#include "includes.h"
#include "libcli/security/security.h"
+/* Todos:
+ * build the security token dacl as follows:
+ * SYSTEM: GA, OWNER: GA, LOGIN_SID:GW|GE
+ * Need session id information for the login SID. Probably
+ * the best place for this is during token creation
+ *
+ * Implement SD Invariants
+ * ACE sorting rules
+ * LDAP_SERVER_SD_FLAGS_OID control
+ * ADTS 7.1.3.3 needs to be clarified
+ */
+
/* the mapping function for generic rights for DS.(GA,GR,GW,GX)
* The mapping function is passed as an argument to the
* descriptor calculating routine and depends on the security
return access_mask;
}
+/* Not sure what this has to be,
+* and it does not seem to have any influence */
+static bool object_in_list(struct GUID *object_list, struct GUID *object)
+{
+ return true;
+}
+
+
+static bool contains_inheritable_aces(struct security_acl *acl)
+{
+ int i;
+ if (!acl)
+ return false;
+
+ for (i=0; i < acl->num_aces; i++) {
+ struct security_ace *ace = &acl->aces[i];
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
+ return true;
+ }
+
+ return false;
+}
+
+static struct security_acl *preprocess_creator_acl(TALLOC_CTX *mem, struct security_acl *acl)
+{
+ int i;
+ struct security_acl *new_acl = talloc_zero(mem, struct security_acl);
+
+ new_acl->revision = acl->revision;
+ for (i=0; i < acl->num_aces; i++) {
+ struct security_ace *ace = &acl->aces[i];
+ if (!(ace->flags & SEC_ACE_FLAG_INHERITED_ACE)){
+ new_acl->aces = talloc_realloc(new_acl, new_acl->aces, struct security_ace,
+ new_acl->num_aces+1);
+ if (new_acl->aces == NULL) {
+ talloc_free(new_acl);
+ return NULL;
+ }
+ new_acl->aces[new_acl->num_aces] = *ace;
+ /*memcpy(&new_acl->aces[new_acl->num_aces], ace,
+ sizeof(struct security_ace)); */
+ new_acl->num_aces++;
+ }
+ }
+ if (new_acl)
+ new_acl->revision = acl->revision;
+ /* Todo what to do if all were inherited and this is empty */
+ return new_acl;
+}
+
+/* This is not exactly as described in the docs. The original seemed to return
+ * only a list of the inherited or flagless ones... */
+
+static bool postprocess_acl(struct security_acl *acl,
+ struct dom_sid *owner,
+ struct dom_sid *group,
+ uint32_t (*generic_map)(uint32_t access_mask))
+{
+ int i;
+ struct dom_sid *co, *cg;
+ TALLOC_CTX *tmp_ctx = talloc_new(acl);
+ if (!generic_map){
+ return false;
+ }
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (!(ace->flags == 0 || ace->flags & SEC_ACE_FLAG_INHERITED_ACE))
+ continue;
+ if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY)
+ continue;
+ if (dom_sid_equal(&ace->trustee, co)){
+ ace->trustee = *owner;
+ /* perhaps this should be done somewhere else? */
+ ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
+ }
+ if (dom_sid_equal(&ace->trustee, cg)){
+ ace->trustee = *group;
+ ace->flags &= ~SEC_ACE_FLAG_CONTAINER_INHERIT;
+ }
+ ace->access_mask = generic_map(ace->access_mask);
+ }
+
+ talloc_free(tmp_ctx);
+ return true;
+}
+
+static struct security_acl *calculate_inherited_from_parent(TALLOC_CTX *mem_ctx,
+ struct security_acl *acl,
+ bool is_container,
+ struct GUID *object_list)
+{
+ int i;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
+ struct security_acl *inh_acl = talloc_zero(tmp_ctx, struct security_acl);
+ struct security_acl *new_acl;
+ struct dom_sid *co, *cg;
+ if (!tmp_acl || !inh_acl)
+ return NULL;
+
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (ace->flags & SEC_ACE_FLAG_INHERIT_ONLY)
