diff options
Diffstat (limited to 'source3/sam/idmap_tdb.c')
| -rw-r--r-- | source3/sam/idmap_tdb.c | 436 |
1 files changed, 246 insertions, 190 deletions
diff --git a/source3/sam/idmap_tdb.c b/source3/sam/idmap_tdb.c index 665c56d2f6..02a3178d61 100644 --- a/source3/sam/idmap_tdb.c +++ b/source3/sam/idmap_tdb.c @@ -6,6 +6,7 @@ Copyright (C) Tim Potter 2000 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003 Copyright (C) Simo Sorce 2003 + Copyright (C) Jeremy Allison 2006 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 @@ -46,16 +47,13 @@ static struct idmap_state { Allocate either a user or group id from the pool **********************************************************************/ -static NTSTATUS db_allocate_id(unid_t *id, int id_type) +static NTSTATUS db_allocate_id(unid_t *id, enum idmap_type id_type) { BOOL ret; int hwm; - if (!id) - return NT_STATUS_INVALID_PARAMETER; - /* Get current high water mark */ - switch (id_type & ID_TYPEMASK) { + switch (id_type) { case ID_USERID: if ((hwm = tdb_fetch_int32(idmap_tdb, HWM_USER)) == -1) { @@ -125,274 +123,327 @@ static NTSTATUS db_allocate_id(unid_t *id, int id_type) return NT_STATUS_OK; } -/* Get a sid from an id */ -static NTSTATUS internal_get_sid_from_id(DOM_SID *sid, unid_t id, int id_type) +/* Get a sid from an id - internal non-reverse map checking function. */ + +static NTSTATUS db_internal_get_sid_from_id(DOM_SID *sid, unid_t id, enum idmap_type id_type) { TDB_DATA key, data; - fstring keystr; + TALLOC_CTX *memctx; NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; - if (!sid) - return NT_STATUS_INVALID_PARAMETER; + if ((memctx = talloc_new(NULL)) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } - switch (id_type & ID_TYPEMASK) { + switch (id_type) { case ID_USERID: - slprintf(keystr, sizeof(keystr), "UID %lu", (unsigned long)id.uid); + key.dptr = talloc_asprintf(memctx, "UID %lu", (unsigned long)id.uid); break; case ID_GROUPID: - slprintf(keystr, sizeof(keystr), "GID %lu", (unsigned long)id.gid); + key.dptr = talloc_asprintf(memctx, "GID %lu", (unsigned long)id.gid); break; default: - return NT_STATUS_UNSUCCESSFUL; + ret = NT_STATUS_INVALID_PARAMETER; + goto done; + } + + if (key.dptr == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto done; } - key.dptr = keystr; - key.dsize = strlen(keystr) + 1; + key.dsize = strlen(key.dptr) + 1; - DEBUG(10,("internal_get_sid_from_id: fetching record %s\n", keystr )); + DEBUG(10,("db_internal_get_sid_from_id: fetching record %s\n", key.dptr)); data = tdb_fetch(idmap_tdb, key); if (data.dptr) { if (string_to_sid(sid, data.dptr)) { - DEBUG(10,("internal_get_sid_from_id: fetching record %s -> %s\n", keystr, data.dptr )); + DEBUG(10,("db_internal_get_sid_from_id: fetching record %s -> %s\n", key.dptr, data.dptr )); ret = NT_STATUS_OK; } SAFE_FREE(data.dptr); } +done: + talloc_free(memctx); return ret; } -/* Error codes for get_id_from_sid */ -enum getidfromsiderr { GET_ID_FROM_SID_OK = 0, GET_ID_FROM_SID_NOTFOUND, GET_ID_FROM_SID_WRONG_TYPE, GET_ID_FROM_SID_ERR }; +/* Get an id from a sid - internal non-reverse map checking function. */ -static enum getidfromsiderr internal_get_id_from_sid(unid_t *id, int *id_type, const DOM_SID *sid) +static NTSTATUS db_internal_get_id_from_sid(unid_t *id, enum idmap_type *id_type, const DOM_SID *sid) { - enum getidfromsiderr ret = GET_ID_FROM_SID_ERR; - fstring keystr; + NTSTATUS ret; TDB_DATA key, data; - int type = *id_type & ID_TYPEMASK; + TALLOC_CTX *memctx; + unsigned long rec_id; + + if ((memctx = talloc_new(NULL)) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } /* Check if sid is present in database */ - sid_to_string(keystr, sid); + if ((key.dptr = talloc_asprintf(memctx, "%s", sid_string_static(sid))) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto done; + } - key.dptr = keystr; - key.dsize = strlen(keystr) + 1; + key.dsize = strlen(key.dptr) + 1; - DEBUG(10,("internal_get_id_from_sid: fetching record %s of type 0x%x\n", keystr, type )); + DEBUG(10,("db_internal_get_id_from_sid: fetching record %s\n", key.dptr)); data = tdb_fetch(idmap_tdb, key); if (!data.dptr) { - DEBUG(10,("internal_get_id_from_sid: record %s not found\n", keystr )); - return GET_ID_FROM_SID_NOTFOUND; + DEBUG(10,("db_internal_get_id_from_sid: record %s not found\n", key.dptr)); + ret = NT_STATUS_NO_SUCH_USER; + goto done; } else { - DEBUG(10,("internal_get_id_from_sid: record %s -> %s\n", keystr, data.dptr )); + DEBUG(10,("db_internal_get_id_from_sid: record %s -> %s\n", key.dptr, data.dptr)); } - if (type == ID_EMPTY || type == ID_USERID) { - fstring scanstr; - /* Parse and return existing uid */ - fstrcpy(scanstr, "UID %d"); - - if (sscanf(data.dptr, scanstr, &((*id).uid)) == 1) { - /* uid ok? */ - if (type == ID_EMPTY) { - *id_type = ID_USERID; - } - DEBUG(10,("internal_get_id_from_sid: %s fetching record %s -> %s \n", - (type == ID_EMPTY) ? "ID_EMPTY" : "ID_USERID", - keystr, data.dptr )); - ret = GET_ID_FROM_SID_OK; - } else { - ret = GET_ID_FROM_SID_WRONG_TYPE; - } - } - - if ((ret != GET_ID_FROM_SID_OK) && (type == ID_EMPTY || type == ID_GROUPID)) { - fstring scanstr; - /* Parse and return existing gid */ - fstrcpy(scanstr, "GID %d"); - - if (sscanf(data.dptr, scanstr, &((*id).gid)) == 1) { - /* gid ok? */ - if (type == ID_EMPTY) { - *id_type = ID_GROUPID; - } - DEBUG(10,("internal_get_id_from_sid: %s fetching record %s -> %s \n", - (type == ID_EMPTY) ? "ID_EMPTY" : "ID_GROUPID", - keystr, data.dptr )); - ret = GET_ID_FROM_SID_OK; - } else { - ret = GET_ID_FROM_SID_WRONG_TYPE; - } + /* What type of record is this ? */ + + /* Try and parse and return a uid */ + if (sscanf(data.dptr, "UID %lu", &rec_id) == 1) { + id->uid = (uid_t)rec_id; + *id_type = ID_USERID; + DEBUG(10,("db_internal_get_id_from_sid: fetching uid record %s -> %s \n", + key.dptr, data.dptr )); + ret = NT_STATUS_OK; + } else if (sscanf(data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */ + id->gid = (uid_t)rec_id; + *id_type = ID_GROUPID; + DEBUG(10,("db_internal_get_id_from_sid: fetching gid record %s -> %s \n", + key.dptr, data.dptr )); + ret = NT_STATUS_OK; + } else { + /* Unknown record type ! */ + ret = NT_STATUS_INTERNAL_DB_ERROR; } SAFE_FREE(data.dptr); +done: + talloc_free(memctx); return ret; } -/* Get a sid from an id */ -static NTSTATUS db_get_sid_from_id(DOM_SID *sid, unid_t id, int id_type_in) +/* Get a sid from an id - internal non-reverse map checking function. */ + +static NTSTATUS db_get_sid_from_id(DOM_SID *sid, unid_t id, enum idmap_type id_type, int flags) { - NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; - enum getidfromsiderr iderr; - int id_type = id_type_in & ID_TYPEMASK; - unid_t id_tmp = id; - int id_type_tmp = id_type; + NTSTATUS ret; + unid_t tmp_id; + enum idmap_type tmp_id_type; - DEBUG(10,("db_get_sid_from_id: id_type_in = 0x%x\n", id_type_in)); + ret = db_internal_get_sid_from_id(sid, id, id_type); - ret = internal_get_sid_from_id(sid, id, id_type); if (!NT_STATUS_IS_OK(ret)) { return ret; } - - iderr = internal_get_id_from_sid(&id_tmp, &id_type_tmp, sid); - if (iderr != GET_ID_FROM_SID_OK) { - return NT_STATUS_UNSUCCESSFUL; - } - if (id_type_tmp != id_type) { - return NT_STATUS_UNSUCCESSFUL; - } else if (id_type == ID_USERID) { - if (id_tmp.uid != id.uid) { - return NT_STATUS_UNSUCCESSFUL; - } - } else if (id_type == ID_GROUPID) { - if (id_tmp.gid != id.gid) { - return NT_STATUS_UNSUCCESSFUL; + + /* Ensure the reverse mapping exists. */ + + ret = db_internal_get_id_from_sid(&tmp_id, &tmp_id_type, sid); + if (NT_STATUS_IS_OK(ret)) { + /* Check the reverse mapping is the same. */ + if (tmp_id.uid != id.uid || tmp_id_type != id_type) { + DEBUG(10,("db_get_sid_from_id: reverse mapping mismatch " + "tmp_id = %u, id = %u, tmp_id_type = %u, id_type = %u\n", + (unsigned int)tmp_id.uid, (unsigned int)id.uid, + (unsigned int)tmp_id_type, (unsigned int)id_type )); + return NT_STATUS_NO_SUCH_USER; } - } else { - return NT_STATUS_UNSUCCESSFUL; } + return ret; } -/* Get an id from a sid */ -static NTSTATUS db_get_id_from_sid(unid_t *id, int *id_type, const DOM_SID *sid) + +/*********************************************************************** + Why is this function internal and not part of the interface ????? + This *sucks* and is bad design and needs fixing. JRA. +***********************************************************************/ + +static NTSTATUS db_internal_allocate_new_id_for_sid(unid_t *id, enum idmap_type *id_type, const DOM_SID *sid) { NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; - enum getidfromsiderr iderr; + TDB_DATA sid_data; + TDB_DATA ugid_data; + TALLOC_CTX *memctx; + + if ((memctx = talloc_new(NULL)) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } - DEBUG(10,("db_get_id_from_sid\n")); + if ((sid_data.dptr = talloc_asprintf(memctx, "%s", sid_string_static(sid))) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + talloc_free(memctx); + return NT_STATUS_NO_MEMORY; + } - if (!sid || !id || !id_type) - return NT_STATUS_INVALID_PARAMETER; + sid_data.dsize = strlen(sid_data.dptr) + 1; - iderr = internal_get_id_from_sid(id, id_type, sid); - if (iderr == GET_ID_FROM_SID_OK) { - DOM_SID sid_tmp; - ret = internal_get_sid_from_id(&sid_tmp, *id, *id_type); - if (NT_STATUS_IS_OK(ret)) { - if (!sid_equal(&sid_tmp, sid)) { - return NT_STATUS_UNSUCCESSFUL; - } - } - } else if (iderr == GET_ID_FROM_SID_WRONG_TYPE) { - /* We found a record but not the type we wanted. - * This is an error, not an opportunity to overwrite... - * JRA. - */ + /* Lock the record for this SID. */ + if (tdb_chainlock(idmap_tdb, sid_data) != 0) { + DEBUG(10,("db_internal_allocate_new_id_for_sid: failed to lock record %s. Error %s\n", + sid_data.dptr, tdb_errorstr(idmap_tdb) )); + talloc_free(memctx); return NT_STATUS_UNSUCCESSFUL; } - if (!(*id_type & ID_QUERY_ONLY) && (iderr != GET_ID_FROM_SID_OK) && - (((*id_type & ID_TYPEMASK) == ID_USERID) - || (*id_type & ID_TYPEMASK) == ID_GROUPID)) { - TDB_DATA sid_data; - TDB_DATA ugid_data; - fstring sid_string; - - sid_to_string(sid_string, sid); - - sid_data.dptr = sid_string; - sid_data.dsize = strlen(sid_string)+1; - - /* Lock the record for this SID. */ - if (tdb_chainlock(idmap_tdb, sid_data) != 0) { - DEBUG(10,("db_get_id_from_sid: failed to lock record %s. Error %s\n", - sid_string, tdb_errorstr(idmap_tdb) )); - return NT_STATUS_UNSUCCESSFUL; + do { + /* Allocate a new id for this sid */ + ret = db_allocate_id(id, *id_type); + if (!NT_STATUS_IS_OK(ret)) { + goto done; + } + + /* Store the UID side */ + /* Store new id */ + if (*id_type == ID_USERID) { + ugid_data.dptr = talloc_asprintf(memctx, "UID %lu", + (unsigned long)((*id).uid)); + } else { + ugid_data.dptr = talloc_asprintf(memctx, "GID %lu", + (unsigned long)((*id).gid)); } - do { - fstring ugid_str; + if (ugid_data.dptr == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto done; + } - /* Allocate a new id for this sid */ - ret = db_allocate_id(id, *id_type); - if (!NT_STATUS_IS_OK(ret)) - break; + ugid_data.dsize = strlen(ugid_data.dptr) + 1; - /* Store the UID side */ - /* Store new id */ - if (*id_type & ID_USERID) { - slprintf(ugid_str, sizeof(ugid_str), "UID %lu", - (unsigned long)((*id).uid)); - } else { - slprintf(ugid_str, sizeof(ugid_str), "GID %lu", - (unsigned long)((*id).gid)); - } - - ugid_data.dptr = ugid_str; - ugid_data.dsize = strlen(ugid_str) + 1; + DEBUG(10,("db_internal_allocate_new_id_for_sid: storing %s -> %s\n", + ugid_data.dptr, sid_data.dptr )); - DEBUG(10,("db_get_id_from_sid: storing %s -> %s\n", - ugid_data.dptr, sid_data.dptr )); + if (tdb_store(idmap_tdb, ugid_data, sid_data, TDB_INSERT) != -1) { + ret = NT_STATUS_OK; + break; + } + if (tdb_error(idmap_tdb) != TDB_ERR_EXISTS) { + DEBUG(10,("db_internal_allocate_new_id_for_sid: error %s\n", tdb_errorstr(idmap_tdb))); + } + + ret = NT_STATUS_INTERNAL_DB_ERROR; - if (tdb_store(idmap_tdb, ugid_data, sid_data, TDB_INSERT) != -1) { - ret = NT_STATUS_OK; - break; - } - if (tdb_error(idmap_tdb) != TDB_ERR_EXISTS) - DEBUG(10,("db_get_id_from_sid: error %s\n", tdb_errorstr(idmap_tdb) )); - ret = NT_STATUS_UNSUCCESSFUL; - } while (tdb_error(idmap_tdb) == TDB_ERR_EXISTS); + } while (tdb_error(idmap_tdb) == TDB_ERR_EXISTS); - if (NT_STATUS_IS_OK(ret)) { + if (NT_STATUS_IS_OK(ret)) { + DEBUG(10,("db_internal_allocate_new_id_for_sid: storing %s -> %s\n", + sid_data.dptr, ugid_data.dptr )); - DEBUG(10,("db_get_id_from_sid: storing %s -> %s\n", - sid_data.dptr, ugid_data.dptr )); + if (tdb_store(idmap_tdb, sid_data, ugid_data, TDB_REPLACE) == -1) { + DEBUG(10,("db_internal_allocate_new_id_for_sid: error %s\n", tdb_errorstr(idmap_tdb) )); + ret = NT_STATUS_INTERNAL_DB_ERROR; + } + } - if (tdb_store(idmap_tdb, sid_data, ugid_data, TDB_REPLACE) == -1) { - DEBUG(10,("db_get_id_from_sid: error %s\n", tdb_errorstr(idmap_tdb) )); - /* TODO: print tdb error !! */ - tdb_chainunlock(idmap_tdb, sid_data); - return NT_STATUS_UNSUCCESSFUL; + done: + + tdb_chainunlock(idmap_tdb, sid_data); + talloc_free(memctx); + + return ret; +} + +/*********************************************************************** + Get an id from a sid - urg. This is assuming the *output* parameter id_type + has been initialized with the correct needed type - ID_USERID or ID_GROUPID. + This function also allocates new mappings ! WTF ?????? + This *sucks* and is bad design and needs fixing. JRA. +***********************************************************************/ + +static NTSTATUS db_get_id_from_sid(unid_t *id, enum idmap_type *id_type, const DOM_SID *sid, int flags) +{ + NTSTATUS ret = NT_STATUS_UNSUCCESSFUL; + enum idmap_type tmp_id_type = *id_type; + + DEBUG(10,("db_get_id_from_sid %s\n", sid_string_static(sid))); + + ret = db_internal_get_id_from_sid(id, &tmp_id_type, sid); + + if (NT_STATUS_IS_OK(ret)) { + DOM_SID sid_tmp; + + /* Check the reverse mapping is the same. Remember *id_type was set as a parameter + to this call... */ + if (tmp_id_type != *id_type) { + DEBUG(10,("db_get_sid_from_id: sid %s reverse mapping mismatch " + "tmp_id_type = %u, id_type = %u\n", + sid_string_static(sid), + (unsigned int)tmp_id_type, (unsigned int)(*id_type) )); + return NT_STATUS_NO_SUCH_USER; + } + + ret = db_internal_get_sid_from_id(&sid_tmp, *id, *id_type); + if (NT_STATUS_IS_OK(ret)) { + if (!sid_equal(&sid_tmp, sid)) { + DEBUG(10,("db_get_sid_from_id: sid %s reverse mapping SID mismatch" + "id = %u, id_type = %u\n", + sid_string_static(sid), + (unsigned int)id->uid, (unsigned int)(*id_type) )); + return NT_STATUS_NO_SUCH_USER; } } + return ret; + } - tdb_chainunlock(idmap_tdb, sid_data); + if (flags & IDMAP_FLAG_QUERY_ONLY) { + return ret; } - - return ret; + + /* We're in to bad design territory.... This call is now + *allocating* and storing a new mapping for sid -> id. This SHOULD + NOT BE DONE HERE ! There needs to be a separate upper + level call for this... I think the reason this was badly + designed this way was the desire to reuse cache code with + a tdb idmap implementation. They MUST be separated ! JRA */ + + return db_internal_allocate_new_id_for_sid(id, id_type, sid); } -static NTSTATUS db_set_mapping(const DOM_SID *sid, unid_t