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-rw-r--r--source3/winbindd/idmap_hash/idmap_hash.c504
-rw-r--r--source3/winbindd/idmap_hash/idmap_hash.h60
-rw-r--r--source3/winbindd/idmap_hash/mapfile.c182
3 files changed, 746 insertions, 0 deletions
diff --git a/source3/winbindd/idmap_hash/idmap_hash.c b/source3/winbindd/idmap_hash/idmap_hash.c
new file mode 100644
index 0000000..e9d90e3
--- /dev/null
+++ b/source3/winbindd/idmap_hash/idmap_hash.c
@@ -0,0 +1,504 @@
+/*
+ * idmap_hash.c
+ *
+ * Copyright (C) Gerald Carter <jerry@samba.org> 2007 - 2008
+ *
+ * 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/winbindd.h"
+#include "idmap.h"
+#include "idmap_hash.h"
+#include "ads.h"
+#include "nss_info.h"
+#include "../libcli/security/dom_sid.h"
+#include "libsmb/samlogon_cache.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_IDMAP
+
+struct sid_hash_table {
+ struct dom_sid *sid;
+};
+
+/*********************************************************************
+ Hash a domain SID (S-1-5-12-aaa-bbb-ccc) to a 12bit number
+ ********************************************************************/
+
+static uint32_t hash_domain_sid(const struct dom_sid *sid)
+{
+ uint32_t hash;
+
+ if (sid->num_auths != 4)
+ return 0;
+
+ /* XOR the last three subauths */
+
+ hash = ((sid->sub_auths[1] ^ sid->sub_auths[2]) ^ sid->sub_auths[3]);
+
+ /* Take all 32-bits into account when generating the 12-bit
+ hash value */
+ hash = (((hash & 0xFFF00000) >> 20)
+ + ((hash & 0x000FFF00) >> 8)
+ + (hash & 0x000000FF)) & 0x0000FFF;
+
+ /* return a 12-bit hash value */
+
+ return hash;
+}
+
+/*********************************************************************
+ Hash a Relative ID to a 19 bit number
+ ********************************************************************/
+
+static uint32_t hash_rid(uint32_t rid)
+{
+ /*
+ * 19 bits for the rid which allows us to support
+ * the first 50K users/groups in a domain
+ *
+ */
+
+ return (rid & 0x0007FFFF);
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static uint32_t combine_hashes(uint32_t h_domain,
+ uint32_t h_rid)
+{
+ uint32_t return_id = 0;
+
+ /*
+ * shift the hash_domain 19 bits to the left and OR with the
+ * hash_rid
+ *
+ * This will generate a 31 bit number out of
+ * 12 bit domain and 19 bit rid.
+ */
+
+ return_id = ((h_domain<<19) | h_rid);
+
+ return return_id;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static void separate_hashes(uint32_t id,
+ uint32_t *h_domain,
+ uint32_t *h_rid)
+{
+ *h_rid = id & 0x0007FFFF;
+ *h_domain = (id & 0x7FF80000) >> 19;
+
+ return;
+}
+
+
+/*********************************************************************
+ ********************************************************************/
+
+static NTSTATUS idmap_hash_initialize(struct idmap_domain *dom)
+{
+ struct sid_hash_table *hashed_domains;
+ NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+ struct winbindd_tdc_domain *dom_list = NULL;
+ size_t num_domains = 0;
+ size_t i;
+
+ DBG_ERR("The idmap_hash module is deprecated and should not be used. "
+ "Please migrate to a different plugin. This module will be "
+ "removed in a future version of Samba\n");
+
+ if (!strequal(dom->name, "*")) {
+ DBG_ERR("Error: idmap_hash configured for domain '%s'. "
+ "But the hash module can only be used for the default "
+ "idmap configuration.\n", dom->name);
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!wcache_tdc_fetch_list(&dom_list, &num_domains)) {
+ nt_status = NT_STATUS_TRUSTED_DOMAIN_FAILURE;
+ BAIL_ON_NTSTATUS_ERROR(nt_status);
+ }
+
+ /* Create the hash table of domain SIDs */
+
+ hashed_domains = talloc_zero_array(dom, struct sid_hash_table, 4096);
+ BAIL_ON_PTR_NT_ERROR(hashed_domains, nt_status);
+
+ /* create the hash table of domain SIDs */
+
+ for (i=0; i<num_domains; i++) {
+ struct dom_sid_buf buf;
+ uint32_t hash;
+
+ if (is_null_sid(&dom_list[i].sid))
+ continue;
+
+ /*
+ * Check if the domain from the list is not already configured
+ * to use another idmap backend. Not checking this makes the
+ * idmap_hash module map IDs for *all* domains implicitly. This
+ * is quite dangerous in setups that use multiple idmap
+ * configurations.