+ continue;
+
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)){
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ if (tmp_acl->aces == NULL) {
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERITED_ACE;
+
+ if (is_container && (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT))
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+
+ if (ace->type == SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT ||
+ ace->type == SEC_ACE_TYPE_ACCESS_DENIED_OBJECT){
+ if (!object_in_list(object_list, &ace->object.object.type.type)){
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ }
+
+ }
+ tmp_acl->num_aces++;
+ }
+ }
+
+ if (is_container){
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+
+ if (ace->flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT)
+ continue;
+ if (!dom_sid_equal(&ace->trustee, co) && !dom_sid_equal(&ace->trustee, cg))
+ continue;
+
+ if ((ace->flags & SEC_ACE_FLAG_CONTAINER_INHERIT) ||
+ (ace->flags & SEC_ACE_FLAG_OBJECT_INHERIT)){
+ inh_acl->aces = talloc_realloc(inh_acl, inh_acl->aces, struct security_ace,
+ inh_acl->num_aces+1);
+ if (inh_acl->aces == NULL){
+ talloc_free(tmp_ctx);
+ return NULL;
+ }
+ inh_acl->aces[inh_acl->num_aces] = *ace;
+ inh_acl->aces[inh_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ inh_acl->aces[inh_acl->num_aces].flags |= SEC_ACE_FLAG_INHERITED_ACE;
+ inh_acl->num_aces++;
+ }
+ }
+ }
+ new_acl = security_acl_concatenate(mem_ctx,tmp_acl, inh_acl);
+ if (new_acl)
+ new_acl->revision = acl->revision;
+ talloc_free(tmp_ctx);
+ return new_acl;
+}
+
+/* In the docs this looks == calculate_inherited_from_parent. However,
+ * It shouldn't return the inherited, rather filter them out....
+ */
+static struct security_acl *calculate_inherited_from_creator(TALLOC_CTX *mem_ctx,
+ struct security_acl *acl,
+ bool is_container,
+ struct GUID *object_list)
+{
+ int i;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ struct security_acl *tmp_acl = talloc_zero(tmp_ctx, struct security_acl);
+/* struct security_acl *inh_acl = talloc_zero(tmp_ctx, struct security_acl); */
+ struct security_acl *new_acl;
+ struct dom_sid *co, *cg;
+
+ if (!tmp_acl)
+ return NULL;
+
+ co = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_OWNER);
+ cg = dom_sid_parse_talloc(tmp_ctx, SID_CREATOR_GROUP);
+
+ for (i=0; i < acl->num_aces; i++){
+ struct security_ace *ace = &acl->aces[i];
+ if (ace->flags & SEC_ACE_FLAG_INHERITED_ACE)
+ continue;
+
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags = 0;
+ tmp_acl->num_aces++;
+
+ if (!dom_sid_equal(&ace->trustee, co) && !dom_sid_equal(&ace->trustee, cg))
+ continue;
+
+ tmp_acl->aces = talloc_realloc(tmp_acl, tmp_acl->aces, struct security_ace,
+ tmp_acl->num_aces+1);
+ tmp_acl->aces[tmp_acl->num_aces] = *ace;
+ tmp_acl->aces[tmp_acl->num_aces].flags |= SEC_ACE_FLAG_INHERIT_ONLY;
+ tmp_acl->num_aces++;
+ }
+ new_acl = security_acl_dup(mem_ctx,tmp_acl);
+
+ talloc_free(tmp_ctx);
+ return new_acl;
+}
+
+static bool compute_acl(int acl_type,
+ struct security_descriptor *parent_sd,
+ struct security_descriptor *creator_sd,
+ bool is_container,
+ uint32_t inherit_flags,
+ struct GUID *object_list,
+ uint32_t (*generic_map)(uint32_t access_mask),
+ struct security_token *token,
+ struct security_descriptor *new_sd) /* INOUT argument */
+{
+ struct security_acl *p_acl = NULL, *c_acl = NULL, **new_acl;
+ if (acl_type == SEC_DESC_DACL_PRESENT){
