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-rw-r--r--source3/winbindd/idmap_ldap.c1141
1 files changed, 1141 insertions, 0 deletions
diff --git a/source3/winbindd/idmap_ldap.c b/source3/winbindd/idmap_ldap.c
new file mode 100644
index 0000000..36ab94b
--- /dev/null
+++ b/source3/winbindd/idmap_ldap.c
@@ -0,0 +1,1141 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ idmap LDAP backend
+
+ Copyright (C) Tim Potter 2000
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+ Copyright (C) Gerald Carter 2003
+ Copyright (C) Simo Sorce 2003-2007
+ Copyright (C) Michael Adam 2010
+
+ 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"
+#include "secrets.h"
+#include "idmap.h"
+#include "idmap_rw.h"
+#include "../libcli/security/security.h"
+#include "lib/util/smb_strtox.h"
+#include "lib/global_contexts.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_IDMAP
+
+#include <lber.h>
+#include <ldap.h>
+
+#include "smbldap.h"
+#include "passdb/pdb_ldap_schema.h"
+
+struct idmap_ldap_context {
+ struct smbldap_state *smbldap_state;
+ char *url;
+ char *suffix;
+ char *user_dn;
+ bool anon;
+ struct idmap_rw_ops *rw_ops;
+};
+
+#define CHECK_ALLOC_DONE(mem) do { \
+ if (!mem) { \
+ DEBUG(0, ("Out of memory!\n")); \
+ ret = NT_STATUS_NO_MEMORY; \
+ goto done; \
+ } } while (0)
+
+/**********************************************************************
+ IDMAP ALLOC TDB BACKEND
+**********************************************************************/
+
+/*********************************************************************
+ ********************************************************************/
+
+static NTSTATUS get_credentials( TALLOC_CTX *mem_ctx,
+ struct smbldap_state *ldap_state,
+ struct idmap_domain *dom,
+ char **dn )
+{
+ NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
+ char *secret = NULL;
+ const char *tmp = NULL;
+ char *user_dn = NULL;
+ bool anon = False;
+
+ /* assume anonymous if we don't have a specified user */
+
+ tmp = idmap_config_const_string(dom->name, "ldap_user_dn", NULL);
+
+ if ( tmp ) {
+ secret = idmap_fetch_secret("ldap", dom->name, tmp);
+ if (!secret) {
+ DEBUG(0, ("get_credentials: Unable to fetch "
+ "auth credentials for %s in %s\n",
+ tmp, (dom==NULL)?"ALLOC":dom->name));
+ ret = NT_STATUS_ACCESS_DENIED;
+ goto done;
+ }
+ *dn = talloc_strdup(mem_ctx, tmp);
+ CHECK_ALLOC_DONE(*dn);
+ } else {
+ if (!fetch_ldap_pw(&user_dn, &secret)) {
+ DEBUG(2, ("get_credentials: Failed to lookup ldap "
+ "bind creds. Using anonymous connection.\n"));
+ anon = True;
+ *dn = NULL;
+ } else {
+ *dn = talloc_strdup(mem_ctx, user_dn);
+ SAFE_FREE( user_dn );
+ CHECK_ALLOC_DONE(*dn);
+ }
+ }
+
+ smbldap_set_creds(ldap_state, anon, *dn, secret);
+ ret = NT_STATUS_OK;
+
+done:
+ SAFE_FREE(secret);
+
+ return ret;
+}
+
+
+/**********************************************************************
+ Verify the sambaUnixIdPool entry in the directory.
