diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/dsdb/samdb/ldb_modules/samldb.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/samldb.c b/source4/dsdb/samdb/ldb_modules/samldb.c index f4b7043e32..79b557d5c8 100644 --- a/source4/dsdb/samdb/ldb_modules/samldb.c +++ b/source4/dsdb/samdb/ldb_modules/samldb.c @@ -1444,6 +1444,152 @@ static int samldb_member_check(struct samldb_ctx *ac) return LDB_SUCCESS; } +/* This trigger adapts the "servicePrincipalName" attributes if the + * "dNSHostName" attribute changes */ +static int samldb_service_principal_names_change(struct samldb_ctx *ac) +{ + struct ldb_context *ldb = ldb_module_get_ctx(ac->module); + struct ldb_message_element *el = NULL; + struct ldb_message *msg; + const char *attrs[] = { "servicePrincipalName", NULL }; + struct ldb_result *res; + const char *dns_hostname, *old_dns_hostname; + unsigned int i; + int ret; + + /* Here it's not the same logic as with "samldb_get_single_valued_attr". + * We need to: + * + * - consider "add" and "replace" operations - the last value we take + * - ignore "delete" operations - obviously this attribute isn't + * write protected + */ + for (i = 0; i < ac->msg->num_elements; i++) { + if (ldb_attr_cmp(ac->msg->elements[i].name, + "dNSHostName") != 0) { + continue; + } + + if (LDB_FLAG_MOD_TYPE(ac->msg->elements[i].flags) + != LDB_FLAG_MOD_DELETE) { + el = &ac->msg->elements[i]; + } + } + if (el == NULL) { + /* we are not affected */ + return LDB_SUCCESS; + } + + /* Create a temporary message for fetching the "dNSHostName" */ + msg = ldb_msg_new(ac->msg); + if (msg == NULL) { + return ldb_module_oom(ac->module); + } + ret = ldb_msg_add(msg, el, 0); + if (ret != LDB_SUCCESS) { + return ret; + } + dns_hostname = ldb_msg_find_attr_as_string(msg, "dNSHostName", ""); + talloc_free(msg); + + old_dns_hostname = samdb_search_string(ldb, ac, ac->msg->dn, + "dNSHostName", NULL); + if ((old_dns_hostname == NULL) || (strcasecmp(old_dns_hostname, + dns_hostname) == 0)) { + /* Well, if there's no old DNS hostname then we cannot do this. + * And if old and new DNS name do match we are also finished + * here. */ + return LDB_SUCCESS; + } + + /* Potential "servicePrincipalName" changes in the same request have to + * be handled before the update (Windows behaviour). */ + el = ldb_msg_find_element(ac->msg, "servicePrincipalName"); + if (el != NULL) { + msg = ldb_msg_new(ac->msg); + if (msg == NULL) { + return ldb_module_oom(ac->module); + } + msg->dn = ac->msg->dn; + + do { + ret = ldb_msg_add(msg, el, el->flags); + if (ret != LDB_SUCCESS) { + return ret; + } + + ldb_msg_remove_element(ac->msg, el); + + el = ldb_msg_find_element(ac->msg, + "servicePrincipalName"); + } while (el != NULL); + + ret = dsdb_module_modify(ac->module, msg, + DSDB_FLAG_NEXT_MODULE); + if (ret != LDB_SUCCESS) { + return ret; + } + talloc_free(msg); + } + + /* Fetch the "servicePrincipalName"s if any */ + ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs, + NULL); + if (ret != LDB_SUCCESS) { + return ret; + } + if ((res->count != 1) || (res->msgs[0]->num_elements > 1)) { + return ldb_operr(ldb); + } + + if (res->msgs[0]->num_elements == 1) { + /* Yes, we do have "servicePrincipalName"s. First we update them + * locally, that means we do always substitute the current + * "dNSHostName" with the new one and then we append this to the + * modification request (Windows behaviour). */ + + for (i = 0; i < res->msgs[0]->elements[0].num_values; i++) { + char *old_str, *new_str, *pos; + const char *tok; + + old_str = (char *) + res->msgs[0]->elements[0].values[i].data; + + new_str = talloc_strdup(ac->msg, + strtok_r(old_str, "/", &pos)); + if (new_str == NULL) { + return ldb_module_oom(ac->module); + } + + while ((tok = strtok_r(NULL, "/", &pos)) != NULL) { + if (strcasecmp(tok, old_dns_hostname) == 0) { + tok = dns_hostname; + } + + new_str = talloc_asprintf(ac->msg, "%s/%s", + new_str, tok); + if (new_str == NULL) { + return ldb_module_oom(ac->module); + } + } + + ret = ldb_msg_add_string(ac->msg, + "servicePrincipalName", + new_str); + if (ret != LDB_SUCCESS) { + return ret; + } + } + + el = ldb_msg_find_element(ac->msg, "servicePrincipalName"); + el->flags = LDB_FLAG_MOD_REPLACE; + } + + talloc_free(res); + + return LDB_SUCCESS; +} + /* add */ static int samldb_add(struct ldb_module *module, struct ldb_request *req) @@ -1630,6 +1776,15 @@ static int samldb_modify(struct ldb_module *module, struct ldb_request *req) } } + el = ldb_msg_find_element(ac->msg, "dNSHostName"); + if (el != NULL) { + modified = true; + ret = samldb_service_principal_names_change(ac); + if (ret != LDB_SUCCESS) { + return ret; + } + } + if (modified) { struct ldb_request *child_req; |