Revert "Revert "Add TSI zero-copy frame protector""

1 files changed, 64 insertions, 0 deletions

diff --git a/src/core/tsi/transport_security_grpc.c b/src/core/tsi/transport_security_grpc.c
new file mode 100644
index 0000000000..ab2b6ddd54
--- /dev/null
+++ b/src/core/tsi/transport_security_grpc.c
@@ -0,0 +1,64 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include "src/core/tsi/transport_security_grpc.h"
+
+/* This method creates a tsi_zero_copy_grpc_protector object.  */
+tsi_result tsi_handshaker_result_create_zero_copy_grpc_protector(
+    const tsi_handshaker_result *self, size_t *max_protected_frame_size,
+    tsi_zero_copy_grpc_protector **protector) {
+  if (self == NULL || self->vtable == NULL || protector == NULL) {
+    return TSI_INVALID_ARGUMENT;
+  }
+  if (self->vtable->create_zero_copy_grpc_protector == NULL) {
+    return TSI_UNIMPLEMENTED;
+  }
+  return self->vtable->create_zero_copy_grpc_protector(
+      self, max_protected_frame_size, protector);
+}
+
+/* --- tsi_zero_copy_grpc_protector common implementation. ---
+
+   Calls specific implementation after state/input validation. */
+
+tsi_result tsi_zero_copy_grpc_protector_protect(
+    tsi_zero_copy_grpc_protector *self, grpc_slice_buffer *unprotected_slices,
+    grpc_slice_buffer *protected_slices) {
+  if (self == NULL || self->vtable == NULL || unprotected_slices == NULL ||
+      protected_slices == NULL) {
+    return TSI_INVALID_ARGUMENT;
+  }
+  if (self->vtable->protect == NULL) return TSI_UNIMPLEMENTED;
+  return self->vtable->protect(self, unprotected_slices, protected_slices);
+}
+
+tsi_result tsi_zero_copy_grpc_protector_unprotect(
+    tsi_zero_copy_grpc_protector *self, grpc_slice_buffer *protected_slices,
+    grpc_slice_buffer *unprotected_slices) {
+  if (self == NULL || self->vtable == NULL || protected_slices == NULL ||
+      unprotected_slices == NULL) {
+    return TSI_INVALID_ARGUMENT;
+  }
+  if (self->vtable->unprotect == NULL) return TSI_UNIMPLEMENTED;
+  return self->vtable->unprotect(self, protected_slices, unprotected_slices);
+}
+
+void tsi_zero_copy_grpc_protector_destroy(tsi_zero_copy_grpc_protector *self) {
+  if (self == NULL) return;
+  self->vtable->destroy(self);
+}