srv_lsa_nt.c

samba-3.0.22.tar.gz 编译smb服务器的源码

/*
 *  Unix SMB/CIFS implementation.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-1997,
 *  Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
 *  Copyright (C) Paul Ashton                       1997,
 *  Copyright (C) Jeremy Allison                    2001,
 *  Copyright (C) Rafal Szczesniak                  2002,
 *  Copyright (C) Jim McDonough <[e-mail]>   2002,
 *  Copyright (C) Simo Sorce                        2003.
 *  Copyright (C) Gerald (Jerry) Carter             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.
 */

/* This is the implementation of the lsa server code. */

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV

extern PRIVS privs[];

struct lsa_info {
	DOM_SID sid;
	uint32 access;
};

struct generic_mapping lsa_generic_mapping = {
	POLICY_READ,
	POLICY_WRITE,
	POLICY_EXECUTE,
	POLICY_ALL_ACCESS
};

/*******************************************************************
 Function to free the per handle data.
 ********************************************************************/

static void free_lsa_info(void *ptr)
{
	struct lsa_info *lsa = (struct lsa_info *)ptr;

	SAFE_FREE(lsa);
}

/***************************************************************************
Init dom_query
 ***************************************************************************/

static void init_dom_query(DOM_QUERY *d_q, const char *dom_name, DOM_SID *dom_sid)
{
	d_q->buffer_dom_name = (dom_name != NULL) ? 1 : 0; /* domain buffer pointer */
	d_q->buffer_dom_sid = (dom_sid != NULL) ? 1 : 0;  /* domain sid pointer */

	/* this string is supposed to be non-null terminated. */
	/* But the maxlen in this UNISTR2 must include the terminating null. */
	init_unistr2(&d_q->uni_domain_name, dom_name, UNI_BROKEN_NON_NULL);

	/*
	 * I'm not sure why this really odd combination of length
	 * values works, but it does appear to. I need to look at
	 * this *much* more closely - but at the moment leave alone
	 * until it's understood. This allows a W2k client to join
	 * a domain with both odd and even length names... JRA.
	 */

	/*
	 * IMPORTANT NOTE !!!!
	 * The two fields below probably are reversed in meaning, ie.
	 * the first field is probably the str_len, the second the max
	 * len. Both are measured in bytes anyway.
	 */

	d_q->uni_dom_str_len = d_q->uni_domain_name.uni_max_len * 2;
	d_q->uni_dom_max_len = d_q->uni_domain_name.uni_str_len * 2;

	if (dom_sid != NULL)
		init_dom_sid2(&d_q->dom_sid, dom_sid);
}

/***************************************************************************
 init_dom_ref - adds a domain if it's not already in, returns the index.
***************************************************************************/

static int init_dom_ref(DOM_R_REF *ref, char *dom_name, DOM_SID *dom_sid)
{
	int num = 0;

	if (dom_name != NULL) {
		for (num = 0; num < ref->num_ref_doms_1; num++) {
			fstring domname;
			rpcstr_pull(domname, ref->ref_dom[num].uni_dom_name.buffer, sizeof(domname), -1, 0);
			if (strequal(domname, dom_name))
				return num;
		}
	} else {
		num = ref->num_ref_doms_1;
	}

	if (num >= MAX_REF_DOMAINS) {
		/* index not found, already at maximum domain limit */
		return -1;
	}

	ref->num_ref_doms_1 = num+1;
	ref->ptr_ref_dom  = 1;
	ref->max_entries = MAX_REF_DOMAINS;
	ref->num_ref_doms_2 = num+1;

	ref->hdr_ref_dom[num].ptr_dom_sid = dom_sid != NULL ? 1 : 0;

	init_unistr2(&ref->ref_dom[num].uni_dom_name, dom_name, UNI_FLAGS_NONE);
	init_uni_hdr(&ref->hdr_ref_dom[num].hdr_dom_name, &ref->ref_dom[num].uni_dom_name);

	init_dom_sid2(&ref->ref_dom[num].ref_dom, dom_sid );

	return num;
}

/***************************************************************************
 init_lsa_rid2s
 ***************************************************************************/

static void init_lsa_rid2s(DOM_R_REF *ref, DOM_RID2 *rid2,
				int num_entries, UNISTR2 *name,
				uint32 *mapped_count, BOOL endian)
{
	int i;
	int total = 0;
	*mapped_count = 0;