+ */
+
+ if (domain_has_idmap_config(dom_list[i].domain_name)) {
+ continue;
+ }
+
+ if ((hash = hash_domain_sid(&dom_list[i].sid)) == 0)
+ continue;
+
+ DBG_INFO("Adding %s (%s) -> %d\n",
+ dom_list[i].domain_name,
+ dom_sid_str_buf(&dom_list[i].sid, &buf),
+ hash);
+
+ hashed_domains[hash].sid = talloc(hashed_domains, struct dom_sid);
+ sid_copy(hashed_domains[hash].sid, &dom_list[i].sid);
+ }
+
+ dom->private_data = hashed_domains;
+
+done:
+ return nt_status;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static NTSTATUS idmap_hash_id_to_sid(struct sid_hash_table *hashed_domains,
+ struct idmap_domain *dom,
+ struct id_map *id)
+{
+ uint32_t h_domain = 0, h_rid = 0;
+
+ id->status = ID_UNMAPPED;
+
+ separate_hashes(id->xid.id, &h_domain, &h_rid);
+
+ /*
+ * If the domain hash doesn't find a SID in the table,
+ * skip it
+ */
+ if (hashed_domains[h_domain].sid == NULL) {
+ /* keep ID_UNMAPPED */
+ return NT_STATUS_OK;
+ }
+
+ id->xid.type = ID_TYPE_BOTH;
+ sid_compose(id->sid, hashed_domains[h_domain].sid, h_rid);
+ id->status = ID_MAPPED;
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS unixids_to_sids(struct idmap_domain *dom,
+ struct id_map **ids)
+{
+ struct sid_hash_table *hashed_domains = talloc_get_type_abort(
+ dom->private_data, struct sid_hash_table);
+ size_t i;
+ size_t num_tomap = 0;
+ size_t num_mapped = 0;
+
+ /* initialize the status to avoid surprise */
+ for (i = 0; ids[i]; i++) {
+ ids[i]->status = ID_UNKNOWN;
+ num_tomap++;
+ }
+
+ for (i=0; ids[i]; i++) {
+ NTSTATUS ret;
+
+ ret = idmap_hash_id_to_sid(hashed_domains, dom, ids[i]);
+ if (!NT_STATUS_IS_OK(ret)) {
+ /* some fatal error occurred, log it */
+ DBG_NOTICE("Unexpected error resolving an ID "
+ "(%d): %s\n", ids[i]->xid.id,
+ nt_errstr(ret));
+ return ret;
+ }
+
+ if (ids[i]->status == ID_MAPPED) {
+ num_mapped++;
+ }
+ }
+
+ if (num_tomap == num_mapped) {
+ return NT_STATUS_OK;
+ } else if (num_mapped == 0) {
+ return NT_STATUS_NONE_MAPPED;
+ }
+
+ return STATUS_SOME_UNMAPPED;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static NTSTATUS idmap_hash_sid_to_id(struct sid_hash_table *hashed_domains,
+ struct idmap_domain *dom,
+ struct id_map *id)
+{
+ struct dom_sid sid;
+ uint32_t rid;
+ uint32_t h_domain, h_rid;
+
+ id->status = ID_UNMAPPED;
+
+ sid_copy(&sid, id->sid);
+ sid_split_rid(&sid, &rid);
+
+ h_domain = hash_domain_sid(&sid);
+ h_rid = hash_rid(rid);
+
+ /* Check that both hashes are non-zero*/
+ if (h_domain == 0) {
+ /* keep ID_UNMAPPED */
+ return NT_STATUS_OK;
+ }
+ if (h_rid == 0) {
+ /* keep ID_UNMAPPED */
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * If the domain hash already exists find a SID in the table,
+ * just return the mapping.
+ */
+ if (hashed_domains[h_domain].sid != NULL) {
+ goto return_mapping;
+ }
+
+ /*
+ * Check of last resort: A domain is valid if a user from that
+ * domain has recently logged in. The samlogon_cache these
+ * days also stores the domain sid.
+ */
+ if (netsamlogon_cache_have(&sid)) {
+ /*
+ * The domain is valid, so we'll
+ * remember it in order to
+ * allow reverse mappings to work.