id, int id_type) +static NTSTATUS db_set_mapping(const DOM_SID *sid, unid_t id, enum idmap_type id_type) { + NTSTATUS ret; TDB_DATA ksid, kid, data; - fstring ksidstr; - fstring kidstr; + TALLOC_CTX *memctx; - DEBUG(10,("db_set_mapping: id_type = 0x%x\n", id_type)); + DEBUG(10,("db_set_mapping: id_type = 0x%x\n", (unsigned int)id_type)); - if (!sid) - return NT_STATUS_INVALID_PARAMETER; - - sid_to_string(ksidstr, sid); + if ((memctx = talloc_new(NULL)) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + return NT_STATUS_NO_MEMORY; + } - ksid.dptr = ksidstr; - ksid.dsize = strlen(ksidstr) + 1; + if ((ksid.dptr = talloc_asprintf(memctx, "%s", sid_string_static(sid))) == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto done; + } + ksid.dsize = strlen(ksid.dptr) + 1; - if (id_type & ID_USERID) { - slprintf(kidstr, sizeof(kidstr), "UID %lu", (unsigned long)id.uid); - } else if (id_type & ID_GROUPID) { - slprintf(kidstr, sizeof(kidstr), "GID %lu", (unsigned long)id.gid); + if (id_type == ID_USERID) { + kid.dptr = talloc_asprintf(memctx, "UID %lu", (unsigned long)id.uid); } else { - return NT_STATUS_INVALID_PARAMETER; + kid.dptr = talloc_asprintf(memctx, "GID %lu", (unsigned long)id.gid); } - kid.dptr = kidstr; - kid.dsize = strlen(kidstr) + 1; + if (kid.dptr == NULL) { + DEBUG(0, ("ERROR: Out of memory!\n")); + ret = NT_STATUS_NO_MEMORY; + goto done; + } + kid.dsize = strlen(kid.dptr) + 1; /* *DELETE* prevoius mappings if any. * This is done both SID and [U|G]ID passed in */ @@ -400,7 +451,7 @@ static NTSTATUS db_set_mapping(const DOM_SID *sid, unid_t id, int id_type) /* Lock the record for this SID. */ if (tdb_chainlock(idmap_tdb, ksid) != 0) { DEBUG(10,("db_set_mapping: failed to lock record %s. Error %s\n", - ksidstr, tdb_errorstr(idmap_tdb) )); + ksid.dptr, tdb_errorstr(idmap_tdb) )); return NT_STATUS_UNSUCCESSFUL; } @@ -424,24 +475,29 @@ static NTSTATUS db_set_mapping(const DOM_SID *sid, unid_t id, int id_type) if (tdb_store(idmap_tdb, ksid, kid, TDB_INSERT) == -1) { DEBUG(0, ("idb_set_mapping: tdb_store 1 error: %s\n", tdb_errorstr(idmap_tdb))); tdb_chainunlock(idmap_tdb, ksid); - return NT_STATUS_UNSUCCESSFUL; + ret = NT_STATUS_UNSUCCESSFUL; + goto done; } if (tdb_store(idmap_tdb, kid, ksid, TDB_INSERT) == -1) { DEBUG(0, ("idb_set_mapping: tdb_store 2 error: %s\n", tdb_errorstr(idmap_tdb))); tdb_chainunlock(idmap_tdb, ksid); - return NT_STATUS_UNSUCCESSFUL; + ret = NT_STATUS_UNSUCCESSFUL; + goto done; } tdb_chainunlock(idmap_tdb, ksid); DEBUG(10,("db_set_mapping: stored %s -> %s and %s -> %s\n", ksid.dptr, kid.dptr, kid.dptr, ksid.dptr )); - return NT_STATUS_OK; + ret = NT_STATUS_OK; +done: + talloc_free(memctx); + return ret; } /***************************************************************************** Initialise idmap database. *****************************************************************************/ -static NTSTATUS db_idmap_init( char *params ) +static NTSTATUS db_idmap_init( const char *params ) { SMB_STRUCT_STAT stbuf; char *tdbfile = NULL; |