nsswitch/winbindd_sid.c

説明を見る。

/* 
   Unix SMB/CIFS implementation.

   Winbind daemon - sid related functions

   Copyright (C) Tim Potter 2000
   
   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 "winbindd.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

/* Convert a string  */

static void lookupsid_recv(void *private_data, BOOL success,
                           const char *dom_name, const char *name,
                           enum lsa_SidType type);

void winbindd_lookupsid(struct winbindd_cli_state *state)
{
        DOM_SID sid;

        /* Ensure null termination */
        state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

        DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid, 
                  state->request.data.sid));

        if (!string_to_sid(&sid, state->request.data.sid)) {
                DEBUG(5, ("%s not a SID\n", state->request.data.sid));
                request_error(state);
                return;
        }

        winbindd_lookupsid_async(state->mem_ctx, &sid, lookupsid_recv, state);
}

static void lookupsid_recv(void *private_data, BOOL success,
                           const char *dom_name, const char *name,
                           enum lsa_SidType type)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("lookupsid returned an error\n"));
                request_error(state);
                return;
        }

        fstrcpy(state->response.data.name.dom_name, dom_name);
        fstrcpy(state->response.data.name.name, name);
        state->response.data.name.type = type;
        request_ok(state);
}

/**
 * Look up the SID for a qualified name.  
 **/

static void lookupname_recv(void *private_data, BOOL success,
                            const DOM_SID *sid, enum lsa_SidType type);

void winbindd_lookupname(struct winbindd_cli_state *state)
{
        char *name_domain, *name_user;
        char *p;

        /* Ensure null termination */
        state->request.data.name.dom_name[sizeof(state->request.data.name.dom_name)-1]='\0';

        /* Ensure null termination */
        state->request.data.name.name[sizeof(state->request.data.name.name)-1]='\0';

        /* cope with the name being a fully qualified name */
        p = strstr(state->request.data.name.name, lp_winbind_separator());
        if (p) {
                *p = 0;
                name_domain = state->request.data.name.name;
                name_user = p+1;
        } else {
                name_domain = state->request.data.name.dom_name;
                name_user = state->request.data.name.name;
        }

        DEBUG(3, ("[%5lu]: lookupname %s%s%s\n", (unsigned long)state->pid,
                  name_domain, lp_winbind_separator(), name_user));

        winbindd_lookupname_async(state->mem_ctx, name_domain, name_user,
                                  lookupname_recv, state);
}

static void lookupname_recv(void *private_data, BOOL success,
                            const DOM_SID *sid, enum lsa_SidType type)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("lookupname returned an error\n"));
                request_error(state);
                return;
        }

        sid_to_string(state->response.data.sid.sid, sid);
        state->response.data.sid.type = type;
        request_ok(state);
        return;
}

void winbindd_lookuprids(struct winbindd_cli_state *state)
{
        struct winbindd_domain *domain;
        DOM_SID domain_sid;
        
        /* Ensure null termination */
        state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

        DEBUG(10, ("lookup_rids: %s\n", state->request.data.sid));

        if (!string_to_sid(&domain_sid, state->request.data.sid)) {
                DEBUG(5, ("Could not convert %s to SID\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        domain = find_lookup_domain_from_sid(&domain_sid);
        if (domain == NULL) {
                DEBUG(10, ("Could not find domain for name %s\n",
                           state->request.domain_name));
                request_error(state);
                return;
        }

        sendto_domain(state, domain);
}

static struct winbindd_child static_idmap_child;

void init_idmap_child(void)
{
        setup_domain_child(NULL, &static_idmap_child, "idmap");
}

struct winbindd_child *idmap_child(void)
{
        return &static_idmap_child;
}

/* Convert a sid to a uid.  We assume we only have one rid attached to the
   sid. */

static void sid2uid_recv(void *private_data, BOOL success, uid_t uid)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not convert sid %s\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        state->response.data.uid = uid;
        request_ok(state);
}

static void sid2uid_lookupsid_recv( void *private_data, BOOL success, 
                                    const char *domain_name, 
                                    const char *name, 
                                    enum lsa_SidType type)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);
        DOM_SID sid;

        if (!success) {
                DEBUG(5, ("sid2uid_lookupsid_recv Could not convert get sid type for %s\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        if ( (type!=SID_NAME_USER) && (type!=SID_NAME_COMPUTER) ) {
                DEBUG(5,("sid2uid_lookupsid_recv: Sid %s is not a user or a computer.\n", 
                         state->request.data.sid));
                request_error(state);
                return;         
        }

        if (!string_to_sid(&sid, state->request.data.sid)) {
                DEBUG(1, ("sid2uid_lookupsid_recv: Could not get convert sid %s from string\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }
        
