#include "includes.h"
#include "rpc_server/dcerpc_server.h"
#include "rpc_server/dcerpc_server_proto.h"
+#include "rpc_server/common/proto.h"
#include "librpc/rpc/dcerpc_proto.h"
#include "librpc/gen_ndr/ndr_dcerpc.h"
#include "auth/credentials/credentials.h"
#include "auth/gensec/gensec.h"
+#include "auth/auth.h"
#include "param/param.h"
+#include "librpc/rpc/rpc_common.h"
-/*
- parse any auth information from a dcerpc bind request
- return false if we can't handle the auth request for some
- reason (in which case we send a bind_nak)
-*/
-bool dcesrv_auth_bind(struct dcesrv_call_state *call)
+static bool dcesrv_auth_prepare_gensec(struct dcesrv_call_state *call)
{
- struct cli_credentials *server_credentials;
- struct ncacn_packet *pkt = &call->pkt;
+ struct cli_credentials *server_credentials = NULL;
struct dcesrv_connection *dce_conn = call->conn;
- struct dcesrv_auth *auth = &dce_conn->auth_state;
+ struct dcesrv_auth *auth = call->auth_state;
+ bool want_header_signing = false;
NTSTATUS status;
- enum ndr_err_code ndr_err;
- if (pkt->u.bind.auth_info.length == 0) {
- dce_conn->auth_state.auth_info = NULL;
- return true;
+ if (auth->auth_started) {
+ return false;
}
- dce_conn->auth_state.auth_info = talloc(dce_conn, struct dcerpc_auth);
- if (!dce_conn->auth_state.auth_info) {
+ auth->auth_started = true;
+
+ if (auth->auth_invalid) {
return false;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.bind.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ if (auth->auth_finished) {
return false;
}
- status = gensec_server_start(dce_conn, call->event_ctx, call->conn->dce_ctx->lp_ctx, call->msg_ctx, &auth->gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start GENSEC for DCERPC server: %s\n", nt_errstr(status)));
+ if (auth->gensec_security != NULL) {
return false;
}
+ switch (call->in_auth_info.auth_level) {
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ case DCERPC_AUTH_LEVEL_CALL:
+ case DCERPC_AUTH_LEVEL_PACKET:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ /*
+ * We evaluate auth_type only if auth_level was valid
+ */
+ break;
+ default:
+ /*
+ * Setting DCERPC_AUTH_LEVEL_NONE,
+ * gives the caller the reject_reason
+ * as auth_context_id.
+ *
+ * Note: DCERPC_AUTH_LEVEL_NONE == 1
+ */
+ auth->auth_type = DCERPC_AUTH_TYPE_NONE;
+ auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
+ auth->auth_context_id = DCERPC_BIND_NAK_REASON_NOT_SPECIFIED;
+ return false;
+ }
+
+ auth->auth_type = call->in_auth_info.auth_type;
+ auth->auth_level = call->in_auth_info.auth_level;
+ auth->auth_context_id = call->in_auth_info.auth_context_id;
+
server_credentials
- = cli_credentials_init(call);
+ = cli_credentials_init(auth);
if (!server_credentials) {
DEBUG(1, ("Failed to init server credentials\n"));
return false;
cli_credentials_set_conf(server_credentials, call->conn->dce_ctx->lp_ctx);
status = cli_credentials_set_machine_account(server_credentials, call->conn->dce_ctx->lp_ctx);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
- talloc_free(server_credentials);
- server_credentials = NULL;
+ DEBUG(1, ("Failed to obtain server credentials: %s\n",
+ nt_errstr(status)));
+ return false;
}
- gensec_set_credentials(auth->gensec_security, server_credentials);
-
- status = gensec_start_mech_by_authtype(auth->gensec_security, auth->auth_info->auth_type,
- auth->auth_info->auth_level);
-
+ status = samba_server_gensec_start(auth,
+ call->event_ctx,
+ call->msg_ctx,
+ call->conn->dce_ctx->lp_ctx,
+ server_credentials,
+ NULL,
+ &auth->gensec_security);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start GENSEC mechanism for DCERPC server: auth_type=%d, auth_level=%d: %s\n",
- (int)auth->auth_info->auth_type,
- (int)auth->auth_info->auth_level,
+ DEBUG(1, ("Failed to call samba_server_gensec_start %s\n",
nt_errstr(status)));
return false;
}
- return true;
-}
-
-/*
- add any auth information needed in a bind ack, and process the authentication
- information found in the bind.
