diff options
Diffstat (limited to 'source3/winbindd/winbindd_sid.c')
| -rw-r--r-- | source3/winbindd/winbindd_sid.c | 612 |
1 files changed, 612 insertions, 0 deletions
diff --git a/source3/winbindd/winbindd_sid.c b/source3/winbindd/winbindd_sid.c new file mode 100644 index 0000000000..274786fa63 --- /dev/null +++ b/source3/winbindd/winbindd_sid.c @@ -0,0 +1,612 @@ +/* + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#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, WINBINDD_LOOKUPNAME, + 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_fstring(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); +} + +/* 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); + struct dom_sid sid; + + string_to_sid(&sid, state->request.data.sid); + + 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 (!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; + } + + if (!success) { + DEBUG(5, ("sid2uid_lookupsid_recv Could not convert get sid type for %s\n", + state->request.data.sid)); + goto fail; + } + + 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)); + goto fail; + } + + /* always use the async interface (may block) */ + winbindd_sid2uid_async(state->mem_ctx, &sid, sid2uid_recv, state); + return; + + fail: + /* + * We have to set the cache ourselves here, the child which is + * normally responsible was not queried yet. + */ + idmap_cache_set_sid2uid(&sid, -1); + request_error(state); + return; +} + +void winbindd_sid_to_uid(struct winbindd_cli_state *state) +{ + DOM_SID sid; + uid_t uid; + bool expired; + + /* 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; + } + + if (idmap_cache_find_sid2uid(&sid, &uid, &expired)) { + DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n", + (int)uid, expired ? " (expired)": "")); + if (expired && IS_DOMAIN_ONLINE(find_our_domain())) { + DEBUG(10, ("revalidating expired entry\n")); + goto backend; + } + if (uid == -1) { + DEBUG(10, ("Returning negative cache entry\n")); + request_error(state); + return; + } + DEBUG(10, ("Returning positive cache entry\n")); + state->response.data.uid = uid; + request_ok(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. */ + + backend: + 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); + struct dom_sid sid; + + string_to_sid(&sid, state->request.data.sid); + + 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 (!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; + } + + if (!success) { + DEBUG(5, ("sid2gid_lookupsid_recv: Could not get sid type for %s\n", + state->request.data.sid)); + goto fail; + } + + 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)); + goto fail; + } + + /* always use the async interface (may block) */ + winbindd_sid2gid_async(state->mem_ctx, &sid, sid2gid_recv, state); + return; + + fail: + /* + * We have to set the cache ourselves here, the child which is + * normally responsible was not queried yet. + */ + idmap_cache_set_sid2gid(&sid, -1); + request_error(state); + return; +} + +void winbindd_sid_to_gid(struct winbindd_cli_state *state) +{ + DOM_SID sid; + gid_t gid; + bool expired; + + /* 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; + } + + if (idmap_cache_find_sid2gid(&sid, &gid, &expired)) { + DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n", + (int)gid, expired ? " (expired)": "")); + if (expired && IS_DOMAIN_ONLINE(find_our_domain())) { + DEBUG(10, ("revalidating expired entry\n")); + goto backend; + } + if (gid == -1) { + DEBUG(10, ("Returning negative cache entry\n")); + request_error(state); + return; + } + DEBUG(10, ("Returning positive cache entry\n")); + state->response.data.gid = gid; + request_ok(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. */ + + backend: + winbindd_lookupsid_async( state->mem_ctx, &sid, sid2gid_lookupsid_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 *sidstr) +{ + struct winbindd_cli_state *state = + (struct winbindd_cli_state *)private_data; + struct dom_sid sid; + + if (!success || !string_to_sid(&sid, sidstr)) { + ZERO_STRUCT(sid); + idmap_cache_set_sid2uid(&sid, state->request.data.uid); + request_error(state); + return; + } + + DEBUG(10,("uid2sid: uid %lu has sid %s\n", + (unsigned long)(state->request.data.uid), sidstr)); + + idmap_cache_set_sid2uid(&sid, state->request.data.uid); + fstrcpy(state->response.data.sid.sid, sidstr); + state->response.data.sid.type = SID_NAME_USER; + request_ok(state); + return; +} + +void winbindd_uid_to_sid(struct winbindd_cli_state *state) +{ + struct dom_sid sid; + bool expired; + + DEBUG(3, ("[%5lu]: uid to sid %lu\n", (unsigned long)state->pid, + (unsigned long)state->request.data.uid)); + + if (idmap_cache_find_uid2sid(state->request.data.uid, &sid, + &expired)) { + DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n", + (int)state->request.data.uid, + expired ? " (expired)": "")); + if (expired && IS_DOMAIN_ONLINE(find_our_domain())) { + DEBUG(10, ("revalidating expired entry\n")); + goto backend; + } + if (is_null_sid(&sid)) { + DEBUG(10, ("Returning negative cache entry\n")); + request_error(state); + return; + } + DEBUG(10, ("Returning positive cache entry\n")); + sid_to_fstring(state->response.data.sid.sid, &sid); + request_ok(state); + return; + } + + /* always go via the async interface (may block) */ + backend: + 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 *sidstr) +{ + struct winbindd_cli_state *state = + (struct winbindd_cli_state *)private_data; + struct dom_sid sid; + + if (!success || !string_to_sid(&sid, sidstr)) { + ZERO_STRUCT(sid); + idmap_cache_set_sid2gid(&sid, state->request.data.gid); + request_error(state); + return; + } + DEBUG(10,("gid2sid: gid %lu has sid %s\n", + (unsigned long)(state->request.data.gid), sidstr)); + + idmap_cache_set_sid2gid(&sid, state->request.data.gid); + fstrcpy(state->response.data.sid.sid, sidstr); + state->response.data.sid.type = SID_NAME_DOM_GRP; + request_ok(state); + return; +} + + +void winbindd_gid_to_sid(struct winbindd_cli_state *state) +{ + struct dom_sid sid; + bool expired; + + DEBUG(3, ("[%5lu]: gid to sid %lu\n", (unsigned long)state->pid, + (unsigned long)state->request.data.gid)); + + if (idmap_cache_find_gid2sid(state->request.data.gid, &sid, + &expired)) { + DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n", + (int)state->request.data.gid, + expired ? " (expired)": "")); + if (expired && IS_DOMAIN_ONLINE(find_our_domain())) { + DEBUG(10, ("revalidating expired entry\n")); + goto backend; + } + if (is_null_sid(&sid)) { + DEBUG(10, ("Returning negative cache entry\n")); + request_error(state); + return; + } + DEBUG(10, ("Returning positive cache entry\n")); + sid_to_fstring(state->response.data.sid.sid, &sid); + request_ok(state); + return; + } + + /* always use async calls (may block) */ + backend: + 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; +} |