+ if (parent_sd)
+ p_acl = parent_sd->dacl;
+ if (creator_sd)
+ c_acl = creator_sd->dacl;
+ new_acl = &new_sd->dacl;
+ }
+ else{
+ if (parent_sd)
+ p_acl = parent_sd->sacl;
+ if (creator_sd)
+ c_acl = creator_sd->sacl;
+ new_acl = &new_sd->sacl;
+ }
+ if (contains_inheritable_aces(p_acl)){
+ if (!c_acl || (c_acl && inherit_flags & SEC_DEFAULT_DESCRIPTOR)){
+ *new_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid, generic_map))
+ return false;
+ else
+ goto final;
+ }
+ if (c_acl && !(inherit_flags & SEC_DEFAULT_DESCRIPTOR)){
+ struct security_acl *pr_acl, *tmp_acl, *tpr_acl;
+ tpr_acl = preprocess_creator_acl(new_sd, c_acl);
+ tmp_acl = calculate_inherited_from_creator(new_sd,
+ tpr_acl,
+ is_container,
+ object_list);
+ /* Todo some refactoring here! */
+ if (acl_type == SEC_DESC_DACL_PRESENT &&
+ !(creator_sd->type & SECINFO_PROTECTED_DACL) &&
+ (inherit_flags & SEC_DACL_AUTO_INHERIT)){
+ pr_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+
+ *new_acl = security_acl_concatenate(new_sd, tmp_acl, pr_acl);
+ new_sd->type |= SEC_DESC_DACL_AUTO_INHERITED;
+ }
+ else if (acl_type == SEC_DESC_SACL_PRESENT &&
+ !(creator_sd->type & SECINFO_PROTECTED_SACL) &&
+ (inherit_flags & SEC_SACL_AUTO_INHERIT)){
+ pr_acl = calculate_inherited_from_parent(new_sd,
+ p_acl,
+ is_container,
+ object_list);
+
+ *new_acl = security_acl_concatenate(new_sd, tmp_acl, pr_acl);
+ new_sd->type |= SEC_DESC_SACL_AUTO_INHERITED;
+ }
+ }
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid,generic_map))
+ return false;
+ else
+ goto final;
+ }
+ else{
+ if (!c_acl){
+ if (acl_type == SEC_DESC_DACL_PRESENT && token->default_dacl)
+ *new_acl = security_acl_dup(new_sd, token->default_dacl);
+ }
+ else{
+ *new_acl = preprocess_creator_acl(new_sd,c_acl);
+ if (*new_acl == NULL)
+ goto final;
+ if (!postprocess_acl(*new_acl, new_sd->owner_sid,
+ new_sd->group_sid,generic_map))
+ return false;
+ else
+ goto final;
+ }
+ }
+final:
+ if (acl_type == SEC_DESC_DACL_PRESENT && new_sd->dacl)
+ new_sd->type |= SEC_DESC_DACL_PRESENT;
+
+ if (acl_type == SEC_DESC_SACL_PRESENT && new_sd->sacl)
+ new_sd->type |= SEC_DESC_SACL_PRESENT;
+ /* This is a hack to handle the fact that
+ * apprantly any AI flag provided by the user is preserved */
+ if (creator_sd)
+ new_sd->type |= creator_sd->type;
+ return true;
+}
+
struct security_descriptor *create_security_descriptor(TALLOC_CTX *mem_ctx,
struct security_descriptor *parent_sd,
struct security_descriptor *creator_sd,
talloc_free(new_sd);
return NULL;
}
- /* Todo remove */
- if (creator_sd && creator_sd->type & SEC_DESC_DACL_PRESENT){
- new_sd->dacl = security_acl_dup(new_sd, creator_sd->dacl);
- new_sd->type |= SEC_DESC_DACL_PRESENT;
+
+ if (!compute_acl(SEC_DESC_DACL_PRESENT, parent_sd, creator_sd,
+ is_container, inherit_flags, object_list,
+ generic_map,token,new_sd)){
+ talloc_free(new_sd);
+ return NULL;
}
+
+ if (!compute_acl(SEC_DESC_SACL_PRESENT, parent_sd, creator_sd,
+ is_container, inherit_flags, object_list,
+ generic_map, token,new_sd)){
+ talloc_free(new_sd);
+ return NULL;
+ }
+
return new_sd;
}
from samba.samdb import SamDB
from samba.idmap import IDmapDB
from samba.dcerpc import security
+from samba.ndr import ndr_pack
import urllib
from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL, SCOPE_BASE, LdbError, timestring
from ms_schema import read_ms_schema
return ret
raise Exception("Unable to find setup directory.")