-*/
-NTSTATUS dcesrv_auth_bind_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
-{
- struct dcesrv_connection *dce_conn = call->conn;
- NTSTATUS status;
-
- if (!call->conn->auth_state.gensec_security) {
- return NT_STATUS_OK;
+ /*
+ * We have to call this because we set the target_service for
+ * Kerberos to NULL above, and in any case we wish to log a
+ * more specific service target.
+ *
+ */
+ status = gensec_set_target_service_description(auth->gensec_security,
+ "DCE/RPC");
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to call gensec_set_target_service_description %s\n",
+ nt_errstr(status)));
+ return false;
}
- status = gensec_update(dce_conn->auth_state.gensec_security,
- call,
- dce_conn->auth_state.auth_info->credentials,
- &dce_conn->auth_state.auth_info->credentials);
-
- if (NT_STATUS_IS_OK(status)) {
- status = gensec_session_info(dce_conn->auth_state.gensec_security,
- &dce_conn->auth_state.session_info);
+ if (call->conn->remote_address != NULL) {
+ status = gensec_set_remote_address(auth->gensec_security,
+ call->conn->remote_address);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to establish session_info: %s\n", nt_errstr(status)));
- return status;
+ DEBUG(1, ("Failed to call gensec_set_remote_address() %s\n",
+ nt_errstr(status)));
+ return false;
}
-
- /* Now that we are authenticated, go back to the generic session key... */
- dce_conn->auth_state.session_key = dcesrv_generic_session_key;
- return NT_STATUS_OK;
- } else if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- dce_conn->auth_state.auth_info->auth_pad_length = 0;
- dce_conn->auth_state.auth_info->auth_reserved = 0;
- return NT_STATUS_OK;
- } else {
- DEBUG(2, ("Failed to start dcesrv auth negotiate: %s\n", nt_errstr(status)));
- return status;
}
-}
+ if (call->conn->local_address != NULL) {
+ status = gensec_set_local_address(auth->gensec_security,
+ call->conn->local_address);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to call gensec_set_local_address() %s\n",
+ nt_errstr(status)));
+ return false;
+ }
+ }
-/*
- process the final stage of a auth request
-*/
-bool dcesrv_auth_auth3(struct dcesrv_call_state *call)
-{
- struct ncacn_packet *pkt = &call->pkt;
- struct dcesrv_connection *dce_conn = call->conn;
- NTSTATUS status;
- enum ndr_err_code ndr_err;
+ status = gensec_start_mech_by_authtype(auth->gensec_security, auth->auth_type,
+ auth->auth_level);
+ if (!NT_STATUS_IS_OK(status)) {
+ const char *backend_name =
+ gensec_get_name_by_authtype(auth->gensec_security,
+ auth->auth_type);
+
+ DEBUG(3, ("Failed to start GENSEC mechanism for DCERPC server: "
+ "auth_type=%d (%s), auth_level=%d: %s\n",
+ (int)auth->auth_type, backend_name,
+ (int)auth->auth_level,
+ nt_errstr(status)));
- /* We can't work without an existing gensec state, and an new blob to feed it */
- if (!dce_conn->auth_state.auth_info ||
- !dce_conn->auth_state.gensec_security ||
- pkt->u.auth3.auth_info.length == 0) {
+ /*
+ * Setting DCERPC_AUTH_LEVEL_NONE,
+ * gives the caller the reject_reason
+ * as auth_context_id.