+**********************************************************************/
+
+static NTSTATUS verify_idpool(struct idmap_domain *dom)
+{
+ NTSTATUS ret;
+ TALLOC_CTX *mem_ctx;
+ LDAPMessage *result = NULL;
+ LDAPMod **mods = NULL;
+ const char **attr_list;
+ char *filter;
+ int count;
+ int rc;
+ struct idmap_ldap_context *ctx;
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ mem_ctx = talloc_new(ctx);
+ if (mem_ctx == NULL) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ filter = talloc_asprintf(mem_ctx, "(objectclass=%s)", LDAP_OBJ_IDPOOL);
+ CHECK_ALLOC_DONE(filter);
+
+ attr_list = get_attr_list(mem_ctx, idpool_attr_list);
+ CHECK_ALLOC_DONE(attr_list);
+
+ rc = smbldap_search(ctx->smbldap_state,
+ ctx->suffix,
+ LDAP_SCOPE_SUBTREE,
+ filter,
+ attr_list,
+ 0,
+ &result);
+
+ if (rc != LDAP_SUCCESS) {
+ DEBUG(1, ("Unable to verify the idpool, "
+ "cannot continue initialization!\n"));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ count = ldap_count_entries(smbldap_get_ldap(ctx->smbldap_state),
+ result);
+
+ ldap_msgfree(result);
+
+ if ( count > 1 ) {
+ DEBUG(0,("Multiple entries returned from %s (base == %s)\n",
+ filter, ctx->suffix));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+ else if (count == 0) {
+ char *uid_str, *gid_str;
+
+ uid_str = talloc_asprintf(mem_ctx, "%lu",
+ (unsigned long)dom->low_id);
+ gid_str = talloc_asprintf(mem_ctx, "%lu",
+ (unsigned long)dom->low_id);
+
+ smbldap_set_mod(&mods, LDAP_MOD_ADD,
+ "objectClass", LDAP_OBJ_IDPOOL);
+ smbldap_set_mod(&mods, LDAP_MOD_ADD,
+ get_attr_key2string(idpool_attr_list,
+ LDAP_ATTR_UIDNUMBER),
+ uid_str);
+ smbldap_set_mod(&mods, LDAP_MOD_ADD,
+ get_attr_key2string(idpool_attr_list,
+ LDAP_ATTR_GIDNUMBER),
+ gid_str);
+ if (mods) {
+ rc = smbldap_modify(ctx->smbldap_state,
+ ctx->suffix,
+ mods);
+ ldap_mods_free(mods, True);
+ } else {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+ }
+
+ ret = (rc == LDAP_SUCCESS)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
+done:
+ talloc_free(mem_ctx);
+ return ret;
+}
+
+/********************************
+ Allocate a new uid or gid
+********************************/
+
+static NTSTATUS idmap_ldap_allocate_id_internal(struct idmap_domain *dom,
+ struct unixid *xid)
+{
+ TALLOC_CTX *mem_ctx;
+ NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
+ int rc = LDAP_SERVER_DOWN;
+ int count = 0;
+ LDAPMessage *result = NULL;
+ LDAPMessage *entry = NULL;
+ LDAPMod **mods = NULL;
+ char *id_str;
+ char *new_id_str;
+ char *filter = NULL;
+ const char *dn = NULL;
+ const char **attr_list;
+ const char *type;
+ struct idmap_ldap_context *ctx;
+ int error = 0;
+
+ /* Only do query if we are online */
+ if (idmap_is_offline()) {
+ return NT_STATUS_FILE_IS_OFFLINE;
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ mem_ctx = talloc_new(ctx);
+ if (!mem_ctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* get type */
+ switch (xid->type) {
+
+ case ID_TYPE_UID:
+ type = get_attr_key2string(idpool_attr_list,
+ LDAP_ATTR_UIDNUMBER);
+ break;
+
+ case ID_TYPE_GID:
+ type = get_attr_key2string(idpool_attr_list,
+ LDAP_ATTR_GIDNUMBER);
+ break;
+
+ case ID_TYPE_BOTH:
+ /*
+ * This is not supported here yet and
+ * already handled in idmap_rw_new_mapping()
+ */
+ FALL_THROUGH;
+ case ID_TYPE_NOT_SPECIFIED:
+ /*
+ * This is handled in idmap_rw_new_mapping()
+ */
+ FALL_THROUGH;
+ default:
+ DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ filter = talloc_asprintf(mem_ctx, "(objectClass=%s)", LDAP_OBJ_IDPOOL);