        /* always use the async interface (may block) */
        winbindd_sid2uid_async(state->mem_ctx, &sid, sid2uid_recv, state);
}

void winbindd_sid_to_uid(struct winbindd_cli_state *state)
{
        DOM_SID sid;

        /* Ensure null termination */
        state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

        DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
                  state->request.data.sid));

        if (!string_to_sid(&sid, state->request.data.sid)) {
                DEBUG(1, ("Could not get convert sid %s from string\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        /* Validate the SID as a user.  Hopefully this will hit cache.
           Needed to prevent DoS by exhausting the uid allocation
           range from random SIDs. */

        winbindd_lookupsid_async( state->mem_ctx, &sid, sid2uid_lookupsid_recv, state );
}

/* Convert a sid to a gid.  We assume we only have one rid attached to the
   sid.*/

static void sid2gid_recv(void *private_data, BOOL success, gid_t gid)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not convert sid %s\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        state->response.data.gid = gid;
        request_ok(state);
}

static void sid2gid_lookupsid_recv( void *private_data, BOOL success, 
                                    const char *domain_name, 
                                    const char *name, 
                                    enum lsa_SidType type)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);
        DOM_SID sid;

        if (!success) {
                DEBUG(5, ("sid2gid_lookupsid_recv: Could not convert get sid type for %s\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        if ( (type!=SID_NAME_DOM_GRP) &&
             (type!=SID_NAME_ALIAS) && 
             (type!=SID_NAME_WKN_GRP) ) 
        {
                DEBUG(5,("sid2gid_lookupsid_recv: Sid %s is not a group.\n", 
                         state->request.data.sid));
                request_error(state);
                return;         
        }

        if (!string_to_sid(&sid, state->request.data.sid)) {
                DEBUG(1, ("sid2gid_lookupsid_recv: Could not get convert sid %s from string\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }
        
        /* always use the async interface (may block) */
        winbindd_sid2gid_async(state->mem_ctx, &sid, sid2gid_recv, state);
}

void winbindd_sid_to_gid(struct winbindd_cli_state *state)
{
        DOM_SID sid;

        /* Ensure null termination */
        state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

        DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
                  state->request.data.sid));

        if (!string_to_sid(&sid, state->request.data.sid)) {
                DEBUG(1, ("Could not get convert sid %s from string\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        /* Validate the SID as a group.  Hopefully this will hit cache.
           Needed to prevent DoS by exhausting the uid allocation
           range from random SIDs. */

        winbindd_lookupsid_async( state->mem_ctx, &sid, sid2gid_lookupsid_recv, state );        
}

static void sids2xids_recv(void *private_data, BOOL success, void *data, int len)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not convert sids to xids\n"));
                request_error(state);
                return;
        }

        state->response.extra_data.data = data;
        state->response.length = sizeof(state->response) + len;
        request_ok(state);
}

void winbindd_sids_to_unixids(struct winbindd_cli_state *state)
{
        DEBUG(3, ("[%5lu]: sids to xids\n", (unsigned long)state->pid));

        winbindd_sids2xids_async(state->mem_ctx,
                        state->request.extra_data.data,
                        state->request.extra_len,
                        sids2xids_recv, state);
}

static void set_mapping_recv(void *private_data, BOOL success)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not set sid mapping\n"));
                request_error(state);
                return;
        }

        request_ok(state);
}

void winbindd_set_mapping(struct winbindd_cli_state *state)
{
        struct id_map map;
        DOM_SID sid;

        DEBUG(3, ("[%5lu]: set id map\n", (unsigned long)state->pid));

        if ( ! state->privileged) {
                DEBUG(0, ("Only root is allowed to set mappings!\n"));
                request_error(state);
                return;
        }

        if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid)) {
                DEBUG(1, ("Could not get convert sid %s from string\n",
                          state->request.data.sid));
                request_error(state);
                return;
        }

        map.sid = &sid;
        map.xid.id = state->request.data.dual_idmapset.id;
        map.xid.type = state->request.data.dual_idmapset.type;

        winbindd_set_mapping_async(state->mem_ctx, &map,
                        set_mapping_recv, state);
}

static void set_hwm_recv(void *private_data, BOOL success)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not set sid mapping\n"));
                request_error(state);
                return;
        }

        request_ok(state);
}

void winbindd_set_hwm(struct winbindd_cli_state *state)
{
        struct unixid xid;

