--- /dev/null
+/*
+ *
+ * Copyright 2018 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 <grpc/support/port_platform.h>
+
+#include "src/core/tsi/alts/frame_protector/alts_crypter.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+
+static void maybe_copy_error_msg(const char* src, char** dst) {
+ if (dst != nullptr && src != nullptr) {
+ *dst = static_cast<char*>(gpr_malloc(strlen(src) + 1));
+ memcpy(*dst, src, strlen(src) + 1);
+ }
+}
+
+grpc_status_code alts_crypter_process_in_place(
+ alts_crypter* crypter, unsigned char* data, size_t data_allocated_size,
+ size_t data_size, size_t* output_size, char** error_details) {
+ if (crypter != nullptr && crypter->vtable != nullptr &&
+ crypter->vtable->process_in_place != nullptr) {
+ return crypter->vtable->process_in_place(crypter, data, data_allocated_size,
+ data_size, output_size,
+ error_details);
+ }
+ /* An error occurred. */
+ const char error_msg[] =
+ "crypter or crypter->vtable has not been initialized properly.";
+ maybe_copy_error_msg(error_msg, error_details);
+ return GRPC_STATUS_INVALID_ARGUMENT;
+}
+
+size_t alts_crypter_num_overhead_bytes(const alts_crypter* crypter) {
+ if (crypter != nullptr && crypter->vtable != nullptr &&
+ crypter->vtable->num_overhead_bytes != nullptr) {
+ return crypter->vtable->num_overhead_bytes(crypter);
+ }
+ /* An error occurred. */
+ return 0;
+}
+
+void alts_crypter_destroy(alts_crypter* crypter) {
+ if (crypter != nullptr) {
+ if (crypter->vtable != nullptr && crypter->vtable->destruct != nullptr) {
+ crypter->vtable->destruct(crypter);
+ }
+ gpr_free(crypter);
+ }
+}