+ CHECK_ALLOC_DONE(filter);
+
+ attr_list = get_attr_list(mem_ctx, idpool_attr_list);
+ CHECK_ALLOC_DONE(attr_list);
+
+ DEBUG(10, ("Search of the id pool (filter: %s)\n", filter));
+
+ rc = smbldap_search(ctx->smbldap_state,
+ ctx->suffix,
+ LDAP_SCOPE_SUBTREE, filter,
+ attr_list, 0, &result);
+
+ if (rc != LDAP_SUCCESS) {
+ DEBUG(0,("%s object not found\n", LDAP_OBJ_IDPOOL));
+ goto done;
+ }
+
+ smbldap_talloc_autofree_ldapmsg(mem_ctx, result);
+
+ count = ldap_count_entries(smbldap_get_ldap(ctx->smbldap_state),
+ result);
+ if (count != 1) {
+ DEBUG(0,("Single %s object not found\n", LDAP_OBJ_IDPOOL));
+ goto done;
+ }
+
+ entry = ldap_first_entry(smbldap_get_ldap(ctx->smbldap_state), result);
+
+ dn = smbldap_talloc_dn(mem_ctx,
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry);
+ if ( ! dn) {
+ goto done;
+ }
+
+ id_str = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, type, mem_ctx);
+ if (id_str == NULL) {
+ DEBUG(0,("%s attribute not found\n", type));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ xid->id = smb_strtoul(id_str, NULL, 10, &error, SMB_STR_STANDARD);
+ if (error != 0) {
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ /* make sure we still have room to grow */
+
+ switch (xid->type) {
+ case ID_TYPE_UID:
+ if (xid->id > dom->high_id) {
+ DEBUG(0,("Cannot allocate uid above %lu!\n",
+ (unsigned long)dom->high_id));
+ goto done;
+ }
+ break;
+
+ case ID_TYPE_GID:
+ if (xid->id > dom->high_id) {
+ DEBUG(0,("Cannot allocate gid above %lu!\n",
+ (unsigned long)dom->high_id));
+ goto done;
+ }
+ break;
+
+ default:
+ /* impossible */
+ goto done;
+ }
+
+ new_id_str = talloc_asprintf(mem_ctx, "%lu", (unsigned long)xid->id + 1);
+ if ( ! new_id_str) {
+ DEBUG(0,("Out of memory\n"));
+ ret = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ smbldap_set_mod(&mods, LDAP_MOD_DELETE, type, id_str);
+ smbldap_set_mod(&mods, LDAP_MOD_ADD, type, new_id_str);
+
+ if (mods == NULL) {
+ DEBUG(0,("smbldap_set_mod() failed.\n"));
+ goto done;
+ }
+
+ DEBUG(10, ("Try to atomically increment the id (%s -> %s)\n",
+ id_str, new_id_str));
+
+ rc = smbldap_modify(ctx->smbldap_state, dn, mods);
+
+ ldap_mods_free(mods, True);
+
+ if (rc != LDAP_SUCCESS) {
+ DEBUG(1,("Failed to allocate new %s. "
+ "smbldap_modify() failed.\n", type));
+ goto done;
+ }
+
+ ret = NT_STATUS_OK;
+
+done:
+ talloc_free(mem_ctx);
+ return ret;
+}
+
+/**
+ * Allocate a new unix-ID.
+ * For now this is for the default idmap domain only.
+ * Should be extended later on.
+ */
+static NTSTATUS idmap_ldap_allocate_id(struct idmap_domain *dom,
+ struct unixid *id)
+{
+ NTSTATUS ret;
+
+ if (!strequal(dom->name, "*")) {
+ DEBUG(3, ("idmap_ldap_allocate_id: "
+ "Refusing allocation of a new unixid for domain'%s'. "
+ "This is only supported for the default "
+ "domain \"*\".\n",
+ dom->name));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ ret = idmap_ldap_allocate_id_internal(dom, id);
+
+ return ret;
+}
+
+
+/**********************************************************************
+ IDMAP MAPPING LDAP BACKEND
+**********************************************************************/
+
+static int idmap_ldap_close_destructor(struct idmap_ldap_context *ctx)
+{
+ smbldap_free_struct(&ctx->smbldap_state);
+ DEBUG(5,("The connection to the LDAP server was closed\n"));
+ /* maybe free the results here --metze */
+
+ return 0;
+}
+
+/********************************
+ Initialise idmap database.
