sidout->id_auth[5] = (conv & 0x000000ff);

	q++;
	sidout->num_auths = 0;

	for(conv = (uint32) strtoul(q, &q, 10);
	    q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS);
	    conv = (uint32) strtoul(q, &q, 10)) {
		sid_append_rid(sidout, conv);
		if (*q == '\0')
			break;
		q++;
	}
		
	return True;
}

DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
{
	DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);

	if (result == NULL)
		return NULL;

	if (!string_to_sid(result, sidstr))
		return NULL;

	return result;
}

/*****************************************************************
 Add a rid to the end of a sid
*****************************************************************/  

BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
{
	if (sid->num_auths < MAXSUBAUTHS) {
		sid->sub_auths[sid->num_auths++] = rid;
		return True;
	}
	return False;
}

BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
{
	sid_copy(dst, domain_sid);
	return sid_append_rid(dst, rid);
}

/*****************************************************************
 Removes the last rid from the end of a sid
*****************************************************************/  

BOOL sid_split_rid(DOM_SID *sid, uint32 *rid)
{
	if (sid->num_auths > 0) {
		sid->num_auths--;