+ *
+ * Note: DCERPC_AUTH_LEVEL_NONE == 1
+ */
+ auth->auth_type = DCERPC_AUTH_TYPE_NONE;
+ auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
+ if (backend_name != NULL) {
+ auth->auth_context_id =
+ DCERPC_BIND_NAK_REASON_INVALID_CHECKSUM;
+ } else {
+ auth->auth_context_id =
+ DCERPC_BIND_NAK_REASON_INVALID_AUTH_TYPE;
+ }
return false;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.auth3.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- return false;
+ if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN) {
+ auth->client_hdr_signing = true;
+ want_header_signing = true;
}
- /* Pass the extra data we got from the client down to gensec for processing */
- status = gensec_update(dce_conn->auth_state.gensec_security,
- call,
- dce_conn->auth_state.auth_info->credentials,
- &dce_conn->auth_state.auth_info->credentials);
- if (NT_STATUS_IS_OK(status)) {
- status = gensec_session_info(dce_conn->auth_state.gensec_security,
- &dce_conn->auth_state.session_info);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to establish session_info: %s\n", nt_errstr(status)));
- return false;
- }
- /* Now that we are authenticated, go back to the generic session key... */
- dce_conn->auth_state.session_key = dcesrv_generic_session_key;
- return true;
- } else {
- DEBUG(4, ("dcesrv_auth_auth3: failed to authenticate: %s\n",
- nt_errstr(status)));
- return false;
+ if (want_header_signing) {
+ want_header_signing = gensec_have_feature(auth->gensec_security,
+ GENSEC_FEATURE_SIGN_PKT_HEADER);
+ }
+
+ if (want_header_signing) {
+ want_header_signing = lpcfg_parm_bool(dce_conn->dce_ctx->lp_ctx,
+ NULL,
+ "dcesrv",
+ "header signing",
+ true);
+ }
+
+ if (want_header_signing) {
+ gensec_want_feature(auth->gensec_security,
+ GENSEC_FEATURE_SIGN_PKT_HEADER);
+ auth->hdr_signing = true;
}
return true;
}
+static void log_successful_dcesrv_authz_event(struct dcesrv_call_state *call)
+{
+ struct dcesrv_auth *auth = call->auth_state;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(call->conn->endpoint->ep_description);
+ const char *auth_type = derpc_transport_string_by_transport(transport);
+ const char *transport_protection = AUTHZ_TRANSPORT_PROTECTION_NONE;
+
+ if (transport == NCACN_NP) {
+ transport_protection = AUTHZ_TRANSPORT_PROTECTION_SMB;
+ }
+
+ /*
+ * Log the authorization to this RPC interface. This
+ * covered ncacn_np pass-through auth, and anonymous
+ * DCE/RPC (eg epmapper, netlogon etc)
+ */
+ log_successful_authz_event(call->conn->msg_ctx,
+ call->conn->dce_ctx->lp_ctx,
+ call->conn->remote_address,
+ call->conn->local_address,
+ "DCE/RPC",
+ auth_type,
+ transport_protection,
+ auth->session_info);
+}
+
/*
- parse any auth information from a dcerpc alter request
- return false if we can't handle the auth request for some
- reason (in which case we send a bind_nak (is this true for here?))