+def get_schema_descriptor(domain_sid):
+ sddl = "O:SAG:SAD:(A;CI;RPLCLORC;;;AU)(A;CI;RPWPCRCCLCLORCWOWDSW;;;SA)" \
+ "(A;CI;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)" \
+ "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \
+ "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;ED)" \
+ "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \
+ "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;BA)" \
+ "S:(AU;SA;WPCCDCWOWDSDDTSW;;;WD)" \
+ "(AU;CISA;WP;;;WD)(AU;SA;CR;;;BA)" \
+ "(AU;SA;CR;;;DU)(OU;SA;CR;e12b56b6-0a95-11d1-adbb-00c04fd8d5cd;;WD)" \
+ "(OU;SA;CR;45ec5156-db7e-47bb-b53f-dbeb2d03c40f;;WD)"
+ sec = security.descriptor.from_sddl(sddl, domain_sid)
+ return b64encode(ndr_pack(sec))
+
+def get_config_descriptor(domain_sid):
+ sddl = "O:EAG:EAD:(OA;;CR;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \
+ "(OA;;CR;1131f6ab-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \
+ "(OA;;CR;1131f6ac-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \
+ "(OA;;CR;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \
+ "(OA;;CR;1131f6ab-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \
+ "(OA;;CR;1131f6ac-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \
+ "(A;;RPLCLORC;;;AU)(A;CI;RPWPCRCCDCLCLORCWOWDSDDTSW;;;EA)" \
+ "(A;;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)(A;CIIO;RPWPCRCCLCLORCWOWDSDSW;;;DA)" \
+ "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;ED)" \
+ "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;ED)" \
+ "(OA;;CR;1131f6ad-9c07-11d1-f79f-00c04fc2dcd2;;BA)" \
+ "(OA;;CR;89e95b76-444d-4c62-991a-0facbeda640c;;BA)" \
+ "(OA;;CR;1131f6aa-9c07-11d1-f79f-00c04fc2dcd2;;S-1-5-21-3191434175-1265308384-3577286990-498)" \
+ "S:(AU;SA;WPWOWD;;;WD)(AU;SA;CR;;;BA)(AU;SA;CR;;;DU)" \
+ "(OU;SA;CR;45ec5156-db7e-47bb-b53f-dbeb2d03c40f;;WD)"
+ sec = security.descriptor.from_sddl(sddl, domain_sid)
+ return b64encode(ndr_pack(sec))
+
DEFAULTSITE = "Default-First-Site-Name"
self.samdb = None
class Schema(object):
- def __init__(self, setup_path, schemadn=None,
+ def __init__(self, setup_path, domain_sid, schemadn=None,
serverdn=None, sambadn=None, ldap_backend_type=None):
"""Load schema for the SamDB from the AD schema files and samba4_schema.ldif
{"SCHEMADN": schemadn,
"SERVERDN": serverdn,
})
+
+ descr = get_schema_descriptor(domain_sid)
self.schema_dn_add = read_and_sub_file(setup_path("provision_schema_basedn.ldif"),
- {"SCHEMADN": schemadn
+ {"SCHEMADN": schemadn,
+ "DESCRIPTOR": descr
})
prefixmap = open(setup_path("prefixMap.txt"), 'r').read()
ldap_backend=ldap_backend, serverrole=serverrole)
if (schema == None):
- schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn,
+ schema = Schema(setup_path, domainsid, schemadn=names.schemadn, serverdn=names.serverdn,
sambadn=names.sambadn, ldap_backend_type=ldap_backend.ldap_backend_type)
# Load the database, but importantly, use Ldb not SamDB as we don't want to load the global schema
})
message("Adding configuration container")
+ descr = get_config_descriptor(domainsid);
setup_add_ldif(samdb, setup_path("provision_configuration_basedn.ldif"), {
"CONFIGDN": names.configdn,
+ "DESCRIPTOR": descr,
})
message("Modifying configuration container")
setup_modify_ldif(samdb, setup_path("provision_configuration_basedn_modify.ldif"), {
"""
def setup_path(file):
- return os.path.join(setup_dir, file)
+ return os.path.join(setup_dir, file)
if domainsid is None:
domainsid = security.random_sid()
ldapi_url = "ldapi://%s" % urllib.quote(paths.s4_ldapi_path, safe="")
- schema = Schema(setup_path, schemadn=names.schemadn, serverdn=names.serverdn,
+ schema = Schema(setup_path, domainsid, schemadn=names.schemadn, serverdn=names.serverdn,
sambadn=names.sambadn, ldap_backend_type=ldap_backend_type)
secrets_credentials = credentials
git.samba.org / sfrench / samba-autobuild / .git / commitdiff