+********************************/
+
+static NTSTATUS idmap_ldap_set_mapping(struct idmap_domain *dom,
+ const struct id_map *map);
+
+static NTSTATUS idmap_ldap_db_init(struct idmap_domain *dom)
+{
+ NTSTATUS ret;
+ struct idmap_ldap_context *ctx = NULL;
+ const char *tmp = NULL;
+
+ /* Only do init if we are online */
+ if (idmap_is_offline()) {
+ return NT_STATUS_FILE_IS_OFFLINE;
+ }
+
+ ctx = talloc_zero(dom, struct idmap_ldap_context);
+ if ( ! ctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ tmp = idmap_config_const_string(dom->name, "ldap_url", NULL);
+
+ if ( ! tmp) {
+ DEBUG(1, ("ERROR: missing idmap ldap url\n"));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ ctx->url = talloc_strdup(ctx, tmp);
+
+ trim_char(ctx->url, '\"', '\"');
+
+ tmp = idmap_config_const_string(dom->name, "ldap_base_dn", NULL);
+ if ( ! tmp || ! *tmp) {
+ tmp = lp_ldap_idmap_suffix(talloc_tos());
+ if ( ! tmp) {
+ DEBUG(1, ("ERROR: missing idmap ldap suffix\n"));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+ }
+
+ ctx->suffix = talloc_strdup(ctx, tmp);
+ CHECK_ALLOC_DONE(ctx->suffix);
+
+ ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
+ CHECK_ALLOC_DONE(ctx->rw_ops);
+
+ ctx->rw_ops->get_new_id = idmap_ldap_allocate_id_internal;
+ ctx->rw_ops->set_mapping = idmap_ldap_set_mapping;
+
+ /* get_credentials deals with setting up creds */
+
+ ret = smbldap_init(ctx, global_event_context(), ctx->url,
+ false, NULL, NULL, &ctx->smbldap_state);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(1, ("ERROR: smbldap_init (%s) failed!\n", ctx->url));
+ goto done;
+ }
+
+ ret = get_credentials( ctx, ctx->smbldap_state,
+ dom, &ctx->user_dn );
+ if ( !NT_STATUS_IS_OK(ret) ) {
+ DEBUG(1,("idmap_ldap_db_init: Failed to get connection "
+ "credentials (%s)\n", nt_errstr(ret)));
+ goto done;
+ }
+
+ /*
+ * Set the destructor on the context, so that resources are
+ * properly freed when the context is released.
+ */
+ talloc_set_destructor(ctx, idmap_ldap_close_destructor);
+
+ dom->private_data = ctx;
+
+ ret = verify_idpool(dom);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(1, ("idmap_ldap_db_init: failed to verify ID pool (%s)\n",
+ nt_errstr(ret)));
+ goto done;
+ }
+
+ return NT_STATUS_OK;
+
+/*failed */
+done:
+ talloc_free(ctx);
+ return ret;
+}
+
+/**
+ * set a mapping.
+ */
+
+/* TODO: change this: This function cannot be called to modify a mapping,
+ * only set a new one */
+
+static NTSTATUS idmap_ldap_set_mapping(struct idmap_domain *dom,
+ const struct id_map *map)
+{
+ NTSTATUS ret;
+ TALLOC_CTX *memctx;
+ struct idmap_ldap_context *ctx;
+ LDAPMessage *entry = NULL;
+ LDAPMod **mods = NULL;
+ const char *type;
+ char *id_str;
+ struct dom_sid_buf sid;
+ char *dn;
+ int rc = -1;
+
+ /* Only do query if we are online */
+ if (idmap_is_offline()) {
+ return NT_STATUS_FILE_IS_OFFLINE;
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ switch(map->xid.type) {
+ case ID_TYPE_UID:
+ type = get_attr_key2string(sidmap_attr_list,
+ LDAP_ATTR_UIDNUMBER);
+ break;
+
+ case ID_TYPE_GID:
+ type = get_attr_key2string(sidmap_attr_list,
+ LDAP_ATTR_GIDNUMBER);
+ break;
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ memctx = talloc_new(ctx);
+ if ( ! memctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ id_str = talloc_asprintf(memctx, "%lu", (unsigned long)map->xid.id);
+ CHECK_ALLOC_DONE(id_str);
+
+ dn = talloc_asprintf(memctx, "%s=%s,%s",
+ get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
+ dom_sid_str_buf(map->sid, &sid),
+ ctx->suffix);
+ CHECK_ALLOC_DONE(dn);
+
+ smbldap_set_mod(&mods, LDAP_MOD_ADD,