+ parse any auth information from a dcerpc bind request
+ return false if we can't handle the auth request for some
+ reason (in which case we send a bind_nak)
*/
-bool dcesrv_auth_alter(struct dcesrv_call_state *call)
+bool dcesrv_auth_bind(struct dcesrv_call_state *call)
{
struct ncacn_packet *pkt = &call->pkt;
- struct dcesrv_connection *dce_conn = call->conn;
- enum ndr_err_code ndr_err;
+ struct dcesrv_auth *auth = call->auth_state;
+ NTSTATUS status;
- /* on a pure interface change there is no auth blob */
- if (pkt->u.alter.auth_info.length == 0) {
- return true;
- }
+ if (pkt->auth_length == 0) {
+ auth->auth_type = DCERPC_AUTH_TYPE_NONE;
+ auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
+ auth->auth_context_id = 0;
+ auth->auth_started = true;
- /* We can't work without an existing gensec state */
- if (!dce_conn->auth_state.gensec_security) {
- return false;
- }
+ log_successful_dcesrv_authz_event(call);
- dce_conn->auth_state.auth_info = talloc(dce_conn, struct dcerpc_auth);
- if (!dce_conn->auth_state.auth_info) {
- return false;
+ return true;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.alter.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.bind.auth_info,
+ &call->in_auth_info,
+ NULL, true);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * Setting DCERPC_AUTH_LEVEL_NONE,
+ * gives the caller the reject_reason
+ * as auth_context_id.
+ *
+ * Note: DCERPC_AUTH_LEVEL_NONE == 1
+ */
+ auth->auth_type = DCERPC_AUTH_TYPE_NONE;
+ auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
+ auth->auth_context_id =
+ DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED;
return false;
}
- return true;
+ return dcesrv_auth_prepare_gensec(call);
}
-/*
- add any auth information needed in a alter ack, and process the authentication
- information found in the alter.
-*/
-NTSTATUS dcesrv_auth_alter_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
+NTSTATUS dcesrv_auth_complete(struct dcesrv_call_state *call, NTSTATUS status)
{
- struct dcesrv_connection *dce_conn = call->conn;
- NTSTATUS status;
+ struct dcesrv_auth *auth = call->auth_state;
+ const char *pdu = "<unknown>";
- /* on a pure interface change there is no auth_info structure
- setup */
- if (!call->conn->auth_state.auth_info ||
- dce_conn->auth_state.auth_info->credentials.length == 0) {
- return NT_STATUS_OK;
+ switch (call->pkt.ptype) {
+ case DCERPC_PKT_BIND:
+ pdu = "BIND";
+ break;
+ case DCERPC_PKT_ALTER:
+ pdu = "ALTER";
+ break;
+ case DCERPC_PKT_AUTH3:
+ pdu = "AUTH3";
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ DEBUG(4, ("GENSEC not finished at at %s\n", pdu));
+ return NT_STATUS_RPC_SEC_PKG_ERROR;
+ }
+ break;
+ default:
+ return NT_STATUS_INTERNAL_ERROR;
}
- if (!call->conn->auth_state.gensec_security) {
- return NT_STATUS_INVALID_PARAMETER;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ return NT_STATUS_OK;
}
- status = gensec_update(dce_conn->auth_state.gensec_security,
- call,
- dce_conn->auth_state.auth_info->credentials,
- &dce_conn->auth_state.auth_info->credentials);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(4, ("GENSEC mech rejected the incoming authentication "
+ "at %s: %s\n", pdu, nt_errstr(status)));
+ return status;
+ }
- if (NT_STATUS_IS_OK(status)) {
- status = gensec_session_info(dce_conn->auth_state.gensec_security,
- &dce_conn->auth_state.session_info);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to establish session_info: %s\n", nt_errstr(status)));
- return status;
- }
+ status = gensec_session_info(auth->gensec_security,
+ auth,
+ &auth->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to establish session_info: %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+ auth->auth_finished = true;
- /* Now that we are authenticated, got back to the generic session key... */
- dce_conn->auth_state.session_key = dcesrv_generic_session_key;
- return NT_STATUS_OK;
- } else if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- dce_conn->auth_state.auth_info->auth_pad_length = 0;
- dce_conn->auth_state.auth_info->auth_reserved = 0;
+ if (call->pkt.ptype != DCERPC_PKT_AUTH3) {
return NT_STATUS_OK;
}
- DEBUG(2, ("Failed to finish dcesrv auth alter_ack: %s\n", nt_errstr(status)));
- return status;
-}
-
-/*
- generate a CONNECT level verifier
-*/
-static NTSTATUS dcesrv_connect_verifier(TALLOC_CTX *mem_ctx, DATA_BLOB *blob)
-{
- *blob = data_blob_talloc(mem_ctx, NULL, 16);
- if (blob->data == NULL) {
- return NT_STATUS_NO_MEMORY;
+ if (call->out_auth_info->credentials.length != 0) {
+ DEBUG(4, ("GENSEC produced output token (len=%zu) at %s\n",
+ call->out_auth_info->credentials.length, pdu));
+ return NT_STATUS_RPC_SEC_PKG_ERROR;
}
- SIVAL(blob->data, 0, 1);
- memset(blob->data+4, 0, 12);
+
return NT_STATUS_OK;
}
/*
- generate a CONNECT level verifier
+ add any auth information needed in a bind ack, and process the authentication
+ information found in the bind.