+ */
+ goto remember_domain;
+ }
+
+ if (id->xid.type == ID_TYPE_NOT_SPECIFIED) {
+ /*
+ * idmap_hash used to bounce back the requested type,
+ * which was ID_TYPE_UID, ID_TYPE_GID or
+ * ID_TYPE_NOT_SPECIFIED before as the winbindd parent
+ * always used a lookupsids. When the lookupsids
+ * failed because of an unknown domain, the idmap child
+ * weren't requested at all and the caller sees
+ * ID_TYPE_NOT_SPECIFIED.
+ *
+ * Now that the winbindd parent will pass ID_TYPE_BOTH
+ * in order to indicate that the domain exists.
+ * We should ask the parent to fallback to lookupsids
+ * if the domain is not known yet.
+ */
+ id->status = ID_REQUIRE_TYPE;
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * Now we're sure the domain exist, remember
+ * the domain in order to return reverse mappings
+ * in future.
+ */
+remember_domain:
+ hashed_domains[h_domain].sid = dom_sid_dup(hashed_domains, &sid);
+ if (hashed_domains[h_domain].sid == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /*
+ * idmap_hash used to bounce back the requested type,
+ * which was ID_TYPE_UID, ID_TYPE_GID or
+ * ID_TYPE_NOT_SPECIFIED before as the winbindd parent
+ * always used a lookupsids.
+ *
+ * This module should have supported ID_TYPE_BOTH since
+ * samba-4.1.0, similar to idmap_rid and idmap_autorid.
+ *
+ * Now that the winbindd parent will pass ID_TYPE_BOTH
+ * in order to indicate that the domain exists, it's
+ * better to always return ID_TYPE_BOTH instead of a
+ * random mix of ID_TYPE_UID, ID_TYPE_GID or
+ * ID_TYPE_BOTH.
+ */
+return_mapping:
+ id->xid.type = ID_TYPE_BOTH;
+ id->xid.id = combine_hashes(h_domain, h_rid);
+ id->status = ID_MAPPED;
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS sids_to_unixids(struct idmap_domain *dom,
+ struct id_map **ids)
+{
+ struct sid_hash_table *hashed_domains = talloc_get_type_abort(
+ dom->private_data, struct sid_hash_table);
+ size_t i;
+ size_t num_tomap = 0;
+ size_t num_mapped = 0;
+ size_t num_required = 0;
+
+ /* initialize the status to avoid surprise */
+ for (i = 0; ids[i]; i++) {
+ ids[i]->status = ID_UNKNOWN;
+ num_tomap++;
+ }
+
+ for (i=0; ids[i]; i++) {
+ NTSTATUS ret;
+
+ ret = idmap_hash_sid_to_id(hashed_domains, dom, ids[i]);
+ if (!NT_STATUS_IS_OK(ret)) {
+ struct dom_sid_buf buf;
+ /* some fatal error occurred, log it */
+ DBG_NOTICE("Unexpected error resolving a SID "
+ "(%s): %s\n",
+ dom_sid_str_buf(ids[i]->sid, &buf),
+ nt_errstr(ret));
+ return ret;
+ }
+
+ if (ids[i]->status == ID_MAPPED) {
+ num_mapped++;
+ }
+ if (ids[i]->status == ID_REQUIRE_TYPE) {
+ num_required++;
+ }
+ }
+
+ if (num_tomap == num_mapped) {
+ return NT_STATUS_OK;
+ } else if (num_required > 0) {
+ return STATUS_SOME_UNMAPPED;
+ } else if (num_mapped == 0) {
+ return NT_STATUS_NONE_MAPPED;
+ }
+
+ return STATUS_SOME_UNMAPPED;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static NTSTATUS nss_hash_init(struct nss_domain_entry *e )
+{
+ return NT_STATUS_OK;
+}
+
+/**********************************************************************
+ *********************************************************************/
+
+static NTSTATUS nss_hash_map_to_alias(TALLOC_CTX *mem_ctx,
+ struct nss_domain_entry *e,
+ const char *name,
+ char **alias)
+{
+ NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
+ const char *value;
+
+ value = talloc_asprintf(mem_ctx, "%s\\%s", e->domain, name);
+ BAIL_ON_PTR_NT_ERROR(value, nt_status);
+
+ nt_status = mapfile_lookup_key(mem_ctx, value, alias);
+ BAIL_ON_NTSTATUS_ERROR(nt_status);
