trusty: keymaster: Implement begin
Test: builds
Change-Id: Icb5470a8c95131ee3d68ab2ce41423302b9ed531
diff --git a/trusty/keymaster/trusty_keymaster_device.cpp b/trusty/keymaster/trusty_keymaster_device.cpp
index 2132ae1..6be0719 100644
--- a/trusty/keymaster/trusty_keymaster_device.cpp
+++ b/trusty/keymaster/trusty_keymaster_device.cpp
@@ -463,6 +463,41 @@
keymaster_key_param_set_t* out_params,
keymaster_operation_handle_t* operation_handle) {
ALOGD("Device received begin");
+
+ if (error_ != KM_ERROR_OK) {
+ return error_;
+ }
+ if (!key || !key->key_material) {
+ return KM_ERROR_UNEXPECTED_NULL_POINTER;
+ }
+ if (!operation_handle) {
+ return KM_ERROR_OUTPUT_PARAMETER_NULL;
+ }
+
+ if (out_params) {
+ *out_params = {};
+ }
+
+ BeginOperationRequest request;
+ request.purpose = purpose;
+ request.SetKeyMaterial(*key);
+ request.additional_params.Reinitialize(*in_params);
+
+ BeginOperationResponse response;
+ keymaster_error_t err = Send(KM_BEGIN_OPERATION, request, &response);
+ if (err != KM_ERROR_OK) {
+ return err;
+ }
+
+ if (response.output_params.size() > 0) {
+ if (out_params) {
+ response.output_params.CopyToParamSet(out_params);
+ } else {
+ return KM_ERROR_OUTPUT_PARAMETER_NULL;
+ }
+ }
+ *operation_handle = response.op_handle;
+
return KM_ERROR_OK;
}