*/
-static NTSTATUS dcesrv_check_connect_verifier(DATA_BLOB *blob)
+NTSTATUS dcesrv_auth_prepare_bind_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
{
- if (blob->length != 16 ||
- IVAL(blob->data, 0) != 1) {
- return NT_STATUS_ACCESS_DENIED;
+ struct dcesrv_connection *dce_conn = call->conn;
+ struct dcesrv_auth *auth = call->auth_state;
+
+ dce_conn->allow_alter = true;
+
+ if (call->pkt.auth_length == 0) {
+ auth->auth_finished = true;
+ return NT_STATUS_OK;
+ }
+
+ /* We can't work without an existing gensec state */
+ if (auth->gensec_security == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
}
+
+ if (auth->hdr_signing) {
+ pkt->pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
+ }
+
+ call->_out_auth_info = (struct dcerpc_auth) {
+ .auth_type = auth->auth_type,
+ .auth_level = auth->auth_level,
+ .auth_context_id = auth->auth_context_id,
+ };
+ call->out_auth_info = &call->_out_auth_info;
+
return NT_STATUS_OK;
}
-
/*
- check credentials on a request
+ process the final stage of a auth request
*/
-bool dcesrv_auth_request(struct dcesrv_call_state *call, DATA_BLOB *full_packet)
+bool dcesrv_auth_prepare_auth3(struct dcesrv_call_state *call)
{
struct ncacn_packet *pkt = &call->pkt;
- struct dcesrv_connection *dce_conn = call->conn;
- DATA_BLOB auth_blob;
- struct dcerpc_auth auth;
- struct ndr_pull *ndr;
+ struct dcesrv_auth *auth = call->auth_state;
NTSTATUS status;
- enum ndr_err_code ndr_err;
- if (!dce_conn->auth_state.auth_info ||
- !dce_conn->auth_state.gensec_security) {
- return true;
+ if (pkt->auth_length == 0) {
+ return false;
}
- auth_blob.length = 8 + pkt->auth_length;
-
- /* check for a valid length */
- if (pkt->u.request.stub_and_verifier.length < auth_blob.length) {
+ if (auth->auth_finished) {
return false;
}
- auth_blob.data =
- pkt->u.request.stub_and_verifier.data +
- pkt->u.request.stub_and_verifier.length - auth_blob.length;
- pkt->u.request.stub_and_verifier.length -= auth_blob.length;
-
- /* pull the auth structure */
- ndr = ndr_pull_init_blob(&auth_blob, call, lp_iconv_convenience(call->conn->dce_ctx->lp_ctx));
- if (!ndr) {
+ /* We can't work without an existing gensec state */
+ if (auth->gensec_security == NULL) {
return false;
}
- if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
- ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.auth3.auth_info,
+ &call->in_auth_info, NULL, true);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * Windows returns DCERPC_NCA_S_FAULT_REMOTE_NO_MEMORY
+ * instead of DCERPC_NCA_S_PROTO_ERROR.