+
+done:
+ return nt_status;
+}
+
+/**********************************************************************
+ *********************************************************************/
+
+static NTSTATUS nss_hash_map_from_alias(TALLOC_CTX *mem_ctx,
+ struct nss_domain_entry *e,
+ const char *alias,
+ char **name)
+{
+ return mapfile_lookup_value(mem_ctx, alias, name);
+}
+
+/**********************************************************************
+ *********************************************************************/
+
+static NTSTATUS nss_hash_close(void)
+{
+ return NT_STATUS_OK;
+}
+
+/*********************************************************************
+ Dispatch Tables for IDMap and NssInfo Methods
+********************************************************************/
+
+static const struct idmap_methods hash_idmap_methods = {
+ .init = idmap_hash_initialize,
+ .unixids_to_sids = unixids_to_sids,
+ .sids_to_unixids = sids_to_unixids,
+};
+
+static const struct nss_info_methods hash_nss_methods = {
+ .init = nss_hash_init,
+ .map_to_alias = nss_hash_map_to_alias,
+ .map_from_alias = nss_hash_map_from_alias,
+ .close_fn = nss_hash_close
+};
+
+/**********************************************************************
+ Register with the idmap and idmap_nss subsystems. We have to protect
+ against the idmap and nss_info interfaces being in a half-registered
+ state.
+ **********************************************************************/
+
+static_decl_idmap;
+NTSTATUS idmap_hash_init(TALLOC_CTX *ctx)
+{
+ static NTSTATUS idmap_status = NT_STATUS_UNSUCCESSFUL;
+ static NTSTATUS nss_status = NT_STATUS_UNSUCCESSFUL;
+
+ if ( !NT_STATUS_IS_OK(idmap_status) ) {
+ idmap_status = smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION,
+ "hash", &hash_idmap_methods);
+
+ if ( !NT_STATUS_IS_OK(idmap_status) ) {
+ DEBUG(0,("Failed to register hash idmap plugin.\n"));
+ return idmap_status;
+ }
+ }
+
+ if ( !NT_STATUS_IS_OK(nss_status) ) {
+ nss_status = smb_register_idmap_nss(SMB_NSS_INFO_INTERFACE_VERSION,
+ "hash", &hash_nss_methods);
+ if ( !NT_STATUS_IS_OK(nss_status) ) {
+ DEBUG(0,("Failed to register hash idmap nss plugin.\n"));
+ return nss_status;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
diff --git a/source3/winbindd/idmap_hash/idmap_hash.h b/source3/winbindd/idmap_hash/idmap_hash.h
new file mode 100644
index 0000000..621520e
--- /dev/null
+++ b/source3/winbindd/idmap_hash/idmap_hash.h
@@ -0,0 +1,60 @@
+/*
+ * lwopen.h
+ *
+ * Copyright (C) Gerald Carter <jerry@samba.org>
+ *
+ * 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/>.
+ *
+ */
+
+#ifndef _LWOPEN_H
+#define _LWOPEN_H
+
+#define BAIL_ON_NTSTATUS_ERROR(x) \
+ do { \
+ if (!NT_STATUS_IS_OK(x)) { \
+ DEBUG(10,("Failed! (%s)\n", nt_errstr(x))); \
+ goto done; \
+ } \
+ } \
+ while (0); \
+
+#define BAIL_ON_PTR_NT_ERROR(p, x) \
+ do { \
+ if ((p) == NULL ) { \
+ DEBUG(10,("NULL pointer!\n")); \
+ x = NT_STATUS_NO_MEMORY; \
+ goto done; \
+ } else { \
+ x = NT_STATUS_OK; \
+ } \
+ } while (0);
+
+#define PRINT_NTSTATUS_ERROR(x, hdr, level) \
+ do { \
+ if (!NT_STATUS_IS_OK(x)) { \
+ DEBUG(level,("Likewise Open ("hdr"): %s\n", nt_errstr(x))); \
+ } \
+ } while(0);
+
+
+NTSTATUS mapfile_lookup_key(TALLOC_CTX *ctx,
+ const char *value,
+ char **key);
+
+NTSTATUS mapfile_lookup_value(TALLOC_CTX *ctx,
+ const char *key,
+ char **value);
+
+#endif /* _LWOPEN_H */
diff --git a/source3/winbindd/idmap_hash/mapfile.c b/source3/winbindd/idmap_hash/mapfile.c