        DEBUG(3, ("[%5lu]: set hwm\n", (unsigned long)state->pid));

        if ( ! state->privileged) {
                DEBUG(0, ("Only root is allowed to set mappings!\n"));
                request_error(state);
                return;
        }

        xid.id = state->request.data.dual_idmapset.id;
        xid.type = state->request.data.dual_idmapset.type;

        winbindd_set_hwm_async(state->mem_ctx, &xid, set_hwm_recv, state);
}

/* Convert a uid to a sid */

static void uid2sid_recv(void *private_data, BOOL success, const char *sid)
{
        struct winbindd_cli_state *state =
                (struct winbindd_cli_state *)private_data;

        if (success) {
                DEBUG(10,("uid2sid: uid %lu has sid %s\n",
                          (unsigned long)(state->request.data.uid), sid));
                fstrcpy(state->response.data.sid.sid, sid);
                state->response.data.sid.type = SID_NAME_USER;
                request_ok(state);
                return;
        }

        request_error(state);
        return;
}

void winbindd_uid_to_sid(struct winbindd_cli_state *state)
{
        DEBUG(3, ("[%5lu]: uid to sid %lu\n", (unsigned long)state->pid, 
                  (unsigned long)state->request.data.uid));

        /* always go via the async interface (may block) */
        winbindd_uid2sid_async(state->mem_ctx, state->request.data.uid, uid2sid_recv, state);
}

/* Convert a gid to a sid */

static void gid2sid_recv(void *private_data, BOOL success, const char *sid)
{
        struct winbindd_cli_state *state =
                (struct winbindd_cli_state *)private_data;

        if (success) {
                DEBUG(10,("gid2sid: gid %lu has sid %s\n",
                          (unsigned long)(state->request.data.gid), sid));
                fstrcpy(state->response.data.sid.sid, sid);
                state->response.data.sid.type = SID_NAME_DOM_GRP;
                request_ok(state);
                return;
        }

        request_error(state);
        return;
}


void winbindd_gid_to_sid(struct winbindd_cli_state *state)
{
        DEBUG(3, ("[%5lu]: gid to sid %lu\n", (unsigned long)state->pid, 
                  (unsigned long)state->request.data.gid));

        /* always use async calls (may block) */
        winbindd_gid2sid_async(state->mem_ctx, state->request.data.gid, gid2sid_recv, state);
}

void winbindd_allocate_uid(struct winbindd_cli_state *state)
{
        if ( !state->privileged ) {
                DEBUG(2, ("winbindd_allocate_uid: non-privileged access "
                          "denied!\n"));
                request_error(state);
                return;
        }

        sendto_child(state, idmap_child());
}

enum winbindd_result winbindd_dual_allocate_uid(struct winbindd_domain *domain,
                                                struct winbindd_cli_state *state)
{
        struct unixid xid;

        if (!NT_STATUS_IS_OK(idmap_allocate_uid(&xid))) {
                return WINBINDD_ERROR;
        }
        state->response.data.uid = xid.id;
        return WINBINDD_OK;
}

void winbindd_allocate_gid(struct winbindd_cli_state *state)
{
        if ( !state->privileged ) {
                DEBUG(2, ("winbindd_allocate_gid: non-privileged access "
                          "denied!\n"));
                request_error(state);
                return;
        }

        sendto_child(state, idmap_child());
}

enum winbindd_result winbindd_dual_allocate_gid(struct winbindd_domain *domain,
                                                struct winbindd_cli_state *state)
{
        struct unixid xid;

        if (!NT_STATUS_IS_OK(idmap_allocate_gid(&xid))) {
                return WINBINDD_ERROR;
        }
        state->response.data.gid = xid.id;
        return WINBINDD_OK;
}

static void dump_maps_recv(void *private_data, BOOL success)
{
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);

        if (!success) {
                DEBUG(5, ("Could not dump maps\n"));
                request_error(state);
                return;
        }

        request_ok(state);
}

void winbindd_dump_maps(struct winbindd_cli_state *state)
{
        if ( ! state->privileged) {
                DEBUG(0, ("Only root is allowed to ask for an idmap dump!\n"));
                request_error(state);
                return;
        }

        DEBUG(3, ("[%5lu]: dump maps\n", (unsigned long)state->pid));

        winbindd_dump_maps_async(state->mem_ctx,
                        state->request.extra_data.data,
                        state->request.extra_len,
                        dump_maps_recv, state);
}

---