+ */
+ call->fault_code = DCERPC_NCA_S_FAULT_REMOTE_NO_MEMORY;
+ return false;
}
- ndr_err = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, &auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- talloc_free(ndr);
+ if (call->in_auth_info.auth_type != auth->auth_type) {
return false;
}
- /* check signature or unseal the packet */
- switch (dce_conn->auth_state.auth_info->auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- status = gensec_unseal_packet(dce_conn->auth_state.gensec_security,
- call,
- full_packet->data + DCERPC_REQUEST_LENGTH,
- pkt->u.request.stub_and_verifier.length,
- full_packet->data,
- full_packet->length-auth.credentials.length,
- &auth.credentials);
- memcpy(pkt->u.request.stub_and_verifier.data,
- full_packet->data + DCERPC_REQUEST_LENGTH,
- pkt->u.request.stub_and_verifier.length);
- break;
-
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- status = gensec_check_packet(dce_conn->auth_state.gensec_security,
- call,
- pkt->u.request.stub_and_verifier.data,
- pkt->u.request.stub_and_verifier.length,
- full_packet->data,
- full_packet->length-auth.credentials.length,
- &auth.credentials);
- break;
-
- case DCERPC_AUTH_LEVEL_CONNECT:
- status = dcesrv_check_connect_verifier(&auth.credentials);
- break;
-
- default:
- status = NT_STATUS_INVALID_LEVEL;
- break;
+ if (call->in_auth_info.auth_level != auth->auth_level) {
+ return false;
}
- /* remove the indicated amount of padding */
- if (pkt->u.request.stub_and_verifier.length < auth.auth_pad_length) {
- talloc_free(ndr);
+ if (call->in_auth_info.auth_context_id != auth->auth_context_id) {
return false;
}
- pkt->u.request.stub_and_verifier.length -= auth.auth_pad_length;
- talloc_free(ndr);
- return NT_STATUS_IS_OK(status);
-}
+ call->_out_auth_info = (struct dcerpc_auth) {
+ .auth_type = auth->auth_type,
+ .auth_level = auth->auth_level,
+ .auth_context_id = auth->auth_context_id,
+ };
+ call->out_auth_info = &call->_out_auth_info;
+ return true;
+}
-/*
- push a signed or sealed dcerpc request packet into a blob
+/*
+ parse any auth information from a dcerpc alter request
+ return false if we can't handle the auth request for some
+ reason (in which case we send a bind_nak (is this true for here?))
*/
-bool dcesrv_auth_response(struct dcesrv_call_state *call,
- DATA_BLOB *blob, struct ncacn_packet *pkt)
+bool dcesrv_auth_alter(struct dcesrv_call_state *call)
{
- struct dcesrv_connection *dce_conn = call->conn;
+ struct ncacn_packet *pkt = &call->pkt;
+ struct dcesrv_auth *auth = call->auth_state;
NTSTATUS status;
- enum ndr_err_code ndr_err;
- struct ndr_push *ndr;
- uint32_t payload_length;
- DATA_BLOB creds2;
- /* non-signed packets are simple */
- if (!dce_conn->auth_state.auth_info || !dce_conn->auth_state.gensec_security) {
- status = ncacn_push_auth(blob, call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx), pkt, NULL);
- return NT_STATUS_IS_OK(status);
+ /* on a pure interface change there is no auth blob */
+ if (pkt->auth_length == 0) {
+ if (!auth->auth_finished) {
+ return false;
+ }
+ return true;
}
- ndr = ndr_push_init_ctx(call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx));
- if (!ndr) {
+ if (auth->auth_finished) {
+ call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
return false;
}
- if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
- ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
+ /* We can't work without an existing gensec state */