	SMB_ASSERT(num_entries <= MAX_LOOKUP_SIDS);

	become_root(); /* lookup_name can require root privs */

	for (i = 0; i < num_entries; i++) {
		BOOL status = False;
		DOM_SID sid;
		uint32 rid = 0xffffffff;
		int dom_idx = -1;
		pstring full_name;
		fstring dom_name, user;
		enum SID_NAME_USE name_type = SID_NAME_UNKNOWN;

		/* Split name into domain and user component */

		unistr2_to_ascii(full_name, &name[i], sizeof(full_name));
		split_domain_name(full_name, dom_name, user);

		/* Lookup name */

		DEBUG(5, ("init_lsa_rid2s: looking up name %s\n", full_name));

		status = lookup_name(dom_name, user, &sid, &name_type);

		if((name_type == SID_NAME_UNKNOWN) && (lp_server_role() == ROLE_DOMAIN_MEMBER)  && (strncmp(dom_name, full_name, strlen(dom_name)) != 0)) {
			DEBUG(5, ("init_lsa_rid2s: domain name not provided and local account not found, using member domain\n"));
			fstrcpy(dom_name, lp_workgroup());
			status = lookup_name(dom_name, user, &sid, &name_type);
		}

		if (name_type == SID_NAME_WKN_GRP) {
			/* BUILTIN aliases are still aliases :-) */
			name_type = SID_NAME_ALIAS;
		}

		DEBUG(5, ("init_lsa_rid2s: %s\n", status ? "found" : 
			  "not found"));

		if (status && name_type != SID_NAME_UNKNOWN) {
			sid_split_rid(&sid, &rid);
			dom_idx = init_dom_ref(ref, dom_name, &sid);
			(*mapped_count)++;
		} else {
			dom_idx = -1;
			rid = 0;
			name_type = SID_NAME_UNKNOWN;
		}

		init_dom_rid2(&rid2[total], rid, name_type, dom_idx);
		total++;
	}

	unbecome_root();
}

/***************************************************************************
 init_reply_lookup_names
 ***************************************************************************/

static void init_reply_lookup_names(LSA_R_LOOKUP_NAMES *r_l,
                DOM_R_REF *ref, uint32 num_entries,
                DOM_RID2 *rid2, uint32 mapped_count)
{
	r_l->ptr_dom_ref  = 1;
	r_l->dom_ref      = ref;

	r_l->num_entries  = num_entries;
	r_l->ptr_entries  = 1;
	r_l->num_entries2 = num_entries;
	r_l->dom_rid      = rid2;

	r_l->mapped_count = mapped_count;
}

/***************************************************************************
 Init lsa_trans_names.
 ***************************************************************************/

static void init_lsa_trans_names(TALLOC_CTX *ctx, DOM_R_REF *ref, LSA_TRANS_NAME_ENUM *trn,
				 int num_entries, DOM_SID2 *sid,
				 uint32 *mapped_count)
{
	int i;
	int total = 0;
	*mapped_count = 0;

	/* Allocate memory for list of names */

	if (num_entries > 0) {
		if (!(trn->name = TALLOC_ARRAY(ctx, LSA_TRANS_NAME, num_entries))) {
			DEBUG(0, ("init_lsa_trans_names(): out of memory\n"));
			return;
		}

		if (!(trn->uni_name = TALLOC_ARRAY(ctx, UNISTR2, num_entries))) {
			DEBUG(0, ("init_lsa_trans_names(): out of memory\n"));
			return;
		}
	}

	become_root(); /* Need root to get to passdb to for local sids */

	for (i = 0; i < num_entries; i++) {
		BOOL status = False;
		DOM_SID find_sid = sid[i].sid;
		uint32 rid = 0xffffffff;
		int dom_idx = -1;
		fstring name, dom_name;
		enum SID_NAME_USE sid_name_use = (enum SID_NAME_USE)0;

		sid_to_string(name, &find_sid);
		DEBUG(5, ("init_lsa_trans_names: looking up sid %s\n", name));

		/* Lookup sid from winbindd */

		status = lookup_sid(&find_sid, dom_name, name, &sid_name_use);

		DEBUG(5, ("init_lsa_trans_names: %s\n", status ? "found" : 
			  "not found"));

		if (!status) {
			sid_name_use = SID_NAME_UNKNOWN;
			memset(dom_name, '\0', sizeof(dom_name));
			sid_to_string(name, &find_sid);
			dom_idx = -1;

			DEBUG(10,("init_lsa_trans_names: added unknown user '%s' to "
				  "referenced list.\n", name ));
		} else {
			(*mapped_count)++;
			/* Store domain sid in ref array */
			if (find_sid.num_auths == 5) {
				sid_split_rid(&find_sid, &rid);
			}
			dom_idx = init_dom_ref(ref, dom_name, &find_sid);

