Initial checkin of gRPC to third_party/

third_party/grpc/test/core/security/fetch_oauth2.c

Index: third_party/grpc/test/core/security/fetch_oauth2.c
diff --git a/third_party/grpc/test/core/security/fetch_oauth2.c b/third_party/grpc/test/core/security/fetch_oauth2.c
new file mode 100644
index 0000000000000000000000000000000000000000..87b54f1a0c3a871184371c8f7deca22976a56e59
--- /dev/null
+++ b/third_party/grpc/test/core/security/fetch_oauth2.c
@@ -0,0 +1,122 @@
+/*
+ *
+ * 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 <stdio.h>
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/sync.h>
+
+#include "src/core/security/credentials.h"
+#include "src/core/support/load_file.h"
+#include "test/core/security/oauth2_utils.h"
+
+static grpc_call_credentials *create_refresh_token_creds(
+    const char *json_refresh_token_file_path) {
+  int success;
+  gpr_slice refresh_token =
+      gpr_load_file(json_refresh_token_file_path, 1, &success);
+  if (!success) {
+    gpr_log(GPR_ERROR, "Could not read file %s.", json_refresh_token_file_path);
+    exit(1);
+  }
+  return grpc_google_refresh_token_credentials_create(
+      (const char *)GPR_SLICE_START_PTR(refresh_token), NULL);
+}
+
+int main(int argc, char **argv) {
+  grpc_call_credentials *creds = NULL;
+  char *json_key_file_path = NULL;
+  char *json_refresh_token_file_path = NULL;
+  char *token = NULL;
+  int use_gce = 0;
+  char *scope = NULL;
+  gpr_cmdline *cl = gpr_cmdline_create("fetch_oauth2");
+  gpr_cmdline_add_string(cl, "json_refresh_token",
+                         "File path of the json refresh token.",
+                         &json_refresh_token_file_path);
+  gpr_cmdline_add_flag(
+      cl, "gce",
+      "Get a token from the GCE metadata server (only works in GCE).",
+      &use_gce);
+  gpr_cmdline_parse(cl, argc, argv);
+
+  grpc_init();
+
+  if (json_key_file_path != NULL && json_refresh_token_file_path != NULL) {
+    gpr_log(GPR_ERROR,
+            "--json_key and --json_refresh_token are mutually exclusive.");
+    exit(1);
+  }
+
+  if (use_gce) {
+    if (json_key_file_path != NULL || scope != NULL) {
+      gpr_log(GPR_INFO,
+              "Ignoring json key and scope to get a token from the GCE "
+              "metadata server.");
+    }
+    creds = grpc_google_compute_engine_credentials_create(NULL);
+    if (creds == NULL) {
+      gpr_log(GPR_ERROR, "Could not create gce credentials.");
+      exit(1);
+    }
+  } else if (json_refresh_token_file_path != NULL) {
+    creds = create_refresh_token_creds(json_refresh_token_file_path);
+    if (creds == NULL) {
+      gpr_log(GPR_ERROR,
+              "Could not create refresh token creds. %s does probably not "
+              "contain a valid json refresh token.",
+              json_refresh_token_file_path);
+      exit(1);
+    }
+  } else {
+    gpr_log(GPR_ERROR, "Missing --gce or --json_refresh_token option.");
+    exit(1);
+  }
+  GPR_ASSERT(creds != NULL);
+
+  token = grpc_test_fetch_oauth2_token_with_credentials(creds);
+  if (token != NULL) {
+    printf("Got token: %s.\n", token);
+    gpr_free(token);
+  }
+  grpc_call_credentials_release(creds);
+  gpr_cmdline_destroy(cl);
+  grpc_shutdown();
+  return 0;
+}