+ if (auth->gensec_security == NULL) {
+ return false;
}
- ndr_err = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.alter.auth_info,
+ &call->in_auth_info, NULL, true);
+ if (!NT_STATUS_IS_OK(status)) {
+ call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
return false;
}
- /* pad to 16 byte multiple, match win2k3 */
- dce_conn->auth_state.auth_info->auth_pad_length = NDR_ALIGN(ndr, 16);
- ndr_push_zero(ndr, dce_conn->auth_state.auth_info->auth_pad_length);
-
- payload_length = ndr->offset - DCERPC_REQUEST_LENGTH;
-
- if (dce_conn->auth_state.auth_info->auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
- status = dcesrv_connect_verifier(call,
- &dce_conn->auth_state.auth_info->credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return false;
- }
- } else {
+ if (call->in_auth_info.auth_type == DCERPC_AUTH_TYPE_NONE) {
+ call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
+ return false;
+ }
- /* We hope this length is accruate. If must be if the
- * GENSEC mech does AEAD signing of the packet
- * headers */
- dce_conn->auth_state.auth_info->credentials
- = data_blob_talloc(call, NULL,
- gensec_sig_size(dce_conn->auth_state.gensec_security,
- payload_length));
- data_blob_clear(&dce_conn->auth_state.auth_info->credentials);
+ if (call->in_auth_info.auth_type != auth->auth_type) {
+ return false;
}
- /* add the auth verifier */
- ndr_err = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS,
- dce_conn->auth_state.auth_info);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ if (call->in_auth_info.auth_level != auth->auth_level) {
return false;
}
- /* extract the whole packet as a blob */
- *blob = ndr_push_blob(ndr);
+ if (call->in_auth_info.auth_context_id != auth->auth_context_id) {
+ return false;
+ }
- /* fill in the fragment length and auth_length, we can't fill
- in these earlier as we don't know the signature length (it
- could be variable length) */
- dcerpc_set_frag_length(blob, blob->length);
+ return true;
+}
- /* We hope this value is accruate. If must be if the GENSEC
- * mech does AEAD signing of the packet headers */
- dcerpc_set_auth_length(blob, dce_conn->auth_state.auth_info->credentials.length);
+/*
+ add any auth information needed in a alter ack, and process the authentication
+ information found in the alter.
+*/
+NTSTATUS dcesrv_auth_prepare_alter_ack(struct dcesrv_call_state *call, struct ncacn_packet *pkt)
+{
+ struct dcesrv_auth *auth = call->auth_state;
- /* sign or seal the packet */
- switch (dce_conn->auth_state.auth_info->auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- status = gensec_seal_packet(dce_conn->auth_state.gensec_security,
- call,
- ndr->data + DCERPC_REQUEST_LENGTH,
- payload_length,
- blob->data,
- blob->length - dce_conn->auth_state.auth_info->credentials.length,
- &creds2);
-
- if (NT_STATUS_IS_OK(status)) {
- blob->length -= dce_conn->auth_state.auth_info->credentials.length;
- if (!data_blob_append(call, blob, creds2.data, creds2.length))
- status = NT_STATUS_NO_MEMORY;
- else
- status = NT_STATUS_OK;
- }
+ /* on a pure interface change there is no auth_info structure
+ setup */
+ if (call->pkt.auth_length == 0) {
+ return NT_STATUS_OK;
+ }
- /* If we did AEAD signing of the packet headers, then we hope
- * this value didn't change... */
- dcerpc_set_auth_length(blob, creds2.length);
- dcerpc_set_frag_length(blob, dcerpc_get_frag_length(blob)+creds2.length);