+ "objectClass", LDAP_OBJ_IDMAP_ENTRY);
+
+ smbldap_make_mod(smbldap_get_ldap(ctx->smbldap_state),
+ entry, &mods, type, id_str);
+
+ smbldap_make_mod(smbldap_get_ldap(ctx->smbldap_state), entry, &mods,
+ get_attr_key2string(sidmap_attr_list, LDAP_ATTR_SID),
+ sid.buf);
+
+ if ( ! mods) {
+ DEBUG(2, ("ERROR: No mods?\n"));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ /* TODO: remove conflicting mappings! */
+
+ smbldap_set_mod(&mods, LDAP_MOD_ADD, "objectClass", LDAP_OBJ_SID_ENTRY);
+
+ DEBUG(10, ("Set DN %s (%s -> %s)\n", dn, sid.buf, id_str));
+
+ rc = smbldap_add(ctx->smbldap_state, dn, mods);
+ ldap_mods_free(mods, True);
+
+ if (rc != LDAP_SUCCESS) {
+ char *ld_error = NULL;
+ ldap_get_option(smbldap_get_ldap(ctx->smbldap_state),
+ LDAP_OPT_ERROR_STRING, &ld_error);
+ DEBUG(0,("ldap_set_mapping_internals: Failed to add %s to %lu "
+ "mapping [%s]\n", sid.buf,
+ (unsigned long)map->xid.id, type));
+ DEBUG(0, ("ldap_set_mapping_internals: Error was: %s (%s)\n",
+ ld_error ? ld_error : "(NULL)", ldap_err2string (rc)));
+ if (ld_error) {
+ ldap_memfree(ld_error);
+ }
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ DEBUG(10,("ldap_set_mapping: Successfully created mapping from %s to "
+ "%lu [%s]\n", sid.buf, (unsigned long)map->xid.id, type));
+
+ ret = NT_STATUS_OK;
+
+done:
+ talloc_free(memctx);
+ return ret;
+}
+
+/**
+ * Create a new mapping for an unmapped SID, also allocating a new ID.
+ * If possible, this should be run inside a transaction to make the
+ * action atomic.
+ */
+static NTSTATUS idmap_ldap_new_mapping(struct idmap_domain *dom, struct id_map *map)
+{
+ NTSTATUS ret;
+ struct idmap_ldap_context *ctx;
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
+
+ return ret;
+}
+
+/**********************************
+ lookup a set of unix ids.
+**********************************/
+
+static NTSTATUS idmap_ldap_unixids_to_sids(struct idmap_domain *dom,
+ struct id_map **ids)
+{
+ NTSTATUS ret;
+ TALLOC_CTX *memctx;
+ struct idmap_ldap_context *ctx;
+ LDAPMessage *result = NULL;
+ LDAPMessage *entry = NULL;
+ const char *uidNumber;
+ const char *gidNumber;
+ const char **attr_list;
+ char *filter = NULL;
+ bool multi = False;
+ int idx = 0;
+ int bidx = 0;
+ int count;
+ int rc;
+ int i;
+ int error = 0;
+
+ /* Only do query if we are online */
+ if (idmap_is_offline()) {
+ return NT_STATUS_FILE_IS_OFFLINE;
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ memctx = talloc_new(ctx);
+ if ( ! memctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
+ gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
+
+ attr_list = get_attr_list(memctx, sidmap_attr_list);
+
+ if ( ! ids[1]) {
+ /* if we are requested just one mapping use the simple filter */
+
+ filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%lu))",
+ LDAP_OBJ_IDMAP_ENTRY,
+ (ids[0]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
+ (unsigned long)ids[0]->xid.id);
+ CHECK_ALLOC_DONE(filter);
+ DEBUG(10, ("Filter: [%s]\n", filter));
+ } else {
+ /* multiple mappings */
+ multi = True;
+ }
+
+ for (i = 0; ids[i]; i++) {
+ ids[i]->status = ID_UNKNOWN;
+ }
+
+again:
+ if (multi) {
+
+ talloc_free(filter);
+ filter = talloc_asprintf(memctx,
+ "(&(objectClass=%s)(|",
+ LDAP_OBJ_IDMAP_ENTRY);
+ CHECK_ALLOC_DONE(filter);
+
+ bidx = idx;
+ for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
+ filter = talloc_asprintf_append_buffer(filter, "(%s=%lu)",
+ (ids[idx]->xid.type==ID_TYPE_UID)?uidNumber:gidNumber,
+ (unsigned long)ids[idx]->xid.id);
+ CHECK_ALLOC_DONE(filter);
+ }
