1 files changed, 82 insertions, 0 deletions
diff --git a/src/core/lib/security/credentials/iam/iam_credentials.cc b/src/core/lib/security/credentials/iam/iam_credentials.cc
new file mode 100644
index 0000000000..75acb2a58e
--- /dev/null
+++ b/src/core/lib/security/credentials/iam/iam_credentials.cc
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright 2016 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/lib/security/credentials/iam/iam_credentials.h"
+
+#include <string.h>
+
+#include "src/core/lib/surface/api_trace.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+
+static void iam_destruct(grpc_call_credentials* creds) {
+  grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
+  grpc_credentials_mdelem_array_destroy(&c->md_array);
+}
+
+static bool iam_get_request_metadata(grpc_call_credentials* creds,
+                                     grpc_polling_entity* pollent,
+                                     grpc_auth_metadata_context context,
+                                     grpc_credentials_mdelem_array* md_array,
+                                     grpc_closure* on_request_metadata,
+                                     grpc_error** error) {
+  grpc_google_iam_credentials* c = (grpc_google_iam_credentials*)creds;
+  grpc_credentials_mdelem_array_append(md_array, &c->md_array);
+  return true;
+}
+
+static void iam_cancel_get_request_metadata(
+    grpc_call_credentials* c, grpc_credentials_mdelem_array* md_array,
+    grpc_error* error) {
+  GRPC_ERROR_UNREF(error);
+}
+
+static grpc_call_credentials_vtable iam_vtable = {
+    iam_destruct, iam_get_request_metadata, iam_cancel_get_request_metadata};
+
+grpc_call_credentials* grpc_google_iam_credentials_create(
+    const char* token, const char* authority_selector, void* reserved) {
+  grpc_core::ExecCtx exec_ctx;
+  GRPC_API_TRACE(
+      "grpc_iam_credentials_create(token=%s, authority_selector=%s, "
+      "reserved=%p)",
+      3, (token, authority_selector, reserved));
+  GPR_ASSERT(reserved == nullptr);
+  GPR_ASSERT(token != nullptr);
+  GPR_ASSERT(authority_selector != nullptr);
+  grpc_google_iam_credentials* c =
+      (grpc_google_iam_credentials*)gpr_zalloc(sizeof(*c));
+  c->base.type = GRPC_CALL_CREDENTIALS_TYPE_IAM;
+  c->base.vtable = &iam_vtable;
+  gpr_ref_init(&c->base.refcount, 1);
+  grpc_mdelem md = grpc_mdelem_from_slices(
+      grpc_slice_from_static_string(GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY),
+      grpc_slice_from_copied_string(token));
+  grpc_credentials_mdelem_array_add(&c->md_array, md);
+  GRPC_MDELEM_UNREF(md);
+  md = grpc_mdelem_from_slices(
+      grpc_slice_from_static_string(GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY),
+      grpc_slice_from_copied_string(authority_selector));
+  grpc_credentials_mdelem_array_add(&c->md_array, md);
+  GRPC_MDELEM_UNREF(md);
+
+  return &c->base;
+}