Unix SMB/CIFS mplementation.
Helper functions for applying replicated objects
- Copyright (C) Stefan Metzmacher 2007
+ Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
+#include "lib/crypto/crypto.h"
+#include "libcli/auth/libcli_auth.h"
+#include "param/param.h"
+
+static WERROR dsdb_decrypt_attribute_value(TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *gensec_skey,
+ bool rid_crypt,
+ uint32_t rid,
+ DATA_BLOB *in,
+ DATA_BLOB *out)
+{
+ DATA_BLOB confounder;
+ DATA_BLOB enc_buffer;
+
+ struct MD5Context md5;
+ uint8_t _enc_key[16];
+ DATA_BLOB enc_key;
+
+ DATA_BLOB dec_buffer;
+
+ uint32_t crc32_given;
+ uint32_t crc32_calc;
+ DATA_BLOB checked_buffer;
+
+ DATA_BLOB plain_buffer;
+
+ /*
+ * users with rid == 0 should not exist
+ */
+ if (rid_crypt && rid == 0) {
+ return WERR_DS_DRA_INVALID_PARAMETER;
+ }
+
+ /*
+ * the first 16 bytes at the beginning are the confounder
+ * followed by the 4 byte crc32 checksum
+ */
+ if (in->length < 20) {
+ return WERR_DS_DRA_INVALID_PARAMETER;
+ }
+ confounder = data_blob_const(in->data, 16);
+ enc_buffer = data_blob_const(in->data + 16, in->length - 16);
+
+ /*
+ * build the encryption key md5 over the session key followed
+ * by the confounder
+ *
+ * here the gensec session key is used and
+ * not the dcerpc ncacn_ip_tcp "SystemLibraryDTC" key!
+ */
+ enc_key = data_blob_const(_enc_key, sizeof(_enc_key));
+ MD5Init(&md5);
+ MD5Update(&md5, gensec_skey->data, gensec_skey->length);
+ MD5Update(&md5, confounder.data, confounder.length);
+ MD5Final(enc_key.data, &md5);
+
+ /*
+ * copy the encrypted buffer part and
+ * decrypt it using the created encryption key using arcfour
+ */
+ dec_buffer = data_blob_const(enc_buffer.data, enc_buffer.length);
+ arcfour_crypt_blob(dec_buffer.data, dec_buffer.length, &enc_key);
+
+ /*
+ * the first 4 byte are the crc32 checksum
+ * of the remaining bytes
+ */
+ crc32_given = IVAL(dec_buffer.data, 0);
+ crc32_calc = crc32_calc_buffer(dec_buffer.data + 4 , dec_buffer.length - 4);
+ if (crc32_given != crc32_calc) {
+ return WERR_SEC_E_DECRYPT_FAILURE;
+ }
+ checked_buffer = data_blob_const(dec_buffer.data + 4, dec_buffer.length - 4);
+
+ plain_buffer = data_blob_talloc(mem_ctx, checked_buffer.data, checked_buffer.length);
+ W_ERROR_HAVE_NO_MEMORY(plain_buffer.data);
+
+ /*
+ * The following rid_crypt obfuscation isn't session specific
+ * and not really needed here, because we allways know the rid of the
+ * user account.