+ filter = talloc_asprintf_append_buffer(filter, "))");
+ CHECK_ALLOC_DONE(filter);
+ DEBUG(10, ("Filter: [%s]\n", filter));
+ } else {
+ bidx = 0;
+ idx = 1;
+ }
+
+ rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
+ filter, attr_list, 0, &result);
+
+ if (rc != LDAP_SUCCESS) {
+ DEBUG(3,("Failure looking up ids (%s)\n", ldap_err2string(rc)));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ count = ldap_count_entries(smbldap_get_ldap(ctx->smbldap_state),
+ result);
+
+ if (count == 0) {
+ DEBUG(10, ("NO SIDs found\n"));
+ }
+
+ for (i = 0; i < count; i++) {
+ char *sidstr = NULL;
+ char *tmp = NULL;
+ enum id_type type;
+ struct id_map *map;
+ uint32_t id;
+ struct dom_sid_buf buf;
+
+ if (i == 0) { /* first entry */
+ entry = ldap_first_entry(
+ smbldap_get_ldap(ctx->smbldap_state), result);
+ } else { /* following ones */
+ entry = ldap_next_entry(
+ smbldap_get_ldap(ctx->smbldap_state), entry);
+ }
+ if ( ! entry) {
+ DEBUG(2, ("ERROR: Unable to fetch ldap entries "
+ "from results\n"));
+ break;
+ }
+
+ /* first check if the SID is present */
+ sidstr = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, LDAP_ATTRIBUTE_SID, memctx);
+ if ( ! sidstr) { /* no sid, skip entry */
+ DEBUG(2, ("WARNING SID not found on entry\n"));
+ continue;
+ }
+
+ /* now try to see if it is a uid, if not try with a gid
+ * (gid is more common, but in case both uidNumber and
+ * gidNumber are returned the SID is mapped to the uid
+ *not the gid) */
+ type = ID_TYPE_UID;
+ tmp = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, uidNumber, memctx);
+ if ( ! tmp) {
+ type = ID_TYPE_GID;
+ tmp = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, gidNumber, memctx);
+ }
+ if ( ! tmp) { /* wow very strange entry, how did it match ? */
+ DEBUG(5, ("Unprobable match on (%s), no uidNumber, "
+ "nor gidNumber returned\n", sidstr));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ id = smb_strtoul(tmp, NULL, 10, &error, SMB_STR_STANDARD);
+ TALLOC_FREE(tmp);
+ if (error != 0) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
+ "Filtered!\n", id,
+ dom->low_id, dom->high_id));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ if (!idmap_unix_id_is_in_range(id, dom)) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
+ "Filtered!\n", id,
+ dom->low_id, dom->high_id));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ map = idmap_find_map_by_id(&ids[bidx], type, id);
+ if (!map) {
+ DEBUG(2, ("WARNING: couldn't match sid (%s) "
+ "with requested ids\n", sidstr));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ if ( ! string_to_sid(map->sid, sidstr)) {
+ DEBUG(2, ("ERROR: Invalid SID on entry\n"));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ if (map->status == ID_MAPPED) {
+ DEBUG(1, ("WARNING: duplicate %s mapping in LDAP. "
+ "overwriting mapping %u -> %s with %u -> %s\n",
+ (type == ID_TYPE_UID) ? "UID" : "GID",
+ id,
+ dom_sid_str_buf(map->sid, &buf),
+ id,
+ sidstr));
+ }
+
+ TALLOC_FREE(sidstr);
+
+ /* mapped */
+ map->status = ID_MAPPED;
+
+ DEBUG(10, ("Mapped %s -> %lu (%d)\n",
+ dom_sid_str_buf(map->sid, &buf),
+ (unsigned long)map->xid.id, map->xid.type));
+ }
+
+ /* free the ldap results */
+ if (result) {
+ ldap_msgfree(result);
+ result = NULL;
+ }
+
+ if (multi && ids[idx]) { /* still some values to map */
+ goto again;
+ }
+
+ ret = NT_STATUS_OK;
+
+ /* mark all unknwon/expired ones as unmapped */
+ for (i = 0; ids[i]; i++) {
+ if (ids[i]->status != ID_MAPPED)
+ ids[i]->status = ID_UNMAPPED;
+ }
+
+done:
+ talloc_free(memctx);
+ return ret;
+}
+
+/**********************************
+ lookup a set of sids.