- data_blob_free(&creds2);
- break;
+ if (auth->gensec_security == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- status = gensec_sign_packet(dce_conn->auth_state.gensec_security,
- call,
- ndr->data + DCERPC_REQUEST_LENGTH,
- payload_length,
- blob->data,
- blob->length - dce_conn->auth_state.auth_info->credentials.length,
- &creds2);
- if (NT_STATUS_IS_OK(status)) {
- blob->length -= dce_conn->auth_state.auth_info->credentials.length;
- if (!data_blob_append(call, blob, creds2.data, creds2.length))
- status = NT_STATUS_NO_MEMORY;
- else
- status = NT_STATUS_OK;
- }
+ call->_out_auth_info = (struct dcerpc_auth) {
+ .auth_type = auth->auth_type,
+ .auth_level = auth->auth_level,
+ .auth_context_id = auth->auth_context_id,
+ };
+ call->out_auth_info = &call->_out_auth_info;
- /* If we did AEAD signing of the packet headers, then we hope
- * this value didn't change... */
- dcerpc_set_auth_length(blob, creds2.length);
- dcerpc_set_frag_length(blob, dcerpc_get_frag_length(blob)+creds2.length);
- data_blob_free(&creds2);
- break;
+ return NT_STATUS_OK;
+}
- case DCERPC_AUTH_LEVEL_CONNECT:
- break;
+/*
+ check credentials on a packet
+*/
+bool dcesrv_auth_pkt_pull(struct dcesrv_call_state *call,
+ DATA_BLOB *full_packet,
+ uint8_t required_flags,
+ uint8_t optional_flags,
+ uint8_t payload_offset,
+ DATA_BLOB *payload_and_verifier)
+{
+ struct ncacn_packet *pkt = &call->pkt;
+ struct dcesrv_auth *auth = call->auth_state;
+ const struct dcerpc_auth tmp_auth = {
+ .auth_type = auth->auth_type,
+ .auth_level = auth->auth_level,
+ .auth_context_id = auth->auth_context_id,
+ };
+ NTSTATUS status;
- default:
- status = NT_STATUS_INVALID_LEVEL;
- break;
+ if (!auth->auth_finished) {
+ call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
+ return false;
}
- data_blob_free(&dce_conn->auth_state.auth_info->credentials);
+ if (auth->auth_invalid) {
+ return false;
+ }
+ status = dcerpc_ncacn_pull_pkt_auth(&tmp_auth,
+ auth->gensec_security,
+ call,
+ pkt->ptype,
+ required_flags,
+ optional_flags,
+ payload_offset,
+ payload_and_verifier,
+ full_packet,
+ pkt);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
+ call->fault_code = DCERPC_NCA_S_PROTO_ERROR;
+ return false;
+ }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_UNSUPPORTED_AUTHN_LEVEL)) {
+ call->fault_code = DCERPC_NCA_S_UNSUPPORTED_AUTHN_LEVEL;
+ return false;
+ }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_SEC_PKG_ERROR)) {
+ call->fault_code = DCERPC_FAULT_SEC_PKG_ERROR;
+ return false;
+ }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
+ call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
+ return false;
+ }
if (!NT_STATUS_IS_OK(status)) {
return false;
- }
+ }
return true;
}
+
+/*
+ push a signed or sealed dcerpc request packet into a blob
+*/
+bool dcesrv_auth_pkt_push(struct dcesrv_call_state *call,
+ DATA_BLOB *blob, size_t sig_size,
+ uint8_t payload_offset,
+ const DATA_BLOB *payload,
+ const struct ncacn_packet *pkt)
+{
+ struct dcesrv_auth *auth = call->auth_state;
+ const struct dcerpc_auth tmp_auth = {
+ .auth_type = auth->auth_type,
+ .auth_level = auth->auth_level,
+ .auth_context_id = auth->auth_context_id,
+ };
+ NTSTATUS status;
+
+ status = dcerpc_ncacn_push_pkt_auth(&tmp_auth,
+ auth->gensec_security,
+ call, blob, sig_size,
+ payload_offset,
+ payload,
+ pkt);
+ return NT_STATUS_IS_OK(status);
+}
git.samba.org / samba.git / blobdiff