+ *
+ * But for the rest of samba it's easier when we remove this static
+ * obfuscation here
+ */
+ if (rid_crypt) {
+ uint32_t i, num_hashes;
+
+ if ((checked_buffer.length % 16) != 0) {
+ return WERR_DS_DRA_INVALID_PARAMETER;
+ }
+
+ num_hashes = plain_buffer.length / 16;
+ for (i = 0; i < num_hashes; i++) {
+ uint32_t offset = i * 16;
+ sam_rid_crypt(rid, checked_buffer.data + offset, plain_buffer.data + offset, 0);
+ }
+ }
+
+ *out = plain_buffer;
+ return WERR_OK;
+}
+
+static WERROR dsdb_decrypt_attribute(const DATA_BLOB *gensec_skey,
+ uint32_t rid,
+ struct drsuapi_DsReplicaAttribute *attr)
+{
+ WERROR status;
+ TALLOC_CTX *mem_ctx;
+ DATA_BLOB *enc_data;
+ DATA_BLOB plain_data;
+ bool rid_crypt = false;
+
+ if (attr->value_ctr.num_values == 0) {
+ return WERR_OK;
+ }
+
+ switch (attr->attid) {
+ case DRSUAPI_ATTRIBUTE_dBCSPwd:
+ case DRSUAPI_ATTRIBUTE_unicodePwd:
+ case DRSUAPI_ATTRIBUTE_ntPwdHistory:
+ case DRSUAPI_ATTRIBUTE_lmPwdHistory:
+ rid_crypt = true;
+ break;
+ case DRSUAPI_ATTRIBUTE_supplementalCredentials:
+ case DRSUAPI_ATTRIBUTE_priorValue:
+ case DRSUAPI_ATTRIBUTE_currentValue:
+ case DRSUAPI_ATTRIBUTE_trustAuthOutgoing:
+ case DRSUAPI_ATTRIBUTE_trustAuthIncoming:
+ case DRSUAPI_ATTRIBUTE_initialAuthOutgoing:
+ case DRSUAPI_ATTRIBUTE_initialAuthIncoming:
+ break;
+ default:
+ return WERR_OK;
+ }
+
+ if (attr->value_ctr.num_values > 1) {
+ return WERR_DS_DRA_INVALID_PARAMETER;
+ }
+
+ if (!attr->value_ctr.values[0].blob) {
+ return WERR_DS_DRA_INVALID_PARAMETER;
+ }
+
+ mem_ctx = attr->value_ctr.values[0].blob;
+ enc_data = attr->value_ctr.values[0].blob;
+
+ status = dsdb_decrypt_attribute_value(mem_ctx,
+ gensec_skey,
+ rid_crypt,
+ rid,
+ enc_data,
+ &plain_data);
+ W_ERROR_NOT_OK_RETURN(status);
+
+ talloc_free(attr->value_ctr.values[0].blob->data);
+ *attr->value_ctr.values[0].blob = plain_data;
+
+ return WERR_OK;
+}
static WERROR dsdb_convert_object(struct ldb_context *ldb,
const struct dsdb_schema *schema,
struct dsdb_extended_replicated_objects *ctr,
const struct drsuapi_DsReplicaObjectListItemEx *in,
+ const DATA_BLOB *gensec_skey,
TALLOC_CTX *mem_ctx,
struct dsdb_extended_replicated_object *out)
{
NTSTATUS nt_status;
+ enum ndr_err_code ndr_err;
WERROR status;
uint32_t i;
struct ldb_message *msg;
struct drsuapi_DsReplicaAttribute *name_a = NULL;
struct drsuapi_DsReplicaMetaData *name_d = NULL;
struct replPropertyMetaData1 *rdn_m = NULL;
+ struct dom_sid *sid = NULL;
+ uint32_t rid = 0;
int ret;
if (!in->object.identifier) {
return WERR_FOOBAR;
}
+ if (in->object.attribute_ctr.num_attributes != 0 && !in->meta_data_ctr) {
+ return WERR_FOOBAR;
+ }
+
+ if (in->object.attribute_ctr.num_attributes != in->meta_data_ctr->count) {
+ return WERR_FOOBAR;
+ }
+
+ sid = &in->object.identifier->sid;
+ if (sid->num_auths > 0) {
+ rid = sid->sub_auths[sid->num_auths - 1];
+ }
+
msg = ldb_msg_new(mem_ctx);
W_ERROR_HAVE_NO_MEMORY(msg);
msg->num_elements);
W_ERROR_HAVE_NO_MEMORY(msg->elements);
- for (i=0; i < msg->num_elements; i++) {
- status = dsdb_attribute_drsuapi_to_ldb(schema,
- &in->object.attribute_ctr.attributes[i],
- msg->elements, &msg->elements[i]);
- W_ERROR_NOT_OK_RETURN(status);
- }
-