+**********************************/
+
+static NTSTATUS idmap_ldap_sids_to_unixids(struct idmap_domain *dom,
+ struct id_map **ids)
+{
+ LDAPMessage *entry = NULL;
+ NTSTATUS ret;
+ TALLOC_CTX *memctx;
+ struct idmap_ldap_context *ctx;
+ LDAPMessage *result = NULL;
+ const char *uidNumber;
+ const char *gidNumber;
+ const char **attr_list;
+ char *filter = NULL;
+ bool multi = False;
+ size_t num_required = 0;
+ int idx = 0;
+ int bidx = 0;
+ int count;
+ int rc;
+ int i;
+
+ /* Only do query if we are online */
+ if (idmap_is_offline()) {
+ return NT_STATUS_FILE_IS_OFFLINE;
+ }
+
+ ctx = talloc_get_type(dom->private_data, struct idmap_ldap_context);
+
+ memctx = talloc_new(ctx);
+ if ( ! memctx) {
+ DEBUG(0, ("Out of memory!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ uidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_UIDNUMBER);
+ gidNumber = get_attr_key2string(idpool_attr_list, LDAP_ATTR_GIDNUMBER);
+
+ attr_list = get_attr_list(memctx, sidmap_attr_list);
+
+ if ( ! ids[1]) {
+ struct dom_sid_buf buf;
+ /* if we are requested just one mapping use the simple filter */
+
+ filter = talloc_asprintf(memctx, "(&(objectClass=%s)(%s=%s))",
+ LDAP_OBJ_IDMAP_ENTRY,
+ LDAP_ATTRIBUTE_SID,
+ dom_sid_str_buf(ids[0]->sid, &buf));
+ CHECK_ALLOC_DONE(filter);
+ DEBUG(10, ("Filter: [%s]\n", filter));
+ } else {
+ /* multiple mappings */
+ multi = True;
+ }
+
+ for (i = 0; ids[i]; i++) {
+ ids[i]->status = ID_UNKNOWN;
+ }
+
+again:
+ if (multi) {
+
+ TALLOC_FREE(filter);
+ filter = talloc_asprintf(memctx,
+ "(&(objectClass=%s)(|",
+ LDAP_OBJ_IDMAP_ENTRY);
+ CHECK_ALLOC_DONE(filter);
+
+ bidx = idx;
+ for (i = 0; (i < IDMAP_LDAP_MAX_IDS) && ids[idx]; i++, idx++) {
+ struct dom_sid_buf buf;
+ filter = talloc_asprintf_append_buffer(filter, "(%s=%s)",
+ LDAP_ATTRIBUTE_SID,
+ dom_sid_str_buf(ids[idx]->sid, &buf));
+ CHECK_ALLOC_DONE(filter);
+ }
+ filter = talloc_asprintf_append_buffer(filter, "))");
+ CHECK_ALLOC_DONE(filter);
+ DEBUG(10, ("Filter: [%s]", filter));
+ } else {
+ bidx = 0;
+ idx = 1;
+ }
+
+ rc = smbldap_search(ctx->smbldap_state, ctx->suffix, LDAP_SCOPE_SUBTREE,
+ filter, attr_list, 0, &result);
+
+ if (rc != LDAP_SUCCESS) {
+ DEBUG(3,("Failure looking up sids (%s)\n",
+ ldap_err2string(rc)));
+ ret = NT_STATUS_UNSUCCESSFUL;
+ goto done;
+ }
+
+ count = ldap_count_entries(smbldap_get_ldap(ctx->smbldap_state),
+ result);
+
+ if (count == 0) {
+ DEBUG(10, ("NO SIDs found\n"));
+ }
+
+ for (i = 0; i < count; i++) {
+ char *sidstr = NULL;
+ char *tmp = NULL;
+ enum id_type type;
+ struct id_map *map;
+ struct dom_sid sid;
+ struct dom_sid_buf buf;
+ uint32_t id;
+ int error = 0;
+
+ if (i == 0) { /* first entry */
+ entry = ldap_first_entry(
+ smbldap_get_ldap(ctx->smbldap_state), result);
+ } else { /* following ones */
+ entry = ldap_next_entry(
+ smbldap_get_ldap(ctx->smbldap_state), entry);
+ }
+ if ( ! entry) {
+ DEBUG(2, ("ERROR: Unable to fetch ldap entries "
+ "from results\n"));
+ break;
+ }
+
+ /* first check if the SID is present */
+ sidstr = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, LDAP_ATTRIBUTE_SID, memctx);
+ if ( ! sidstr) { /* no sid ??, skip entry */
+ DEBUG(2, ("WARNING SID not found on entry\n"));
+ continue;
+ }
+
+ if ( ! string_to_sid(&sid, sidstr)) {