			DEBUG(10,("init_lsa_trans_names: added %s '%s\\%s' (%d) to referenced list.\n", 
				sid_type_lookup(sid_name_use), dom_name, name, sid_name_use ));

		}

		init_lsa_trans_name(&trn->name[total], &trn->uni_name[total],
					sid_name_use, name, dom_idx);
		total++;
	}

	unbecome_root();

	trn->num_entries = total;
	trn->ptr_trans_names = 1;
	trn->num_entries2 = total;
}

/***************************************************************************
 Init_reply_lookup_sids.
 ***************************************************************************/

static void init_reply_lookup_sids(LSA_R_LOOKUP_SIDS *r_l,
                DOM_R_REF *ref, LSA_TRANS_NAME_ENUM *names,
                uint32 mapped_count)
{
	r_l->ptr_dom_ref  = 1;
	r_l->dom_ref      = ref;
	r_l->names        = names;
	r_l->mapped_count = mapped_count;
}

static NTSTATUS lsa_get_generic_sd(TALLOC_CTX *mem_ctx, SEC_DESC **sd, size_t *sd_size)
{
	DOM_SID local_adm_sid;
	DOM_SID adm_sid;

	SEC_ACE ace[3];
	SEC_ACCESS mask;

	SEC_ACL *psa = NULL;

	init_sec_access(&mask, POLICY_EXECUTE);
	init_sec_ace(&ace[0], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	sid_copy(&adm_sid, get_global_sam_sid());
	sid_append_rid(&adm_sid, DOMAIN_GROUP_RID_ADMINS);
	init_sec_access(&mask, POLICY_ALL_ACCESS);
	init_sec_ace(&ace[1], &adm_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	sid_copy(&local_adm_sid, &global_sid_Builtin);
	sid_append_rid(&local_adm_sid, BUILTIN_ALIAS_RID_ADMINS);
	init_sec_access(&mask, POLICY_ALL_ACCESS);
	init_sec_ace(&ace[2], &local_adm_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	if((psa = make_sec_acl(mem_ctx, NT4_ACL_REVISION, 3, ace)) == NULL)
		return NT_STATUS_NO_MEMORY;

	if((*sd = make_sec_desc(mem_ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, &adm_sid, NULL, NULL, psa, sd_size)) == NULL)
		return NT_STATUS_NO_MEMORY;

	return NT_STATUS_OK;
}

#if 0	/* AD DC work in ongoing in Samba 4 */

/***************************************************************************
 Init_dns_dom_info.
***************************************************************************/

static void init_dns_dom_info(LSA_DNS_DOM_INFO *r_l, const char *nb_name,
			      const char *dns_name, const char *forest_name,
			      struct uuid *dom_guid, DOM_SID *dom_sid)
{
	if (nb_name && *nb_name) {
		init_unistr2(&r_l->uni_nb_dom_name, nb_name, UNI_FLAGS_NONE);
		init_uni_hdr(&r_l->hdr_nb_dom_name, &r_l->uni_nb_dom_name);
		r_l->hdr_nb_dom_name.uni_max_len += 2;
		r_l->uni_nb_dom_name.uni_max_len += 1;
	}
	
	if (dns_name && *dns_name) {
		init_unistr2(&r_l->uni_dns_dom_name, dns_name, UNI_FLAGS_NONE);
		init_uni_hdr(&r_l->hdr_dns_dom_name, &r_l->uni_dns_dom_name);
		r_l->hdr_dns_dom_name.uni_max_len += 2;
		r_l->uni_dns_dom_name.uni_max_len += 1;
	}

	if (forest_name && *forest_name) {
		init_unistr2(&r_l->uni_forest_name, forest_name, UNI_FLAGS_NONE);
		init_uni_hdr(&r_l->hdr_forest_name, &r_l->uni_forest_name);
		r_l->hdr_forest_name.uni_max_len += 2;
		r_l->uni_forest_name.uni_max_len += 1;
	}

	/* how do we init the guid ? probably should write an init fn */
	if (dom_guid) {
		memcpy(&r_l->dom_guid, dom_guid, sizeof(struct uuid));
	}
	
	if (dom_sid) {
		r_l->ptr_dom_sid = 1;
		init_dom_sid2(&r_l->dom_sid, dom_sid);
	}
}
#endif	/* AD DC work in ongoing in Samba 4 */


/***************************************************************************
 _lsa_open_policy2.
 ***************************************************************************/