- if (in->object.attribute_ctr.num_attributes != 0 && !in->meta_data_ctr) {
- return WERR_FOOBAR;
- }
-
- if (in->object.attribute_ctr.num_attributes != in->meta_data_ctr->count) {
- return WERR_FOOBAR;
- }
-
md = talloc(mem_ctx, struct replPropertyMetaDataBlob);
W_ERROR_HAVE_NO_MEMORY(md);
struct drsuapi_DsReplicaAttribute *a;
struct drsuapi_DsReplicaMetaData *d;
struct replPropertyMetaData1 *m;
+ struct ldb_message_element *e;
a = &in->object.attribute_ctr.attributes[i];
d = &in->meta_data_ctr->meta_data[i];
m = &md->ctr.ctr1.array[i];
+ e = &msg->elements[i];
+
+ status = dsdb_decrypt_attribute(gensec_skey, rid, a);
+ W_ERROR_NOT_OK_RETURN(status);
+
+ status = dsdb_attribute_drsuapi_to_ldb(schema, a, msg->elements, e);
+ W_ERROR_NOT_OK_RETURN(status);
m->attid = a->attid;
m->version = d->version;
- m->orginating_time = d->orginating_time;
- m->orginating_invocation_id = d->orginating_invocation_id;
- m->orginating_usn = d->orginating_usn;
+ m->originating_change_time = d->originating_change_time;
+ m->originating_invocation_id = d->originating_invocation_id;
+ m->originating_usn = d->originating_usn;
m->local_usn = 0;
- if (d->orginating_time > whenChanged) {
- whenChanged = d->orginating_time;
+ if (d->originating_change_time > whenChanged) {
+ whenChanged = d->originating_change_time;
}
if (a->attid == DRSUAPI_ATTRIBUTE_name) {
rdn_m->attid = rdn_attid;
rdn_m->version = name_d->version;
- rdn_m->orginating_time = name_d->orginating_time;
- rdn_m->orginating_invocation_id = name_d->orginating_invocation_id;
- rdn_m->orginating_usn = name_d->orginating_usn;
+ rdn_m->originating_change_time = name_d->originating_change_time;
+ rdn_m->originating_invocation_id = name_d->originating_invocation_id;
+ rdn_m->originating_usn = name_d->originating_usn;
rdn_m->local_usn = 0;
md->ctr.ctr1.count++;
whenChanged_s = ldb_timestring(msg, whenChanged_t);
W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
- nt_status = ndr_push_struct_blob(&guid_value, msg, &in->object.identifier->guid,
+ ndr_err = ndr_push_struct_blob(&guid_value, msg,
+ lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
+ &in->object.identifier->guid,
(ndr_push_flags_fn_t)ndr_push_GUID);
- if (!NT_STATUS_IS_OK(nt_status)) {
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ nt_status = ndr_map_error2ntstatus(ndr_err);
return ntstatus_to_werror(nt_status);
}
const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
const struct repsFromTo1 *source_dsa,
const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
+ const DATA_BLOB *gensec_skey,
TALLOC_CTX *mem_ctx,
struct dsdb_extended_replicated_objects **_out)
{
return WERR_FOOBAR;
}
- status = dsdb_convert_object(ldb, schema, out, cur, out->objects, &out->objects[i]);
+ status = dsdb_convert_object(ldb, schema, out, cur, gensec_skey, out->objects, &out->objects[i]);
W_ERROR_NOT_OK_RETURN(status);
}
if (i != out->num_objects) {
ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, out, &ext_res);
if (ret != LDB_SUCCESS) {
- DEBUG(0,("Failed to apply records: %d: %s\n",
- ret, ldb_strerror(ret)));
+ DEBUG(0,("Failed to apply records: %s: %s\n",
+ ldb_errstring(ldb), ldb_strerror(ret)));
talloc_free(out);
return WERR_FOOBAR;
}
git.samba.org / samba.git / blobdiff