+ DEBUG(2, ("ERROR: Invalid SID on entry\n"));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ map = idmap_find_map_by_sid(&ids[bidx], &sid);
+ if (!map) {
+ DEBUG(2, ("WARNING: couldn't find entry sid (%s) "
+ "in ids", sidstr));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ /* now try to see if it is a uid, if not try with a gid
+ * (gid is more common, but in case both uidNumber and
+ * gidNumber are returned the SID is mapped to the uid
+ * not the gid) */
+ type = ID_TYPE_UID;
+ tmp = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, uidNumber, memctx);
+ if ( ! tmp) {
+ type = ID_TYPE_GID;
+ tmp = smbldap_talloc_single_attribute(
+ smbldap_get_ldap(ctx->smbldap_state),
+ entry, gidNumber, memctx);
+ }
+ if ( ! tmp) { /* no ids ?? */
+ DEBUG(5, ("no uidNumber, "
+ "nor gidNumber attributes found\n"));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ id = smb_strtoul(tmp, NULL, 10, &error, SMB_STR_STANDARD);
+ TALLOC_FREE(tmp);
+ if (error != 0) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
+ "Filtered!\n", id,
+ dom->low_id, dom->high_id));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ if (error != 0 || !idmap_unix_id_is_in_range(id, dom)) {
+ DEBUG(5, ("Requested id (%u) out of range (%u - %u). "
+ "Filtered!\n", id,
+ dom->low_id, dom->high_id));
+ TALLOC_FREE(sidstr);
+ continue;
+ }
+
+ if (map->status == ID_MAPPED) {
+ DEBUG(1, ("WARNING: duplicate %s mapping in LDAP. "
+ "overwriting mapping %s -> %u with %s -> %u\n",
+ (type == ID_TYPE_UID) ? "UID" : "GID",
+ sidstr, map->xid.id, sidstr, id));
+ }
+
+ TALLOC_FREE(sidstr);
+
+ /* mapped */
+ map->xid.type = type;
+ map->xid.id = id;
+ map->status = ID_MAPPED;
+
+ DEBUG(10, ("Mapped %s -> %lu (%d)\n",
+ dom_sid_str_buf(map->sid, &buf),
+ (unsigned long)map->xid.id,
+ map->xid.type));
+ }
+
+ /* free the ldap results */
+ if (result) {
+ ldap_msgfree(result);
+ result = NULL;
+ }
+
+ if (multi && ids[idx]) { /* still some values to map */
+ goto again;
+ }
+
+ /*
+ * try to create new mappings for unmapped sids
+ */
+ for (i = 0; ids[i]; i++) {
+ if (ids[i]->status != ID_MAPPED) {
+ ids[i]->status = ID_UNMAPPED;
+ if (ids[i]->sid != NULL) {
+ ret = idmap_ldap_new_mapping(dom, ids[i]);
+ DBG_DEBUG("idmap_ldap_new_mapping returned %s\n",
+ nt_errstr(ret));
+ if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED)) {
+ if (ids[i]->status == ID_REQUIRE_TYPE) {
+ num_required += 1;
+ continue;
+ }
+ }
+ if (!NT_STATUS_IS_OK(ret)) {
+ /*
+ * If we can't create
+ * a new mapping it's unlikely
+ * that it will work for the
+ * next entry.
+ */
+ goto done;
+ }
+ }
+ }
+ }
+
+ ret = NT_STATUS_OK;
+ if (num_required > 0) {
+ ret = STATUS_SOME_UNMAPPED;
+ }
+
+done:
+ talloc_free(memctx);
+ return ret;
+}
+
+/**********************************
+ Close the idmap ldap instance
+**********************************/
+
+static const struct idmap_methods idmap_ldap_methods = {
+
+ .init = idmap_ldap_db_init,
+ .unixids_to_sids = idmap_ldap_unixids_to_sids,
+ .sids_to_unixids = idmap_ldap_sids_to_unixids,
+ .allocate_id = idmap_ldap_allocate_id,
+};
+
+NTSTATUS idmap_ldap_init(TALLOC_CTX *);
+NTSTATUS idmap_ldap_init(TALLOC_CTX *ctx)
+{
+ return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "ldap",
+ &idmap_ldap_methods);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:57:00 +0000