new file mode 100644
index 0000000..82812a1
--- /dev/null
+++ b/source3/winbindd/idmap_hash/mapfile.c
@@ -0,0 +1,182 @@
+/*
+ * mapfile.c
+ *
+ * Copyright (C) Gerald Carter <jerry@samba.org>
+ *
+ * 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 "system/filesys.h"
+#include "winbindd/winbindd.h"
+#include "idmap.h"
+#include "idmap_hash.h"
+
+static FILE *lw_map_file = NULL;
+
+/*********************************************************************
+ ********************************************************************/
+
+static bool mapfile_open(void)
+{
+ const char *mapfile_name = NULL;
+
+ /* If we have an open handle, just reset it */
+
+ if (lw_map_file) {
+ return (fseek(lw_map_file, 0, SEEK_SET) == 0);
+ }
+
+ mapfile_name = lp_parm_const_string(-1, "idmap_hash", "name_map", NULL);
+ if (!mapfile_name) {
+ return false;
+ }
+
+ lw_map_file = fopen(mapfile_name, "r");
+ if (!lw_map_file) {
+ DEBUG(0,("can't open idmap_hash:name_map (%s). Error %s\n",
+ mapfile_name, strerror(errno) ));
+ return false;
+ }
+
+ return true;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static bool mapfile_read_line(fstring key, fstring value)
+{
+ char buffer[1024];
+ char *p;
+ int len;
+
+ if (!lw_map_file)
+ return false;
+
+ p = fgets(buffer, sizeof(buffer)-1, lw_map_file);
+ if (p == NULL) {
+ return false;
+ }
+
+ /* Strip newlines and carriage returns */
+
+ len = strlen_m(buffer);
+ if (len == 0) {
+ return false;
+ }
+ len -= 1;
+
+ while ((buffer[len] == '\n') || (buffer[len] == '\r')) {
+ buffer[len--] = '\0';
+ }
+
+
+ if ((p = strchr_m(buffer, '=')) == NULL ) {
+ DEBUG(0,("idmap_hash: Bad line in name_map (%s)\n", buffer));
+ return false;
+ }
+
+ *p = '\0';
+ p++;
+
+ strlcpy(key, buffer, sizeof(fstring));
+ strlcpy(value, p, sizeof(fstring));
+
+ /* Eat whitespace */
+
+ if (!trim_char(key, ' ', ' '))
+ return false;
+
+ if (!trim_char(value, ' ', ' '))
+ return false;
+
+ return true;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+static bool mapfile_close(void)
+{
+ int ret = 0;
+ if (lw_map_file) {
+ ret = fclose(lw_map_file);
+ lw_map_file = NULL;
+ }
+
+ return (ret == 0);
+}
+
+
+/*********************************************************************
+ ********************************************************************/
+
+NTSTATUS mapfile_lookup_key(TALLOC_CTX *ctx, const char *value, char **key)
+{
+ fstring r_key, r_value;
+ NTSTATUS ret = NT_STATUS_NOT_FOUND;
+
+ if (!mapfile_open())
+ return NT_STATUS_OBJECT_PATH_NOT_FOUND;
+
+ while (mapfile_read_line(r_key, r_value))
+ {
+ if (strequal(r_value, value)) {
+ ret = NT_STATUS_OK;
+
+ /* We're done once finishing this block */
+ *key = talloc_strdup(ctx, r_key);
+ if (!*key) {
+ ret = NT_STATUS_NO_MEMORY;
+ }
+ break;
+ }
+ }
+
+ mapfile_close();
+
+ return ret;
+}
+
+/*********************************************************************
+ ********************************************************************/
+
+NTSTATUS mapfile_lookup_value(TALLOC_CTX *ctx, const char *key, char **value)
+{
+ fstring r_key, r_value;
+ NTSTATUS ret = NT_STATUS_NOT_FOUND;
+
+ if (!mapfile_open())
+ return NT_STATUS_OBJECT_PATH_NOT_FOUND;
+
+ while (mapfile_read_line(r_key, r_value))
+ {
+ if (strequal(r_key, key)) {
+ ret = NT_STATUS_OK;
+
+ /* We're done once finishing this block */
+ *value = talloc_strdup(ctx, r_value);
+ if (!*key) {
+ ret = NT_STATUS_NO_MEMORY;
+ }
+ break;
+ }
+ }
+
+ mapfile_close();
+
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 03:58:36 +0000