Initial checkin of gRPC to third_party/

third_party/grpc/test/core/security/oauth2_utils.c

Index: third_party/grpc/test/core/security/oauth2_utils.c
diff --git a/third_party/grpc/test/core/security/oauth2_utils.c b/third_party/grpc/test/core/security/oauth2_utils.c
new file mode 100644
index 0000000000000000000000000000000000000000..9b70afffe1eebd4a20db36ed76d151f8b70e1a40
--- /dev/null
+++ b/third_party/grpc/test/core/security/oauth2_utils.c
@@ -0,0 +1,112 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/security/oauth2_utils.h"
+
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/sync.h>
+
+#include "src/core/security/credentials.h"
+
+typedef struct {
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  int is_done;
+  char *token;
+} oauth2_request;
+
+static void on_oauth2_response(grpc_exec_ctx *exec_ctx, void *user_data,
+                               grpc_credentials_md *md_elems, size_t num_md,
+                               grpc_credentials_status status) {
+  oauth2_request *request = user_data;
+  char *token = NULL;
+  gpr_slice token_slice;
+  if (status == GRPC_CREDENTIALS_ERROR) {
+    gpr_log(GPR_ERROR, "Fetching token failed.");
+  } else {
+    GPR_ASSERT(num_md == 1);
+    token_slice = md_elems[0].value;
+    token = gpr_malloc(GPR_SLICE_LENGTH(token_slice) + 1);
+    memcpy(token, GPR_SLICE_START_PTR(token_slice),
+           GPR_SLICE_LENGTH(token_slice));
+    token[GPR_SLICE_LENGTH(token_slice)] = '\0';
+  }
+  gpr_mu_lock(request->mu);
+  request->is_done = 1;
+  request->token = token;
+  grpc_pollset_kick(request->pollset, NULL);
+  gpr_mu_unlock(request->mu);
+}
+
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *unused, bool success) {}
+
+char *grpc_test_fetch_oauth2_token_with_credentials(
+    grpc_call_credentials *creds) {
+  oauth2_request request;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_closure do_nothing_closure;
+  grpc_auth_metadata_context null_ctx = {"", "", NULL, NULL};
+
+  request.pollset = gpr_malloc(grpc_pollset_size());
+  grpc_pollset_init(request.pollset, &request.mu);
+  request.is_done = 0;
+
+  grpc_closure_init(&do_nothing_closure, do_nothing, NULL);
+
+  grpc_call_credentials_get_request_metadata(&exec_ctx, creds, request.pollset,
+                                             null_ctx, on_oauth2_response,
+                                             &request);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  gpr_mu_lock(request.mu);
+  while (!request.is_done) {
+    grpc_pollset_worker *worker = NULL;
+    grpc_pollset_work(&exec_ctx, request.pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC),
+                      gpr_inf_future(GPR_CLOCK_MONOTONIC));
+  }
+  gpr_mu_unlock(request.mu);
+
+  grpc_pollset_shutdown(&exec_ctx, request.pollset, &do_nothing_closure);
+  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_destroy(request.pollset);
+  gpr_free(request.pollset);
+  return request.token;
+}